Outer sheath tube assembly of abdominal cavity puncture outfit and abdominal cavity end introducer of ventricular and abdominal cavity shunt tube

Abstract

The utility model relates to an abdominal cavity puncture outfit outer sheath tube assembly and a ventricle and abdominal cavity shunt tube abdominal cavity end introducer, the abdominal cavity puncture outfit outer sheath tube assembly comprises an abdominal cavity puncture outfit and a sheath tube assembly, the sheath tube assembly is provided with an outer sheath tube and an inner sheath tube, and the inner sheath tube is rotatably arranged in the outer sheath tube; the sheath tube assembly has a side wall closed state and a side wall open state; when the inner sheathing canal rotates in the outer sheathing canal, the sheathing canal assembly can be switched between the side wall closed state and the side wall open state, and the shunt tube can be fed into the abdominal cavity along the sheathing canal assembly in the side wall open state. By adopting a puncture catheterization mode, the laparoscope assistance is not needed, the operation is simple, the time is saved, and the trauma is small.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, and more particularly to an outer sheath tube assembly of an abdominal trocar and an inserter for the abdominal end of a ventriculoperitoneal shunt tube. Background Art

[0002] The existing methods for placing the abdominal end of a ventriculoperitoneal shunt tube into the abdominal cavity mainly include the following: 1. Conventional open laparotomy placement: This method causes relatively large trauma (incision 4 - 5 cm), takes a long time, is difficult for obese patients, has more complications, and a long postoperative recovery time. 2. Laparoscope-assisted placement: This method requires a laparoscope and the operator to be familiar with laparoscope operation, which is difficult to learn for neurosurgeons who are not specialized in general surgery, has high equipment requirements, and high costs. 3. Simple trocar: When puncturing the abdominal cavity in this way, it is impossible to effectively protect deep organs; it is impossible to effectively confirm whether the peritoneum is punctured; when inserting the tube, abdominal wall fat will squeeze into the tube sheath from the side slot, hindering the tube insertion, resulting in the shunt tube may coil or bend in the abdominal wall. Summary of the Utility Model

[0003] In view of the above analysis, the embodiments of the present utility model aim to provide an outer sheath tube assembly of an abdominal trocar and an inserter for the abdominal end of a ventriculoperitoneal shunt tube to solve the above technical problems existing in the prior art.

[0004] The object of the present utility model is achieved as follows:

[0005] On the one hand, an outer sheath tube assembly of an abdominal trocar is provided, including an outer sheath tube and an inner sheath tube, the inner sheath tube is rotatably arranged inside the outer sheath tube; the outer sheath tube assembly of the abdominal trocar has a side wall closed state and a side wall open state; when the inner sheath tube rotates inside the outer sheath tube, the outer sheath tube assembly of the abdominal trocar can switch between the side wall closed state and the side wall open state, and the shunt tube can be sent into the abdominal cavity along the outer sheath tube assembly in the side wall open state.

[0006] Further, the radial cross-section of the inner sheath tube is a first arc, the radial cross-section of the outer sheath tube is a second arc, the first arc has a first central angle, the second arc has a second central angle, and the sum of the first central angle and the second central angle is greater than 360°.

[0007] Further, 180° ≤ the first central angle ≤ 270°, 180° < the second central angle ≤ 270°.

[0008] Further, the inner sheath tube has a front inner sheath section and a tail inner sheath section; the outer sheath tube has a front outer sheath section and a tail outer sheath section.

[0009] Further, the front section of the inner sheath has a head and a tail. The tail is connected to the tail section of the inner sheath. The cross-section of the tail is a semi-circle, and the cross-section of the head is three-quarters of a circle. A natural transition is provided between the head and the tail.

[0010] Further, a transverse chute and a longitudinal chute are provided on the side wall of the tail section of the outer sheath. The longitudinal chute is located below the transverse chute and communicates with one end of the transverse chute. An inner sheath handle is provided on the outer wall of the tail section of the inner sheath. The inner sheath handle can move within the transverse chute and the longitudinal chute to realize the rotation and vertical movement of the inner sheath tube within the outer sheath tube.

