WO2024159664A1 - Negative-pressure aspiration sheath with adjustable stiffness, insertion portion, and endoscope - Google Patents
Negative-pressure aspiration sheath with adjustable stiffness, insertion portion, and endoscope Download PDFInfo
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- WO2024159664A1 WO2024159664A1 PCT/CN2023/096800 CN2023096800W WO2024159664A1 WO 2024159664 A1 WO2024159664 A1 WO 2024159664A1 CN 2023096800 W CN2023096800 W CN 2023096800W WO 2024159664 A1 WO2024159664 A1 WO 2024159664A1
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- Prior art keywords
- tube
- sheath
- stiffness
- sheath tube
- distal
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
Definitions
- the invention belongs to the technical field of endoscopes and relates to a negative pressure suction sheath with adjustable stiffness, an insertion part and an endoscope.
- An endoscope is a device that detects the body cavity environment by extending an insertion portion with at least lighting and photographing functions into a natural channel of the human body or an opening in the surgical area. By operating a handle located outside the human body, the bending angle of the active bending section 12 located at the front end of the endoscope insertion portion is adjusted to deflect it in a predetermined direction, thereby helping people obtain observations with a larger visual angle range.
- an endoscope with a flexible insertion portion when entering the human body through a natural cavity, it is usually necessary to use an endoscope with a flexible insertion portion, and the active bending section 12 at the distal end of the insertion portion is controllably bent so that the lighting unit and the image processing unit can be introduced into the curved cavity of the human body; however, in the scenario of introducing the endoscope into the human body through an opening in the surgical area, an endoscope with a rigid insertion portion is currently used for operation.
- the disadvantage is that the distal end of the insertion portion cannot be turned autonomously, and the viewing angle of the surgical field can only be adjusted by rotating the rigid insertion portion, which limits the doctor's operating field of view and makes it difficult to perform surgical operations on the surgical area within a larger range; and if the rigid insertion portion is forcibly rotated, it is easy to tear human tissue, thereby increasing trauma to the patient.
- the object of the present invention is to provide a negative pressure suction sheath with adjustable stiffness, comprising:
- a sheath tube wherein the sheath tube is provided with a lumen for installing an endoscope insertion portion along its axial direction, and a suction channel is provided along the length direction of the sheath tube, the suction channel passes through the distal end of the sheath tube, extends toward the proximal end of the sheath tube and is connected to a suction nozzle;
- the sheath tube is provided with a receiving channel along the axial direction, and the receiving channel extends from the proximal region of the sheath tube to the distal region of the sheath tube; the distal tube section of the sheath tube is flexible and can be bent under the action of an external force;
- a stiffness adjustment rod wherein the stiffness adjustment rod is movably installed in the accommodating channel along the axial direction of the sheath tube; the stiffness adjustment rod has a preset bending stiffness, and when the stiffness adjustment rod is extended into the accommodating channel surrounded by the distal tube section of the sheath tube, the preset bending stiffness satisfies that when the distal tube section of the sheath tube is subjected to external force, it cannot be bent.
- the distal tube section of the sheath tube comprises:
- An outer tube, an inner tube and a connecting rib wherein the outer tube is sleeved on the outer side of the inner tube, and the connecting rib is arranged along the axial direction of the sheath tube and fixed between the inner tube and the outer tube;
- the inner annular space of the inner tube is used to accommodate the active bending section 12 of the endoscope insertion portion
- the spaced area between the inner tube and the outer tube forms the suction channel.
- the connecting ribs are symmetrically distributed on both sides of the inner tube, so that the bending stiffness of the distal tube section in the normal direction of the plane formed by the axis lines of the two symmetrically distributed connecting ribs is smaller than the bending stiffness in any direction in the plane.
- the bending stiffness of the stiffness adjustment rod in the normal direction of the plane is greater than Bending stiffness in any direction within the plane.
- the accommodating channel is opened in the connecting rib along the axial direction of the sheath tube, the distal end of the accommodating channel terminates at the distal end region of the connecting rib, and the connecting rib forms a stopper at the distal end of the accommodating channel for abutting the stiffness adjustment rod.
- an exhaust hole is formed through the distal end of the connecting rib, and the exhaust hole is communicated with the accommodating channel.
- a traction portion is connected to the proximal end of the stiffness adjustment rod, the traction portion is connected to the stiffness adjustment rod via a connecting rod, and the traction portion is sleeved on the outside of the sheath tube;
- a accommodating groove is formed on the side wall of the proximal end region of the sheath tube along its axial direction, the accommodating groove is connected to the accommodating channel, and the connecting rod is accommodated in the accommodating groove.
- the present invention further provides an endoscope insertion portion, comprising:
- the insertion tube comprises an active bending section 12, the active bending section 12 is located in the distal region of the insertion tube, and the active bending section 12 is accommodated in the lumen of the distal section of the sheath tube, and the rear end of the sheath tube is sealed and connected to the proximal end of the insertion tube.
- the pivot axis of the active bending section 12 is coplanar with the axis of the stiffness adjustment rod.
- the present invention also provides an endoscope, comprising the endoscope insertion portion described above.
- the rigidity of the distal end of the sheath is adjusted by a rigidity adjustment rod.
- Section or switch specifically, when the stiffness adjusting rod moves to the area of the distal tube segment along the axial direction of the accommodating channel, the rigidity of the distal tube segment can be enhanced.
- the distal end of the complex of the sheath tube and the endoscope insertion part has strong rigidity and is not easy to be bent.
- the doctor can insert the complex of the sheath tube and the endoscope insertion part into the target position of the human surgical area. During the insertion process, the compression of the human tissue is not enough to make the complex of the sheath tube and the endoscope insertion part bend, thereby retaining the advantages of the rigid endoscope during the insertion process.
- the doctor when the complex of the sheath and the insertion part of the endoscope reaches the target surgical area, if the distal end of the complex needs to be bent at this time to help the doctor obtain a larger field of view of the surgical area, or to help the doctor place treatment instruments, such as biopsy forceps, into the target position, the doctor does not need to turn the rigid complex of the sheath and the insertion part of the endoscope to adjust the viewing angle. Instead, the doctor only needs to move the stiffness adjustment rod toward the proximal end of the insertion part so that the stiffness adjustment rod is not located in the distal tube section area of the sheath, thereby reducing the rigidity of the distal tube section of the sheath.
- the distal tube section after the rigidity is reduced can bend synchronously toward the bending direction of the active bending section 12 through the bending of the active bending section 12 of the endoscope, thereby helping the doctor obtain a larger field of view of the surgical area.
- the active bending section 12 when the operator controls the active bending section 12 to bend, only a portion of the distal tube section of the sheath is bent, and the other portion cannot be bent. At this time, the bending angle presented by the active bending section 12 is smaller than the bending angle at its original length, and the bending state at this bending angle can be stably maintained.
- FIG1 is a schematic diagram of a first structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention
- FIG2 is a schematic diagram of a second structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention
- FIG. 3 is a schematic diagram of the third structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention and a schematic diagram of a partial enlarged structure of a distal tube segment B region;
- FIG. 4 is a schematic diagram of the structure of the coupling connection between the negative pressure suction sheath with adjustable stiffness and the endoscope insertion portion provided by an embodiment of the present invention, and a partial enlarged cross-sectional schematic diagram of region A;
- FIG. 5 is a first schematic diagram of a cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention, and a partial enlarged schematic diagram of region C;
- FIG. 6 is a schematic diagram of the structure of the coupling connection between the negative pressure suction sheath with adjustable stiffness and the endoscope insertion portion provided by an embodiment of the present invention, and a partial enlarged cross-sectional schematic diagram of the E region;
- FIG. 7 is a second schematic diagram of the cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided in an embodiment of the present invention.
