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WO2024245136A1 - Instrument chirurgical - Google Patents

Instrument chirurgical Download PDF

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Publication number
WO2024245136A1
WO2024245136A1 PCT/CN2024/095181 CN2024095181W WO2024245136A1 WO 2024245136 A1 WO2024245136 A1 WO 2024245136A1 CN 2024095181 W CN2024095181 W CN 2024095181W WO 2024245136 A1 WO2024245136 A1 WO 2024245136A1
Authority
WO
WIPO (PCT)
Prior art keywords
surgical instrument
bracket
tool assembly
proximal direction
switching member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/095181
Other languages
English (en)
Chinese (zh)
Inventor
丁水澄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Touchstone International Medical Science Co Ltd
Original Assignee
Touchstone International Medical Science Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202310631457.1A external-priority patent/CN119055297B/zh
Priority claimed from CN202321357723.8U external-priority patent/CN220025113U/zh
Application filed by Touchstone International Medical Science Co Ltd filed Critical Touchstone International Medical Science Co Ltd
Publication of WO2024245136A1 publication Critical patent/WO2024245136A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
    • A61B17/115—Staplers for performing anastomosis, e.g. in a single operation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges

Definitions

  • the present disclosure relates to the technical field of medical instruments, and in particular, to a surgical instrument for stapling (and cutting) tissues during surgery.
  • the present disclosure provides a surgical instrument for nailing (and cutting) tissue during surgery, which can avoid accidental firing of the tool assembly in an open state due to misoperation, thereby improving the reliability and safety of the surgical procedure.
  • the surgical instrument is used to apply the nails in the nail magazine of the tool assembly to the tissue and cause the nails to be formed under the guidance of the nail anvil of the tool assembly.
  • the surgical instrument includes: a trigger for the doctor to operate; a bracket, the distal end of which is configured to be fixed to the nail magazine or the nail anvil so as to shorten the distance between the nail magazine and the nail anvil by moving in the proximal direction; a switching member, which is movable relative to the bracket in the distal-proximal direction and is configured to move from a first position to a second position in the proximal direction following the movement of the bracket in the proximal direction; and a pushing member, which is located on one side of the bracket and can move in the distal direction to cause the tool assembly to fire.
  • the pushing member When the switching member is in the first position, the pushing member is supported by the switching member and a clearance gap is formed between it and the bracket to avoid the trigger.
  • the pushing member moves toward the bracket until its first abutting surface abuts or faces the second abutting surface of the switching member, so that the switching member can be driven by the trigger to push the pushing member in the distal direction.
  • the switching member When the tool assembly is in an open state, that is, the distance between the nail magazine and the nail anvil is not shortened as the bracket is operated, the switching member is located in the first position and supports the pushing member, so that an avoidance gap is formed between the pushing member and the bracket to avoid the trigger. In this case, even if the trigger is misoperated, the trigger (the part that pushes other components) will move in the avoidance gap between the pushing member and the bracket, and will not push the pushing member to move in the distal direction, thereby preventing the tool assembly from being accidentally fired.
  • the switching member moves from the first position to the second position following the bracket, that is, the distance between the nail magazine and the nail anvil is shortened.
  • the switching member When the switching member is in the second position, the switching member is located in a position that can be pushed by the trigger and can push the pushing member, so that the doctor can cause the tool assembly to fire by operating the trigger.
  • this implementation can avoid the accidental firing of the tool assembly in the open state due to misoperation, thereby improving the reliability and safety of the surgical process.
  • this implementation has the advantage of easy operation.
  • the pusher is provided with an overlap portion, which extends from the first abutment surface toward the proximal direction.
  • the overlap portion overlaps the switching member in the distal-proximal direction, and the overlap portion is located on a side of the switching member away from the bracket.
  • the switching member when the switching member is in the second position, the switching member can prevent the pushing member from moving excessively inward (i.e. toward the bracket) by cooperating with the overlapping portion, thereby avoiding jamming caused by contact between the switching member and other components (e.g., the bracket or the compression spring).
  • the pusher includes a thick portion and a thin portion.
  • the thick portion is located proximal to the thin portion, the first abutting surface is the proximal end surface of the thick portion, and the inner side surface of the thick portion protrudes beyond the inner side surface of the thin portion.
  • the switching member When the switching member is located in the first position, the switching member abuts against the inner side surface of the thin portion to support the pusher.
  • the switching member When the switching member is in the first position, the sum of the thickness of the switching member and the pushing member is greater than the sum of the thickness of the two members when the switching member is in the second position.
  • the switching member when the switching member is in the first position, the switching member will abut against the inner side surface of the thin portion of the pushing member. This structure is conducive to reducing the sum of the thickness of the switching member and the pushing member when the switching member is in the first position, thereby helping to reduce the overall size of the surgical instrument.
  • the first abutment surface is the proximal end surface of the thick portion, which makes the first abutment surface have a larger width.
  • the larger the width of the first abutment surface the more reliable the process of the switching member pushing the pushing member to move, and the less likely the two are to be separated accidentally. It can be seen that the above implementation is conducive to improving the reliability of the surgical instrument.
  • a convex strip is provided on the side of the switching member facing the pushing member.
  • the convex strip can be on the outer side of the switching member (i.e., the switching member).
  • a gap is formed between the outer side of the switching member (i.e., the side facing the pushing member) and the inner side of the pushing member (i.e., the side of the pushing member facing the switching member), which will help the switching member to smoothly cross the step between the inner side of the thin part and the inner side of the thick part of the pushing member in the process of moving from the first position to the second position, thereby reducing the possibility of jamming.
  • the area of the portion where the switching member contacts the inner side of the pushing member can be reduced.
  • the friction between the switching member and the pushing member will be smaller, so that the movement of the switching member will be smoother, which is beneficial to reduce the possibility of jamming, and is beneficial to reduce the force required to drive the switching member to achieve the purpose of saving effort.
  • the pusher is provided with a leg
  • the surgical instrument further comprises a guide member.
  • the guide member cooperates with the leg to guide the pusher to deviate to a side away from the support and leave the moving path of the switching member, and prevent the pusher from entering the moving path of the switching member again.
  • the tool assembly During an operation, after the tool assembly is fired, it is usually not desirable for the tool assembly to be accidentally fired again. If the tool assembly is accidentally fired again, the tool assembly may cause unexpected harm to the patient. For example, the cutter may be pushed out again and cut tissue.
  • the pusher during the resetting of the pusher, the pusher will leave the moving path of the switching member through the cooperation of the legs and the guide member. After the pusher is completely reset, the cooperation of the legs and the guide member will prevent the pusher from entering the moving path of the switching member again. In this way, after the firing is completed, even if the doctor accidentally operates the trigger again, the tool assembly will not be accidentally fired again.