[0011] Further, an outer sheath tightening wrench and a longitudinal tightening seam are also provided on the outer wall of the outer sheath tube. The outer sheath tightening wrench is configured to control the inner diameter of the outer sheath tube by controlling the size of the gap of the longitudinal tightening seam, so as to realize the clamping and release of the shunt tube.

[0012] Further, the outer sheath tube includes a first half tube and a second half tube arranged symmetrically. A first connecting plate is provided on the first half tube, and a second connecting plate is provided on the second half tube. The longitudinal tightening seam is located between the first connecting plate and the second connecting plate. A connecting rod is vertically provided on the first connecting plate, and a through hole is provided on the second connecting plate. The end of the connecting rod passes through the through hole, and the end of the connecting rod is rotatably connected to the outer sheath tightening wrench. When the outer sheath tightening wrench is in the initial position, the main body of the outer sheath tightening wrench is parallel to the axis of the outer sheath tube. At this time, the gap of the longitudinal tightening seam is the initial size. When the outer sheath tightening wrench rotates from the initial position to the horizontal state, the gap of the longitudinal tightening seam gradually becomes smaller, and the gap of the longitudinal tightening seam is the smallest when it rotates to the horizontal state.

[0013] Further, an anti-slip thread is provided on the inner surface of the inner sheath tube.

[0014] Further, the front section of the outer sheath of the outer sheath tube has an outer sheath head end. A reduced-diameter clamping layer is provided on the inner surface of the outer sheath head end. The inclined surface of the reduced-diameter clamping layer has an inner diameter that gradually decreases towards the port of the outer sheath head end.

[0015] On the other hand, a peritoneal end inserter for a ventriculoperitoneal shunt tube is also provided, including:

[0016] A peritoneal puncture device configured to puncture the peritoneal cavity;

[0017] The above-mentioned outer sheath tube assembly of the peritoneal puncture device configured to place the peritoneal end shunt tube.

[0018] Compared with the prior art, the peritoneal puncture trocar outer sheath assembly and the peritoneal end inserter of the ventriculoperitoneal shunt tube provided by the present utility model set the peritoneal puncture trocar outer sheath assembly as an outer sheath tube and an inner sheath tube that are nested with each other and can rotate relative to each other, and openings are provided on the side walls of both the outer sheath tube and the inner sheath tube. In this way, through the relative rotation between the outer sheath tube and the inner sheath tube, the peritoneal puncture trocar outer sheath assembly can be switched between two states: the side wall closed state and the side wall open state, and the shunt tube can be sent into the abdominal cavity along the peritoneal puncture trocar outer sheath assembly in the side wall open state. The insertion device of the present application adopts the method of puncture and catheterization. Through a small incision of 5 mm in the abdominal wall, a single person can safely complete the catheterization operation at the peritoneal end within 10 minutes. It saves time, has less trauma, the patient has less pain, recovers quickly, can resume bowel peristalsis and eating the next day, and does not affect activities. It does not require laparoscopic assistance, the operation is simple, and it is convenient to confirm whether the peritoneum has been truly penetrated into the abdominal cavity after puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the embodiments of the present specification, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0020] Figure 1 Structural schematic diagram of the peritoneal end inserter of the ventriculoperitoneal shunt tube provided by the present utility model Figure 1 ;

[0021] Figure 2 Structural schematic diagram of the peritoneal end inserter of the ventriculoperitoneal shunt tube provided by the present utility model Figure 2 ;

[0022] Figure 3 Structural schematic diagram of the inner sheath tube provided by the present utility model;

[0023] Figure 4 Structural schematic diagram of the outer sheath tube provided by the present utility model;

[0024] Figure 5 Partial structural schematic diagram of the peritoneal end inserter of the ventriculoperitoneal shunt tube provided by the present utility model;

[0025] Figure 6 Schematic diagram of the sheath tube assembly in the side wall open state after rotating the inner sheath handle of the present utility model;

[0026] Figure 7 Schematic diagram of the state where the inner sheath tube extends forward out of the outer sheath tube after pushing down the inner sheath handle of the present utility model;

[0027] Figure 8Schematic diagram of the state where the outer sheath tube is tightened by the outer sheath tightening wrench in the present utility model;

[0028] Figure 9 Schematic diagram of the connection structure between the locking pin and the outer sheath tube provided by the present utility model;

[0029] Figure 10 Schematic diagram of the overall structure of the abdominal puncture device provided by the present utility model;

[0030] Figure 11 Schematic diagram of the connection structure between the tail end of the stylet and the spring inside the needle abdomen of the abdominal puncture device provided by the present utility model.

