CN219166766U - Interactive biliary tract metal stent - Google Patents

Abstract

The utility model provides an interactive biliary tract metal stent, which comprises a mother metal stent, a mother metal stent releasing device, a son metal stent and a son metal stent releasing device, wherein the mother metal stent is arranged in the mother metal stent releasing device, a channel for a guide wire to pass through is arranged in the mother metal stent releasing device, the mother metal stent releasing device and the mother metal stent are placed in a common bile duct under the guidance of the guide wire, and the mother metal stent is released in a left hepatic duct or a right hepatic duct through the mother metal stent releasing device; the secondary metal stent is arranged in the secondary metal stent releasing device, and the secondary metal stent releasing device is guided by the guide wire to be placed in the common bile duct through the inside of the primary metal stent releasing device, so that the secondary metal stent is released in the right hepatic duct or the left hepatic duct. The child metal stent can be released in the lumen of the parent metal stent to form a Y shape, and is used for treating the hepatic portal biliary stricture, and the tail part of the spherical child metal stent can reduce the reflux substances from entering the intrahepatic biliary tract.

Description

Interactive biliary tract metal stent

Technical Field

The utility model relates to the technical fields of minimally invasive medical technology and surgical instruments, in particular to an interactive biliary tract metal bracket.

Background

Bile duct stenosis is not uncommon and can be classified into types i to iv according to the site of stenosis and into benign bile duct stenosis and malignant bile duct stenosis according to benign malignancy. Bile excretion disorder or obstacle in Fang Danguan on the stenosis can be caused by the biliary stricture, cholestasis of intrahepatic bile duct above the stenosis, bile duct expansion, secondary obstructive jaundice and serious influence on the physical health of patients.

The duodenal mirror technology is one of the methods of benign and malignant bile duct stenosis at present, and has the advantages of small trauma, obvious curative effect, few complications and the like. Biliary tract stent implantation is the key of treating biliary tract stenosis by the duodenoscopy technology, compared with a plastic stent, the biliary tract metal stent is simple to implant, has large expansion directly and long unobstructed time, is mainly used for the multi-choice plastic treatment of type I biliary tract stenosis, type II, type III and type IV biliary tract stenosis, but the plastic stent lumen is thinner, is easily blocked by biliary mud and needs to be replaced regularly. The biliary tract metal stent can also be used for type II, III and IV biliary stricture, generally adopts a bimetallic stent implantation technology, firstly a first biliary tract metal stent is implanted into a left hepatic duct, then a second biliary tract metal stent is implanted into the right hepatic duct through a gap between the already-implanted biliary tract metal stent and the biliary tract wall.

The implantation of a double biliary tract metallic stent has the following disadvantages: 1. the operation difficulty is high, and the gap between the first biliary tract metal stent and the bile duct wall is small, so that the second biliary tract metal stent can fail to be placed; 2. the two metal brackets are placed in parallel, occupy a larger space, and can only be placed into a thinner biliary tract metal bracket for patients without obvious expansion of bile ducts, thereby shortening the clear time of stenosis; 3. the more two metal brackets are placed in parallel, the more the duodenal papilla is placed in parallel, so that intestinal chyme is easy to enter the intrahepatic bile duct through the lumen of the metal bracket and a gap between the two metal brackets, and intrahepatic cholestasis and calculus formation are caused.

Disclosure of Invention

The implantation of the double biliary tract metal stent has higher operation difficulty, and the implantation failure of the second biliary tract metal stent can be caused due to the smaller gap between the first biliary tract metal stent and the bile duct wall; the two metal brackets are placed in parallel, occupy a larger space, and can only be placed into a thinner biliary tract metal bracket for patients without obvious expansion of bile ducts, thereby shortening the clear time of stenosis; the more the two metal brackets are placed in parallel, the more the duodenal papilla is placed in parallel, so that intestinal chyme is easy to enter the intrahepatic bile duct through the lumen of the metal bracket and the gap between the two metal brackets, and the technical problems of intrahepatic cholestasis and calculus formation are caused, thereby providing the interactive biliary tract metal bracket. The utility model mainly utilizes the release of the sub-metal stent in the lumen of the parent metal stent and forms a Y shape, thereby being used for treating the stenosis of the hepatic portal bile duct, and the spherical tail of the sub-metal stent in the lumen of the parent metal stent can reduce the reflux matter from entering the intrahepatic bile duct.

The utility model adopts the following technical means:

an interactive biliary tract metallic stent comprising: the device comprises a mother metal bracket, a mother metal bracket releasing device, a son metal bracket and a son metal bracket releasing device, wherein the mother metal bracket is arranged above the inside of the mother metal bracket releasing device, a channel for a guide wire to pass through is formed in the inside of the mother metal bracket releasing device, the mother metal bracket releasing device and the mother metal bracket are placed into a common bile duct under the guidance of the guide wire, and the release of the mother metal bracket in a left hepatic duct or a right hepatic duct is realized through the mother metal bracket releasing device; the secondary metal stent is arranged above the inner part of the secondary metal stent releasing device, and under the guidance of the guide wire, the secondary metal stent releasing device brings the secondary metal stent into the common bile duct through the inner parts of the primary metal stent releasing device and the primary metal stent, so that the release of the secondary metal stent in the right hepatic duct or the left hepatic duct is realized.

Further, the mother metal bracket and the child metal bracket are released to form a Y shape, and both the mother metal bracket and the child metal bracket are woven into a grid shape by nickel-titanium alloy wires.

