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WO2025043884A1 - Kit de canule - Google Patents

Kit de canule Download PDF

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Publication number
WO2025043884A1
WO2025043884A1 PCT/CN2023/130448 CN2023130448W WO2025043884A1 WO 2025043884 A1 WO2025043884 A1 WO 2025043884A1 CN 2023130448 W CN2023130448 W CN 2023130448W WO 2025043884 A1 WO2025043884 A1 WO 2025043884A1
Authority
WO
WIPO (PCT)
Prior art keywords
drainage
core
pipe section
segment
tube
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/CN2023/130448
Other languages
English (en)
Chinese (zh)
Inventor
刘鹏
刘日东
熊先明
许蓉蓉
王颖
刘志伟
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.)
Jiangsusaitengyiliaokejiyouxiangongsi
Original Assignee
Jiangsusaitengyiliaokejiyouxiangongsi
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
Application filed by Jiangsusaitengyiliaokejiyouxiangongsi filed Critical Jiangsusaitengyiliaokejiyouxiangongsi
Publication of WO2025043884A1 publication Critical patent/WO2025043884A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/367—Circuit parts not covered by the preceding subgroups of group A61M1/3621
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09175—Guide wires having specific characteristics at the distal tip

Definitions

  • the cannula is a key component in the extracorporeal membrane oxygenation (ECMO) system that is directly connected to the human blood vessels. It is a bridge connecting the ECMO extracorporeal circulation pipeline and the human blood vessels, and plays a vital role in the normal function of the ECMO system.
  • An ECMO system contains two cannulas, one for drawing out human venous blood, and one for returning arterial blood after oxygenation by the ECMO system to the human blood vessels.
  • the venous-to-venous cannula VV-ECMO is a cannula treatment method commonly used by the ECMO system for patients with pulmonary failure. Usually, a single-lumen cannula is used as a drainage tube.
  • One solution is to use a double-lumen cannula, insert the return tube into the drainage tube, and integrate the drainage line for transporting venous blood and the return line for transporting arterial blood into one. Only one cannula is required, which reduces the complexity of the operation and reduces the trauma to the body surface and blood vessels.
  • the drainage line and the loop line occupy the same blood vessel line, and the cross-sectional area of the line is limited. It is difficult to ensure that both the drainage line and the return line have sufficient cross-sectional area for flow, and the drainage and reflux effect cannot be guaranteed.
  • the placement of the double-lumen cannula depends on the guide core.
  • the outer wall of the guide core has a clamping portion.
  • the clamping portion fits with the inner wall of the drainage cavity and/or the inner wall of the first reflux pipe section.
  • the guide core includes a first guide core segment, a second guide core segment, a third guide core segment and a fourth guide core segment connected in sequence, and the guide core through hole passes through the first guide core segment, the second guide core segment, the third guide core segment and the fourth guide core segment; the outer diameter of the fourth guide core segment is greater than the outer diameter of the second guide core segment, the outer diameter of the third guide core segment gradually decreases from a side close to the fourth guide core segment to a side close to the second guide core segment, and the outer diameter of the first guide core segment increases from a side close to the second guide core segment to a side away from the first guide core segment.
  • One side of the second core section gradually decreases;
  • the drainage pipe comprises a drainage pipe transition section, the drainage pipe transition section is connected to the first return pipe section, and both the outer diameter and the inner diameter of the drainage pipe transition section gradually decrease from a side away from the first return pipe section to a side close to the first return pipe section;
  • the first return pipe section has a return pipe head end on a side away from the second return pipe section, and the inner diameter of the return pipe head end gradually decreases from the side close to the second return pipe section to the side away from the second return pipe section;
  • the first core guide section When the core guide is inserted into the double-lumen cannula, the first core guide section partially extends out of the first return tube section, the first clamping portion fits against the inner wall of the return tube head end, and the second clamping portion fits against the inner wall of the drainage tube transition section.
  • the first clamping portion is located at a position on the first core guide segment connected to the second core guide segment, and the second clamping portion is located at a position on the third core guide segment connected to the fourth core guide segment.
  • the fixed portion occupies less than 1/2 of the circumference of the distal end of the second return pipe segment; and the free portion occupies more than 1/2 of the circumference of the distal end of the second return pipe segment.
  • the second return pipe section is a thin-walled deformable flexible tube; the wall thickness of the second return pipe section is smaller than the wall thickness of the first return pipe section; the wall thickness of the second return pipe section is smaller than the wall thickness of the drainage pipe.