[0031] Reference numerals:

[0032] 1. Abdominal puncture device; 2. Sheath tube assembly; 3. Needle body; 4. Needle abdomen; 5. Needle tail; 6. Locking pin; 6-1. Locking pin main body; 6-2. Arc-shaped clamping plate; 7. Needle sheath; 8. Stylet; 9. Spring; 10. Outer sheath tube; 10-1. First half tube; 10-11. First connecting plate; 10-12. Connecting rod; 10-2. Second half tube; 10-21. Second connecting plate; 11. Inner sheath tube; 12. Front section of inner sheath; 12-1. Head; 12-2. Tail; 13. Rear section of inner sheath; 14. Inner sheath handle; 15. Card slot; 16. Diameter-reducing clamping layer; 17. Longitudinal tightening seam; 18. Transverse sliding groove; 19. Longitudinal sliding groove; 20. Outer sheath tightening wrench; 21. Front section of outer sheath; 22. Rear section of outer sheath. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. It should be noted that, without conflict, the implementation manners and the features in the implementation manners in the present disclosure can be combined, separated, interchanged and / or rearranged. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] In the drawings, for the purpose of clarity and / or description, the dimensions and relative dimensions of components may be exaggerated, and the same reference numerals represent the same components.

[0035] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0036] Example 1

[0037] A specific embodiment of the utility model discloses a ventriculoperitoneal shunt catheter abdominal end inserter, such as Figures 1 to 2 As shown, it includes an abdominal puncture device 1 and an outer sheath tube assembly of the abdominal puncture device; the abdominal puncture device 1 is configured to puncture the abdominal cavity; the outer sheath tube assembly of the abdominal puncture device is configured to place a shunt tube at the abdominal end, hereinafter referred to as sheath tube assembly 2; the sheath tube assembly 2 has an outer sheath tube 10 and an inner sheath tube 11, the inner sheath tube 11 is rotatably arranged in the outer sheath tube 10, the outer sheath tube 10 and the inner sheath tube 11 can be nested with each other to form a complete sheath tube, and the sheath tube assembly 2 has a side wall closed state and a side wall open state; when the inner sheath tube 11 rotates in the outer sheath tube 10, the sheath tube assembly 2 can switch between the side wall closed state and the side wall open state, and the shunt tube can be sent into the abdominal cavity along the sheath tube assembly 2 in the side wall open state.

[0038] Specifically, if Figures 3 to 7 As shown, the side wall of the outer sheath tube 10 is provided with a first opening arranged axially, and the side wall of the inner sheath tube 11 is provided with a second opening arranged axially, the length of the first opening is equal to the axial length of the outer sheath tube 10, and the length of the second opening is equal to the axial length of the inner sheath tube 11; wherein, the sheath tube assembly 2 has a side wall closed state and a side wall open state; when the inner sheath tube 11 rotates in the outer sheath tube 10, the first opening and the second opening can be directly opposite and staggered, and when directly opposite, the side wall of the sheath tube assembly 2 is in an open state; when staggered, it means that the first opening and the second opening are not connected, so that the sheath tube assembly 2 in the side wall closed state is formed; by making the inner sheath tube 11 and the outer sheath tube 10 rotate relative to each other, the sheath tube assembly 2 can be switched between the side wall closed state and the side wall open state, and the shunt tube can be sent into the abdominal cavity along the sheath tube assembly 2 in the side wall open state. The inner sheath tube 11 rotates in place, and the shunt tube can continue to be clamped and transported to the deep part, completing the operation of sending the tube to the abdominal cavity, and avoiding the shunt tube from being retained or folded in the abdominal wall.

[0039] In one alternative embodiment, the radial cross-section of the inner sheath tube 11 is a first circular arc, and the radial cross-section of the outer sheath tube 10 is a second circular arc. The first circular arc has a first central angle, the second circular arc has a second central angle, and the sum of the first central angle and the second central angle is greater than 360°. Further, 180° ≤ the first central angle ≤ 270°, and 180° < the second central angle ≤ 270°.