  • the bracket includes a slender portion extending in a distal-proximal direction, the slender portion is provided with a shoulder, the switching piece is sleeved on the slender portion and is located distal to the shoulder and abuts against the shoulder, and the surgical instrument also includes a first force-applying piece, which is configured to apply force to the switching piece in a proximal direction.
  • the first force-applying member presses the switching member against the shoulder of the slender portion, so that during the process of the bracket moving in the proximal direction, the switching member will follow the bracket moving in the proximal direction and move from the first position to the second position.
  • the doctor can operate the trigger to apply a force to the switching member to overcome the force applied by the first force-applying member and move in the distal direction, thereby causing the tool assembly to fire.
  • the switching member is switched from the first position to the second position in the proximal direction following the bracket moving in the proximal direction, and the switching member is allowed to move in the distal direction relative to the bracket under the drive of the trigger, causing the tool assembly to fire.
  • This implementation method has many advantages such as simple structure and easy operation.
  • the surgical instrument further includes an actuating mechanism, which can be driven by a trigger to cause the support to move in a proximal direction.
  • the doctor can first operate the trigger once to move the bracket in the proximal direction; after the tool assembly is switched to the closed state, the doctor can operate the trigger once more to fire the tool assembly. In this way, it is achieved that one trigger is used to sequentially close the tool assembly and fire the tool assembly. Compared with using two triggers to respectively close the tool assembly and fire the tool assembly, the above implementation method can reduce the number of components of the surgical instrument, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument, and helping to improve the reliability of the surgical instrument.
  • the actuating mechanism includes: a fixed pulley; a moving member movable relative to the bracket in a distal-proximal direction; and a flexible member wound around the fixed pulley and having its two ends respectively connected to the moving member and the bracket, so that as the moving member moves in the distal direction under the push of the trigger, the flexible member pulls the bracket to move in the proximal direction.
  • the bracket can move from the third position to the fourth position in the proximal direction under the pulling of the flexible member; the surgical instrument also includes an adjustment mechanism, wherein when the bracket is in the fourth position, the adjustment mechanism can cause the bracket to move further in the proximal direction to fine-tune the distance between the nail magazine and the nail anvil.
  • the doctor can switch the tool assembly from the open state to the pre-closed state by operating the trigger to quickly and significantly shorten the distance between the nail magazine and the nail anvil. Then, the doctor can fine-tune the distance between the nail magazine and the nail anvil by operating the adjustment mechanism to gradually (or continuously) shorten the distance between the nail magazine and the nail anvil to match the thickness of the tissue to be treated, and then switch the tool assembly to the closed state.
  • the surgical instrument can be better applicable to tissues of different thicknesses, and the tool assembly can be switched from the open state to the closed state more quickly and conveniently.
  • the bracket includes a slender portion extending in a distal-proximal direction, the slender portion is provided with a shoulder, the moving part and the switching part are both mounted on the slender portion, the switching part is located on the distal side of the shoulder and is configured to abut against the shoulder, and the surgical instrument also includes a first force-applying member, the first force-applying member is configured as a compression spring mounted on the slender portion, the proximal end of the compression spring presses against the switching part and the distal end presses against the moving part.
  • the switching member switches from the first position to the second position in the proximal direction following the bracket moving in the proximal direction, and the switching member is allowed to move in the distal direction relative to the bracket under the drive of the trigger to cause the tool assembly to fire.
  • the first force applying member configured as a compression spring will apply force to the moving member in the distal direction, so that the flexible member can be kept tensioned, thereby preventing the flexible member from falling off the fixed pulley.
  • the moving part defines a receiving space on its inner circumference for receiving the switching part.
  • the switch member can be received in the receiving space.
  • This implementation can fully utilize space, which is conducive to reducing the overall size of the surgical instrument.
  • this implementation enables the trigger to directly push the moving part in the distal direction when it is operated for the first time, and enables the trigger to directly push the switching part in the distal direction when it is operated for the second time.
  • the surgical instrument further includes a second force-applying member, which is configured to apply force to the pusher toward the bracket.
  • a second force-applying member which is configured to apply force to the pusher toward the bracket.
  • the surgical instrument further includes an action member extending between the pushing member and the tool assembly, wherein as the pushing member moves in a distal direction, the pushing member pushes the action member to move in a distal direction to fire the tool assembly.
  • the surgical instrument further includes a firing reset member, which is configured to cause the active member to move in a proximal direction after the tool assembly is fired.
  • the action member will move in the proximal direction and push the push member to move in the proximal direction to reset the firing mechanism and reset the firing member (and the knife) of the tool assembly.
  • the tool assembly further includes a firing member, and the action member is configured to push the firing member in a distal direction so that the firing member pushes the nail out of the nail magazine in a distal direction to cause the tool assembly to fire.
  • a knife is further provided in the nail magazine, and the firing member is configured to push the nail and the knife out of the nail magazine in a distal direction to cause the tool assembly to fire.
  • FIG. 1 is a schematic structural diagram of a surgical instrument according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram showing a trigger, a bracket, a pushing member, a switching member, etc. of the surgical instrument in FIG. 1 .
  • FIG. 3 is another schematic structural diagram showing the trigger, bracket, push member, switching member, etc. in FIG. 2 .
  • FIG. 4 is another schematic structural diagram showing the trigger, bracket, pusher, switch member, etc. in FIG. 2 .
  • FIG. 5 is another schematic structural diagram showing the trigger, bracket, pusher, switch member, etc. in FIG. 2 .
  • FIG. 6 is a structural schematic diagram showing the cooperative relationship between the pushing member and the switching member in FIG. 2 .
  • FIG. 7 is another structural schematic diagram showing the cooperative relationship between the pushing member and the switching member in FIG. 2 .
  • FIG. 8 is a schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 9 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 10 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 11 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 12 is a schematic structural diagram of a support of the surgical instrument in FIG. 1 .
  • FIG. 13 is a schematic structural diagram of a pusher of the surgical instrument in FIG. 1 .
  • FIG. 14 is a schematic structural diagram of the pusher in FIG. 13 as viewed from another viewing direction.
  • FIG. 15 is a schematic structural diagram showing a portion of the housing of the surgical instrument in FIG. 1 .
  • FIG16 is a schematic cross-sectional view taken along line A-A in FIG15.
  • FIG. 17 is a schematic diagram showing the cooperative relationship between the legs and the guide member during the movement of the push member in FIG. 13 toward the distal direction.
  • FIG. 18 is a schematic diagram showing the cooperative relationship between the legs and the guide member during the movement of the push member in FIG. 13 toward the proximal direction.
  • FIG. 19 is a schematic structural diagram showing the support, the action member and the firing and resetting member of the surgical instrument in FIG. 1 .
  • FIG. 20 is a schematic structural diagram showing a moving member, a switching member and a first force-applying member of the surgical instrument in FIG. 1 .
  • FIG. 21 is a schematic structural diagram showing the adjustment mechanism and housing of the surgical instrument in FIG. 1 .