  • a drainage joint is provided at the proximal end of the drainage tube, and a reflux joint is provided on the third reflux tube section.
  • a drainage hole is provided on the side wall at the distal end of the drainage pipe, and a reflux hole is provided on the side wall at the distal end of the first reflux pipe section; After cannulation is completed, the drainage hole is located in the inferior vena cava, superior vena cava or right atrium.
  • an outer wall of the first reflux pipe section transitions smoothly with an outer wall of the drainage pipe.
  • the first reflux pipe section and the drainage pipe are integrally formed.
  • a first through hole is provided at the distal end of the drainage tube, and the first reflux pipe section passes through the first through hole and is sealed and connected to the hole wall of the first through hole;
  • a second through hole is provided on the side wall of the proximal end of the drainage tube, the reflux tube passes through the second through hole and extends toward the distal end of the drainage tube, and the drainage tube is sealed and connected to the hole wall of the second through hole.
  • the angle between the second return pipe section and the third return pipe section is greater than°.
  • the second return pipe section and the third return pipe section are integrally formed.
  • a first support body is provided in the tube wall of the first reflux pipe section; the first support body is used to prop open the tube wall of the first reflux pipe section and make the first reflux pipe section bendable;
  • the density of the first support body on the first reflux pipe section away from the drainage pipe is lower than that on the side close to the drainage pipe, and the flexibility of the first reflux pipe section away from the drainage pipe is higher than that on the side close to the drainage pipe.
  • the length of the reflux tube is greater than that of the drainage tube.
  • the reflux tube of the double-lumen cannula passes through the drainage tube, and the second reflux tube section on the reflux tube is partially connected to the first reflux tube section.
  • the guide core passes through the drainage tube and the first reflux tube section, and the second reflux tube section is squeezed to one side. Since the guide core does not need to pass through the second reflux tube section, the second reflux tube section does not need to be adapted to the size of the guide core, and its diameter and wall thickness can be made smaller, thereby reducing the occupation of the drainage cavity cross-sectional area, so that the inner wall of the drainage tube and the second reflux tube The flow cross-sectional area between the outer walls of the segments is larger.
  • FIG1 is a front view of a double-lumen cannula provided in an embodiment of the present application.
  • FIG2 is a right side view of a double lumen cannula provided in an embodiment of the present application.
  • FIG3 is a cross-sectional view of a double-lumen cannula provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a partial structure of the structure shown in FIG3 ;
  • FIG6 is an enlarged view of portion A in FIG5 ;
  • FIG. 7 is a cross-sectional view of a guide core provided in an embodiment of the present application when placed into a double-lumen cannula;
  • FIG8 is a cross-sectional view of a double-lumen cannula after the guide core is withdrawn from the double-lumen cannula provided in an embodiment of the present application;
  • FIG. 9 is a schematic diagram of the structure of the guide core provided in an embodiment of the present application.
  • reflux pipe 200 reflux pipe, 201 first reflux pipe section, 202 second reflux pipe section, 203 third reflux pipe section, 204 fixed portion, 205 free portion, 206 reflux joint, 207 reflux hole, 208 first support body, 209 reflux pipe head end, 210 avoidance channel, 211 flow channel,
  • the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inside”, “outside”, etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.
  • the terms “first”, “second”, “third”, etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.
  • “multiple" means two or more.
  • a first feature being “above” or “below” a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact.
  • the first feature is not directly in contact with the second feature but is in contact through another feature between them.
  • the first feature being “above”, “above” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature being “below”, “below” and “below” the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
  • This embodiment provides a cannula set, including a double-lumen cannula and a guide core 300, which can be inserted into and removed from the double-lumen cannula.
  • the guide core 300 has a structure and size that matches the double-lumen cannula, and is used to assist the double-lumen cannula in being inserted into the body.
  • the double-lumen cannula includes a drainage tube 100 and a return tube 200.
  • the drainage tube 100 has a drainage cavity 101 inside.
  • the return tube 200 passes through the drainage tube 100.
  • the return tube 200 includes a first return tube segment 201, a second return tube segment 202 and a third return tube segment 203.
  • the first return tube segment 201 is exposed at the distal end of the drainage tube 100
  • the third return tube segment 203 is exposed at the proximal end of the drainage tube 100.
  • the second return tube segment 202 is built into the drainage cavity 101, and the two ends of the second return tube segment 202 are respectively connected to the third return tube segment 203 and the first return tube segment 201.
