CN111281626A

CN111281626A - Claw-shaped bile duct and pancreas stent taking-out instrument

Info

Publication number: CN111281626A
Application number: CN202010130307.9A
Authority: CN
Inventors: 朱坚刚
Original assignee: Changzhou Second Peoples Hospital
Current assignee: Changzhou Second Peoples Hospital
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-06-16

Abstract

The invention relates to the field of medical equipment, in particular to a claw-shaped bile duct and pancreas stent taking-out instrument, which comprises an outer sheath tube, wherein a piston cavity is arranged at the left end part of the outer sheath tube, the lower end of the piston cavity is communicated with a guide tube, the other end of the guide tube penetrates out of the right end of the outer sheath tube, an air bag assembly is arranged at the other end of the guide tube, a cavity ejecting piece is arranged at the upper end of the piston cavity, the lower side of the cavity ejecting piece is connected with a piston piece matched with the piston cavity through a spring, a connecting rod is arranged at the upper side of the piston piece, the upper end of the connecting rod penetrates out of the cavity ejecting piece, a moving disc is integrally arranged at the upper end of the connecting rod, a plurality of groups; according to the invention, the biliary tract stent is hooked and taken out from the inner side of the biliary tract stent through the claw hook, so that the pipeline at the implanted part is prevented from being enlarged, the difficulty of taking the biliary tract stent by the claw hook is reduced, and the damage to the focus of the pipeline is avoided.

Description

Claw-shaped bile duct and pancreas stent taking-out instrument

Technical Field

The invention relates to the field of medical instruments, in particular to a claw-shaped bile duct and pancreas stent taking-out instrument.

Background

Biliary obstruction refers to mechanical obstruction of bile duct caused by bile drainage disorder and even complete blockage of any segment of bile discharge duct due to bile duct intracavity lesion, wall disease, and infiltration and compression outside the wall. The symptoms of jaundice are accompanied by vague pain in the upper abdomen, cold fever, abdominal pain is mainly distending pain and colic, sometimes colic is a remarkable symptom, and the symptoms of acute and subacute symptoms generally appear in the past with repeated attacks.

At present, a better method for treating biliary obstruction is to implant a biliary stent into a narrow or blocked part, so that the biliary stent can play roles in pressure reduction drainage, support and benefiting healing of biliary tracts. When the bile duct obstruction disappears or the biliary tract recovers, the biliary tract stent needs to be taken out of the implantation position, and the implanted stent usually has a migration phenomenon, so that the biliary tract stent is difficult to take out. Therefore, the currently common technical means is to take out the stent by using a snare or biopsy forceps, but the force applying position is mostly parallel to the depth direction of the stent, so that the force applying position is difficult, and the taking out is difficult.

In the prior art, for example, a claw-shaped bile duct and pancreas stent removing apparatus disclosed in patent No. CN201811541466.7, a curved biliary tract stent in the depth direction can be conveniently removed by designing a multi-claw structure and using an outer sheath made of a flexible tube.

However, the above invention has the following defects and shortcomings in the application process:

the claw hook of the multi-claw structure adopts a hook head which is inclined inwards, if the biliary tract stent is to be hooked, the claw hook hooks the biliary tract stent from the outer side of the biliary tract stent, namely the claw hook firstly props up a pipeline at the biliary tract stent embedding part, enlarges the pipeline at the embedding part, then the claw hook crosses the enlarged pipeline to enter the front side of the biliary tract stent, and then retracts the claw hook, so that the claw hook hooks take the biliary tract stent; however, the biliary stent is required to be expanded at the implantation site, which may cause the biliary stent to be separated from the tract of the implantation site, so that the biliary stent cannot be in a position perpendicular to the claw hook, i.e., the biliary stent may be changed from an initial position perpendicular to the longitudinal direction of the tract to a position inclined to the tract, or even in a position perpendicular to the horizontal direction of the tract, thereby being inconvenient for the claw hook to hook the biliary stent, increasing the difficulty of hooking, and expanding the tract of the implantation site, which may cause damage to the lesion site of the tract.