- FIG. 8 is a third schematic diagram of the cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided in an embodiment of the present invention, and a partial enlarged schematic diagram of the D region.
- the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense.
- it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be two-way connection.
- the connection within an element or the interaction relationship between two elements can be understood according to the specific circumstances.
- the terms “first”, “second”, “third”, etc. are only used to distinguish and describe, and cannot be understood as indicating or implying relative importance.
- a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them.
- a first feature being above, above, and above a 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.
- a first feature being below, below, and below a 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.
- proximal end and distal end refer to the far and near positions of the structure relative to human operation in the use environment, so as to facilitate the description of the positional relationship between components and facilitate understanding; for the same component, “proximal end” and “distal end” are the relative positional relationship of the component, not absolute; therefore, it should be understood from the perspective of realizing the principles of the present invention, and should not deviate from the essence of the present invention.
- the present invention provides a negative pressure suction sheath with adjustable stiffness, comprising:
- the sheath tube 20 is installed on the outer periphery of the insertion part of the endoscope to wrap the insertion part of the endoscope, as shown in Figure 4; specifically, please refer to Figures 1 to 3, the sheath tube 20 is provided with a lumen 20b for installing the insertion part of the endoscope along its axial direction, and a suction channel 20a is provided along the length direction of the sheath tube 20, the suction channel 20a runs through the distal end of the sheath tube 20 and extends to the proximal end of the sheath tube 20, and the suction channel 20a is connected to a suction nozzle 25, and by connecting the suction nozzle 25 to a negative pressure mechanism, the material to be sucked can be transferred from the distal end of the suction channel 20a to the proximal end and extracted from the suction nozzle 25.
- the proximal end of the sheath tube 20 is provided with a connecting portion 24, and the connecting portion 24 can be sealed and installed to the proxi
- the sheath 20 is provided with a accommodating channel 230 along the axial direction, and the accommodating channel 230 extends from the proximal area of the sheath 20 to the distal area of the sheath 20; the distal tube section 21 of the sheath 20 is flexible and can be bent under the action of external force; it can be understood that when the active bending section 12 of the endoscope is controlled to bend, the bending force of the active bending section 12 can force the distal tube section 21 of the sheath 20 to bend in the bending direction of the active bending section 12, thereby realizing that the sheath 20 is driven by the active bending section 12 to bend in different directions, thereby covering a larger surgical field area; wherein the active bending section 12 is a prior art, such as the riveted snake bone joint 120 shown in the embodiment of Figure 4, or any other existing controllable bending structure that can realize the bending function.
- the active bending section 12 is a prior art, such as the riveted snake bone joint 120 shown in the embodiment of Figure 4,
- the present negative pressure suction sheath further comprises: a stiffness adjustment rod 31, which moves along the axial direction of the sheath tube 20. Installed in the accommodating channel 230; the stiffness adjustment rod 31 has a preset bending stiffness. When the stiffness adjustment rod 31 extends into the accommodating channel 230 surrounded by the distal tube section 21 of the sheath tube 20, the preset bending stiffness satisfies that when the distal tube section 21 of the sheath tube 20 is subjected to external force, it cannot be bent. In the present invention, the rigidity of the distal tube segment 21 of the sheath tube 20 is adjusted or switched by the rigidity adjustment rod 31.
- the rigidity adjustment rod 31 moves to the area of the distal tube segment 21 along the axial direction of the accommodating channel 230, the rigidity of the distal tube segment 21 can be enhanced.
- the distal end of the complex of the sheath tube 20 and the endoscope insertion part has strong rigidity and is not easy to bend. The doctor can insert the complex of the sheath tube 20 and the endoscope insertion part into the target position of the human surgical area.
- the compression of human tissue is not enough to make the complex of the sheath tube 20 and the endoscope insertion part bend, thereby retaining the advantages of the rigid endoscope during the insertion process; however, when the complex of the sheath tube 20 and the endoscope insertion part reaches the target surgical area After the operation, if the distal end of the complex needs to be bent to help the doctor obtain a larger field of view of the surgical area, or to help the doctor place treatment instruments, such as biopsy forceps, at the target position, the doctor does not need to turn the rigid complex of the sheath 20 and the insertion part of the endoscope to adjust the viewing angle.
- the doctor only needs to move the stiffness adjustment rod 31 toward the proximal end of the insertion part so that the stiffness adjustment rod 31 is not located in the distal tube segment 21 area of the sheath 20, thereby reducing the rigidity of the distal tube segment 21 of the sheath 20.
- the distal tube segment 21 after the rigidity is reduced can bend synchronously toward the bending direction of the active bending segment 12 through the bending of the active bending segment 12 of the endoscope, thereby helping the doctor obtain a larger field of view of the surgical area.
- the distal end of the stiffness adjustment rod 31 may terminate at any position in the accommodating channel 230.
- the stiffness adjustment rod 31 can be partially accommodated in the area where the active bending section 12 of the endoscope insertion part is set, so that the distal tube section 21 has two stiffnesses.
- the adaptation length of the sheath 20 and the active bending section 12 is L1+L2, wherein the distal end surface 31a of the stiffness adjustment rod 31 terminates at a position L1 away from the distal end of the sheath 20.
- the length of the active bending section 12 covered by the accommodation position of the stiffness adjustment rod 31 is L2. Therefore, it can be understood that the active bending section 12 can only be controllably bent in the tube section area located at L1 without being restricted by the stiffness adjustment rod 31; however, the active bending section 12 located in the tube section area L2 is controlled by the restriction of the stiffness adjustment rod 31 and cannot be controllably bent; therefore, the result of the bending state can be specifically manifested as, when the operator controls the active bending section 12 to bend, only a part of the distal tube section 21 of the sheath 20 is bent, and the other parts cannot be bent.
- the bending angle presented by the active bending section 12 is smaller than the bending angle at its original length, and the bending state at this bending angle can be stably maintained; its advantage is that in conventional operation, the operator needs to controllably bend the active bending section 12 to a certain angle and maintain it during use.
- the active bending section 12 is bent to any middle angle within its bendable range, its support can only be maintained at a predetermined position by the traction rope that controls its bending. Therefore, its stability is difficult to ensure, wherein the movement of the traction rope is controlled by moving the lever on the handle 10, and its structure is prior art and will not be elaborated here.
- the traction rope can continue to be pulled when the bending limit is reached.
- the active bending section 12 located in the pipe section area L1 will not continue to bend, but will stably maintain the angle of the bending state, which is difficult to change even under the action of external force.
- the distal end tube section 21 of the sheath tube 20 includes:
- the length of the inner tube 233 is adapted to the length of the active bending section 12, the distal end 233a of the inner tube 233 is flush with the distal end surface of the endoscope insertion part, and the proximal end 233b of the inner tube 233 terminates near the proximal end of the active bending section 12; of course, the proximal end 233b of the inner tube 233 may also extend to the proximal end of the sheath 20, but it will not hinder the connection between the suction channel 20a and the suction nozzle 25.
- the spacing area between the inner tube 233 and the outer tube 23 forms the suction channel 20a.
- the suction channel 20a is connected to the suction nozzle 25.
- a negative pressure mechanism is connected to the suction nozzle 25. Through the suction effect of the negative pressure mechanism, the fluid f enters from the suction channel 20a and then leaves from the suction nozzle 25 through the dotted line in Figure 8.
- the connecting ribs 231 are symmetrically distributed on both sides of the inner tube 233, so that the bending stiffness of the distal tube section 21 in the normal direction of the plane formed by the axis lines of the two symmetrically distributed connecting ribs 231 is smaller than the bending stiffness in any direction in the plane.