  • the length of the return tube 200 is greater than that of the drainage tube 100.
  • the proximal end of the drainage tube 100 is provided with a drainage joint 102, and the third return tube segment 203 is provided with a return joint 206. 4 and 5 , a drainage hole 104 is provided on the side wall at the distal end of the drainage tube 100, and a reflux hole 207 is provided on the side wall at the distal end of the first reflux tube section 201.
  • a gap 103 is left between the outer wall of the second reflux tube section 202 and the inner wall of the drainage tube 100, allowing venous blood entering from the drainage hole 104 to flow to the drainage connector 102 through the gap 103.
  • the drainage hole 104 on the double-lumen cannula is used to draw venous blood out of the body
  • the return hole 207 is used to return oxygen-rich arterial blood to the body.
  • the positions of the drainage hole 104 and the return hole 207 can be designed according to the specific use site and body size, for example, according to the predetermined position of venous blood and the predetermined position of arterial blood for return. The distance between the positions is changed, and the distance between the drainage hole 104 and the return hole 207 is changed to ensure that the drainage hole 104 and the return hole 207 can be accurately delivered to the designated position.
  • the drainage hole 104 of the double-lumen cannula is located in the inferior vena cava, the superior vena cava or the right atrium, and is used to draw venous blood into the drainage cavity 101 of the double-lumen cannula and lead it to the outside of the body, and then pass through the oxygenator to oxygenate and remove carbon dioxide to become oxygen-rich arterial blood, and finally directly perfuse into the left atrium through the return joint 206, the third return pipe segment 203, the second return pipe segment 202 and the first return pipe segment 201 by the centrifugal pump in sequence, which can reduce the burden on the heart and lungs and is used for cardiopulmonary support.
  • the return hole 207 on the return pipe 200 is located in the left atrium
  • the drainage hole 104 of the drainage tube 100 is located in the right atrium.
  • the first return pipe section 201 is sealed and connected with the drainage tube 100
  • the proximal end of the second return pipe section 202 is sealed and connected with the third return pipe section 203.
  • the distal end of the second return pipe section 202 has a fixed portion 204 and a free portion 205 on the circumference
  • the fixed portion 204 is connected to the first return pipe section 201
  • the free portion 205 has a first state of fitting the inner wall of the second return pipe section 202 and a second state of being away from the inner wall of the second return pipe section 202.
  • the first return pipe section 201, the second return pipe section 202 and the third return pipe section 203 are connected in sequence to form a flow passage 211 for draining arterial blood, as shown in Figure 8.
  • an avoidance channel 210 is formed between the outer wall of the second return pipe section 202 and the inner wall of the first return pipe section 201, allowing the guide core 300 used for the double-lumen cannula to pass through, as shown in Figure 7.
  • the fixed portion 204 accounts for less than 1/2 of the circumference of the distal end of the second return pipe segment 202
  • the free portion 205 accounts for more than 1/2 of the circumference of the distal end of the second return pipe segment 202, so as to ensure that after the deformation of the free portion 205, there is a large enough channel between the outer wall of the second return pipe segment 202 and the inner wall of the first return pipe segment 201 for the guide core 300 to pass through.
  • the fixed portion 204 accounts for 1/3 of the circumference of the distal end of the second return pipe segment 202
  • the free portion 205 accounts for 2/3 of the circumference of the distal end of the second return pipe segment 202
  • the fixed portion 204 is bonded to the inner wall of the second return pipe segment 202.
  • the second return pipe section 202 is a thin-walled deformable flexible tube.
  • the free portion 205 of the second return pipe section 202 can move closer to the fixed portion 204 after being squeezed by the guide core 300.
  • the wall thickness of the second return pipe section 202 is smaller than that of the first return pipe section 201; the wall thickness of the second return pipe section 202 is smaller than that of the drainage tube 100.
  • a first support 208 is provided in the wall of the first return pipe section 201, and the first support 208 is used to prop open the wall of the first return pipe section 201 and make the first return pipe section 201 bendable.
  • a second support 107 is provided in the wall of the drainage pipe 100, and the second support 107 is used to prop open the wall of the drainage pipe 100 and make the drainage pipe 100 bendable.
  • the first support 208 and the second support 107 can be support bodies of a spiral structure or a mesh structure, such as a support spring.
  • the first return pipe section 201 and the drainage tube 100 are to be placed in the body.
  • the first return pipe section 201 and the drainage tube 100 have certain support strength and flexibility, and can reach the predetermined position along the complete blood vessel pipeline.
