A device for inserting the abdominal end of a ventriculoperitoneal shunt tube

Abstract

The present application relates to a device for inserting the abdominal end of a ventriculoperitoneal shunt, which belongs to the technical field of medical devices. It solves the problem that the existing simple trocar insertion method cannot effectively protect deep organs and the shunt may be entangled or folded in the abdominal wall during insertion. A device for inserting the abdominal end of a ventriculoperitoneal shunt comprises: an abdominal puncture device for puncturing the abdominal cavity and a sheath assembly for placing the abdominal end shunt; the sheath assembly has an outer sheath and an inner sheath, and the inner sheath is rotatably arranged in the outer sheath; the side wall of the outer sheath is provided with an axially arranged first opening, and the side wall of the inner sheath is provided with an axially arranged second opening; when the inner sheath rotates in the outer sheath, the sheath assembly can switch between a side wall closed state and a side wall open state, and the shunt can be delivered into the abdominal cavity along the sheath assembly in the side wall open state. The present application adopts a puncture and catheterization method, which does not require laparoscopic assistance, is simple to operate, saves time, and has low trauma.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to a device for inserting the abdominal end of a ventriculoperitoneal shunt. Background Art

[0002] There are several main ways to place the ventricular-peritoneal shunt into the abdominal cavity: 1. Conventional laparotomy: This method is relatively traumatic (4-5 cm incision), time-consuming, difficult for obese patients, has many complications, and takes a long time to recover after surgery. 2. Laparoscopic-assisted placement: This method requires a laparoscope and the operator is familiar with laparoscopic operation. It is difficult to learn for neurosurgeons who are not general surgeons, requires high equipment, and is expensive. 3. Simple trocar: This method cannot effectively protect deep organs when puncturing the abdominal cavity; it cannot effectively confirm whether the peritoneum has been pierced; when placing the tube, the abdominal wall fat will squeeze into the tube sheath from the side groove, hindering the delivery of the tube, causing the shunt tube to spiral or fold in the abdominal wall.

[0003] In summary, the existing technology uses open abdominal placement to cause great trauma to patients, uses laparoscopic placement to require very high operator skills and is difficult to popularize, uses a simple trocar placement method to effectively protect deep organs, and the shunt tube may spiral or fold in the abdominal wall during placement. Therefore, it is urgent to provide a ventriculoperitoneal shunt tube abdominal end placement device to solve the above technical problems. Summary of the invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a device for inserting the abdominal end of a ventriculoperitoneal shunt tube, so as to solve the problems in the prior art that open abdominal insertion causes great trauma to the patient, laparoscopic-assisted insertion has very high requirements on the operator and is difficult to popularize, and that a simple trocar insertion method cannot effectively protect deep organs and the shunt tube may be entangled or folded in the abdominal wall during insertion.

[0005] The object of the present invention is achieved in that:

[0006] A device for inserting a ventriculoperitoneal shunt into the abdominal cavity, comprising:

[0007] a peritoneal puncture device configured to puncture the abdominal cavity;

[0008] A sheath assembly is configured to place an abdominal shunt tube; the sheath assembly comprises an outer sheath and an inner sheath, the inner sheath is rotatably arranged in the outer sheath; a first opening arranged axially is provided on the side wall of the outer sheath, and a second opening arranged axially is provided on the side wall of the inner sheath, the length of the first opening is equal to the axial length of the outer sheath, and the length of the second opening is equal to the axial length of the inner sheath;

[0009] Among them, when the inner sheath rotates in the outer sheath, the first opening and the second opening can be opposite and staggered, so that the sheath assembly can be switched between a side wall closed state and a side wall open state, and the shunt tube can be sent into the abdominal cavity along the sheath assembly in the side wall open state.

[0010] Furthermore, the radial cross-section of the inner sheath is a first circular arc, the radial cross-section of the outer sheath 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°.

[0011] Furthermore, 180°≤the first center angle≤270°, and 180°<the second center angle≤270°.

[0012] Furthermore, the inner sheath front section of the inner sheath tube has a head and a tail, the tail is connected to the inner sheath tail section of the inner sheath tube, the cross-section of the tail is 1 / 2 circle, the cross-section of the head is 3 / 4 circle, and a natural transition is set between the head and the tail.

[0013] Furthermore, a transverse slide groove and a longitudinal slide groove are provided on the side wall of the outer sheath tail section of the outer sheath tube, and the longitudinal slide groove is located below the transverse slide groove and is connected to one end of the transverse slide groove; an inner sheath handle is provided on the outer wall of the inner sheath tail section, and the inner sheath handle can move in the transverse slide groove and the longitudinal slide groove to realize the rotation and up and down movement of the inner sheath tube in the outer sheath tube.