- the sheath tube 20 when the sheath tube 20 is subjected to a force in any direction of the plane formed by the two connecting ribs 231, it is difficult to bend the sheath tube 20.
- the sheath tube 20 can be bent. In this way, the sheath tube 20 shows different degrees of difficulty in being forced to bend in different directions.
- the advantage is that when the active bending section 12 drives the sheath tube 20 to bend , the bending direction of the sheath 20 is synchronized with the bending direction of the active bending section 12, thereby ensuring the bending stability of the active bending section 12; it should be noted that in order to achieve a synchronous bending direction between the sheath 20 and the active bending section 12, when the active bending section 12 is installed in coordination with the sheath 20, the pivot axis p of the active bending section 12 is required to be coplanar with the axial center line (a1, a2) of the stiffness adjustment rod 31, as shown in FIG4 .
- the bending stiffness of the stiffness adjustment rod 31 in the normal direction q of the plane is greater than the bending stiffness in any direction within the plane, and the plane refers to the plane formed by the center lines of the two connecting ribs 231; in other words, when the stiffness adjustment rod 31 moves to the distal tube section 21 of the sheath tube 20, the easy bending property of the sheath tube 20 in a predetermined direction is restricted by the stiffness adjustment rod 31, and the sheath tube 20 becomes a rigid tube and cannot be bent at this time.
- the accommodating channel 230 is provided in the connecting rib 231 along the axial direction of the sheath tube 20, the distal end of the accommodating channel 230 terminates at the distal region of the connecting rib 231, and the connecting rib 231 forms a stopper 230a at the distal end of the accommodating channel 230, which is used to abut against the distal end surface 31a of the stiffness adjustment rod 31, and similarly, a second stopper 230b can also be provided at the proximal end of the accommodating channel 230, which is used to limit the proximal end of the stiffness adjustment rod 31.
- an exhaust hole 232 is provided through the distal end of the connecting rib 231, and the exhaust hole 232 is connected to the accommodating channel 230.
- the stiffness adjustment rod 31 moves from the distal tube section 21 of the sheath tube 20 toward the proximal end of the sheath tube 20, the stiffness adjustment rod 31 is compressed along the axial direction.
- the rib 231 moves, the volume of the accommodating space increases, thereby reducing the pressure in the space, thereby pulling the stiffness adjustment rod 31 and hindering its movement. Therefore, the purpose of opening the exhaust hole 232 at the far end of the connecting rib 231 is to balance the air pressure in the accommodating space and ensure smooth movement of the stiffness adjustment rod 31.
- the proximal end of the stiffness adjustment rod 31 is connected to a traction portion 33, and the traction portion 33 is connected to the stiffness adjustment rod 31 through a connecting rod 331.
- the traction portion 33 is sleeved on the outside of the sheath 20.
- an operating portion 32 can also be provided on the outside of the traction portion 33. The operating portion 32 is used to facilitate the operator to push the stiffness adjustment rod 31, wherein the structure and shape of the operating portion 32 are not specifically limited.
- a accommodating groove 26 is formed on the side wall of the proximal region of the sheath tube 20 along its axial direction.
- the accommodating groove 26 is connected to the accommodating channel 230 , and the connecting rod 331 is accommodated in the accommodating groove 26 .
- the present invention further provides an endoscope insertion portion, comprising:
- the sheath tube 20 and
- the insertion tube includes an active bending section 12, which is located in the distal region of the insertion tube, and the active bending section 12 is accommodated in the lumen 20b of the distal section 21 of the sheath tube 20, and the rear end of the sheath tube 20 is sealed and connected to the proximal end of the insertion tube.
- the pivot axis of the active bending section 12 is coplanar with the axis of the stiffness adjustment rod 31 .
- the present invention also provides an endoscope, comprising the endoscope insertion portion described above.
- the endoscope in the embodiments of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.
- the embodiments of the present application do not specifically limit the type of endoscope.
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Abstract
Description
本发明属于内窥镜技术领域，涉及一种可调节刚度的负压吸引鞘、插入部及内窥镜。The invention belongs to the technical field of endoscopes and relates to a negative pressure suction sheath with adjustable stiffness, an insertion part and an endoscope.
内窥镜是一种通过将具有至少照明、拍摄功能的插入部伸入至人体的自然通道或者术区开孔中，进行人体的体腔环境探测，通过操作位于人体外部的手柄，对位于内窥镜插入部前端的主动弯曲段12分进行弯曲角度调节，从而使其在预定的方向进行偏转，帮助人们获取更大可视角度范围的观察。An endoscope is a device that detects the body cavity environment by extending an insertion portion with at least lighting and photographing functions into a natural channel of the human body or an opening in the surgical area. By operating a handle located outside the human body, the bending angle of the active bending section 12 located at the front end of the endoscope insertion portion is adjusted to deflect it in a predetermined direction, thereby helping people obtain observations with a larger visual angle range.
其中，经自然腔道进入人体时通常需要采用柔性插入部的内窥镜，通过对插入部远端的主动弯曲段12进行可控弯曲，以便将照明单元和图像处理单元介入到人体的弯曲腔道中；然而经术区开孔的方式将内窥镜介入到人体的场景下，目前均采用硬质插入部的内窥镜进行操作，其弊端是插入部的远端不能进行自主控制转弯，仅可通过转动硬质插入部来调节术野区域的视角，导致医生的操作视野受限，难以在较大范围内对术区进行手术操作；并且如若强制转动硬质插入部，容易撕裂人体组织，从而对患者的创伤增加。 Among them, when entering the human body through a natural cavity, it is usually necessary to use an endoscope with a flexible insertion portion, and the active bending section 12 at the distal end of the insertion portion is controllably bent so that the lighting unit and the image processing unit can be introduced into the curved cavity of the human body; however, in the scenario of introducing the endoscope into the human body through an opening in the surgical area, an endoscope with a rigid insertion portion is currently used for operation. The disadvantage is that the distal end of the insertion portion cannot be turned autonomously, and the viewing angle of the surgical field can only be adjusted by rotating the rigid insertion portion, which limits the doctor's operating field of view and makes it difficult to perform surgical operations on the surgical area within a larger range; and if the rigid insertion portion is forcibly rotated, it is easy to tear human tissue, thereby increasing trauma to the patient.
发明内容Summary of the invention
本发明的目的是提供一种可调节刚度的负压吸引鞘，包括：The object of the present invention is to provide a negative pressure suction sheath with adjustable stiffness, comprising:
鞘管，所述鞘管沿其轴向开设有用于安装内窥镜插入部的管腔，并且沿所述鞘管的长度方向开设有吸引通道，所述吸引通道贯穿所述鞘管的远端，并向所述鞘管的近端延申且连通一吸引嘴；A sheath tube, wherein the sheath tube is provided with a lumen for installing an endoscope insertion portion along its axial direction, and a suction channel is provided along the length direction of the sheath tube, the suction channel passes through the distal end of the sheath tube, extends toward the proximal end of the sheath tube and is connected to a suction nozzle;
所述鞘管沿轴线方向开设有容置通道，所述容置通道从所述鞘管的近端区域延申至所述鞘管的远端区域；所述鞘管的远端管段具有挠性，在外力作用下可被弯曲；The sheath tube is provided with a receiving channel along the axial direction, and the receiving channel extends from the proximal region of the sheath tube to the distal region of the sheath tube; the distal tube section of the sheath tube is flexible and can be bent under the action of an external force;
刚度调节杆，所述刚度调节杆沿所述鞘管的轴向方向活动安装于所述容置通道内；所述刚度调节杆具有预设抗弯刚度，当所述刚度调节杆伸入至所述鞘管的远端管段所包围的容置通道时，所述预设抗弯刚度满足当所述鞘管的远端管段受到外力作用时，不可被弯曲。A stiffness adjustment rod, wherein the stiffness adjustment rod is movably installed in the accommodating channel along the axial direction of the sheath tube; the stiffness adjustment rod has a preset bending stiffness, and when the stiffness adjustment rod is extended into the accommodating channel surrounded by the distal tube section of the sheath tube, the preset bending stiffness satisfies that when the distal tube section of the sheath tube is subjected to external force, it cannot be bent.