  • FIG. 22 is a schematic structural diagram showing the surgical instrument in FIG. 1 after the tool assembly is removed.
  • FIG. 23 is a schematic exploded view of the tool assembly of FIG. 22 .
  • the present disclosure provides a surgical instrument 10, which can switch a tool assembly 20 provided thereon from an open state to a closed state, and can fire the tool assembly 20.
  • the tool assembly 20 includes a nail magazine 21 and a nail anvil 22.
  • the nails to be formed are stored in the nail magazine 21.
  • a knife for cutting tissue can also be stored in the nail magazine 21.
  • the tool assembly 20 can be arranged at the distal end of the surgical instrument 10.
  • the distance between the nail magazine 21 and the nail anvil 22 is large, so that the tissue can be placed therebetween.
  • the distance between the nail magazine 21 and the nail anvil 22 is small, so that the nails can be well formed and the tissues can be well nailed, and it should be ensured that the tissues will not be damaged due to excessive squeezing by the nail magazine 21 and the nail anvil 22.
  • the term “near” may be used to generally indicate an end, side, or portion of an element (device, mechanism, component, or portion) that is closer to a physician; the term “far” may be used to generally indicate an end, side, or portion of an element that is farther from a physician.
  • arrow X+ may be used to indicate the far side of the far-near direction
  • arrow X- may be used to indicate the near side of the far-near direction.
  • the surgical instrument 10 includes a trigger 12, a bracket 13, a firing mechanism 14, and a switching member 15.
  • the surgical instrument 10 may further include a housing 11, an actuating mechanism 16, an adjusting mechanism 17, and the like.
  • the trigger 12 is configured to be operated by a doctor and is configured to be movable between an initial position and an end position.
  • the doctor can operate the trigger 12 to move it from the initial position to the end position.
  • the initial position and the end position of a certain element are not necessarily the two extreme positions of the movable range of the element.
  • the surgical instrument 10 may include a trigger reset member 181.
  • the trigger reset member 181 may be configured to reset the trigger 12 to an initial position after the doctor releases the trigger 12.
  • the trigger reset member 181 may be a tension spring 181, one end of which is fixed to the trigger 12 and the other end is fixed to the housing 11.
  • the trigger reset member 181 may also be implemented in other ways.
  • the trigger reset member 181 may be a torsion spring.
  • the trigger 12 can be pivotally supported by the housing 11 to move between an initial position and its terminal position.
  • the housing 11 can define a handle 111 configured to be held by a physician.
  • the housing 11 can be composed of a pair of half-shells 11-1, 11-2. The pair of half-shells 11-1, 11-2 can be detachably assembled together to form a substantially closed internal space.
  • the bracket 13 is capable of moving in the distal-proximal direction.
  • the distal end of the bracket 13 is configured to be fixed to the nail magazine 21 or the nail anvil 22 so as to change the distance between the nail magazine 21 and the nail anvil 22 by moving in the distal-proximal direction.
  • the distance between the nail magazine 21 and the nail anvil 22 is shortened; as the bracket 13 moves in the distal direction, the distance between the nail magazine 21 and the nail anvil 22 is expanded.
  • the tool assembly 20 can be switched from an open state to a closed state. How to cause the bracket 13 to move in the proximal direction will be described in detail below and will not be described in detail here.
  • the bracket 13 may be movably supported by the housing 11 so as to be movable in the distal-proximal direction relative to the housing 11.
  • the nail magazine 21 may be fixed to the housing 11
  • the nail anvil 22 may be fixed to the bracket 131
  • the nail anvil 22 may be located at the distal side of the nail magazine 21 and face the nail magazine 21.
  • the nail magazine 21 can be fixed to the bracket 13, the nail anvil 22 can be fixed to the housing 11, and the nail magazine 21 can be located at the distal side of the nail anvil 22 and face the nail anvil 22.
  • This method can also achieve the purpose of shortening the distance between the nail magazine 21 and the nail anvil 22 by moving the bracket 13 in the proximal direction.
  • the bracket 13 may include an elongated portion 131, which may extend in the distal-proximal direction.
  • the bracket 13 may also include a frame portion 132, which may be located at the distal end of the elongated portion 131.
  • the frame portion 132 may be at least partially exposed outside the housing 11 and located at the distal side of the distal end of the housing 11.
  • One of the nail magazine 21 and the nail anvil 22 may be fixed to the frame portion 132, and the other may be fixed to the distal end of the housing 11.
  • the frame portion 132 may be generally rectangular, and both the nail magazine 21 and the nail anvil 22 may be located at the inner side of the frame portion 132.
  • the firing mechanism 14 is configured to be driven by the trigger 12 to cause the tool assembly 20 to fire.
  • the firing mechanism 14 includes a pusher 141.
  • the pusher 141 is located on one side of the bracket 13 in the width direction, and is movable in the distal-proximal direction, and is configured to move in the distal direction to cause the tool assembly 20 to fire. How the pusher 141 causes the tool assembly 20 to fire will be specifically described below, and will not be described in detail here.
  • the width direction may refer to a direction orthogonal to the far-near direction.
  • arrow Y+ may be used to indicate one side in the width direction
  • arrow Y- may be used to indicate the other side in the width direction.
  • the switching member 15 is configured to switch the firing mechanism 14 from an unfireable state to a fireable state. Specifically, the switching member 15 is configured to be movable relative to the bracket 13 in the distal-proximal direction. In addition, the switching member 15 is configured to follow the bracket 13 as it moves in the proximal direction. The support 13 moves toward the proximal direction from the first position to the second position. In Figures 2 and 6, the switching member 15 is located at the first position. In Figures 4 and 7, the switching member 15 is located at the second position.
  • the slender portion 131 may be provided with a shoulder 1311.
  • the switching member 15 is sleeved on the slender portion 131, and the switching member 15 is located distally of the shoulder 1311 and abuts against the shoulder 1311.
  • the surgical instrument 10 may include a force applying member 182 (i.e., a first force applying member), and the force applying member 182 is configured to apply force to the switching member 15 in a proximal direction.
  • the force applying member 182 may be configured as a compression spring 182.
  • the compression spring 182 may be sleeved on the slender portion 131, and is located distally of the switching member 15, and its proximal end abuts against the switching member 15.
  • the force-applying member 182 presses the switching member 15 against the shoulder 1311 of the elongated portion 131, so that when the support 13 moves in the proximal direction, the switching member 15 will follow the support 13 to move in the proximal direction and move from the first position to the second position.
  • the doctor can operate the trigger 12 to apply a driving force to the switching member 15 to overcome the applied force of the force-applying member 182, so that the switching member moves in the distal direction, thereby causing the tool assembly 20 to fire.
  • the switching member 15 moves from the first position to the second position in the proximal direction following the support 13 moving in the proximal direction, and the switching member 15 is allowed to move in the distal direction relative to the support 13 under the drive of the trigger 12, causing the tool assembly 20 to fire.