  • the second return pipe section 202 is built into the drainage cavity 101 and does not need to directly contact the blood vessel wall. In this embodiment, no support body is set in the second return pipe section 202. Under the condition of the same flow cross-sectional area, the wall of the second return pipe section 202 can be made thinner, reducing the cross-sectional area of the return pipe 200 in the drainage cavity 101, and expanding the flow area of venous blood drainage.
  • the density of the first support 208 on the side of the first return pipe section 201 away from the drainage pipe 100 is less than the density of the first support 208 on the side close to the drainage pipe 100, and the flexibility of the side of the first return pipe section 201 away from the drainage pipe 100 is greater than the flexibility of the side close to the drainage pipe 100.
  • the density of the second support 107 at different positions on the second return pipe section 202 is adjusted so that different positions of the second return pipe section 202 correspond to different bending strengths, and the denser the second support 107, the greater the bending strength.
  • relatively sparse springs are set on the second return pipe segment 202 away from the drainage tube 100, and relatively dense springs are set on the second return pipe segment 202 close to the drainage tube 100. Then, the bending strength of the second return pipe segment 202 close to the drainage tube 100 is greater than the bending strength of the second return pipe segment 202 away from the drainage tube 100. In this way, the distal end of the second return pipe segment 202 can be made more flexible, reducing the difficulty of placing the distal end of the second return pipe segment 202 through the tricuspid valve and the pulmonary valve.
  • the outer diameter of the first return pipe section 201 is smaller than the outer diameter of the drainage tube 100 .
  • the first return pipe section 201 is the head end of the entire double-lumen cannula. Reducing the outer diameter of the first return pipe section 201 is conducive to its smooth passage in the blood vessel.
  • the arterial The pressure during blood delivery is relatively high, and even if the outer diameter and inner diameter are reduced, arterial blood can flow smoothly in the first return tube segment 201; on the other hand, reducing the outer diameter of the first return tube segment 201 can also reduce the trauma to tissues such as the blood vessel wall and heart valves during the insertion process.
  • the outer wall of the first reflux tube section 201 transitions smoothly with the outer wall of the drainage tube 100 , and there is no step surface at the distal joint of the reflux tube 200 and the drainage tube 100 , so that the blood vessel wall will not be damaged when the cannula is inserted into the blood vessel.
  • the distal end of the drainage tube 100 is provided with a first through hole 105, and the first return pipe section 201 passes through the first through hole 105 and is sealed and connected to the hole wall of the first through hole 105.
  • the first return pipe section 201 and the drainage tube 100 are integrally formed.
  • a second through hole 106 is also provided on the side wall of the proximal end of the drainage tube 100.
  • the reflux tube 200 extends through the second through hole 106 to the distal end of the drainage tube 100, and the drainage tube 100 is sealed and connected to the hole wall of the second through hole 106.
  • the angle between the second reflux tube section 202 and the third reflux tube section 203 is greater than 90°.
  • the reflux tube 200 is inclined at a certain angle to penetrate the drainage cavity 101 to prevent the blood from turning rapidly in the reflux tube 200 and causing damage to blood cells.
  • the second reflux tube section 202 and the third reflux tube section 203 are integrally formed.
  • the second reflux tube section 202 and the third reflux tube section 203 can also be separately formed and then sealed and connected.
  • the double-lumen cannula provided by the present invention has both a drainage tube 100 and a return tube 200.
  • the drainage tube 100 and the return tube 200 are integrated into a single tube. When used, only one puncture hole needs to be formed on the body surface. The risk of bleeding infection is significantly reduced compared with the conventional method of forming two puncture holes on the body surface.
  • the second return tube section 202 is partially connected to the first return tube section 201.
  • the guide core 300 penetrates the drainage tube 100 and the first return tube section 201, and the second return tube section 202 is squeezed to one side. Since the guide core 300 does not need to pass through the second return tube section 202, the second return tube section 202 does not need to adapt to the size of the guide core 300. Its diameter and wall thickness can be made smaller, reducing the cross-sectional area occupied by the drainage cavity 101, so that the flow cross-sectional area between the inner wall of the drainage tube 100 and the outer wall of the second return tube section 202 is larger.
  • the present invention expands the cross-sectional area of the return tube 200 in the drainage cavity 101 by reducing the cross-sectional area of the return tube 200.
  • the flow area of venous blood drainage ensures that both the drainage tube 100 and the return tube 200 have sufficient flow cross-sectional area to ensure the drainage and return effect.
  • the guide core 300 has a guide core through hole 301 that runs through both ends of the guide core 300.
  • the guide core through hole 301 is used to pass the guide wire 400.
