CN215651399U

CN215651399U - Biliary tract bile duct calculus grabbing mechanism

Info

Publication number: CN215651399U
Application number: CN202121577097.4U
Authority: CN
Inventors: 姜先芹
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-01-28
Anticipated expiration: 2031-07-12

Abstract

The utility model relates to a biliary calculus grabbing mechanism, which comprises a guide tube, a base tube, a supporting wall linkage air bag and a plurality of grabbing claws, wherein the base tube is connected to the end part of the guide tube; the supporting wall linkage air bag comprises a grabbing claw fixing surface and a folding embedding surface, and is unfolded into a frustum shape in an inflated state; the grabbing claw comprises a guide connecting rod and a claw hook. The biliary tract bile duct calculus grabbing mechanism is simple in structure and high in operation flexibility, linkage wrapping type grabbing is performed while the inner wall of a biliary tract bile duct at a calculus is propped open, feeding of the grabbing mechanism and taking out of a biliary tract calculus are rapid and firm, and retention of broken stone and powder residues is reduced from two sides of the calculus in the opposite directions of a duct inlet direction and the duct inlet direction on the basis of not damaging the inner wall of the bile duct.

Description

Biliary tract bile duct calculus grabbing mechanism

Technical Field

The utility model relates to a biliary tract calculus taking-out instrument for hepatobiliary surgery, in particular to a biliary tract bile duct calculus grabbing mechanism.

Background

Gallstones refer to the disease of the biliary system including stones in the gallbladder or bile duct. The cholecystolithiasis is positioned in a cavity, except a conservative treatment method for fossils by taking medicines, the most direct treatment mode is surgical extraction, the cholecystolithiasis is positioned in a common bile duct or a branch bile duct, the medicines are difficult to stay at a designated position for a long time to act as fossils, in addition, the position of occurrence of the cholecystolithiasis is variable, the surgical treatment has the disadvantages of wide incision area, long operation time, great pain for patients and the like, therefore, the common means is to insert a guide line into the duct to extract the cholecystolithiasis, namely, the guide line is inserted into the position of the cholecystolithiasis in the duct, and the cholecystolithiasis is extracted by using an extracting forceps, because the method is blind extraction, most laparoscopes are arranged in the duct to be matched and observed, the extracting forceps are special forceps, but the basic structure of the extracting forceps is still provided with a hinged part among forceps handles, forceps heads and forceps heads of the forceps handles, the complicated structure is arranged in a guide tube, and the inherent defects of inflexible operation are caused, even if the forceps handle is made into a special bending structure, the forceps head needs to be driven to open and close, and the forceps handle still needs to be made of a hard material and is difficult to adapt to the complicated shape of the bile duct in the body. A batch of novel stone forceps with stay cord drive binding clip has appeared among the prior art, or the mode of getting is got to the mode replacement tradition of absorbing the calculus with the negative pressure, however the former lays stay cord spring structure still very complicated in the guide tube, the latter relies on the negative pressure to absorb the calculus, there is not the gap all to assume calculus and mouth of pipe, think the calculus promptly to be the sphere of shape rule, because in case there is the gap, the adsorption effect of negative pressure reduces immediately, the adsorption affinity can't guarantee at all to pull out the calculus in the biliary tract bile duct extracorporeally, in addition, the two is intraductal stone of getting, the calculus takes out the in-process and takes place the friction with the biliary tract wall, very easily break away from the stone clamp or the absorption mouth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a grabbing mechanism which can open the wall of a duct near a calculus and grab the calculus in a biliary tract by an external wrapping mode.

In order to solve the technical problem, the biliary duct calculus grabbing mechanism comprises a guide tube, a base tube, a supporting wall linkage air bag and a plurality of grabbing claws, wherein the base tube is connected to the end part of the guide tube, the supporting wall linkage air bag is fixed at the end part of the base tube in a surrounding manner, and each grabbing claw is uniformly distributed on the outer wall of the supporting wall linkage air bag; the supporting wall linkage air bag comprises a grabbing claw fixing surface and a folding embedding surface which are mutually connected, the grabbing claw fixing surface and the folding embedding surface are unfolded into a frustum shape in an inflated state, the edge of the grabbing claw fixing surface is fixed on the outer edge of the pipe opening of the base pipe, and the edge of the folding embedding surface is fixed in the pipe groove; the grabbing claw comprises a guide connecting rod with one end extending out of the pipe orifice of the base pipe and a claw hook pointing to the axis of the base pipe. According to the design, the gas in the wall-supporting linkage air bag is evacuated and is filled into the tube groove of the base tube after being folded, so that the external form of the base tube is integrally cylindrical and is convenient to push; then the base pipe is connected to the existing common polyethylene intestinal canal guiding pipe/drainage pipe, and the grabbing mechanism is pushed to the position of the stone of the biliary duct; gas is sent from the guide tube, the wall-supporting linkage air bag is inflated, the wall-supporting linkage air bag is inwards inclined under the action of the deformation of the wall-supporting linkage air bag when the wall of the gallbladder around the position of the calculus is supported, the claw hook is driven to grab the calculus which is separated from the wall of the gallbladder from the outside, and the calculus can be taken out of the body after the guide tube is withdrawn.