  • This implementation method has many advantages such as simple structure and convenient operation.
  • the switching member 15 when the switching member 15 is located at the first position, the switching member 15 supports the pushing member 141, so that an escape gap G1 for avoiding the trigger 12 is formed between the pushing member 141 and the bracket 13.
  • the trigger 12 as the trigger 12 is operated and moves from the initial position in Fig. 2 to the terminal position in Fig. 3, the trigger 12 (the part used to push other components) will move in the escape gap G1, and will not push the pushing member 141 to move in the distal direction, thereby not causing the tool assembly 20 to fire.
  • the switching member 15 moves in the proximal direction from the first position to the second position.
  • the pusher 141 moves in the medial direction (i.e., moves toward the bracket 13).
  • the medial direction may refer to the direction toward the bracket 13 in the width direction
  • the outer side may refer to the direction away from the bracket 13 in the width direction
  • the inner side of a component may refer to the side of the element facing the bracket 13 in the width direction
  • the outer side of a component may refer to the side of the element away from the bracket 13 in the width direction.
  • the first abutting surface 1411 of the pushing member 141 abuts against or faces the second abutting surface 151 of the switching member 15.
  • the trigger 12 the portion used to push other components
  • the switching member 15 will push the switching member 15 to move in the distal direction.
  • the second abutting surface 151 of the switching member 15 abuts against the first abutting surface 1411 of the pushing member 141, and the switching member 15 will push the pushing member 141 to move in the distal direction, thereby causing the tool assembly 20 to fire.
  • the switching member 15 when the tool assembly 20 is in the open state, that is, the distance between the nail magazine 21 and the nail anvil 22 is not shortened as the bracket 13 is operated, the switching member 15 is located in the first position and supports the push member 141, so that an avoidance gap G1 for avoiding the trigger 12 is formed between the push member 141 and the bracket 13. In this case, even if the trigger 12 is misoperated, the trigger 12 will move in the avoidance gap G1 between the push member 141 and the bracket 13, and will not push the push member 141 to move in the distal direction, thereby preventing the tool assembly 20 from being accidentally fired.
  • the switching member 15 moves from the first position to the second position following the bracket 13, that is, the distance between the nail magazine 21 and the nail anvil 22 is shortened.
  • the switching member 15 is located in a position that can be pushed by the trigger 12 and can push the push member 1411, so that the doctor can cause the tool assembly 20 to fire by operating the trigger.
  • this implementation can avoid the accidental firing of the tool assembly 20 in the open state due to misoperation, thereby improving the reliability and safety of the surgical process.
  • the pusher 141 may be provided with an overlap portion 1412, which extends from the first abutting surface 1411 toward the proximal direction. As shown in FIG7, when the switch member 14 is in the second position, the overlap portion 1412 overlaps the switch member 15 in the distal-proximal direction, and the overlap portion 1412 is located on the outside of the switch member 15 (i.e., on the side of the switch member 15 facing away from the bracket 13).
  • the switching member 15 when the switching member 15 is in the second position, the switching member 15 can cooperate with the overlapping portion 1412 of the pushing member 141 to prevent the pushing member 141 from moving excessively inward (i.e. toward the side of the bracket 13), thereby avoiding the occurrence of jamming caused by the contact between the switching member 15 and other components (for example, the bracket 13 or the compression spring 182).
  • the pusher 141 may include a thick portion 1413 and a thin portion 1414.
  • the thick portion 1413 is located proximal to the thin portion 1414
  • the first abutting surface 1411 is a proximal end surface of the thick portion 1413
  • the inner side surface 1415 of the thick portion 1413 protrudes beyond the inner side surface 1416 of the thin portion 1414.
  • the switching member 15 when the switching member 15 is located at the first position, the switching member 15 abuts against the inner side surface 1416 of the thin portion 1414 to support the pusher 141.
  • the switching member 15 When the switching member 15 is in the first position, the sum of its thickness and that of the pushing member 141 is greater than the sum of their thicknesses when it is in the second position. In the above implementation, when the switching member 15 is in the first position, the switching member 15 will abut against the inner side surface 1416 of the thin portion 1414 of the pushing member 141. This structure is beneficial to reducing the sum of the thickness of the switching member 15 and the pushing member 141 when the switching member 15 is in the first position, thereby helping to reduce the overall size of the surgical instrument 10.
  • the first abutment surface 1411 is the proximal surface of the thick portion 1413, which makes the first abutment surface 1411 have a larger width (i.e., the size in the Y+-Y- direction).
  • the larger the width of the first abutment surface 1411 the more reliable the movement process of the switching member 15 pushing the pushing member 141, and the less likely the two are to be accidentally separated. It can be seen that the above implementation is beneficial to improving the surgical instrument. The reliability of machine 10.
  • the outer side surface of the switching member 15 ie, the side surface of the switching member 15 facing the pushing member 141 ) may be provided with a convex strip 152 .
  • This structure has many advantages.
  • the protrusion 152 can form a gap G2 between the outer side surface of the switching member 15 (i.e., the side surface of the switching member 15 facing the pushing member 141) and the inner side surface of the pushing member 141 (i.e., the side surface of the pushing member 141 facing the switching member 15), which will help the switching member 15 to smoothly cross the step 1417 between the inner side surface 1416 of the thin portion 1414 and the inner side surface 1415 of the thick portion 1413 during the process of moving from the first position to the second position, thereby reducing the possibility of sticking.
  • the convex strip 152 provided on the outer side of the switching member 15 can reduce the area of the portion where the switching member 15 contacts the inner side of the pushing member 141. In this way, when the switching member 15 moves from the first position to the second position, the friction between the switching member 15 and the pushing member 141 will be smaller, so that the movement of the switching member 15 will be smoother, which is conducive to reducing the possibility of the occurrence of the stuck phenomenon and reducing the force required to drive the switching member 15 to achieve the purpose of labor saving.
  • the pusher 141 may be provided with a leg 1418, and the surgical instrument 10 may include a guide member 112.
  • the guide member 112 cooperates with the leg 1418 to guide the pusher 141 to deviate in the lateral direction (i.e., away from the bracket 13) and leave the moving path of the switching member 15, and prevent the pusher 141 from entering the moving path of the switching member 15 again.
  • the tool assembly 20 During an operation, after the tool assembly 20 is fired, it is not desirable that the tool assembly 20 is accidentally fired again. If the tool assembly 20 is accidentally fired again, the tool assembly 20 may cause unexpected harm to the patient. For example, the cutter may be pushed out again and cut the tissue.
  • the push member 141 during the resetting of the push member 141 after firing, the push member 141 will leave the moving path of the switching member 15 through the cooperation of the legs 1418 and the guide member 112. After the push member 141 is reset, the cooperation of the legs 1418 and the guide member 112 will prevent the push member 141 from entering the moving path of the switching member 15 again. In this way, after the firing is completed, even if the doctor accidentally operates the trigger 12 again, the tool assembly 20 will not be accidentally fired again.