优选地，所述鞘管的远端管段包括：Preferably, the distal tube section of the sheath tube comprises:
外管、内管以及连接肋，所述外管套设在所述内管的外侧，所述连接肋沿所述鞘管的轴向设置，并固定于所述内管与外管之间；An outer tube, an inner tube and a connecting rib, wherein the outer tube is sleeved on the outer side of the inner tube, and the connecting rib is arranged along the axial direction of the sheath tube and fixed between the inner tube and the outer tube;
所述内管的内环空间用于容置所述内窥镜插入部的主动弯曲段12；The inner annular space of the inner tube is used to accommodate the active bending section 12 of the endoscope insertion portion;
所述内管与外管之间的间隔区域形成所述吸引通道。The spaced area between the inner tube and the outer tube forms the suction channel.
优选地，所述连接肋对称分布于所述内管的两侧，使得所述远端管段在对称分布的两个连接肋的轴心线所形成平面的法线方向的抗弯刚度小于所述平面内任意方向的抗弯刚度。Preferably, the connecting ribs are symmetrically distributed on both sides of the inner tube, so that the bending stiffness of the distal tube section in the normal direction of the plane formed by the axis lines of the two symmetrically distributed connecting ribs is smaller than the bending stiffness in any direction in the plane.
优选地，所述刚度调节杆在所述平面的法线方向的抗弯刚度大于 所述平面内任意方向的抗弯刚度。Preferably, the bending stiffness of the stiffness adjustment rod in the normal direction of the plane is greater than Bending stiffness in any direction within the plane.
优选地，所述连接肋内沿所述鞘管的轴向开设所述容置通道，所述容置通道的远端终止于所述连接肋的远端区域，并且所述连接肋在所述容置通道的远端形成止挡部，用于抵接所述刚度调节杆。Preferably, the accommodating channel is opened in the connecting rib along the axial direction of the sheath tube, the distal end of the accommodating channel terminates at the distal end region of the connecting rib, and the connecting rib forms a stopper at the distal end of the accommodating channel for abutting the stiffness adjustment rod.
优选地，所述连接肋的远端贯穿开设有排气孔，所述排气孔与所述容置通道连通。Preferably, an exhaust hole is formed through the distal end of the connecting rib, and the exhaust hole is communicated with the accommodating channel.
优选地，所述刚度调节杆的近端连接有牵引部，所述牵引部通过一连杆与所述刚度调节杆连接，所述牵引部套设于所述鞘管的外侧；Preferably, a traction portion is connected to the proximal end of the stiffness adjustment rod, the traction portion is connected to the stiffness adjustment rod via a connecting rod, and the traction portion is sleeved on the outside of the sheath tube;
所述鞘管的近端区域侧壁沿其轴向方向开设有容置槽，所述容置槽连通所述容置通道，并且所述连杆容置于所述容置槽内。A accommodating groove is formed on the side wall of the proximal end region of the sheath tube along its axial direction, the accommodating groove is connected to the accommodating channel, and the connecting rod is accommodated in the accommodating groove.
本发明又提供了一种内窥镜插入部，包括：The present invention further provides an endoscope insertion portion, comprising:
上述的鞘管，以及The sheath described above, and
插入管，所述插入管包括主动弯曲段12，所述主动弯曲段12位于所述插入管的远端区域，并且所述主动弯曲段12容置于所述鞘管的远端管段的管腔内，并且所述鞘管的后端与所述插入管的近端密封连接。The insertion tube comprises an active bending section 12, the active bending section 12 is located in the distal region of the insertion tube, and the active bending section 12 is accommodated in the lumen of the distal section of the sheath tube, and the rear end of the sheath tube is sealed and connected to the proximal end of the insertion tube.
优选地，所述主动弯曲段12的枢转轴线与所述刚度调节杆的轴心线共面。Preferably, the pivot axis of the active bending section 12 is coplanar with the axis of the stiffness adjustment rod.
本发明还提供了一种内窥镜，包括上述的一种内窥镜插入部。The present invention also provides an endoscope, comprising the endoscope insertion portion described above.
1、本发明中，鞘管的远端管段的刚性通过刚度调节杆来进行调 节或者切换，具体地，当刚度调节杆沿容置通道的轴线方向移动至远端管段的区域时，可使得远端管段的刚性被增强，此时，鞘管与内窥镜插入部的复合体远端具有较强的刚性，不易被折弯，医生可将鞘管与内窥镜插入部的复合体插入至人体术区的目标位置，在置入过程中人体组织挤压并不足以使得鞘管与内窥镜插入部的复合体弯曲，从而保留了硬质内窥镜在插入过程中的优势。1. In the present invention, the rigidity of the distal end of the sheath is adjusted by a rigidity adjustment rod. Section or switch, specifically, when the stiffness adjusting rod moves to the area of the distal tube segment along the axial direction of the accommodating channel, the rigidity of the distal tube segment can be enhanced. At this time, the distal end of the complex of the sheath tube and the endoscope insertion part has strong rigidity and is not easy to be bent. The doctor can insert the complex of the sheath tube and the endoscope insertion part into the target position of the human surgical area. During the insertion process, the compression of the human tissue is not enough to make the complex of the sheath tube and the endoscope insertion part bend, thereby retaining the advantages of the rigid endoscope during the insertion process.
2、本发明中，当鞘管与内窥镜插入部的复合体达到目标术区后，若此时需要复合体的远端进行弯曲，从而帮助医生获得更大的术区视野，或者是帮助医生将处置器械，比如活检钳等装置置入到目标位置，此时并不需要医生扳动鞘管与内窥镜插入部的刚性复合体来调整视角，而是只需要将刚度调节杆朝插入部的近端移动，使得刚度调节杆不位于鞘管的远端管段区域，从而可使得鞘管的远端管段的刚性降低，刚性降低后的远端管段可通过内窥镜主动弯曲段12的弯曲使远端管段同步朝向主动弯曲段12的弯曲方向弯曲，从而帮助医生获得更大的术区视野范围。2. In the present invention, when the complex of the sheath and the insertion part of the endoscope reaches the target surgical area, if the distal end of the complex needs to be bent at this time to help the doctor obtain a larger field of view of the surgical area, or to help the doctor place treatment instruments, such as biopsy forceps, into the target position, the doctor does not need to turn the rigid complex of the sheath and the insertion part of the endoscope to adjust the viewing angle. Instead, the doctor only needs to move the stiffness adjustment rod toward the proximal end of the insertion part so that the stiffness adjustment rod is not located in the distal tube section area of the sheath, thereby reducing the rigidity of the distal tube section of the sheath. The distal tube section after the rigidity is reduced can bend synchronously toward the bending direction of the active bending section 12 through the bending of the active bending section 12 of the endoscope, thereby helping the doctor obtain a larger field of view of the surgical area.
3、本发明中，当操作者控制主动弯曲段12弯曲时，鞘管的远端管段仅有一部分被弯曲的情况下，其它部分不能被弯曲，此时主动弯曲段12所呈现出来的弯曲角度小于其原有长度下的弯曲角度，并且可稳定保持该弯曲角度下的弯曲状态。3. In the present invention, when the operator controls the active bending section 12 to bend, only a portion of the distal tube section of the sheath is bent, and the other portion cannot be bent. At this time, the bending angle presented by the active bending section 12 is smaller than the bending angle at its original length, and the bending state at this bending angle can be stably maintained.