As optimization, the outer surface of the guide connecting rod is a cambered surface; the outer surface of the claw hook is an arc surface, and the claw hook is arc-shaped and is bent inwards. So design, the in-process of pushing, the whole contact surface that snatchs mechanism and biliary tract bile duct inner wall is smooth cambered surface, has avoided will snatching the mechanism propelling movement to calculus position in-process to the guiding tube, to the injury of biliary tract bile duct.

Preferably, the air blocking sheet is arranged in the cavity of the base pipe close to the claw hook and arranged between the pipe groove and the claw hook. So design, send into gaseous, through the through-hole pour into prop the wall linkage gasbag, will prop the in-process that the wall linkage gasbag propped open into at the guide tube, play the effect that blocks gaseous from leaking from the parent tube mouth.

Preferably, a separation net is further arranged in the cavity of the base pipe and is arranged between the air blocking piece and the claw hook. So design, this separation net is used for catching cracked calculus powder piece through the mesh, and in the calculus in-process is grabbed to the package, often can meet the condition that the calculus presss from both sides garrulous, through setting up separation net, will dash into the inside explanation powder piece of parent tube and sieve into or the clamping, prevents that it from scattering into inside biliary tract bile duct backward again.

Preferably, the number of the grabbing claws is four, and the grabbing claws are uniformly distributed on the supporting wall linkage air bag at intervals of 90 degrees.

As optimization, six grabbing claws are arranged, and all the grabbing claws are uniformly distributed on the supporting wall linkage air bag at intervals of 60 degrees.

Preferably, the number of the grabbing claws is eight, and the grabbing claws are uniformly distributed on the supporting wall linkage air bag at intervals of 45 degrees. By the design, the number of the grabbing claws is increased, so that gaps among the grabbing claws are reduced, and stone fragments are prevented from scattering in a biliary duct in the direction opposite to the duct entering direction.

The biliary duct calculus grabbing mechanism is simple in structure and convenient and fast to operate, the calculus grabbing structure design of the wall-supporting linkage air bag carrying grabbing claws is matched with the improvement of an internal structure, so that the biliary duct calculus grabbing mechanism is simple in structure and high in operation flexibility, linkage outer wrapping type grabbing is performed while the inner wall of a biliary duct at a calculus position is propped, feeding of the grabbing mechanism and taking out of biliary ducts are fast and firm, and retention of crushed stone powder and slag is reduced from two sides of the calculus in the direction opposite to the duct feeding direction on the basis of not damaging the inner wall of the biliary duct.

Drawings

The biliary tract calculus grabbing mechanism of the utility model is further explained with reference to the attached drawings as follows:

fig. 1 is a schematic view of a main view plane structure (a state in which a supporting wall linkage balloon is stored) of embodiment 1 of the present biliary tract calculus gripping mechanism;

fig. 2 is a schematic side view plan view (guide tube not shown) of embodiment 1 of the present biliary tract calculus gripping mechanism;

FIG. 3 is a schematic longitudinal sectional view A-A of FIG. 2 (guide tube not shown);

fig. 4 is a schematic main view plane structure diagram of embodiment 1 of the present biliary tract calculus gripping mechanism (in a state where the supporting wall linkage balloon is inflated and deployed, the guide tube is not shown);

fig. 5 is a schematic side view plan view (guide tube not shown) of embodiment 2 of the present biliary tract calculus gripping mechanism;

fig. 6 is a side view plan view schematic view (guide tube not shown) of embodiment 3 of the present biliary tract calculus gripping mechanism.

In the figure: 1-guide tube, 2-base tube, 201-tube groove, 202-through hole, 203-air baffle sheet, 204-separation net, 3-wall supporting linkage air bag, 301-grasping claw fixing surface, 302-folding embedding surface, 4-several grasping claws, 401-guide connecting rod, 402-claw hook.