  • the leg 1418 may include a guide portion 14181 configured to gradually incline toward the outside in the width direction (ie, the side away from the bracket 13 ) as it extends toward the proximal direction.
  • the guide portion 14181 As shown in Fig. 17, during the process of the push member 141 moving in the distal direction, when the guide portion 14181 meets the guide member 112, the distal end of the guide portion 14181 is closer to the inner side than the proximal end of the guide member 112. In this way, as the push member 141 continues to move in the distal direction, the guide member 112 will guide the push member 141 to deviate inwardly, so that the guide portion 14181 bypasses the guide member 112 on the inner side of the guide member 112, thereby allowing the push member 141 to move in the distal direction under the push of the switching member to fire the tool assembly 20.
  • the proximal end of the guide portion 14181 is further outward than the distal end of the guide member 112.
  • the guide member 112 will guide the push member 141 to deviate outward, so that the guide portion 14181 bypasses the guide member 112 on the outside of the guide member 112, thereby causing the push member 141 to deviate outward in the width direction to leave the moving path of the switching member 15.
  • the leg 1418 will allow the push member 141 to move in the distal direction under the push of the switching member 15 to fire the tool assembly 20, and can guide the push member 141 to deviate to the outside in the width direction and leave the moving path of the switching member 15 during the process of the push member 141 moving in the proximal direction after firing.
  • the leg 1418 may also include a retaining portion 14182, which is located at the distal end of the guide portion 14181, and the retaining portion 14182 is configured to abut against the guide member 112 to prevent the pusher 141 from entering the moving path of the switching member 15.
  • the retaining portion 14182 will abut against the guide member 112, thereby preventing the pusher 141 from entering the moving path of the switching member 15 again.
  • the present disclosure does not specifically limit the structure of the retaining portion 14182, as long as the retaining portion 14182 can abut against the guide member 112 to prevent the pusher 141 from entering the moving path of the switching member 15 again.
  • the retaining portion 14182 can be configured to be substantially parallel to the far-near direction so that it can abut against the guide member 112 more stably.
  • the guide member 112 has a guide surface 1121 located on its outer side.
  • the guide surface 1121 cooperates with the guide portion 14181 to guide the push member 141 to deviate outward in the width direction; when the push member 141 moves in the proximal direction to its extreme position, the proximal end of the guide surface 1121 abuts against the retaining portion 14182 to prevent the push member 141 from entering the moving path of the switching member 15.
  • the guide surface 1121 can be constructed to gradually tilt outward in the width direction as it extends in the proximal direction. This structure of the guide surface 1121 is conducive to increasing the distance that the push member 141 deviates outward in the width direction under the guidance of the guide member 112.
  • the inner side 1122 of the guide member 112 can be constructed to be roughly parallel to the far-near direction.
  • the inner side 1122 of the guide member 112 contacts the leg 1418 (the guide portion 14181). Since the inner side 1122 of the guide member 112 is constructed to be roughly parallel to the far-near direction, it will not or less cause the pusher 141 to deviate inwardly in the width direction. Therefore, this structure of the inner side 1122 of the guide member 112 is conducive to reducing the distance of the pusher 141 deviating inwardly in the width direction under the guidance of the guide member 112. If the pusher 141 deviates too much inwardly in the width direction, it may be squeezed with other components (such as bracket 13 or compression spring 182) to cause the leg 1418 to be damaged.
  • other components such as bracket 13 or compression spring 182
  • the guide member 112 may be formed on the housing 11
  • the guide member 112 may also be an independent component installed on the housing 11.
  • a guide groove 113 may be provided on the inner surface of the housing 11, and the guide groove 113 extends in the far-near direction.
  • the pusher 141 is placed in the guide groove 113 to move in the far-near direction under the guidance of the guide groove 113.
  • the two end surfaces 1131 and 1132 of the guide groove 113 in the far-near direction may respectively define the two extreme positions of the pusher 141 in the far-near direction.
  • the pusher 141 may include two legs 1418, and the two legs 1418 may be located at two sides of the pusher 141 in the height direction.
  • the surgical instrument 10 may include two guide members 112, and the two guide members 112 are respectively provided on two side walls of the guide groove 113 in the height direction to respectively cooperate with the two legs 1418. With this structure, the movement process of the pusher 141 will be more stable and smooth.
  • the height direction may refer to a direction orthogonal to both the far-near direction and the width direction.
  • arrow Z+ may be used to indicate one side of the height direction
  • arrow Z- may be used to indicate the other side of the height direction.
  • the surgical instrument 10 may further include a force applying member 183 (i.e., a second force applying member), which is configured to apply force to the push member 141 inwardly (i.e., toward the bracket 13).
  • a force applying member 183 i.e., a second force applying member
  • the force applying member 183 may be configured as a spring sheet 183, which may be located on the outer side of the push member 141 (i.e., on the side away from the bracket 13) and between the push member 141 and the housing 11.
  • the pushing member 141 when the switching member 15 reaches the second position, the pushing member 141 will move inward under the force applied by the force applying member 183, so that the first abutting surface 1411 of the pushing member 141 abuts against or faces the first abutting surface 151 of the switching member 15.
  • the surgical instrument 10 may not include the force applying member 183.
  • the pushing member 141 may be longer in the distal-proximal direction, so that the pushing member 141 can obtain the force to move toward the bracket 13 through its own elastic deformation.
  • the firing mechanism 14 may further include an action member
  • the action member 142 may have an elongated structure, which extends from the push member 141 to the tool assembly 20. Specifically, the proximal end of the action member 142 may abut against the distal end of the push member 141, and the distal end of the action member 142 may be combined with the tool assembly 20. As the push member 141 moves in the distal direction, the push member 141 pushes the action member 142 to move in the distal direction to fire the tool assembly 20. How the action member 142 moving in the distal direction causes the tool assembly 20 to fire will be described in detail below, and will not be described in detail here.
  • the surgical instrument 10 may further include a firing reset member 184, which is configured to cause the action member 142 to move in the proximal direction after the tool assembly 20 is fired.
  • a firing reset member 184 which is configured to cause the action member 142 to move in the proximal direction after the tool assembly 20 is fired.
  • the firing reset member 184 can be configured as a tension spring 184.
  • One end of the tension spring 184 is fixed to the bracket 13, and the other end is fixed to the action member 142.
  • the tension spring 184 is stretched and deformed; when the firing is completed, the action member 142 moves in the proximal direction under the action of the elastic restoring force of the tension spring 184.
  • the firing reset member 184 can be implemented in a variety of ways and is not limited to the tension spring 184.
  • the firing reset member can also be configured as a compression spring. One end of the compression spring can abut against the action member 142, and the other end can abut against the supporting structure of the housing 11, so as to apply a reset force to the action member 142 to move the action member 142 toward the proximal direction after the firing is completed.