[0040] In this embodiment, the inner sheath tube 11 has an inner sheath front section 12 and an inner sheath tail section 13. The inner sheath front section 12 is made of a soft material, such as materials like polytetrafluoroethylene, Vestamid, or prebax; the inner sheath tail section 13 is made of a hard material; the outer sheath tube 10 has an outer sheath front section 21 and an outer sheath tail section 22. The outer sheath tail section 22 is enlarged and open at the front, facilitating the insertion of the shunt tube. Optionally, the outer sheath tube 10 can be made of polycarbonate material.

[0041] In one alternative embodiment, the inner sheath front section 12 has a head 12-1 and a tail 12-2. The tail 12-2 of the inner sheath front section 12 is connected to the inner sheath tail section 13. The cross-section of the tail 12-2 of the inner sheath front section 12 is a semi-circle, and the cross-section of the head 12-1 of the inner sheath front section 12 is a 3 / 4 circle. The head 12-1 and the tail 12-2 are set to transition naturally. That is to say, in the direction from the head 12-1 to the tail 12-2, the length of the perimeter of the radial cross-section of the inner sheath front section 12 gradually and uniformly decreases. It can also be understood that after the inner sheath front section 12 is laid out flat on a plane, the shape of the inner sheath front section 12 in the plane is a trapezoid, and the two bases of the trapezoid are respectively equal to the semi-circle perimeter and the 3 / 4 circle perimeter. Such a design enables the inner sheath tube 11 to be gradually opened from the tail 12-2 to the head 12-1 when rotating the inner sheath tube 11 to open the sheath tube assembly, which is beneficial to avoiding the entry of abdominal wall fat into the cannula during the catheterization process and causing obstruction.

[0042] In one alternative embodiment, a transverse chute 18 is provided on the back of the outer sheath tail section 22, and the end is connected to a longitudinal chute 19. The inner sheath handle 14 can slide in the two chutes, thereby realizing the operation of rotating and moving the inner sheath deeper. Specifically, a transverse chute 18 and a longitudinal chute 19 are provided on the side wall of the outer sheath tail section 22. The longitudinal chute 19 is located below the transverse chute 18 and communicates with one end of the transverse chute 18; an inner sheath handle 14 extending outward is provided on the outer wall of the inner sheath tail section 13. The inner sheath handle 14 can move in the transverse chute 18 and the longitudinal chute 19 to realize the rotation and up-and-down movement of the inner sheath tube 11 within the outer sheath tube 10. For example, the inner sheath tube 11 can be rotated by holding the inner sheath handle 14, so that the sheath tube assembly 2 is switched from the side wall closed state to the side wall open state, facilitating the insertion and detachment of the shunt tube.

[0043] In one alternative embodiment, such as Figure 8As shown, an outer sheath tightening wrench 20 and a longitudinal tightening seam 17 are also provided on the outer wall of the outer sheath tube 10. The outer sheath tightening wrench 20 is configured to control the inner diameter of the outer sheath tube 10 by controlling the size of the gap of the longitudinal tightening seam 17, so as to realize the clamping and release of the shunt tube. By providing the longitudinal tightening seam 17 on the outer sheath tube 10 and cooperating with the outer sheath tightening wrench 20, the inner diameter of the outer sheath can be changed, so as to realize the effective clamping and release of the shunt tube by the inner sheath.