Detailed Description

Embodiment 1: as shown in fig. 1 to 4, the biliary calculus grabbing mechanism comprises a guide tube 1, a base tube 2, a supporting wall linkage air bag 3 and a plurality of grabbing claws 4, wherein the base tube 2 is connected to the end portion 1 of the guide tube, the supporting wall linkage air bag 3 is fixed to the end portion of the base tube 2 in a surrounding manner, and each grabbing claw 4 is uniformly distributed on the outer wall of the supporting wall linkage air bag 3, wherein a circumferential inwards concave tube groove 201 is formed in the outer wall of the base tube 2, a plurality of through holes 202 penetrating through the tube cavity of the base tube 2 are formed in the bottom wall of the tube groove 201, and a gas blocking sheet 203 is arranged in the tube cavity of the base tube 2; the supporting wall linkage air bag 3 comprises a grabbing claw fixing surface 301 and a folding embedding surface 302 which are connected with each other, under the inflation state, the grabbing claw fixing surface 301 and the folding embedding surface 302 are unfolded into a frustum shape, the edge of the grabbing claw fixing surface 301 is fixed on the outer edge of the pipe orifice of the base pipe 2, and the edge of the folding embedding surface 302 is fixed in the pipe groove 201; the gripping claw 4 comprises a guide connecting rod 401 with one end extending out of the nozzle of the base pipe 2 and a claw hook 402 pointing to the axis of the base pipe 2. The gas in the wall-supporting linkage air bag is evacuated and is filled into the tube slot of the base tube after being folded, so that the external form of the base tube is integrally cylindrical and is convenient to push; then the base pipe is connected to the existing common polyethylene intestinal canal guiding pipe/drainage pipe, and the grabbing mechanism is pushed to the position of the stone of the biliary duct; gas is sent from the guide tube, the wall-supporting linkage air bag is inflated, the wall-supporting linkage air bag is inwards inclined under the action of the deformation of the wall-supporting linkage air bag when the wall of the gallbladder around the position of the calculus is supported, the claw hook is driven to grab the calculus which is separated from the wall of the gallbladder from the outside, and the calculus can be taken out of the body after the guide tube is withdrawn.

The outer surface of the guide connecting rod 401 is an arc surface; the outer surface of the claw hook 402 is an arc surface, and the claw hook 402 is arc-shaped and is bent inwards. So design, the in-process of pushing, the whole contact surface that snatchs mechanism and biliary tract bile duct inner wall is smooth cambered surface, has avoided will snatching the mechanism propelling movement to calculus position in-process to the guiding tube, to the injury of biliary tract bile duct. The air baffle 203 is arranged in the lumen of the base pipe 2 near the claw 402 and between the pipe groove 201 and the claw 402. So design, send into gaseous, through the through-hole pour into prop the wall linkage gasbag, will prop the in-process that the wall linkage gasbag propped open into at the guide tube, play the effect that blocks gaseous from leaking from the parent tube mouth. And a separation net 204 is also arranged in the cavity of the base pipe 2, and the separation net 204 is arranged between the air blocking sheet 203 and the claw hook 402. So design, this separation net is used for catching cracked calculus powder piece through the mesh, and in the calculus in-process is grabbed to the package, often can meet the condition that the calculus presss from both sides garrulous, through setting up separation net, will dash into the inside explanation powder piece of parent tube and sieve into or the clamping, prevents that it from scattering into inside biliary tract bile duct backward again. The number of the grabbing claws 4 is four, and the grabbing claws 4 are uniformly distributed on the wall supporting linkage air bag 3 at intervals of 90 degrees.

Embodiment 2: as shown in fig. 5: the biliary tract bile duct stone grabbing mechanism comprises a guide tube 1, a base tube 2, a supporting wall linkage air bag 3 and a plurality of grabbing claws 4, wherein the base tube 2 is connected to the end part 1 of the guide tube, the supporting wall linkage air bag 3 is fixed at the end part of the base tube 2 in a surrounding manner, and each grabbing claw 4 is uniformly distributed on the outer wall of the supporting wall linkage air bag 3, wherein a circumferential inwards-recessed tube groove 201 is formed in the outer wall of the base tube 2, a plurality of through holes 202 penetrating through the tube cavity of the base tube 2 are formed in the bottom wall of the tube groove 201, and a gas blocking sheet 203 is arranged in the tube cavity of the base tube 2; the supporting wall linkage air bag 3 comprises a grabbing claw fixing surface 301 and a folding embedding surface 302 which are connected with each other, under the inflation state, the grabbing claw fixing surface 301 and the folding embedding surface 302 are unfolded into a frustum shape, the edge of the grabbing claw fixing surface 301 is fixed on the outer edge of the pipe orifice of the base pipe 2, and the edge of the folding embedding surface 302 is fixed in the pipe groove 201; the gripping claw 4 comprises a guide connecting rod 401 with one end extending out of the nozzle of the base pipe 2 and a claw hook 402 pointing to the axis of the base pipe 2. The gas in the wall-supporting linkage air bag is evacuated and is filled into the tube slot of the base tube after being folded, so that the external form of the base tube is integrally cylindrical and is convenient to push; then the base pipe is connected to the existing common polyethylene intestinal canal guiding pipe/drainage pipe, and the grabbing mechanism is pushed to the position of the stone of the biliary duct; gas is sent from the guide tube, the wall-supporting linkage air bag is inflated, the wall-supporting linkage air bag is inwards inclined under the action of the deformation of the wall-supporting linkage air bag when the wall of the gallbladder around the position of the calculus is supported, the claw hook is driven to grab the calculus which is separated from the wall of the gallbladder from the outside, and the calculus can be taken out of the body after the guide tube is withdrawn.