  • the guide core through hole 301 includes a docking channel 308.
  • the diameter of the docking channel 308 matches the diameter of the guide wire 400.
  • the diameter of the docking channel 308 is slightly larger than the diameter of the guide wire 400, or the diameter of the docking channel 308 is equal to the diameter of the guide wire 400.
  • the outer wall of the guide core 300 has a clamping portion. When the guide core 300 is placed in the double-lumen cannula, the clamping portion fits with the inner wall of the drainage cavity 101 and/or the inner wall of the first reflux pipe section 201.
  • the core guide 300 includes a first core guide segment 302, a second core guide segment 303, a third core guide segment 304 and a fourth core guide segment 305 which are connected in sequence, and the core guide through hole 301 passes through the first core guide segment 302, the second core guide segment 303, the third core guide segment 304 and the fourth core guide segment 305.
  • the outer diameter of the fourth core guide segment 305 is greater than the outer diameter of the second core guide segment 303, the outer diameter of the third core guide segment 304 gradually decreases from the side close to the fourth core guide segment 305 to the side close to the second core guide segment 303, and the outer diameter of the first core guide segment 302 gradually decreases from the side close to the second core guide segment 303 to the side away from the second core guide segment 303.
  • the docking channel 308 is provided in the first core guide segment.
  • the clamping portion includes a first clamping portion 306 and a second clamping portion 307, wherein the first clamping portion 306 is disposed on the first core guide segment 302, and the second clamping portion 307 is disposed on the third core guide segment 304.
  • the first clamping portion 306 may be located at a position on the first core guide segment 302 connected to the second core guide segment 303, and the second clamping portion 307 may be located at a position on the third core guide segment 304 connected to the fourth core guide segment 305.
  • the drainage pipe includes a drainage pipe transition section 108, the drainage pipe transition section 108 is connected to the first return pipe section 201, and the outer diameter and the inner diameter of the drainage pipe transition section 108 are gradually reduced from the side away from the first return pipe section 201 to the side close to the first return pipe section 201.
  • the first return pipe section 201 has a return pipe head end 209 on the side away from the second return pipe section 202, and the inner diameter of the return pipe head end 209 increases from the side close to the second return pipe section 202 to the side close to the second return pipe section 202.
  • the first side of the first core guide segment 302 gradually decreases toward the side away from the second return pipe segment 202.
  • the first core guide segment 302 When the core guide 300 is inserted into the double-lumen cannula, the first core guide segment 302 partially extends out of the first return pipe segment 201, the first clamping portion 306 fits the inner wall of the return pipe head end, and the second clamping portion 307 fits the inner wall of the drainage tube transition section to position the core guide 300 in the double-lumen cannula.
  • the fitting surface between the core guide 300 and the double-lumen cannula should not be too large. If the fitting surface is too large, the friction between the double-lumen cannula and the core guide 300 will increase, which is not conducive to the withdrawal of the core guide 300.
  • the guide core 300 is passed through the drainage joint 102, the drainage cavity 101 and the first return pipe section 201 in sequence. At this time, the guide core 300 squeezes the second return pipe section 303 to one side, and the front end of the first guide core section 302 of the guide core 300 passes through the first return pipe section 201, and the first clamping portion 306 at the rear end of the first guide core section 302 fits with the inner wall of the return pipe head end 209 on the first return pipe section 201, and the second clamping portion 307 on the third guide core section 304 fits with the inner wall of the drainage pipe transition section 108.
  • the first guide core segment 302 is at the head end of the guide core 300
  • the fourth guide core segment 305 is at the tail end of the guide core 300.
  • the guide core 300 moves along the direction indicated by the head end, the guide core 300 is always sleeved in the double-lumen cannula and can drive the double-lumen cannula to move.
  • the guide core 300 moves along the direction indicated by the tail end, the guide core 300 can withdraw from the double-lumen cannula.
  • the head end of the guide wire 400 is sent into a designated position (such as the left atrium) along the blood vessel through the puncture hole on the body surface, and the tail end of the guide wire 400 is exposed outside the body surface.
  • the second return tube section 303 can Under the impact of arterial blood, the outer wall of the second return pipe 303 is stretched to be close to the inner wall of the first return pipe section 201 to form an arterial blood flow channel 211, ensuring that the arterial blood flows out of the return hole 207 smoothly.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
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  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • External Artificial Organs (AREA)