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment of the present invention or the description of the prior art. Obviously, The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.
图1是本发明实施例提供的可调节刚度的负压吸引鞘第一结构示意图；FIG1 is a schematic diagram of a first structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention;
图2是本发明实施例提供的可调节刚度的负压吸引鞘第二结构示意图；FIG2 is a schematic diagram of a second structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention;
图3是本发明实施例提供的可调节刚度的负压吸引鞘第三结构示意图以及远端管段B区域的局部放大结构示意图；3 is a schematic diagram of the third structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention and a schematic diagram of a partial enlarged structure of a distal tube segment B region;
图4是本发明实施例提供的可调节刚度的负压吸引鞘与内窥镜插入部的配合连接结构示意图，以及A区域的局部放大剖面示意图；4 is a schematic diagram of the structure of the coupling connection between the negative pressure suction sheath with adjustable stiffness and the endoscope insertion portion provided by an embodiment of the present invention, and a partial enlarged cross-sectional schematic diagram of region A;
图5是本发明实施例提供的可调节刚度的负压吸引鞘剖面结构第一示意图，以及C区域的局部放大示意图；5 is a first schematic diagram of a cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided by an embodiment of the present invention, and a partial enlarged schematic diagram of region C;
图6是本发明实施例提供的可调节刚度的负压吸引鞘与内窥镜插入部的配合连接结构示意图，以及E区域的局部放大剖面示意图；6 is a schematic diagram of the structure of the coupling connection between the negative pressure suction sheath with adjustable stiffness and the endoscope insertion portion provided by an embodiment of the present invention, and a partial enlarged cross-sectional schematic diagram of the E region;
图7是本发明实施例提供的可调节刚度的负压吸引鞘的剖面结构第二示意图；7 is a second schematic diagram of the cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided in an embodiment of the present invention;
图8是本发明实施例提供的可调节刚度的负压吸引鞘的剖面结构第三示意图，以及D区域的局部放大示意图。8 is a third schematic diagram of the cross-sectional structure of a negative pressure suction sheath with adjustable stiffness provided in an embodiment of the present invention, and a partial enlarged schematic diagram of the D region.
附图中，In the accompanying drawings,
10、手柄；11、拨杆；12、主动弯曲段；120、蛇骨关节；20、鞘管；20a、吸引通道；20b、管腔；21、远端管段；23、外管；230、 容置通道；230a、止挡部；230b、第二止挡部；231、连接肋；232、排气孔；233、内管；233a、远端部；233b、近端部；24、连接部；25、吸引嘴；26、容置槽；31、刚度调节杆；31a、远端端面；31b、近端端面；32、操作部；33、牵引部；331、连杆。10. handle; 11. lever; 12. active bending section; 120. snake bone joint; 20. sheath; 20a. suction channel; 20b. lumen; 21. distal tube section; 23. outer tube; 230. Accommodating channel; 230a, stopper; 230b, second stopper; 231, connecting rib; 232, exhaust hole; 233, inner tube; 233a, distal end; 233b, proximal end; 24, connecting part; 25, suction nozzle; 26, accommodating groove; 31, stiffness adjustment rod; 31a, distal end face; 31b, proximal end face; 32, operating part; 33, traction part; 331, connecting rod.
以下的说明提供了许多不同的实施例、或是例子，用来实施本发明的不同特征。以下特定例子所描述的元件和排列方式，仅用来精简的表达本发明，其仅作为例子，而并非用以限制本发明。The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.
为使本发明实施方式的目的、技术方案和优点更加清楚，下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。因此，以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两 个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be two-way connection. The connection within an element or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", "third", etc. are only used to distinguish and describe, and cannot be understood as indicating or implying relative importance.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之上或之下可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征之上、上方和上面包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征之下、下方和下面包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a 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. A first feature being below, below, and below a 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.
另外，在本发明中，“近端”和“远端”是本结构在使用环境下，相对于人体操作的远近位置，以方便对部件之间的位置关系进行描述，同时方便理解；针对同一部件而言，“近端”和“远端”是该部件的相对位置关系，而非绝对的；因此，应当按照实现本发明原理的角度来进行理解，而不能偏离本发明的实质。In addition, in the present invention, "proximal end" and "distal end" refer to the far and near positions of the structure relative to human operation in the use environment, so as to facilitate the description of the positional relationship between components and facilitate understanding; for the same component, "proximal end" and "distal end" are the relative positional relationship of the component, not absolute; therefore, it should be understood from the perspective of realizing the principles of the present invention, and should not deviate from the essence of the present invention.
通过对现有技术中硬质内窥镜的应用场景分析，可以得到不采用柔性插入部的内窥镜原因在于，具有柔性插入部的内窥镜由于主动弯曲段12的抗弯刚度较小，在介入到人体组织的过程中会受到人体组织的压迫而弯曲，使得医生难以将插入部准确快捷的介入到人体内的目标区域，因此，经发明人长期的研究，解决了上述硬质插入部内窥镜的弊端，具体方案如下： By analyzing the application scenarios of rigid endoscopes in the prior art, it can be concluded that the reason for not using an endoscope with a flexible insertion portion is that the endoscope with a flexible insertion portion will be compressed and bent by the human tissue during the process of intervening in the human tissue due to the low bending stiffness of the active bending section 12, making it difficult for doctors to accurately and quickly insert the insertion portion into the target area in the human body. Therefore, after long-term research by the inventor, the drawbacks of the above-mentioned rigid insertion endoscope have been solved, and the specific solution is as follows:
请结合附图1至附图4所示，本发明提供了一种可调节刚度的负压吸引鞘，包括：Referring to Figures 1 to 4 , the present invention provides a negative pressure suction sheath with adjustable stiffness, comprising:
鞘管20，其中，所述鞘管20安装在所述内窥镜插入部的外周，以包裹内窥镜的插入部，结合附图4所示；具体地，请结合附图1至附图3所示，所述鞘管20沿其轴向开设有用于安装内窥镜插入部的管腔20b，并且沿所述鞘管20的长度方向开设有吸引通道20a，所述吸引通道20a贯穿所述鞘管20的远端，并向所述鞘管20的近端延申，且吸引通道20a连通一吸引嘴25，通过将吸引嘴25外接至一负压机构，既可实现将待抽吸物质从吸引通道20a远端朝近端转移，并从吸引嘴25抽离。请结合附图4所示，鞘管20的近端设置有连接部24，该连接部24可密封安装至插入部的近端，或者手柄10的远端部。The sheath tube 20 is installed on the outer periphery of the insertion part of the endoscope to wrap the insertion part of the endoscope, as shown in Figure 4; specifically, please refer to Figures 1 to 3, the sheath tube 20 is provided with a lumen 20b for installing the insertion part of the endoscope along its axial direction, and a suction channel 20a is provided along the length direction of the sheath tube 20, the suction channel 20a runs through the distal end of the sheath tube 20 and extends to the proximal end of the sheath tube 20, and the suction channel 20a is connected to a suction nozzle 25, and by connecting the suction nozzle 25 to a negative pressure mechanism, the material to be sucked can be transferred from the distal end of the suction channel 20a to the proximal end and extracted from the suction nozzle 25. Please refer to Figure 4, the proximal end of the sheath tube 20 is provided with a connecting portion 24, and the connecting portion 24 can be sealed and installed to the proximal end of the insertion part, or the distal end of the handle 10.