Disclosure of Invention

Solves the technical problem

Aiming at the defects in the prior art, the invention provides a claw-shaped bile duct and pancreas stent taking-out instrument, which can effectively solve the problems that the hooking of a biliary duct stent by a multi-claw structure in the prior art causes the enlargement of a duct at an implanted part, the biliary duct stent is not convenient to hook by a claw hook, the hooking difficulty is increased, and the lesion of the duct is possibly damaged.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

a claw-shaped bile duct and pancreas stent taking-out instrument comprises an outer sheath tube, wherein a piston cavity is arranged at the left end part of the outer sheath tube, a guide tube is communicated with the lower end of the piston cavity, the other end of the guide tube penetrates out of the right end of the outer sheath tube, an air bag assembly is arranged at the other end of the guide tube, a cavity ejecting piece is arranged at the upper end of the piston cavity, a piston piece matched with the piston cavity is connected to the lower side of the cavity ejecting piece through a spring, a connecting rod is arranged at the upper side of the piston piece, the upper end of the connecting rod penetrates out of the cavity ejecting piece, a moving disc is integrally arranged at the upper end of the connecting rod, a plurality of groups of taking-out pieces are uniformly obliquely and rotatably connected to the upper side of the moving disc, claw hooks are obliquely arranged at the top ends of the taking-out pieces, notches of the claw hooks are all facing outwards, the taking-out pieces penetrate through the limiting plates through the inclined holes on the same side of the taking-out pieces.

Furthermore, the air bag assembly comprises an air bag, an air valve arranged at the joint of the air bag and the other end of the guide pipe and a one-way air inlet valve arranged at the top end of the air bag, when the air valve is closed, the air bag can be continuously pressed, the air valve and the air bag are elastically restored, the external air guide pipe is used for filling air into the piston cavity, and when the air valve is opened, the air in the piston cavity can be discharged.

Furthermore, the through hole in clearance fit with the connecting rod is formed in the axis of the cavity top piece, the connecting rod penetrates through the through hole and penetrates out of the cavity top piece, and the stability of the connecting rod in up-and-down movement is improved through limitation of the through hole on the connecting rod.

Furthermore, a plurality of groups of sliding grooves are uniformly formed in the circumferential side wall of the movable disc, sliding blocks matched with the sliding grooves are uniformly arranged on the circumferential inner wall of the left end of the outer sheath tube, and the stability of the movable disc in moving up and down is improved through the matching of the sliding grooves and the sliding blocks.

Furthermore, a plurality of trapezoidal grooves of group have evenly been seted up to the removal dish upside, and trapezoidal inslot all is provided with the axostylus axostyle, it all is provided with the sleeve of being connected with the axostylus axostyle rotation to take out a bottom, through axostylus axostyle and telescopic cooperation, realizes taking out a rotation that is connected with the removal dish.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

the invention has simple structure and convenient operation, reduces the mutual collision between the claw hook and the biliary tract stent caused by directly entering the inner side of the biliary tract stent by arranging the claw hook at the top end of the taking-out piece in an inclined way, further reduces the wandering of the biliary tract stent, is convenient for the claw hook to enter the inner side of the biliary tract stent, and ensures that the claw hook can hook and take out the biliary tract stent from the inner side of the biliary tract stent by designing each group of claw hooks outwards, thereby avoiding expanding the pipeline at the position where the claw hook is placed to a certain extent, not only reducing the difficulty of taking out the biliary tract stent by the claw hook, but also avoiding the damage to the focus of the pipeline.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the left end of the sheath according to the present invention;

FIG. 3 is an enlarged schematic view of the structure at A of the present invention;

FIG. 4 is a schematic view of the connection between the movable plate and the plurality of sets of take-out members according to the present invention;

FIG. 5 is a schematic view of a movable plate according to the present invention;