Abstract

L'invention concerne un kit de canule, comprenant une canule à double lumière et un noyau de guidage (300) qui peut être inséré dans la canule à double lumière et retiré de celle-ci. La canule à double lumière comprend un tube de drainage (100) et un tube de reflux (200). Le tube de drainage (100) est pourvu d'une lumière de drainage (101). Le tube de reflux (200) passe à travers le tube de drainage (100) et comprend une première section de tube de reflux (201) exposée à l'extrémité distale du tube de drainage (100), une deuxième section de tube de reflux (202) agencée dans la lumière de drainage (101) et une troisième section de tube de reflux (203) exposée à l'extrémité proximale du tube de drainage (100). Une partie fixe (204) et une partie libre (205) sont disposées dans la direction circonférentielle de l'extrémité distale de la deuxième section de tube de reflux (202). La partie fixe (204) est reliée à la première section de tube de reflux (201). La partie libre (205) peut être fixée à la paroi interne de la deuxième section de tube de reflux (202) ou séparée de celle-ci. Lorsque le noyau de guidage (300) est inséré dans la canule à double lumière, la partie libre (205) est séparée de la paroi interne de la deuxième section de tube de reflux (202), et le noyau de guidage (300) passe à travers un canal de dégagement (210) entre la paroi externe de la deuxième section de tube de reflux (202) et la paroi interne de la première section de tube de reflux (201). Une fois que le noyau de guidage (300) est retiré de la canule à double lumière, la partie libre (205) est fixée à la paroi interne de la deuxième section de tube de reflux (202). En utilisant le kit de canule, l'aire de la section transversale de flux du tube de drainage est augmentée, et les effets de drainage et de reflux sont garantis.
PCT/CN2023/130448 2023-08-28 2023-11-08 Kit de canule Pending WO2025043884A1 (fr)

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CN202311085104.2 2023-08-28
CN202311085104.2A CN116899086A (zh) 2023-08-28 2023-08-28 插管套装

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WO2025043884A1 true WO2025043884A1 (fr) 2025-03-06

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PCT/CN2023/130448 Pending WO2025043884A1 (fr) 2023-08-28 2023-11-08 Kit de canule

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WO (1) WO2025043884A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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CN116899086A (zh) * 2023-08-28 2023-10-20 江苏赛腾医疗科技有限公司 插管套装

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CN219251156U (zh) * 2022-09-26 2023-06-27 上海宏创医疗科技有限公司 血液导流用双腔插管
CN116870340A (zh) * 2023-08-28 2023-10-13 江苏赛腾医疗科技有限公司 双腔插管
CN116899086A (zh) * 2023-08-28 2023-10-20 江苏赛腾医疗科技有限公司 插管套装

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US5106368A (en) * 1990-04-20 1992-04-21 Cook Incorporated Collapsible lumen catheter for extracorporeal treatment
EP0472105A1 (fr) * 1990-08-24 1992-02-26 David F. Markel Cathéter avec deux lumières coaxiales
US20130158338A1 (en) * 2011-12-19 2013-06-20 Cardiacassist, Inc. Dual Lumen Cannula
CN218774140U (zh) * 2022-07-07 2023-03-31 中国医学科学院阜外医院深圳医院(深圳市孙逸仙心血管医院) 一种经外周植入心室辅助系统的单根双腔插管
CN115350349A (zh) * 2022-08-23 2022-11-18 北京航空航天大学 一种ecmo双腔插管
CN219251156U (zh) * 2022-09-26 2023-06-27 上海宏创医疗科技有限公司 血液导流用双腔插管
CN116271298A (zh) * 2023-03-18 2023-06-23 中国人民解放军空军军医大学 一种房间隔穿刺双腔va-ecmo插管
CN116870340A (zh) * 2023-08-28 2023-10-13 江苏赛腾医疗科技有限公司 双腔插管
CN116899086A (zh) * 2023-08-28 2023-10-20 江苏赛腾医疗科技有限公司 插管套装

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