请结合附图5所示，所述鞘管20沿轴线方向开设有容置通道230，所述容置通道230从所述鞘管20的近端区域延申至所述鞘管20的远端区域；所述鞘管20的远端管段21具有挠性，在外力作用下可被弯曲；可理解为，当内窥镜的主动弯曲段12受控弯曲时，主动弯曲段12的弯曲力可使得鞘管20的远端管段21朝所述主动弯曲段12的弯曲方向被迫弯曲，从而实现在主动弯曲段12的带动下，使得鞘管20在不同的方向进行弯曲，从而可覆盖更大的术野区域；其中主动弯曲段12为现有技术，比如附图4实施例中所示出的铆接在一起的蛇骨关节120，或者其它任意可实现弯曲功能的现有可控弯曲结构。Please refer to Figure 5, the sheath 20 is provided with a accommodating channel 230 along the axial direction, and the accommodating channel 230 extends from the proximal area of the sheath 20 to the distal area of the sheath 20; the distal tube section 21 of the sheath 20 is flexible and can be bent under the action of external force; it can be understood that when the active bending section 12 of the endoscope is controlled to bend, the bending force of the active bending section 12 can force the distal tube section 21 of the sheath 20 to bend in the bending direction of the active bending section 12, thereby realizing that the sheath 20 is driven by the active bending section 12 to bend in different directions, thereby covering a larger surgical field area; wherein the active bending section 12 is a prior art, such as the riveted snake bone joint 120 shown in the embodiment of Figure 4, or any other existing controllable bending structure that can realize the bending function.
进一步地，请详见附图1、2、4和附图5，本负压吸引鞘还包括：刚度调节杆31，所述刚度调节杆31沿所述鞘管20的轴向方向活动 安装于所述容置通道230内；所述刚度调节杆31具有预设抗弯刚度，当所述刚度调节杆31伸入至所述鞘管20的远端管段21所包围的容置通道230时，所述预设抗弯刚度满足当所述鞘管20的远端管段21受到外力作用时，不可被弯曲。在本发明中，鞘管20的远端管段21的刚性通过刚度调节杆31来进行调节或者切换，具体地，当刚度调节杆31沿容置通道230的轴线方向移动至远端管段21的区域时，可使得远端管段21的刚性被增强，此时，鞘管20与内窥镜插入部的复合体远端具有较强的刚性，不易被折弯，医生可将鞘管20与内窥镜插入部的复合体插入至人体术区的目标位置，在置入过程中人体组织挤压并不足以使得鞘管20与内窥镜插入部的复合体弯曲，从而保留了硬质内窥镜在插入过程中的优势；然而，当鞘管20与内窥镜插入部的复合体达到目标术区后，若此时需要复合体的远端进行弯曲，从而帮助医生获得更大的术区视野，或者是帮助医生将处置器械，比如活检钳等装置置入到目标位置，此时并不需要医生扳动鞘管20与内窥镜插入部的刚性复合体来调整视角，而是只需要将刚度调节杆31朝插入部的近端移动，使得刚度调节杆31不位于鞘管20的远端管段21区域，从而可使得鞘管20的远端管段21的刚性降低，刚性降低后的远端管段21可通过内窥镜主动弯曲段12的弯曲使远端管段21同步朝向主动弯曲段12的弯曲方向弯曲，从而帮助医生获得更大的术区视野范围。Further, please refer to Figures 1, 2, 4 and 5 for details. The present negative pressure suction sheath further comprises: a stiffness adjustment rod 31, which moves along the axial direction of the sheath tube 20. Installed in the accommodating channel 230; the stiffness adjustment rod 31 has a preset bending stiffness. When the stiffness adjustment rod 31 extends into the accommodating channel 230 surrounded by the distal tube section 21 of the sheath tube 20, the preset bending stiffness satisfies that when the distal tube section 21 of the sheath tube 20 is subjected to external force, it cannot be bent. In the present invention, the rigidity of the distal tube segment 21 of the sheath tube 20 is adjusted or switched by the rigidity adjustment rod 31. Specifically, when the rigidity adjustment rod 31 moves to the area of the distal tube segment 21 along the axial direction of the accommodating channel 230, the rigidity of the distal tube segment 21 can be enhanced. At this time, the distal end of the complex of the sheath tube 20 and the endoscope insertion part has strong rigidity and is not easy to bend. The doctor can insert the complex of the sheath tube 20 and the endoscope insertion part into the target position of the human surgical area. During the insertion process, the compression of human tissue is not enough to make the complex of the sheath tube 20 and the endoscope insertion part bend, thereby retaining the advantages of the rigid endoscope during the insertion process; however, when the complex of the sheath tube 20 and the endoscope insertion part reaches the target surgical area After the operation, if the distal end of the complex needs to be bent to help the doctor obtain a larger field of view of the surgical area, or to help the doctor place treatment instruments, such as biopsy forceps, at the target position, the doctor does not need to turn the rigid complex of the sheath 20 and the insertion part of the endoscope to adjust the viewing angle. Instead, the doctor only needs to move the stiffness adjustment rod 31 toward the proximal end of the insertion part so that the stiffness adjustment rod 31 is not located in the distal tube segment 21 area of the sheath 20, thereby reducing the rigidity of the distal tube segment 21 of the sheath 20. The distal tube segment 21 after the rigidity is reduced can bend synchronously toward the bending direction of the active bending segment 12 through the bending of the active bending segment 12 of the endoscope, thereby helping the doctor obtain a larger field of view of the surgical area.
需要进行说明的是，刚度调节杆31移动至插入部的近端过程中，刚度调节杆31的远端可终止于容置通道230内的任意位置，请结合 附图6所示；也就是说，刚度调节杆31可以有部分容置在内窥镜插入部主动弯曲段12所设置的区域内，从而使得远端管段21具有两种刚度，具体地，结合附图6，假设鞘管20与主动弯曲段12的适配长度为L1+L2，其中，刚度调节杆31的远端端面31a终止距离鞘管20的远端端部L1的位置处，此时刚度调节杆31的容置位置覆盖主动弯曲段12的长度为L2，因此可以理解为，主动弯曲段12仅在位于L1的管段区域可以进行可控弯曲，而不受刚度调节杆31的制约；然而位于L2管段区域内主动弯曲段12受控于刚度调节杆31的制约而不能够进行可控弯曲；因此从弯曲状态的结果可具体表现为，当操作者控制主动弯曲段12弯曲时，鞘管20的远端管段21仅有一部分被弯曲的情况下，其它部分不能被弯曲，此时主动弯曲段12所呈现出来的弯曲角度小于其原有长度下的弯曲角度，并且可稳定保持该弯曲角度下的弯曲状态；其优势在于，在常规的操作中，操作者在使用过程中需要将主动弯曲可控弯曲至一定的角度并进行保持，当主动弯曲段12弯曲至其可弯曲范围内的中间任意角度时，其支撑性仅能依靠控制其弯曲的牵引绳的稳定保持在预定的位置处，因此其稳定性是难以被保障的，其中控制牵引绳的移动通过手柄10上的拨杆拨动实现，其结构为现有技术，在此不做赘述；本发明中，主动弯曲段12在位于L1的管段区域内进行可控弯曲后并到达该管段的弯曲极限，当到达弯曲极限后可继续拉拽牵引绳，此时位于L1管段区域内的主动弯曲段12并不会继续弯曲，而会稳定的保持该弯曲状态的角度，哪怕在外力的作用下也难以改变。 It should be noted that, during the process of the stiffness adjustment rod 31 moving to the proximal end of the insertion portion, the distal end of the stiffness adjustment rod 31 may terminate at any position in the accommodating channel 230. As shown in FIG. 6 ; that is, the stiffness adjustment rod 31 can be partially accommodated in the area where the active bending section 12 of the endoscope insertion part is set, so that the distal tube section 21 has two stiffnesses. Specifically, in combination with FIG. 6 , it is assumed that the adaptation length of the sheath 20 and the active bending section 12 is L1+L2, wherein the distal end surface 31a of the stiffness adjustment rod 31 terminates at a position L1 away from the distal end of the sheath 20. At this time, the length of the active bending section 12 covered by the accommodation position of the stiffness adjustment rod 31 is L2. Therefore, it can be understood that the active bending section 12 can only be controllably bent in the tube section area located at L1 without being restricted by the stiffness adjustment rod 31; however, the active bending section 12 located in the tube section area L2 is controlled by the restriction of the stiffness adjustment rod 31 and cannot be controllably bent; therefore, the result of the bending state can be specifically manifested as, when the operator controls the active bending section 12 to bend, only a part of the distal tube section 21 of the sheath 20 is bent, and the other parts cannot be bent. At this time, the bending angle presented by the active bending section 12 is smaller than the bending angle at its original length, and the bending state at this bending angle can be stably maintained; its advantage is that in conventional operation, the operator needs to controllably bend the active bending section 12 to a certain angle and maintain it during use. When the active bending section 12 is bent to any middle angle within its bendable range, its support can only be maintained at a predetermined position by the traction rope that controls its bending. Therefore, its stability is difficult to ensure, wherein the movement of the traction rope is controlled by moving the lever on the handle 10, and its structure is prior art and will not be elaborated here. In the present invention, after the active bending section 12 is controllably bent in the pipe section area located at L1 and reaches the bending limit of the pipe section, the traction rope can continue to be pulled when the bending limit is reached. At this time, the active bending section 12 located in the pipe section area L1 will not continue to bend, but will stably maintain the angle of the bending state, which is difficult to change even under the action of external force.