[0044] Specifically, the front section 21 of the outer sheath of the outer sheath tube 10 includes a first half tube 10-1 and a second half tube 10-2 which are symmetrically arranged. The first half tube 10-1 and the second half tube 10-2 are connected to form the front section 21 of the outer sheath of the outer sheath tube 10, and there is a longitudinally adjustable tightening seam 17 between them. The first half tube 10-1 and the second half tube 10-2 are connected by a rotatable pin joint. The tail end of the first half tube 10-1 is separated from the rear section 22 of the outer sheath of the outer sheath tube 10. The length of the longitudinal tightening seam 17 is equal to the length of the front section 21, and there is no tightening seam in the rear section 22 of the outer sheath. The first half tube 10-1 and the second half tube 10-2 of the outer sheath tube are connected by a pin joint between them. Specifically: the rear section 22 of the outer sheath is integral with the front half tube 10-2, and the first half tube 10-1 is connected to the second half tube 10-2 by a pin joint. Exemplarily, the pin joint includes a first connecting plate 10-11, a second connecting plate 10-21 and a connecting rod 10-12. Specifically, the first connecting plate 10-11 is provided on the first half tube 10-1, the second connecting plate 10-21 is provided on the second half tube 10-2, and the longitudinal tightening seam 17 is located between the first connecting plate 10-11 and the second connecting plate 10-21; a connecting rod 10-12 is vertically provided on the first connecting plate 10-11, a through hole is provided on the second connecting plate 10-21, and the end of the connecting rod 10-12 passes through the through hole, and the end of the connecting rod 10-12 is rotatably connected to the outer sheath tightening wrench 20; when the outer sheath tightening wrench 20 is in the initial position, the main body of the outer sheath tightening wrench 20 is parallel to the axis of the outer sheath tube 10, and at this time the gap of the longitudinal tightening seam 17 is the initial size; the tail 12-2 of the outer sheath tightening wrench 20 can squeeze the second connecting plate 10-21, and under the pulling action of the connecting rod 10-12, the first connecting plate 10-11 rotates around the pin joint, so that it can approach the second connecting plate 10-21. When the outer sheath tightening wrench 20 rotates from the initial position to the horizontal state, the gap of the longitudinal tightening seam 17 gradually becomes smaller, and when it rotates to the horizontal state, the gap of the longitudinal tightening seam 17 is the smallest, so as to realize the adjustment of the clamping effect by adjusting the size of the gap of the longitudinal tightening seam 17.

[0045] In one alternative embodiment, the inner surface of the inner sheath tube 11 is provided with anti-slip threads to increase the friction force.

[0046] In one alternative embodiment, the inner surface of the inner sheath tube 11 is provided with anti-slip threads, and the inner surface of the head end of the outer sheath tube 10 has an inclined surface design with a gradually decreasing inner diameter. Specifically, the front section 21 of the outer sheath of the outer sheath tube 10 has an outer sheath head end, and the inner surface of the outer sheath head end is provided with a reduced-diameter clamping layer 16. The inclined surface of the reduced-diameter clamping layer 16 has an inner diameter that gradually decreases towards the port of the outer sheath head end. That is to say, the inner surface of the outer sheath head end of the outer sheath tube 10 is located on an inverted round frustum surface and is a part of the inverted round frustum surface. The inner diameter of the inner surface at the outermost end port of the outer sheath head end is the smallest and is smaller than the inner diameter of the front section 21 of the outer sheath; the inner diameter of the inner surface at the outermost end port of the outer sheath head end is equal to the inner diameter of the front section 21 of the outer sheath. Therefore, when the inner sheath tube 11 moves deeper, the inner diameter will be narrowed under the influence of the inclined surface, thereby achieving the purpose of clamping the shunt tube and moving it deeper.

[0047] In this embodiment, the trocar 1 and the sheath assembly 2 are nested with each other, and the two are connected by a locking pin 6. After successful abdominal puncture, after unlocking the locking pin 6 of the sheath assembly 2 and the trocar 1, the sheath assembly 2 can safely enter the abdominal cavity under the guidance of the trocar 1. At this time, the trocar 1 is withdrawn, and the sheath is used to assist in the catheter placement operation.

[0048] In this embodiment, the trocar 1 is used for safely puncturing the abdominal cavity. As Figure 10 shown, the trocar 1 includes a needle body 3, a needle abdomen 4, and a needle tail 5. A locking pin 6 is provided between the needle body 3 and the needle abdomen 4. The locking pin 6 is configured to control the locking and unlocking of the sheath assembly 2 and the trocar 1.

[0049] Exemplarily, as Figure 9 shown, the locking pin 6 has a locking pin body 6-1 and two arc-shaped clamping plates 6-2. The two arc-shaped clamping plates 6-2 are symmetrically arranged on the outer peripheral wall of the locking pin body 6-1. The locking pin body 6-1 connects the needle body 3 and the needle abdomen 4; the rear section 22 of the outer sheath of the outer sheath tube 10 is provided with two symmetrically arranged card slots 15. The two card slots 15 are symmetrically arranged at the top of the inner wall of the rear section 22 of the outer sheath. The arc-shaped clamping plates 6-2 can rotate in the card slots 15. There are two gaps between the two card slots 15. The two arc-shaped clamping plates 6-2 can be inserted into the card slots 15 to lock the trocar 1, and the trocar 1 can be unlocked by rotating to the two gaps.