[0014] Furthermore, an outer sheath tightening wrench and a longitudinal tightening slit are 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 gap size of the longitudinal tightening slit, thereby clamping and releasing the shunt tube.

[0015] Furthermore, the outer sheath tube includes a first half tube and a second half tube arranged symmetrically, the first half tube is provided with a first connecting plate, the second half tube is provided with a second connecting plate, and 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, and 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 an initial position, the main body of the outer sheath tightening wrench is parallel to the axis of the outer sheath tube, and at this time, the gap of the longitudinal tightening seam is an initial size; when the outer sheath tightening wrench rotates from the initial position to a 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 is rotated to a horizontal state.

[0016] Furthermore, the inner surface of the inner sheath tube is provided with anti-slip threads.

[0017] Furthermore, the outer sheath front section of the outer sheath tube has an outer sheath head end, the inner surface of the outer sheath head end is provided with a diameter-reducing clamping layer, and the inclined surface of the diameter-reducing clamping layer has an inner diameter that gradually decreases toward the port of the outer sheath head end.

[0018] Furthermore, the abdominal puncture device includes a needle body, a needle belly and a needle tail, and a locking pin is provided between the needle body and the needle belly, and the locking pin is configured to control the locking and unlocking of the sheath tube assembly and the abdominal puncture device.

[0019] Furthermore, the locking pin has a locking pin body and two arc-shaped clamping plates, the two arc-shaped clamping plates are symmetrically arranged on the outer peripheral wall of the locking pin body, and the locking pin body connects the needle body and the needle belly; the outer sheath tail section of the outer sheath tube is provided with two symmetrically arranged clamping grooves, and there are two notches between the two clamping grooves. The two arc-shaped clamping plates can be inserted into the clamping grooves to lock the abdominal puncture device, and the abdominal puncture device can be unlocked by rotating to the two notches.

[0020] Furthermore, the needle body includes an outer needle sheath and an internal needle core, the rear of the needle sheath is connected to the outer wall of the needle belly, the outer diameter of the needle sheath is larger than the outer diameter of the standard shunt tube, the length of the needle sheath is shorter than the length of the needle core, the tail end of the needle core is connected to the spring inside the needle belly, and the tail end of the spring is fixed to the inner wall of the tail end of the needle belly.

[0021] Furthermore, the needle tail is configured as a standard syringe interface for connecting a syringe.

[0022] Furthermore, the front end of the needle sheath is beveled so as to be able to cut the abdominal wall tissue when the needle core is retracted; and the front end of the needle core is round and blunt.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] a) The device for inserting the ventriculoperitoneal shunt at the abdominal end provided by the present invention sets the sheath assembly to an outer sheath and an inner sheath that are nested and relatively rotatable, and the side walls of the outer sheath and the inner sheath are both provided with openings, so that the sheath assembly can be switched between a closed side wall state and an open side wall state through the relative rotation between the outer sheath and the outer sheath, and the shunt can be delivered into the abdominal cavity along the sheath assembly in the open side wall state. The insertion device of the present application adopts a puncture catheterization method, which can be passed through a small incision of 5mm in the abdominal wall. A single person can safely complete the catheterization operation at the abdominal end within 10 minutes, which is time-saving and less traumatic, and the patient has less pain and recovers quickly. The patient can resume intestinal peristalsis and eat on the next day without affecting activities. No laparoscopic assistance is required, and the operation is simple. After the puncture is completed, it can be conveniently confirmed whether the peritoneum has been truly broken through to enter the abdominal cavity.

[0025] b) The device for inserting the ventriculoperitoneal shunt into the abdominal cavity provided by the present invention has the function of delivering the shunt. When the inner sheath is rotated into place, the shunt can continue to be clamped and delivered to a deep position to complete the operation of delivering the tube into the abdominal cavity, thereby preventing the shunt from being retained in the abdominal wall and avoiding the shunt from being entangled and folded in the abdominal wall.