请结合图3所示，所述鞘管20的远端管段21包括：As shown in FIG. 3 , the distal end tube section 21 of the sheath tube 20 includes:
外管23、内管233以及连接肋231，所述外管23套设在所述内管233的外侧，所述连接肋231沿所述鞘管20的轴向设置，并固定于所述内管233与外管23之间；所述内管233的内环空间用于容置所述内窥镜插入部的主动弯曲段12；需要进行说明的是内管233的长度可与外管不同，在可选的实施例中如附图4和附图5中，内管233的长度与主动弯曲段12的长度相适配，内管233的远端部233a与内窥镜插入部的远端面平齐，内管233的近端部233b终止与主动弯曲段12的近端附近；当然，内管233的近端部233b也可以向管鞘20的近端延伸，但不会阻碍吸引通道20a与吸引嘴25之间的连通关系。An outer tube 23, an inner tube 233 and a connecting rib 231, wherein the outer tube 23 is sleeved on the outer side of the inner tube 233, and the connecting rib 231 is arranged along the axial direction of the sheath tube 20 and fixed between the inner tube 233 and the outer tube 23; the inner annular space of the inner tube 233 is used to accommodate the active bending section 12 of the endoscope insertion part; it should be noted that the length of the inner tube 233 may be different from that of the outer tube. In an optional embodiment as shown in Figures 4 and 5, the length of the inner tube 233 is adapted to the length of the active bending section 12, the distal end 233a of the inner tube 233 is flush with the distal end surface of the endoscope insertion part, and the proximal end 233b of the inner tube 233 terminates near the proximal end of the active bending section 12; of course, the proximal end 233b of the inner tube 233 may also extend to the proximal end of the sheath 20, but it will not hinder the connection between the suction channel 20a and the suction nozzle 25.
请结合附图7和图8所示，所述内管233与外管23之间的间隔区域形成所述吸引通道20a，吸引通道20a与吸引嘴25连通，操作时，吸引嘴25处连接一负压机构，通过负压机构的抽吸作用，使得流体f从吸引通道20a进入然后经附图8中的虚线从吸引嘴25处离开。Please refer to Figures 7 and 8. The spacing area between the inner tube 233 and the outer tube 23 forms the suction channel 20a. The suction channel 20a is connected to the suction nozzle 25. During operation, a negative pressure mechanism is connected to the suction nozzle 25. Through the suction effect of the negative pressure mechanism, the fluid f enters from the suction channel 20a and then leaves from the suction nozzle 25 through the dotted line in Figure 8.
请结合附图3所述，所述连接肋231对称分布于所述内管233的两侧，使得所述远端管段21在对称分布的两个连接肋231的轴心线所形成平面的法线方向的抗弯刚度小于所述平面内任意方向的抗弯刚度，换言之，鞘管20在受到两连接肋231形成的平面任意方向的力时，难以使得鞘管20弯曲，然而当受到来自与所述平面垂直方向的力时，可使得鞘管20弯曲，这样鞘管20表现出在不同的方向受迫弯曲的难易程度不同，其优势在于当主动弯曲段12驱动鞘管20弯曲 时，鞘管20的弯曲方向与主动弯曲段12的弯曲方向同步一致，保障主动弯曲段12弯曲的稳定性；需要进行说明的是，为实现鞘管20与主动弯曲段12同步一致的弯曲方向，主动弯曲段12与鞘管20配合安装时，需要所述主动弯曲段12的枢转轴线p与所述刚度调节杆31的轴心线(a1，a2)共面，请结合附图4所示。Please refer to the description in FIG. 3 , the connecting ribs 231 are symmetrically distributed on both sides of the inner tube 233, so that the bending stiffness of the distal tube section 21 in the normal direction of the plane formed by the axis lines of the two symmetrically distributed connecting ribs 231 is smaller than the bending stiffness in any direction in the plane. In other words, when the sheath tube 20 is subjected to a force in any direction of the plane formed by the two connecting ribs 231, it is difficult to bend the sheath tube 20. However, when subjected to a force from a direction perpendicular to the plane, the sheath tube 20 can be bent. In this way, the sheath tube 20 shows different degrees of difficulty in being forced to bend in different directions. The advantage is that when the active bending section 12 drives the sheath tube 20 to bend , the bending direction of the sheath 20 is synchronized with the bending direction of the active bending section 12, thereby ensuring the bending stability of the active bending section 12; it should be noted that in order to achieve a synchronous bending direction between the sheath 20 and the active bending section 12, when the active bending section 12 is installed in coordination with the sheath 20, the pivot axis p of the active bending section 12 is required to be coplanar with the axial center line (a1, a2) of the stiffness adjustment rod 31, as shown in FIG4 .
请结合附图7所示，所述刚度调节杆31在所述平面的法线方向q的抗弯刚度大于所述平面内任意方向的抗弯刚度，所述平面是指两连接肋231中心线所形成的平面；换言之，刚度调节杆31在移动至鞘管20的远端管段21时，鞘管20在预定方向的易弯曲特性受到刚度调节杆31的制约，而使鞘管20此时变为刚性管不可弯曲。Please refer to Figure 7, the bending stiffness of the stiffness adjustment rod 31 in the normal direction q of the plane is greater than the bending stiffness in any direction within the plane, and the plane refers to the plane formed by the center lines of the two connecting ribs 231; in other words, when the stiffness adjustment rod 31 moves to the distal tube section 21 of the sheath tube 20, the easy bending property of the sheath tube 20 in a predetermined direction is restricted by the stiffness adjustment rod 31, and the sheath tube 20 becomes a rigid tube and cannot be bent at this time.