  • the firing mechanism is described above by way of example. It should be understood that there are many ways to implement the firing mechanism, which are not limited to the above. The present disclosure does not impose any specific restrictions on the structure of the firing mechanism, as long as the tool assembly can be fired when the trigger is driven.
  • the firing mechanism may not include an action member, and a push member may extend from the trigger to the tool assembly to directly fire the tool assembly under the drive of the trigger, or the push member may be connected to the tool assembly through other components or mechanisms to indirectly fire the tool assembly under the drive of the trigger.
  • the surgical instrument 10 may include an actuating mechanism 16.
  • the actuating mechanism 16 is configured to be driven by the trigger 12 to cause the support 13 to move in the proximal direction.
  • the doctor may first operate the trigger 12 once to cause the support 13 to move in the proximal direction; after the tool assembly 100 is switched to the closed state, the doctor may operate the trigger 12 once again to cause the tool assembly 20 to fire.
  • this implementation method can reduce the number of components of the surgical instrument 10, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10, and helping to improve the reliability of the surgical instrument 10.
  • the surgical instrument 10 may include two triggers 12, and the two triggers 12 may be used to drive the firing mechanism 14 and the actuating mechanism 16, respectively. It should also be noted that, in some examples, the surgical instrument 10 may not include the actuating mechanism 16, and the bracket 13 may be moved in the distal direction by other means.
  • actuating mechanism 16 There are many ways to implement the actuating mechanism 16, and the present disclosure does not impose any specific restrictions on this. A possible implementation is given below. It is understood that the actuating mechanism 16 is not limited to the following implementation.
  • the actuating mechanism 16 may include a fixed pulley 161, a moving member 162, and a flexible member 163.
  • the fixed pulley 161 may be rotatably supported by the housing 11.
  • the moving member 162 is configured to be movable relative to the bracket 13 in the distal-proximal direction.
  • the flexible member 163 is wound around the fixed pulley 161, and the two ends of the flexible member 163 are respectively connected to the moving member 162 and the bracket 13, so that as the moving member 162 is pushed to the distal direction by the trigger 12, the flexible member 163 is moved to the distal direction.
  • the flexible member 163 pulls the support 13 to move in the proximal direction.
  • the flexible member 163 can be configured as a steel wire rope 163.
  • the surgical instrument 10 may also include a force-applying member 185 and a blocking member 19.
  • the force-applying member 185 is configured to apply force to the bracket 13 in the distal direction.
  • the blocking member 19 is configured to block the movement of the moving member 162 in the proximal direction after the bracket 13 moves from the third position (as shown in Figure 9) to the fourth position (as shown in Figure 10) in the proximal direction under the pulling of the flexible member 163, so as to keep the bracket 13 in the fourth position.
  • the third position and the fourth position of the bracket 13 can correspond to the first state and the second state of the tool assembly 20, respectively, the first state can be an open state, and the second state can be a closed state or a pre-closed state.
  • the bracket 13 overcomes the force applied by the force applying member 185 and moves in the proximal direction.
  • the blocking member 19 blocks the moving member 162 to prevent the moving member 162 from moving in the proximal direction under the force applied by the force applying member 185, thereby releasably restricting the bracket 13 from returning from the fourth position to the third position.
  • the tool assembly 20 after the tool assembly 20 is switched from the first state to the second state, even if the doctor releases the trigger 12, the tool assembly 20 will remain in the second state, which provides convenience and conditions for the doctor to perform subsequent operations.
  • the doctor can operate the blocking member 19 to release the moving member 162.
  • the moving member 162 After being released, the moving member 162 will move in the proximal direction under the force applied by the force applying member 185, thereby driving the bracket 13 to return to the third position, thereby causing the tool assembly 20 to switch to the first state. It can be seen that through the force applying member 185 and the blocking member 19, the operation of closing and opening the tool assembly 20 will be more convenient and reliable.
  • the blocking member 19 may include an operating portion 191, a blocking portion 192, and a connecting portion 193.
  • the operating portion 191 is configured to be operated by a doctor.
  • the blocking portion 192 is configured to block the movement of the moving member 162 in the proximal direction (when the bracket 13 is in the fourth position).
  • the blocking portion 192 and the operating portion 191 are pivotally supported (for example, supported by the housing 11) around a pair of substantially parallel pivot axes a1 , a2, respectively.
  • the connecting portion 193 extends between the operating portion 191 and the blocking portion 192 and is integrally formed with the two, and is configured to deform when the operating portion 191 is rotated, causing the blocking portion 192 to rotate to release the moving member 162.
  • this implementation only one component (i.e., the blocking member 19) is able to releasably block the proximal movement of the moving member 162. Therefore, this implementation is conducive to reducing the number of components of the surgical instrument 10, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10, and helping to improve the reliability of the surgical instrument 10.
  • the blocking member 19 can also be implemented as a combination of a spring and a latch finger.
  • the moving member 162 can be sleeved on the elongated body 131 to be slidably supported in the distal-proximal direction relative to the bracket 13.
  • the proximal end of the compression spring 182 presses against the switching member 15 to press the switching member 15 against the shoulder 1311, and the distal end of the compression spring 182 presses against the moving member 162.
  • the switching member 15 switches from the first position to the second position in the proximal direction following the bracket 13 moving in the proximal direction, and the switching member 15 is allowed to move in the distal direction relative to the bracket 13 under the drive of the trigger 12 to cause the tool assembly 20 to fire.
  • the compression spring 182 will apply force to the moving part 162 in the distal direction, so that the flexible part 163 remains tensioned, thereby preventing the flexible part 163 from falling off the fixed pulley 161.
  • the moving member 162 may define a receiving space 1621 configured to receive the switching member 15 (and the compression spring 182) on its inner circumference.
  • the switching member 15 When the switching member 15 is located at the first position, the switching member 15 (and the compression spring 182) may be accommodated in the receiving space 1621.
  • This implementation can fully utilize space and is conducive to reducing the overall size of the surgical instrument 10.
  • this implementation allows the trigger 12 to directly push the moving member 162 in the distal direction when it is operated for the first time, and allows the trigger 12 to directly push the switching member 15 in the distal direction when it is operated for the second time.
  • the moving member can drive the bracket through other transmission mechanisms.
  • the transmission mechanism only needs to convert the movement of the moving member in the distal direction into the movement of the bracket in the proximal direction.
  • the transmission mechanism may include a pair of racks respectively fixed to the bracket and the moving member, and a gear between the pair of racks and meshing with the two.
  • the surgical instrument 10 may include an adjustment mechanism 17.
  • the actuation mechanism 16 is configured to switch the tool assembly 20 from the first state (as shown in FIG. 9) to the second state (as shown in FIG. 10) by causing the support 13 to move in the distal direction, so as to shorten the distance between the cartridge 21 and the anvil 22.