[0026] c) The device for inserting the ventriculoperitoneal shunt into the abdominal cavity provided by the present invention has a puncture protection function. The front end of the needle sheath is beveled, which can cut the abdominal wall tissue when the needle core is retracted. The length of the needle sheath is shorter than the length of the needle core. The tail end of the needle core is connected to the spring in the needle belly. The front end of the needle core is round and blunt, which can effectively protect the abdominal organs during puncture and avoid puncture damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 A schematic diagram of the structure of the abdominal end insertion device of the ventriculoperitoneal shunt provided by the present invention from a first angle;

[0029] Figure 2 A second angle structural schematic diagram of the device for inserting the peritoneal end of a ventriculoperitoneal shunt provided by the present invention;

[0030] Figure 3 A schematic diagram of the partial structure of the device for inserting the peritoneal end of a ventriculoperitoneal shunt provided by the present invention;

[0031] Figure 4 A schematic diagram of the overall structure of the abdominal puncture device provided by the present invention;

[0032] Figure 5 A schematic diagram of the connection structure between the tail end of the needle core of the abdominal puncture device provided by the present invention and the spring inside the needle belly;

[0033] Figure 6 A schematic diagram of the structure of the inner sheath tube provided by the present invention;

[0034] Figure 7 A schematic diagram of the structure of the outer sheath tube provided by the present invention;

[0035] Figure 8 It is a schematic diagram of the sheath tube assembly in a side wall open state after the inner sheath handle is rotated according to the present invention;

[0036] Fig. 9 It is a schematic diagram of the state in which the inner sheath tube extends forward from the outer sheath tube after the inner sheath handle is pushed down according to the present invention;

[0037] Fig.10 It is a schematic diagram of the state of controlling the tightening of the outer sheath tube by the outer sheath tightening wrench of the present invention;

[0038] Fig.11 A schematic diagram of the structure of the connection between the locking pin and the outer sheath provided by the present invention;

[0039] Fig.12 A schematic diagram of a structure in which a diameter-reducing clamping layer is arranged on the inner wall of the front section of the outer sheath provided by the present invention;

[0040] Fig.13 A schematic diagram of the connection structure between the outer sheath tightening wrench provided by the present invention and the first connecting plate and the second connecting plate.

[0041] Reference numerals:

[0042] 1. Abdominal puncture device; 2. Sheath assembly; 3. Needle body; 4. Needle belly; 5. Needle tail; 6. Lock pin; 6-1. Lock pin body; 6-2. Arc-shaped clamping plate; 7. Needle sheath; 8. Needle core; 9. Spring; 10. Outer sheath; 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; 12. Front section of inner sheath; 12-1. Head; 12-2. Tail; 13. Tail section of inner sheath; 14. Inner sheath handle; 15. Slot; 16. Reduction clamping layer; 17. Longitudinal tightening seam; 18. Horizontal slide groove; 19. Longitudinal slide groove; 20. Outer sheath tightening wrench; 21. Front section of outer sheath; 22. Tail section of outer sheath. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0045] 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.

[0046] Example 1

[0047] A specific embodiment of the present invention, as Figures 1 to 13 As shown, a device for inserting a ventriculoperitoneal shunt into the abdominal cavity is disclosed, comprising:

[0048] An abdominal puncture device 1, wherein the abdominal puncture device 1 is configured to puncture the abdominal cavity;

[0049] A sheath tube assembly 2, wherein the sheath tube assembly 2 is configured to place a shunt tube at the abdominal end; the sheath tube assembly 2 comprises an outer sheath tube 10 and an inner sheath tube 11, wherein the inner sheath tube 11 is rotatably arranged in the outer sheath tube 10, and the outer sheath tube 10 and the inner sheath tube 11 can be nested with each other to form a complete sheath tube; an axially arranged first opening is arranged on the side wall of the outer sheath tube 10, and an axially arranged second opening is arranged on the side wall of the inner sheath tube 11, wherein 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 comprises Side wall closed state and 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 opposite and staggered, when 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, thus forming a sheath tube assembly 2 in a side wall closed state; 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. When the inner sheath tube 11 rotates into place, the shunt tube can continue to be clamped and sent 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.

[0050] In one optional embodiment, the radial cross section of the inner sheath tube 11 is a first circular arc, 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°. Furthermore, 180°≤the first central angle≤270°, and 180°<the second central angle≤270°.

[0051] In this embodiment, the inner sheath tube 11 has an inner sheath front section 12 and an inner sheath tail section 13, wherein the inner sheath front section 12 is made of a soft material, such as 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, and the outer sheath tail section 22 is enlarged and open at the front, so as to facilitate the insertion of a shunt tube. Optionally, the outer sheath tube 10 can be made of a polycarbonate material.