[0050] Specifically, the needle body 3 includes an outer needle sheath 7 and an inner needle core 8. The rear of the needle sheath 7 is connected to the outer wall of the needle abdomen 4. The outer diameter of the needle sheath 7 is larger than the outer diameter of the standard shunt tube. For example, the outer diameter of the needle sheath 7 is 2 mm thicker than the outer diameter of the standard shunt tube; the length of the needle sheath 7 is shorter than the length of the needle core 8. The tail end of the needle core 8 is connected to a spring 9 inside the needle abdomen 4. The tail end of the spring 9 is fixed to the inner wall of the tail end of the needle abdomen 4. As Figure 11As shown. The front end of the needle sheath 7 is sharp and slightly shorter than the stylet 8; the stylet 8 is hollow, the front end of the stylet 8 is blunt, with a lateral opening, and is slightly longer than the needle sheath 7; the front end of the needle sheath 7 is obliquely cut, which can cut the abdominal wall tissue when the stylet 8 retracts. Optionally, the needle tail 5 is connected to the needle abdomen 4, and the needle tail 5 is set as a standard syringe interface for connecting a syringe. The trocar 1 with the above structure has a puncture protection function. The front end of the needle sheath is obliquely cut, which can cut the abdominal wall tissue when the stylet retracts. The length of the needle sheath is shorter than that of the stylet. The tail end of the stylet is connected to the spring in the needle abdomen. The front end of the stylet is blunt, which can effectively protect the abdominal organs during puncture and avoid puncture injury.

[0051] During puncture, due to the resistance of the abdominal wall tissue, the stylet 8 will be slightly pushed back into the needle sheath 7, causing the front end of the sharp needle sheath 7 to cut the abdominal wall tissue. Once entering the abdominal cavity, the front-end resistance disappears, and the stylet 8 will return to its original position under the push of the spring 9 behind it, exceeding the needle sheath 7. Since the front end of the stylet 8 is blunt, it can effectively protect the deep organs after the tip of the needle enters the abdominal cavity. At this time, the operator can connect a syringe containing sterile saline to the syringe interface of the needle tail 5. When air can be drawn out and there is no resistance when a small amount of saline is injected, it can be confirmed that the puncture needle has safely entered the abdominal cavity. At this time, the abdominal wall thickness can be confirmed according to the scale.

[0052] Compared with the prior art, the trocar outer sheath tube assembly and the peritoneal end inserter of the ventriculoperitoneal shunt tube provided in this embodiment set the sheath tube assembly as an outer sheath tube and an inner sheath tube that are nested and relatively rotatable, and openings are provided on the side walls of both the outer sheath tube and the inner sheath tube. In this way, it is possible to realize the switching between two states of the sheath tube assembly, namely the side wall closed state and the side wall open state, through the relative rotation between the outer sheath tube and the outer sheath tube, and the shunt tube can be sent into the abdominal cavity along the sheath tube assembly in the side wall open state. The insertion device of the present application adopts the method of puncture and catheterization. Through a small incision of 5 mm in the abdominal wall, a single person can safely complete the catheterization operation at the peritoneal end within 10 minutes, which is time-saving, less traumatic, the patient has less pain, and recovers quickly. The bowel movement can resume and the patient can eat the next day, without affecting activities. It does not require laparoscopic assistance, the operation is simple, and it is convenient to confirm whether the peritoneum has been truly penetrated into the abdominal cavity after puncture.

[0053] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present application. It should be understood that the above description is only the specific embodiments of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An outer sheath assembly of an abdominal puncture device, characterized in that: The invention comprises an outer sheath tube (10) and an inner sheath tube (11), wherein the inner sheath tube (11) is rotatably arranged inside the outer sheath tube (10); the outer sheath tube assembly of the abdominal puncture device has a side wall closed state and a side wall open state; when the inner sheath tube (11) rotates inside the outer sheath tube (10), the outer sheath tube assembly of the abdominal puncture device can switch between the side wall closed state and the side wall open state, and the shunt tube can be sent into the abdominal cavity along the outer sheath tube assembly of the abdominal puncture device in the side wall open state.