  • the adjustment mechanism 17 is configured to finely adjust the distance between the cartridge 21 and the anvil 22 by causing the support 13 to further move in the proximal direction after the tool assembly 20 is switched to the second state, thereby switching the tool assembly 20 to the third state (as shown in FIG. 11) to further shorten the distance between the cartridge 21 and the anvil 22.
  • the bracket 13 moves from the third position (as shown in FIG9) to the fourth position (as shown in FIG10) in the proximal direction under the pulling of the flexible member 163, so that the tool assembly 20 switches from the first state to the second state, and the distance between the nail magazine 21 and the nail anvil 22 is reduced.
  • the bracket 13 further moves to the fifth position (as shown in FIG11) in the distal direction, so that the tool assembly 20 switches from the second state to the third state under the fine adjustment of the adjustment mechanism, and the distance between the nail magazine 21 and the nail anvil 22 is further reduced.
  • the tool assembly 20 is in the first state, the bracket 13 is in the third position, and the distance between the nail magazine 21 and the nail anvil 22 is D 1 .
  • the tool assembly 20 is in the second state, the bracket 13 is in the fourth position, and the distance between the nail magazine 21 and the nail anvil 22 is D 2 .
  • the tool assembly 20 is in the third state, the bracket 13 is in the fifth position, and the distance between the nail magazine 21 and the nail anvil 22 is D 3 .
  • D 1 is greater than D 2
  • D 2 is greater than D 3 .
  • the first state of the tool assembly 20 can be referred to as an open state
  • the second state of the tool assembly 20 can be referred to as a pre-closed state
  • the third state of the tool assembly 20 can be referred to as a closed state.
  • the third state is not a specific state, but a state when the distance between the staple cartridge 21 and the staple anvil 22 is adapted to the thickness of the tissue to be treated. In other words, the third state of the tool assembly 20 is determined according to the thickness of the tissue to be treated.
  • the spacing between the nail magazine 21 and the nail anvil 22 is not equal to zero.
  • the doctor can determine the spacing that matches the thickness of the tissue to be treated based on clinical experience.
  • the spacing should not be too large to ensure that the tissue does not accidentally slip out from between the nail magazine 21 and the nail anvil 22, and the spacing should not be too small to ensure that the tissue is not damaged due to excessive squeezing by the nail magazine 21 and the nail anvil 22.
  • the spacing should be set to a spacing at which the nails can be well formed and the tissue can be well nailed.
  • the spacing should also ensure that the knife can effectively cut the tissue.
  • the doctor can switch the tool assembly 20 from the open state to the pre-closed state by operating the trigger 12, so as to quickly and significantly shorten the distance between the staple cartridge 21 and the staple anvil 22. Then, the doctor can fine-tune the distance between the staple cartridge 21 and the staple anvil 22 by operating the adjustment mechanism 17, so as to gradually (or continuously) shorten the distance between the staple cartridge 21 and the staple anvil 22 to match the thickness of the tissue to be treated, and then switch the tool assembly 20 to the closed state.
  • the surgical instrument 10 can be preferably applied to tissues of different thicknesses, and the tool assembly 20 can be switched from the open state to the closed state relatively quickly and conveniently.
  • the surgical instrument 10 may not include the adjustment mechanism 17.
  • the actuation mechanism 16 may directly (or in other words, in one step) switch the tool assembly 20 from the open state to the closed state.
  • the first state of the tool assembly 20 is the open state
  • the second state of the tool assembly 20 is the closed state.
  • the adjustment mechanism 17 may include a first adjustment member 171, and the bracket 13 may include a first coupling portion 1312.
  • the first coupling portion 1312 may be located at the proximal end of the bracket 13.
  • the first adjustment member 171 is configured to be coupled with the first coupling portion 1312, so that by rotating the first adjustment member 171, the first adjustment member 171 can drive the bracket 13 to move further in the proximal direction from the fourth position in a spiral transmission manner, thereby fine-tuning the spacing between the nail magazine 21 and the nail anvil 22.
  • this implementation has many advantages.
  • this implementation has a large speed reduction transmission ratio, which can ensure a high adjustment accuracy. That is to say, even if the first adjustment member 171 is turned through a large angle, the bracket 13 will only move a small distance in the proximal direction, which allows the doctor to accurately and smoothly fine-tune the spacing between the nail magazine 21 and the nail anvil 22.
  • the bracket 13 after the bracket 13 is driven by the first adjustment member 171 to move in the proximal direction, even if the doctor releases the adjustment mechanism 17, the bracket 13 will not be separated from the first adjustment member 171 and accidentally return to its fourth position. Therefore, this implementation has a higher safety.
  • this implementation has a large speed reduction transmission ratio, the process of operating the adjustment mechanism 17 is more labor-saving.
  • one of the first coupling portion 1312 and the first adjusting member 171 may be provided with an external thread, and the other may be provided with an internal thread.
  • one of the first coupling portion 1312 and the first adjusting member 171 may be provided with a spiral groove, and the other may be provided with a guide column adapted to extend into the spiral groove to slide therein.
  • the adjustment mechanism 17 may further include an adjustment operating member 172.
  • the adjustment operating member 172 is configured to be operated by a doctor, and is configured to drive the first adjustment member 171 to rotate when being operated.
  • the adjustment operating member 172 may be provided with a receiving space 1721, and the first adjustment member 171 is accommodated in the receiving space 1721.
  • the first adjustment member 171 is configured to be movable relative to the adjustment operating member 172 in the far-near direction, and is configured to rotate following the adjustment operating member 172.
  • the first adjustment member 171 may have an outer surface that is generally prismatic, and the receiving space 1721 has an inner surface that is matched with a prismatic shape, so that the first adjustment member 171 can be movable relative to the adjustment operating member 172 in the far-near direction, and can rotate following the adjustment operating member 172.
  • the first adjustment member 171 may be located proximal to the first coupling portion 1312, so that when the bracket 13 is located at the third position, the first adjustment member 171 is spaced apart from the first coupling portion 1312 (as shown in FIG. 9 ), and when the bracket 13 is located at its fourth position, the first adjustment member 171 abuts against the first coupling portion 1312 (as shown in FIG. 10 ).
  • the adjustment mechanism 17 may also include a force applying member 173.
  • the force applying member 173 is configured to apply force to the first adjustment member 171 in the distal direction, so that when the bracket 13 is located at the fourth position, the force applying member 173 presses the first adjustment member 171 against the first coupling portion 1312. According to this structure, when the bracket 13 is located at the fourth position, the first adjustment member 171 can be threadedly engaged with the first coupling portion 1312 by rotating the adjustment operating member 172.
  • This implementation has the advantage of convenient operation.
  • the adjustment operating member 172 may also be provided with an exposure hole 1722 extending from the accommodating space 1721 to the proximal end surface of the adjustment operating member 172.