FIG. 6 is a schematic view of a take-out member of the present invention;

the reference numerals in the drawings denote: 1-sheath canal; 2-a piston chamber; 3-a catheter; 4-a cavity top piece; 5-a spring; 6-a piston member; 7-a connecting rod; 8-moving the disc; 9-taking out the part; 10-a claw hook; 11-a limiting plate; 12-an inclined hole; 13-an air bag; 14-a gas valve; 15-one-way intake valve; 16-a chute; 17-a slide block; 18-a trapezoidal groove; 19-shaft rod; 20-sleeve.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Examples

The claw-shaped bile duct and pancreas stent removing device of the embodiment is shown in the figures 1 to 6: comprises an outer sheath tube 1, a piston cavity 2 is arranged at the left end part of the outer sheath tube 1, a guide tube 3 is communicated with the lower end of the piston cavity 2, the other end of the guide tube 3 penetrates out of the right end of the outer sheath tube 1, an air bag component is arranged at the other end of the guide tube 3, a cavity ejecting part 4 is arranged at the upper end of the piston cavity 2, a piston part 6 matched with the piston cavity 2 is connected with the lower side of the cavity ejecting part 4 through a spring 5, a connecting rod 7 is arranged at the upper side of the piston part 6, the upper end of the connecting rod 7 penetrates out of the cavity ejecting part 4, a movable disc 8 is integrally arranged at the upper end of the connecting rod 7, a plurality of groups of taking-out parts 9 are uniformly obliquely and rotatably connected with the upper end of the movable disc 8, claw hooks 10 are uniformly and obliquely arranged at the top ends of the taking-out parts 9, notches of the claw hooks 10 all face outwards, the extension line at the lower end of the, the take-off elements 9 each pass through and out of the limit plate 11 through an inclined hole 12 on the same side as the take-off elements.

The air bag assembly comprises an air bag 13, an air valve 14 arranged at the joint of the air bag 13 and the other end of the guide pipe 3 and a one-way air inlet valve 15 arranged at the top end of the air bag 13, the air bag 13 can be continuously pressed after the air valve 14 is closed, the external air guide pipe 3 is filled with air to the piston cavity 2 through the elastic recovery of the one-way air inlet valve 15 and the air bag 13, and the air in the piston cavity 2 can be discharged after the air valve 14 is opened.

The through hole in clearance fit with connecting rod 7 is seted up in cavity top member 4 axle center, and connecting rod 7 passes through the through hole and wears out cavity top member 4, and through the injecing of through hole to connecting rod 7, the stability that connecting rod 7 reciprocated is improved.

A plurality of groups of sliding grooves 16 are uniformly formed in the circumferential side wall of the movable disc 8, sliding blocks 17 matched with the sliding grooves 16 are uniformly arranged on the circumferential inner wall of the left end part of the outer sheath tube 1, and the stability of the movable disc 8 in moving up and down is improved through the matching of the sliding grooves 16 and the sliding blocks 17.

Remove 8 upsides of dish and evenly seted up a plurality of groups of trapezoidal groove 18, all be provided with axostylus axostyle 19 in the trapezoidal groove 18, take out 9 bottoms and all be provided with the sleeve 20 of being connected with axostylus axostyle 19 rotation, through the cooperation of axostylus axostyle 19 with sleeve 20, realize taking out 9 and be connected with the rotation of removing dish 8.

When in use, the left end part of the outer sheath tube 1 is moved to the position of the pipeline of the biliary tract stent implantation position, the piston cavity 2 is inflated by the air bag component, so that the air pressure in the piston cavity 2 is gradually increased, when the air pressure in the piston cavity is larger than the elastic extrusion force of the spring 5 to the piston piece 6, the piston piece 6 is pushed to move upwards, so that the distance between a plurality of groups of claw hooks 10 can be enlarged by controlling the air pressure in the piston cavity 2, adjusting the moving distance of the piston piece 6, driving the moving disc 8 to move upwards by the connecting rod 7, further moving a plurality of groups of taking-out pieces 9 along respective inclined holes 12, at the moment, each group of claw hooks 10 extend into the inner side of the biliary tract stent, then controlling the air pressure in the piston cavity 2, making the moving disc 8 slightly move upwards, making the circular inner diameter formed by a plurality of groups of claw hooks 10 slightly larger than the inner diameter of the biliary tract stent, and then pulling the outer, so that the claw hook 10 can hook the biliary tract stent from the inner side of the biliary tract stent and take out the biliary tract stent.