[0052] In one of optional implementations, described inner sheath leading section 12 has head 12-1 and afterbody 12-2, the afterbody 12-2 of inner sheath leading section 12 is connected with described inner sheath afterbody 13, the cross section of the afterbody 12-2 of inner sheath leading section 12 is 1 / 2 circle, the cross section of the head 12-1 of inner sheath leading section 12 is 3 / 4 circle, and natural transition is arranged between described head 12-1 and afterbody 12-2.That is to say, from head 12-1 to afterbody 12-2 direction, the length of the radial cross-section girth of inner sheath leading section 12 gradually evenly decreases, also can be understood as, after inner sheath leading section 12 is spread out on plane, the shape of inner sheath leading section 12 that plane spreads out is trapezoidal, and two bases of trapezoidal are equal to 1 / 2 circumference and 3 / 4 circumference respectively. Such a design allows the inner sheath 11 to be rotated to open the sheath assembly, and the sheath assembly is gradually opened from the tail 12-2 to the head 12-1, which helps to prevent abdominal wall fat from entering the sheath during the catheterization process and causing obstruction.

[0053] In one of the optional embodiments, a transverse slot 18 is provided on the back of the outer sheath tail section 22, and the end is connected to a longitudinal slot 19, and the inner sheath handle 14 can slide in the two slots, so as to realize the operation of rotating and moving the inner sheath to the deep part. Specifically, a transverse slot 18 and a longitudinal slot 19 are provided on the side wall of the outer sheath tail section 22, and the longitudinal slot 19 is located below the transverse slot 18 and is connected to one end of the transverse slot 18; an inner sheath handle 14 extending outward is provided on the outer wall of the inner sheath tail section 13, and the inner sheath handle 14 can move in the transverse slot 18 and the longitudinal slot 19 to realize the rotation and up and down movement of the inner sheath tube 11 in the outer sheath tube 10. For example, the inner sheath handle 14 can be held by hand to rotate the inner sheath tube 11, so that the sheath tube assembly 2 is switched from the side wall closed state to the side wall open state, which is convenient for the insertion and removal of the shunt tube.

[0054] In one optional embodiment, an outer sheath tightening wrench 20 and a longitudinal tightening slit 17 are further provided on the outer wall of the outer sheath tube 10, and the outer sheath tightening wrench 20 is configured to control the inner diameter of the outer sheath tube 10 by controlling the gap size of the longitudinal tightening slit 17, thereby achieving clamping and releasing the shunt tube. By providing the longitudinal tightening slit 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, thereby achieving effective clamping and release of the inner sheath on the shunt tube.

[0055] Specifically, the outer sheath leading section 21 of the outer sheath tube 10 comprises the first half pipe 10-1 and the second half pipe 10-2 of symmetrical arrangement, and the first half pipe 10-1 and the second half pipe 10-2 are connected to form the outer sheath leading section 21 of the outer sheath tube 10, and there is a longitudinal contraction seam 17 with adjustable distance between the two. The first half pipe 10-1 and the second half pipe 10-2 are connected by a rotatable axle pin joint, and the tail end of the first half pipe 10-1 is separated from the outer sheath tail section 22 of the outer sheath tube 10 by a design. The length of the longitudinal contraction seam 17 is equal to the length of the leading section 21, and the outer sheath tail section 22 no longer has a contraction seam. The first half pipe 10-1 of the outer sheath tube is connected with the second half pipe 10-2 by the axle pin joint between the two. Specifically: the outer sheath tail section 22 is integrated with the front half pipe 10-2, and the first half pipe 10-1 is connected with the second half pipe 10-2 by an axle pin joint. Exemplarily, the axle pin joint includes a first connecting plate 10-11, a second connecting plate 10-21 and a connecting rod 10-12. Specifically, the first half tube 10-1 is provided with a first connecting plate 10-11, and the second half tube 10-2 is provided with a second connecting plate 10-21. The longitudinal tightening seam 17 is located between the first connecting plate 10-11 and the second connecting plate 10-21; the first connecting plate 10-11 is vertically provided with a connecting rod 10-12, and the second connecting plate 10-21 is provided with a through hole, 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 When the outer sheath tightening wrench 20 is in the horizontal position, the main body of the outer sheath tightening wrench 20 is parallel to the axis of the outer sheath tube 10, and the gap of the longitudinal tightening seam 17 is at its 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 axle pin joint, so that it and the second connecting plate 10-21 can approach each other, and when the outer sheath tightening wrench 20 is rotated from the initial position to the horizontal state, the gap of the longitudinal tightening seam 17 gradually becomes smaller, and when it is rotated to the horizontal state, the gap of the longitudinal tightening seam 17 is the smallest, so that the clamping effect can be adjusted by adjusting the gap size of the longitudinal tightening seam 17.