  • the adjustment mechanism 17 may also include an indicator member 174, and the indicator member 174 includes a flange portion 1741 located on its periphery.
  • the force-applying member 173 may be an elastic member 173.
  • the elastic member 173 is located on the proximal side of the first adjustment member 171, and the flange portion 1741 is located between the first adjustment member 171 and the elastic member 173.
  • the bracket 13 presses against the indicator member 174, so that a portion of the indicator member 174 extends out of the adjustment operating member 172 through the exposure hole 1722 to indicate the distance between the anvil 22 and the nail magazine 21.
  • the doctor can determine that the tool assembly 20 is currently in the first state.
  • the doctor can determine that the tool assembly 20 has been switched to the second state.
  • the adjustment operating member 172 is rotated, the first adjustment member 171 and the first coupling portion 1312 begin to couple, so that the first adjustment member 171 gradually moves toward the distal direction, and then the indicator member 174 moves toward the distal direction under the pressure of the elastic member 173, and the size of the exposed portion of the indicator member 174 gradually decreases.
  • the bracket 13 does not move toward the proximal direction. Therefore, in this process, the doctor can rotate the adjustment operating member 172 relatively quickly to make the adjustment mechanism 17 quickly complete the idle stroke.
  • the doctor can slow down the speed of rotating the adjustment operating member 172 to accurately adjust the distance between the nail magazine 21 and the nail anvil 22, and judge the distance between the nail magazine 21 and the nail anvil 22 according to the size of the exposed portion of the indicator member 174.
  • the indicator 174 can help the doctor to relatively accurately judge the state of the tool assembly 20 and the spacing between the nail cartridge and the nail anvil.
  • the adjustment operating member 172 can be rotatably supported by the housing 11.
  • the adjustment mechanism 17 further includes a connecting member 175, which includes a pair of shoulders 1751, 1752 arranged at intervals and a journal 1753 located therebetween.
  • a pair of half shells 11-1, 11-2 jointly define an axial hole 114.
  • the journal 1753 is rotatably placed in the axial hole 114, and a pair of shoulders 1751, 1752 are respectively located on the inner side and the outer side of the housing 11.
  • the connecting member 175 is rotatably supported by the housing 11.
  • the adjustment operating member 172 is constructed to be assembled with the connecting member 175 so that the connecting member 175 rotates together with the adjustment operating member 172. In this way, the adjustment operating member 172 is rotatably supported by the housing 11 through the connecting member 172.
  • the connecting member 175 may be provided with a pair of pins
  • the adjusting operating member 172 may be provided with a pair of holes. By inserting the pair of pins into the pair of holes, the adjusting operating member 172 and the connecting member 175 can be assembled together.
  • the adjustment mechanism 17 may include a ratchet and a pawl, and the bracket 13 may be provided with a rack portion meshed with the ratchet, so that the bracket 13 can be lockably driven to move in the proximal direction by rotating the ratchet.
  • the adjustment mechanism 17 may include a worm wheel and a worm, and the bracket 13 may be provided with a rack portion meshed with the worm wheel, so that the worm wheel can be driven by rotating the worm and the rack can be driven by the worm wheel, thereby achieving lockable driving of the bracket 13 to move in the proximal direction.
  • the adjustment mechanism 17 can drive the bracket 13 to move in the proximal direction by driving the moving member 162 to move in the distal direction.
  • the tool assembly 20 can be detachably mounted on the surgical instrument 10, so that the surgical instrument 10 can be used multiple times by replacing the tool assembly 20.
  • Fig. 22 shows the surgical instrument 10 after the tool assembly 20 is removed.
  • the tool assembly 20 can be constructed so that it cannot be removed from the surgical instrument 10 without destroying it, that is, the surgical instrument 10 can also be disposable.
  • the tool assembly 20 may include a nail magazine 21, a nail anvil 22, and a firing member 23.
  • the nail magazine 21 may store nails 24.
  • a knife 25 may be provided in the nail magazine 21. The knife 25 may be transmission-connected with the firing member 23 to follow the firing member 23 to move in the far-near direction.
  • the firing member 23 can be transmission-connected with the action member 142 of the firing mechanism 14 to move in the distal-proximal direction following the action member 142.
  • the firing member 23 moves in the distal direction under the push of the action member 142 and pushes the nail 24 and the cutter 25 out of the nail magazine 21, thereby firing the tool assembly 20.
  • the firing member 23 moves in the proximal direction under the drive of the action member 142 and drives the cutter 25 to return to the nail magazine 21 to prevent the cutter 25 from accidentally cutting the tissue.
  • first or second etc. may be used in the present disclosure to describe various elements (such as a first force applying member and a second force applying member), these elements are not defined by these terms, and these terms are only used to distinguish one element from another.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Pathology (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un instrument chirurgical, comprenant un déclencheur, un support, un élément de commutation et un élément de poussée. Lorsque l'élément de commutation est situé dans une première position, l'élément de poussée est supporté par l'élément de commutation et un espace d'évitement pour éviter le déclencheur est formé entre l'élément de poussée et le support. Lorsque l'élément de commutation est situé dans une seconde position, l'élément de poussée se déplace vers le support jusqu'à ce qu'une première face de butée de celui-ci vienne en butée contre ou fait face à une seconde face de butée de l'élément de commutation, de telle sorte que l'élément de commutation peut être entraîné par le déclencheur pour pousser l'élément de poussée dans une direction distale, provoquant ainsi le déclenchement d'un ensemble d'outils. Étant donné que l'ensemble d'outils peut être empêché d'être déclenché accidentellement dans un état ouvert, l'instrument chirurgical peut améliorer la fiabilité et la sécurité d'une intervention chirurgicale.
PCT/CN2024/095181 2023-05-31 2024-05-24 Instrument chirurgical Pending WO2024245136A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202310631457.1 2023-05-31
CN202321357723.8 2023-05-31
CN202310631457.1A CN119055297B (zh) 2023-05-31 2023-05-31 手术器械
CN202321357723.8U CN220025113U (zh) 2023-05-31 2023-05-31 手术器械

Publications (1)

Publication Number Publication Date
WO2024245136A1 true WO2024245136A1 (fr) 2024-12-05

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PCT/CN2024/095181 Pending WO2024245136A1 (fr) 2023-05-31 2024-05-24 Instrument chirurgical

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WO (1) WO2024245136A1 (fr)

Citations (5)

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Publication number Priority date Publication date Assignee Title
US5344061A (en) * 1993-08-03 1994-09-06 Lawrence Crainich Ratchet assembly for medical instrument
CN104039244A (zh) * 2012-01-05 2014-09-10 伊西康内外科公司 用于防止钳口过早打开的组织缝合器砧座特征结构
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CN113180767A (zh) * 2021-05-28 2021-07-30 江苏博朗森思医疗器械有限公司 具有防止卡刀功能的包皮环切吻合器
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