The outer surface of the guide connecting rod 401 is an arc surface; the outer surface of the claw hook 402 is an arc surface, and the claw hook 402 is arc-shaped and is bent inwards. So design, the in-process of pushing, the whole contact surface that snatchs mechanism and biliary tract bile duct inner wall is smooth cambered surface, has avoided will snatching the mechanism propelling movement to calculus position in-process to the guiding tube, to the injury of biliary tract bile duct. The air baffle 203 is arranged in the lumen of the base pipe 2 near the claw 402 and between the pipe groove 201 and the claw 402. So design, send into gaseous, through the through-hole pour into prop the wall linkage gasbag, will prop the in-process that the wall linkage gasbag propped open into at the guide tube, play the effect that blocks gaseous from leaking from the parent tube mouth. And a separation net 204 is also arranged in the cavity of the base pipe 2, and the separation net 204 is arranged between the air blocking sheet 203 and the claw hook 402. So design, this separation net is used for catching cracked calculus powder piece through the mesh, and in the calculus in-process is grabbed to the package, often can meet the condition that the calculus presss from both sides garrulous, through setting up separation net, will dash into the inside explanation powder piece of parent tube and sieve into or the clamping, prevents that it from scattering into inside biliary tract bile duct backward again. Six grabbing claws 4 are arranged, and the grabbing claws 4 are uniformly distributed on the supporting wall linkage air bag 3 at intervals of 60 degrees.

Embodiment 3: as shown in fig. 6, the biliary calculus grabbing mechanism comprises a guide tube 1, a base tube 2, a supporting wall linkage air bag 3 and a plurality of grabbing claws 4, wherein the base tube 2 is connected to the end portion 1 of the guide tube, the supporting wall linkage air bag 3 is fixed to the end portion of the base tube 2 in a surrounding manner, and each grabbing claw 4 is uniformly distributed on the outer wall of the supporting wall linkage air bag 3, wherein a circumferential inwards-recessed tube groove 201 is formed in the outer wall of the base tube 2, a plurality of through holes 202 penetrating through the tube cavity of the base tube 2 are formed in the bottom wall of the tube groove 201, and a gas blocking sheet 203 is arranged in the tube cavity of the base tube 2; the supporting wall linkage air bag 3 comprises a grabbing claw fixing surface 301 and a folding embedding surface 302 which are connected with each other, under the inflation state, the grabbing claw fixing surface 301 and the folding embedding surface 302 are unfolded into a frustum shape, the edge of the grabbing claw fixing surface 301 is fixed on the outer edge of the pipe orifice of the base pipe 2, and the edge of the folding embedding surface 302 is fixed in the pipe groove 201; the gripping claw 4 comprises a guide connecting rod 401 with one end extending out of the nozzle of the base pipe 2 and a claw hook 402 pointing to the axis of the base pipe 2. The gas in the wall-supporting linkage air bag is evacuated and is filled into the tube slot of the base tube after being folded, so that the external form of the base tube is integrally cylindrical and is convenient to push; then the base pipe is connected to the existing common polyethylene intestinal canal guiding pipe/drainage pipe, and the grabbing mechanism is pushed to the position of the stone of the biliary duct; gas is sent from the guide tube, the wall-supporting linkage air bag is inflated, the wall-supporting linkage air bag is inwards inclined under the action of the deformation of the wall-supporting linkage air bag when the wall of the gallbladder around the position of the calculus is supported, the claw hook is driven to grab the calculus which is separated from the wall of the gallbladder from the outside, and the calculus can be taken out of the body after the guide tube is withdrawn.