[0056] In one optional embodiment, the inner surface of the inner sheath tube 11 is provided with anti-slip threads to increase friction.

[0057] In one of the optional embodiments, the inner surface of the inner sheath tube 11 is provided with an anti-slip thread, and the inner surface of the head end of the outer sheath tube 10 has a bevel design, which gradually reduces the inner diameter. Specifically, the outer sheath front section 21 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 reducing clamping layer 16, and the inclined surface of the reducing clamping layer 16 has an inner diameter gradually reduced toward the port of the outer sheath head end. In other words, the inner surface of the outer sheath head end of the outer sheath tube 10 is located on a chamfered prism table, which is a part of the chamfered prism table, and the inner surface inner diameter at the outermost end port of the outer sheath head end is the smallest and is smaller than the inner diameter of the outer sheath front section 21; the inner surface inner diameter at the outermost end port of the outer sheath head end is equal to the inner diameter of the outer sheath front section 21. Therefore, when the inner sheath tube 11 moves to the deep part, the inner diameter will be narrowed by the influence of the bevel, thereby achieving the purpose of clamping the shunt tube to move to the deep part.

[0058] In this embodiment, the abdominal puncture device 1 and the sheath tube assembly 2 are nested with each other and connected by a locking pin 6. After the abdominal puncture is successful, after unlocking the locking pin 6 of the sheath tube assembly 2 and the abdominal puncture device 1, the sheath tube assembly 2 can safely enter the abdominal cavity under the guidance of the abdominal puncture device 1. At this time, the abdominal puncture device 1 is withdrawn and the sheath tube is used to assist the catheterization operation.

[0059] Among them, the abdominal puncture device 1 is used for safely puncturing the abdominal cavity. The abdominal puncture device 1 includes a needle body 3, a needle belly 4 and a needle tail 5. A locking pin 6 is provided between the needle body 3 and the needle belly 4. The locking pin 6 is configured to control the locking and unlocking of the sheath assembly 2 and the abdominal puncture device 1.

[0060] For example, Fig.11 As shown, the locking pin 6 has a locking pin body 6-1 and two arc-shaped clamping plates 6-2, and the two arc-shaped clamping plates 6-2 are symmetrically arranged on the outer peripheral wall of the locking pin body 6-1, and the locking pin body 6-1 connects the needle body 3 and the needle belly 4; the outer sheath tail section 22 of the outer sheath tube 10 is provided with two symmetrically arranged clamping grooves 15, and the two clamping grooves 15 are symmetrically arranged at the top of the inner wall of the outer sheath tail section 22, and the arc-shaped clamping plate 6-2 can rotate in the clamping groove 15, and there are two notches between the two clamping grooves 15, and the two arc-shaped clamping plates 6-2 can be inserted into the clamping groove 15 to lock the abdominal puncture device 1, and the abdominal puncture device 1 can be unlocked by rotating to the two notches.

[0061] 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 belly 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 the spring 9 in the needle belly 4. The tail end of the spring 9 is fixed to the inner wall of the tail end of the needle belly 4. The front end of the needle sheath 7 is sharp and slightly shorter than the needle core 8. The needle core 8 is hollow, the front end of the needle core 8 is round and blunt, and the side is open, which is slightly longer than the needle sheath 7. The front end of the needle sheath 7 is beveled, which can cut the abdominal wall tissue when the needle core 8 is retracted. Optionally, the needle tail 5 is connected to the needle belly 4, and the needle tail 5 is set as a standard syringe interface for connecting a syringe.

[0062] During puncture, due to the resistance of the abdominal wall tissue, the needle core 8 will be slightly pushed back into the needle sheath 7, so that the sharp front end of the needle sheath 7 can cut the abdominal wall tissue. Once entering the abdominal cavity, the front resistance disappears, and the needle core 8 will return to its original position under the push of the rear spring 9, exceeding the needle sheath 7. Since the front end of the needle core 8 is round and blunt, it can effectively protect deep organs after the needle tip enters the abdominal cavity. At this time, the operator can connect the syringe interface of the needle tail 5 with a syringe containing sterile saline water. When the air can be extracted and a small amount of saline is injected without resistance, it can be confirmed that the puncture needle has safely entered the abdominal cavity. At this time, the thickness of the abdominal wall can be confirmed according to the scale.