The device is simple in structure and convenient to operate, the claw hooks 10 are obliquely arranged at the top end of the taking-out part 9, the collision between the claw hooks 10 and the biliary tract bracket caused by the fact that the claw hooks 10 directly enter the inner side of the biliary tract bracket is reduced, the migration of the biliary tract bracket is further reduced, the claw hooks 10 can conveniently enter the inner side of the biliary tract bracket, and each group of claw hooks 10 are designed outwards, so that the claw hooks 10 can hook and take out the biliary tract bracket from the inner side of the biliary tract bracket, the pipeline of an embedded part can be prevented from being enlarged to a certain extent, the difficulty of taking the biliary tract bracket by the claw hooks 10 is reduced, and the damage to the focus of the pipeline is avoided; simultaneously through the design of spring 5, when not aerifing in piston cavity 2, spring 5 can guarantee that piston piece 6 can not produce when the sheath pipe 1 gets into patient's health and remove to the elastic extrusion force of piston piece 6, thereby make claw hook 10 stabilize at sheath pipe 1 left port, and then be convenient for claw hook 10 follow-up operation.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The utility model provides a claw shape bile duct and pancreas support take out apparatus, includes sheath pipe (1), its characterized in that: the left end part of the outer sheath pipe (1) is provided with a piston cavity (2), the lower end of the piston cavity (2) is communicated with a guide pipe (3), the other end of the guide pipe (3) penetrates out of the right end of the outer sheath pipe (1), the other end of the guide pipe (3) is provided with an air bag component, the upper end of the piston cavity (2) is provided with a cavity ejecting part (4), the lower side of the cavity ejecting part (4) is connected with a piston part (6) matched with the piston cavity (2) through a spring (5), the upper side of the piston part (6) is provided with a connecting rod (7), the upper end of the connecting rod (7) penetrates out of the cavity ejecting part (4), the upper end of the connecting rod (7) is integrally provided with a movable disc (8), the upper side of the movable disc (8) is uniformly obliquely and rotatably connected with a plurality of groups of taking-out parts (9), the top ends of the taking-out parts (9) are obliquely provided with claw hooks (10), the sheath pipe (1) left end is provided with limiting plate (11), and limiting plate (11) are kept away from axle center department and evenly are provided with and take out piece (9) clearance fit's inclined hole (12), take out piece (9) and all pass and wear out limiting plate (11) through rather than the inclined hole (12) of homonymy.

2. The instrument for removing the claw-shaped bile duct and the pancreatic stent as claimed in claim 1, wherein the balloon assembly comprises a balloon (13), a gas valve (14) arranged at the joint of the balloon (13) and the other end of the catheter (3), and a one-way gas inlet valve (15) arranged at the top end of the balloon (13).

3. The instrument for removing the claw-shaped bile duct and the pancreatic stent as claimed in claim 1, wherein the axis of the cavity top member (4) is provided with a through hole which is in clearance fit with the connecting rod (7), and the connecting rod (7) passes through the through hole and penetrates out of the cavity top member (4).

4. The instrument for extracting the claw-shaped bile duct and the pancreatic stent as claimed in claim 1, wherein the circumferential side wall of the moving disc (8) is uniformly provided with a plurality of groups of sliding grooves (16), and the circumferential inner wall of the left end of the outer sheath tube (1) is uniformly provided with sliding blocks (17) matched with the sliding grooves (16).

5. The instrument for extracting the claw-shaped bile duct and the pancreatic stent as claimed in claim 1, wherein a plurality of groups of trapezoidal grooves (18) are uniformly formed in the upper side of the moving plate (8), shaft rods (19) are arranged in the trapezoidal grooves (18), and sleeves (20) which are rotatably connected with the shaft rods (19) are arranged at the bottom ends of the extracting pieces (9).