2. The abdominal puncture device outer sheath assembly according to claim 1, characterized in that: The radial cross-section of the inner sheath tube (11) is a first circular arc, and the radial cross-section of the outer sheath tube (10) is a second circular arc. The first circular arc has a first central angle, the second circular arc has a second central angle, and the sum of the first central angle and the second central angle is greater than 360°.

3. The abdominal puncture device outer sheath assembly according to claim 2, characterized in that: 180°≤the first center angle≤270°, 180°<the second center angle≤270°.

4. The abdominal puncture device outer sheath assembly according to claim 3, characterized in that: The inner sheath tube (11) comprises an inner sheath front section (12) and an inner sheath rear section (13); The outer sheath tube (10) comprises an outer sheath front section (21) and an outer sheath rear section (22).

5. The abdominal puncture device outer sheath assembly according to claim 4, characterized in that: The inner sheath front section (12) comprises a head section (12-1) and a tail section (12-2), wherein the tail section (12-2) is connected to the inner sheath tail section (13), the cross section of the tail section (12-2) is 1 / 2 circle, the cross section of the head section (12-1) is 3 / 4 circle, and a natural transition is arranged between the head section (12-1) and the tail section (12-2).

6. The abdominal puncture device outer sheath assembly according to claim 4, characterized in that: A transverse slide groove (18) and a longitudinal slide groove (19) are provided on the side wall of the outer sheath tail section (22), wherein the longitudinal slide groove (19) is located below the transverse slide groove (18) and is connected to one end of the transverse slide groove (18); An inner sheath handle (14) is provided on the outer wall of the inner sheath tail section (13), and the inner sheath handle (14) can move in the transverse slide groove (18) and the longitudinal slide groove (19) to realize the rotation and up and down movement of the inner sheath tube (11) in the outer sheath tube (10).

7. The abdominal puncture device outer sheath assembly according to claim 1, characterized in that: An outer sheath tightening wrench (20) and a longitudinal tightening slit (17) are also provided on the outer wall of the outer sheath tube (10). The outer sheath tightening wrench (20) is configured to control the inner diameter of the outer sheath tube (10) by controlling the slit size of the longitudinal tightening slit (17), thereby clamping and releasing the shunt tube.

8. The abdominal puncture device outer sheath assembly according to claim 7, characterized in that: The outer sheath tube (10) comprises a first half tube (10-1) and a second half tube (10-2) which are symmetrically arranged; the first half tube (10-1) is provided with a first connecting plate (10-11), the second half tube (10-2) is provided with a second connecting plate (10-21), and the longitudinal tightening seam (17) is located between the first connecting plate (10-11) and the second connecting plate (10-21); a connecting rod (10-12) is vertically provided on the first connecting plate (10-11), a through hole is provided on the second connecting plate (10-21), an end of the connecting rod (10-12) passes through the through hole, and the end of the connecting rod (10-12) is rotatably connected to the outer sheath tightening wrench (20); When the outer sheath tightening wrench (20) is located at the initial position, the main body of the outer sheath tightening wrench (20) is parallel to the axis of the outer sheath tube (10), and at this time, the gap of the longitudinal tightening slit (17) is of the initial size; when the outer sheath tightening wrench (20) is rotated from the initial position to the horizontal state, the gap of the longitudinal tightening slit (17) gradually becomes smaller, and when it is rotated to the horizontal state, the gap of the longitudinal tightening slit (17) is the smallest.

9. The abdominal puncture device outer sheath assembly according to claim 1, characterized in that: The inner surface of the inner sheath tube (11) is provided with anti-slip threads; and / or The outer sheath front section (21) of the outer sheath tube (10) has an outer sheath head end, the inner surface of the outer sheath head end is provided with a diameter-reducing clamping layer (16), and the inclined surface of the diameter-reducing clamping layer (16) has an inner diameter that gradually decreases toward the port of the outer sheath head end.

10. A ventriculoperitoneal shunt catheter abdominal end inserter, characterized in that: include; A peritoneal puncture device (1) configured to puncture the abdominal cavity; The abdominal puncture device outer sheath assembly according to any one of claims 1 to 9 is configured to place an abdominal end shunt tube.

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