[0063] Compared with the prior art, the device for inserting the peritoneal end of the ventriculoperitoneal shunt provided in this embodiment has the following beneficial effects:

[0064] 1. The sheath assembly is configured to have an outer sheath and an inner sheath that are nested and relatively rotatable, and the side walls of the outer sheath and the inner sheath are both provided with openings, so that the sheath assembly can be switched between a closed side wall state and an open side wall state through relative rotation between the outer sheath and the outer sheath, and the shunt tube can be delivered into the abdominal cavity along the sheath assembly in the open side wall state. The insertion device of the present application adopts a puncture catheterization method, which can be passed through a small incision of 5mm in the abdominal wall. A single person can safely complete the catheterization operation at the abdominal end within 10 minutes, which is time-saving and less traumatic, and the patient has less pain and recovers quickly. Intestinal peristalsis and eating can be restored the next day without affecting activities. No laparoscopic assistance is required, and the operation is simple. After the puncture is completed, it can be conveniently confirmed whether the peritoneum has been truly broken through to enter the abdominal cavity.

[0065] 2. It has the function of shunt tube delivery. When the inner sheath is rotated into place, the shunt tube can continue to be clamped and delivered to the deep part to complete the operation of delivering the tube to the abdominal cavity. It can prevent the shunt tube from being retained in the abdominal wall and avoid the shunt tube from circling and folding in the abdominal wall.

[0066] 3. It has puncture protection function. The front end of the needle sheath is beveled, which can cut the abdominal wall tissue when the needle core is retracted. The length of the needle sheath is shorter than the length of the needle core. The tail end of the needle core is connected to the spring inside the needle belly. The front end of the needle core is round and blunt, which can effectively protect the abdominal organs during puncture and avoid puncture damage.

[0067] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A device for inserting a ventriculoperitoneal shunt into the abdominal cavity, characterized in that: include: A peritoneal puncture device (1) configured to puncture the abdominal cavity; A sheath tube assembly (2) is configured to place an abdominal shunt tube; the sheath tube assembly (2) comprises an outer sheath tube (10) and an inner sheath tube (11), the inner sheath tube (11) being rotatably disposed in the outer sheath tube (10); a first opening arranged axially is provided on the side wall of the outer sheath tube (10), and a second opening arranged axially is provided on the side wall of the inner sheath tube (11); 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, when the inner sheath tube (11) rotates in the outer sheath tube (10), the first opening and the second opening can be aligned and staggered, so that the sheath tube assembly (2) can be switched between a side wall closed state and a side wall open state, and the shunt tube can be delivered into the abdominal cavity along the sheath tube assembly (2) in the side wall open state; 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.

2. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 1, characterized in that: The radial cross-section of the inner sheath tube (11) is a first circular arc, 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 device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 2, characterized in that: The inner sheath front section (12) of the inner sheath tube (11) comprises a head section (12-1) and a tail section (12-2); the tail section (12-2) is connected to the inner sheath tail section (13) of the inner sheath tube (11); 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).

4. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 3, 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) of the outer sheath tube (10), and 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) is movable 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).

5. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 1, characterized in that: 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.

6. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to any one of claims 1 to 5, characterized in that: The abdominal puncture device (1) comprises a needle body (3), a needle belly (4) and a needle tail (5), a locking pin (6) is provided between the needle body (3) and the needle belly (4), and the locking pin (6) is configured to control the locking and unlocking of the sheath tube assembly (2) and the abdominal puncture device (1).

7. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 6, characterized in that: The locking pin (6) comprises a locking pin body (6-1) and two arc-shaped clamping plates (6-2), wherein the two arc-shaped clamping plates (6-2) are symmetrically arranged on the outer peripheral wall of the locking pin body (6-1), and the locking pin body (6-1) connects the needle body (3) and the needle belly (4); The outer sheath tail section (22) of the outer sheath tube (10) is provided with two symmetrically arranged slots (15), with two notches between the two slots (15); two arc-shaped clamping plates (6-2) can be inserted into the slots (15) to lock the abdominal puncture device (1), and the abdominal puncture device (1) can be unlocked by rotating to the two notches.

8. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 7, characterized in that: The needle body (3) comprises 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 belly (4); the outer diameter of the needle sheath (7) is larger than the outer diameter of a 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) in the needle belly (4); and the tail end of the spring (9) is fixed to the inner wall of the tail end of the needle belly (4).

9. The device for inserting the ventriculoperitoneal shunt into the abdominal cavity according to claim 6, characterized in that: The needle tail (5) is configured as a standard syringe interface for connecting a syringe.

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