The outer surface of the guide connecting rod 401 is an arc surface; the outer surface of the claw hook 402 is an arc surface, and the claw hook 402 is arc-shaped and is bent inwards. So design, the in-process of pushing, the whole contact surface that snatchs mechanism and biliary tract bile duct inner wall is smooth cambered surface, has avoided will snatching the mechanism propelling movement to calculus position in-process to the guiding tube, to the injury of biliary tract bile duct. The air baffle 203 is arranged in the lumen of the base pipe 2 near the claw 402 and between the pipe groove 201 and the claw 402. So design, send into gaseous, through the through-hole pour into prop the wall linkage gasbag, will prop the in-process that the wall linkage gasbag propped open into at the guide tube, play the effect that blocks gaseous from leaking from the parent tube mouth. And a separation net 204 is also arranged in the cavity of the base pipe 2, and the separation net 204 is arranged between the air blocking sheet 203 and the claw hook 402. So design, this separation net is used for catching cracked calculus powder piece through the mesh, and in the calculus in-process is grabbed to the package, often can meet the condition that the calculus presss from both sides garrulous, through setting up separation net, will dash into the inside explanation powder piece of parent tube and sieve into or the clamping, prevents that it from scattering into inside biliary tract bile duct backward again. The number of the grabbing claws 4 is eight, and the grabbing claws 4 are uniformly distributed on the supporting wall linkage air bag 3 at intervals of 45 degrees. The number of the grabbing claws is increased, so that gaps among the grabbing claws are reduced, and stone fragments are prevented from scattering in a biliary duct in the direction opposite to the duct entering direction.

The foregoing embodiments are intended to illustrate that the utility model may be implemented or used by those skilled in the art, and modifications to the above embodiments will be apparent to those skilled in the art, and therefore the utility model includes, but is not limited to, the above embodiments, any methods, processes, products, etc., consistent with the principles and novel and inventive features disclosed herein, and fall within the scope of the utility model.

Claims

1. A biliary tract bile duct calculus grabbing mechanism is characterized in that: comprises a guide tube (1), a base tube (2), a wall supporting linkage air bag (3) and a plurality of grabbing claws (4), wherein the base tube (2) is connected with the end part of the guide tube (1), the wall supporting linkage air bag (3) is fixed at the end part of the base tube (2) in a surrounding way, each grabbing claw (4) is uniformly distributed on the outer wall of the wall supporting linkage air bag (3),

a pipe groove (201) which is sunken inwards is arranged on the outer wall of the base pipe (2), a plurality of through holes (202) which penetrate through the pipe cavity of the base pipe (2) are formed in the bottom wall of the pipe groove (201), and an air baffle sheet (203) is arranged in the pipe cavity of the base pipe (2);

the wall-supporting linkage air bag (3) comprises a grabbing claw fixing surface (301) and a folding embedding surface (302) which are connected with each other, the grabbing claw fixing surface (301) and the folding embedding surface (302) are unfolded into a frustum shape in an inflated state, the edge of the grabbing claw fixing surface (301) is fixed on the outer edge of the pipe orifice of the base pipe (2), and the edge of the folding embedding surface (302) is fixed in the pipe groove (201);

the grabbing claw (4) comprises a guide connecting rod (401) with one end extending out of the pipe orifice of the base pipe (2) and a claw hook (402) pointing to the axis of the base pipe (2).

2. The biliary tract stone grasping mechanism according to claim 1, wherein: the outer surface of the guide connecting rod (401) is an arc surface; the outer surface of the claw hook (402) is an arc surface, and the claw hook (402) is arc-shaped and bends inwards.

3. The biliary tract stone grasping mechanism according to claim 2, wherein: the air blocking sheet (203) is arranged in the tube cavity of the base tube (2) close to the claw hook (402) and is arranged between the tube groove (201) and the claw hook (402).

4. The biliary tract stone grasping mechanism according to claim 3, wherein: and an isolation net (204) is also arranged in the cavity of the base pipe (2), and the isolation net (204) is arranged between the air blocking sheet (203) and the claw hook (402).

5. The biliary tract stone grasping mechanism according to claim 4, wherein: the number of the grabbing claws (4) is four, and the grabbing claws (4) are uniformly distributed on the supporting wall linkage air bag (3) at 90 degrees.

6. The biliary tract stone grasping mechanism according to claim 4, wherein: six grabbing claws (4) are arranged, and the grabbing claws (4) are uniformly distributed on the supporting wall linkage air bag (3) at intervals of 60 degrees.

7. The biliary tract stone grasping mechanism according to claim 4, wherein: the number of the grabbing claws (4) is eight, and the grabbing claws (4) are uniformly distributed on the supporting wall linkage air bag (3) at intervals of 45 degrees.