请结合附图3和附图5所示，所述连接肋231内沿所述鞘管20的轴向开设所述容置通道230，所述容置通道230的远端终止于所述连接肋231的远端区域，并且所述连接肋231在所述容置通道230的远端形成止挡部230a，用于抵接所述刚度调节杆31的远端端面31a，同理在容置通道230的近端亦可设置第二止挡部230b，用于刚度调节杆31近端的限位。进一步地，所述连接肋231的远端贯穿开设有排气孔232，所述排气孔232与所述容置通道230连通。需要进行说明的是，当刚度调节杆31在容置通道230内移动时，容置通道230远端区域的空间体积时刻发生变化，即当刚度调节杆31向鞘管20的远端管段21移动时，容置空间沿轴线方向被压缩，此时空间内的压强增加，会导致刚度调节杆31进一步朝远端管段21方向移动受阻；反之，当刚度调节杆31从鞘管20的远端管段21朝鞘管20的近端移 动时，容置空间体积增加，从而使得空间内的压强降低，进而对刚度调节杆31产生拉拽作用，使其移动过程受阻；因此在连接肋231的远端开设排气孔232的目的是使得容置空间内的气压平衡，保障刚度调节杆31的移动过程顺畅。Please refer to Figures 3 and 5 , the accommodating channel 230 is provided in the connecting rib 231 along the axial direction of the sheath tube 20, the distal end of the accommodating channel 230 terminates at the distal region of the connecting rib 231, and the connecting rib 231 forms a stopper 230a at the distal end of the accommodating channel 230, which is used to abut against the distal end surface 31a of the stiffness adjustment rod 31, and similarly, a second stopper 230b can also be provided at the proximal end of the accommodating channel 230, which is used to limit the proximal end of the stiffness adjustment rod 31. Furthermore, an exhaust hole 232 is provided through the distal end of the connecting rib 231, and the exhaust hole 232 is connected to the accommodating channel 230. It should be noted that when the stiffness adjustment rod 31 moves in the accommodating channel 230, the spatial volume of the distal region of the accommodating channel 230 changes all the time, that is, when the stiffness adjustment rod 31 moves toward the distal tube section 21 of the sheath tube 20, the accommodating space is compressed along the axial direction. At this time, the pressure in the space increases, which will cause the stiffness adjustment rod 31 to be further blocked from moving toward the distal tube section 21. On the contrary, when the stiffness adjustment rod 31 moves from the distal tube section 21 of the sheath tube 20 toward the proximal end of the sheath tube 20, the stiffness adjustment rod 31 is compressed along the axial direction. When the rib 231 moves, the volume of the accommodating space increases, thereby reducing the pressure in the space, thereby pulling the stiffness adjustment rod 31 and hindering its movement. Therefore, the purpose of opening the exhaust hole 232 at the far end of the connecting rib 231 is to balance the air pressure in the accommodating space and ensure smooth movement of the stiffness adjustment rod 31.
请结合附图5和附图7所示，所述刚度调节杆31的近端连接有牵引部33，所述牵引部33通过一连杆331与所述刚度调节杆31连接，所述牵引部33套设于所述鞘管20的外侧，在可选的实施例中还可以在所示牵引部33的外侧设置操作部32，所述操作部32用于方便操作者推动刚度调节杆31，其中操作部32的结构与形态并不做具体限定。Please refer to Figures 5 and 7. The proximal end of the stiffness adjustment rod 31 is connected to a traction portion 33, and the traction portion 33 is connected to the stiffness adjustment rod 31 through a connecting rod 331. The traction portion 33 is sleeved on the outside of the sheath 20. In an optional embodiment, an operating portion 32 can also be provided on the outside of the traction portion 33. The operating portion 32 is used to facilitate the operator to push the stiffness adjustment rod 31, wherein the structure and shape of the operating portion 32 are not specifically limited.
请结合附图7所示，所述鞘管20的近端区域侧壁沿其轴向方向开设有容置槽26，所述容置槽26连通所述容置通道230，并且所述连杆331容置于所述容置槽26内。As shown in FIG. 7 , a accommodating groove 26 is formed on the side wall of the proximal region of the sheath tube 20 along its axial direction. The accommodating groove 26 is connected to the accommodating channel 230 , and the connecting rod 331 is accommodated in the accommodating groove 26 .
本发明又提供了一种内窥镜插入部，包括：The present invention further provides an endoscope insertion portion, comprising:
上述的鞘管20，以及The sheath tube 20, and
插入管，所述插入管包括主动弯曲段12，所述主动弯曲段12位于所述插入管的远端区域，并且所述主动弯曲段12容置于所述鞘管20的远端管段21的管腔20b内，并且所述鞘管20的后端与所述插入管的近端密封连接。The insertion tube includes an active bending section 12, which is located in the distal region of the insertion tube, and the active bending section 12 is accommodated in the lumen 20b of the distal section 21 of the sheath tube 20, and the rear end of the sheath tube 20 is sealed and connected to the proximal end of the insertion tube.
优选地，所述主动弯曲段12的枢转轴线与所述刚度调节杆31的轴心线共面。Preferably, the pivot axis of the active bending section 12 is coplanar with the axis of the stiffness adjustment rod 31 .
本发明还提供了一种内窥镜，包括上述的一种内窥镜插入部。 The present invention also provides an endoscope, comprising the endoscope insertion portion described above.
需要说明的是，本申请实施例的内窥镜可以为支气管镜、肾盂镜、食道镜、胃镜、肠镜、耳镜、鼻镜、口腔镜、喉镜、阴道镜、腹腔镜、关节镜等，本申请实施例对内窥镜的种类不做具体限制。It should be noted that the endoscope in the embodiments of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not specifically limit the type of endoscope.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。 The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048579.8 | 2023-01-31 | ||
| CN202310048579.8A CN115956864B (en) | 2023-01-31 | 2023-01-31 | Rigidity-adjustable negative pressure suction sheath, insertion part and endoscope |
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| Publication Number | Publication Date |
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| WO2024159664A1 true WO2024159664A1 (en) | 2024-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2023/096800 Ceased WO2024159664A1 (en) | 2023-01-31 | 2023-05-29 | Negative-pressure aspiration sheath with adjustable stiffness, insertion portion, and endoscope |
Country Status (2)
| Country | Link |
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| CN (1) | CN115956864B (en) |
| WO (1) | WO2024159664A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118845101A (en) * | 2024-09-25 | 2024-10-29 | 湖南省华芯医疗器械有限公司 | Introducer sheath and sheath assembly |
| CN118986247A (en) * | 2024-10-24 | 2024-11-22 | 湖南省华芯医疗器械有限公司 | Medical instrument and guide tube |
| CN119318515A (en) * | 2024-09-25 | 2025-01-17 | 上海英诺伟医疗器械股份有限公司 | Negative pressure suction rotary-cut biopsy needle and biopsy system |
| CN120501369A (en) * | 2025-07-21 | 2025-08-19 | 湖南省华芯医疗器械有限公司 | Insertion part, endoscope and negative pressure suction assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115956864B (en) * | 2023-01-31 | 2024-11-01 | 湖南省华芯医疗器械有限公司 | Rigidity-adjustable negative pressure suction sheath, insertion part and endoscope |
| CN116439649A (en) * | 2023-04-28 | 2023-07-18 | 湖南省华芯医疗器械有限公司 | A kind of far-end flexible guiding sheath, ureteroscope and using method thereof |
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| CN119564130B (en) * | 2025-02-06 | 2025-05-27 | 湖南省华芯医疗器械有限公司 | Pressure balance structure, endoscope and implantation system |
| CN119680081B (en) * | 2025-02-25 | 2025-06-24 | 北京华脉泰科医疗器械股份有限公司 | Adjustable curved guide wire assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115956864A (en) | 2023-04-14 |
| CN115956864B (en) | 2024-11-01 |
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