Further, the parent metal bracket comprises a first head part, a first body part and a first tail part which are sequentially connected with each other from beginning to end, the first released head part is in an arc-shaped protruding outer side wall structure, the first released body part is in a cylindrical structure, a side hole I is formed in one side wall of the first body part, and the initial part of the first released tail part is in an arc-shaped protruding outer side wall structure.

Further, the sub-metal bracket comprises a second head part, a second body part and a second tail part which are sequentially connected with each other from beginning to end, the second released head part is in an arc-shaped protruding outwards wall structure, the second released body part is in a cylindrical structure, the second released tail part is in a spherical structure, the second released tail part is placed in a tube cavity of the parent metal bracket through a side hole I, and the second released head part and the second released body part are located outside the parent metal bracket.

Further, the female metal bracket release device comprises an outer sleeve I and an inner core I arranged in the outer sleeve I, wherein the outer sleeve I comprises a head part III, a body part III and a tail part III which are sequentially connected with each other from beginning to end, a through hole is formed in the side wall of the head part III, a side hole II is intermittently formed from the through hole to the head end of the head part III, and a handle is wrapped outside the tail part III;

the inner core I is a double-channel pipe and comprises a head I, a head II, a metal support pipe I, a metal support pipe II, a body I, a push rod I and a tail I, wherein the head end of the head I penetrates out of the head III, the tail end of the head I is connected with the head end of the metal support pipe I, and the master metal support is sleeved on the metal support pipe I; the head end of the head II is connected with the head end of the metal support pipe II through a hole, the tail end of the head II is connected with the head end of the metal support pipe II, and the metal support is sleeved on the metal support pipe II; the metal support tube I and the metal support tube II are positioned in the head part III; the head I, the head II, the metal support tube I and the metal support tube II are all single-channel tubes, and the internal channels are a channel I, a channel II, a channel III and a channel IV respectively;

the body part I and the tail part I are two-channel pipes arranged in the body part III and the tail part III respectively; the push rod I is a double-channel pipe which is arranged at the tail end of the body part III, and the two ends of the head and the tail are respectively connected with the body part I and the tail part I; the two channels in the body part I are a channel five and a channel six, the two channels in the push rod I are a channel seven and a channel eight, and the two channels in the tail part I are a channel nine and a channel ten;

the first channel, the third channel, the fifth channel, the seventh channel and the ninth channel are sequentially communicated from beginning to end and used for a guide wire to pass through; the second channel, the fourth channel, the sixth channel, the eighth channel and the tenth channel are sequentially communicated from beginning to end and used for the passage of the other guide wire.

Further, the sub-metal bracket release device comprises an outer sleeve II and an inner core II arranged in the outer sleeve II, wherein the outer sleeve II is a single-channel pipe, the outer sleeve II comprises a head part IV, a body part IV and a tail part IV which are sequentially connected with each other from beginning to end, and a handle is wrapped outside the tail part IV;

the inner core II comprises a head III, a metal support tube III, a body II, a push rod II and a tail II which are connected with one another in sequence from beginning to end, the head end of the head III penetrates out of a head IV, a sub-metal support is sleeved on the metal support tube III, and the metal support tube III is positioned in the head IV; the body II and the tail II are respectively a single-channel tube arranged in the body IV and the tail IV; the push rod II is a single-channel pipe which is arranged at the tail end of the body part IV, and the two ends of the head and the tail are respectively connected with the body part II and the tail part II;

the channels of the head III, the metal support tube III, the body II, the push rod II and the tail II are respectively a channel I, a channel II, a channel III, a channel IV and a channel V, which are sequentially communicated from beginning to end and are used for guiding wires to pass through.

Further, the head part III of the outer sleeve I adopts a polyethylene film, the push rod I adopts a metal pipe, and the body part III and the tail part III both adopt hard plastics; the head part IV of the outer sleeve II adopts a polyethylene film, the push rod II adopts a metal pipe, and the body part IV and the tail part IV adopt hard plastics.

Further, the length of the parent metal bracket is 4cm, 6cm, 8cm or 10cm, and the diameter is 6mm, 8mm or 10mm.

Further, the length of the sub-metal stent is 3cm, 4cm or 5cm, the diameter is 6mm, 8mm or 10mm, and the diameter of the spherical structure of the tail II corresponds to the diameter of the lumen of the parent metal stent.

The utility model also provides a use method of the interactive biliary tract metal stent, which comprises the following steps:

cutting the first guide wire cannula with the incision, performing biliary tract radiography after the cannula enters the right hepatic duct or the left hepatic duct, defining the narrow part and parting, and reserving the first guide wire; cutting the knife belt with a second guide wire into a left hepatic duct or a right hepatic duct; namely, two guide wires are reserved in the left and right hepatic ducts, and 8-10Fr bougies are used for dilating the left and right hepatic duct stenosis;

the method comprises the following specific steps:

step one, two guide wires are respectively placed in a double-channel tube cavity of an inner core I corresponding to a side hole of the head end and the tube wall of a master metal bracket;

step two, when the mother metal bracket is close to the opening of the right hepatic duct, the resistance exists when the mother metal bracket is placed in the opening, the inner core I can be fixed, the outer sleeve I is pulled back, and the mother metal bracket is gradually released; after the mother metal stent is completely released, the left intrahepatic duct guide wire is left, and the mother metal stent releasing device and the right intrahepatic duct guide wire are withdrawn from the common bile duct;

step three, placing the sub-metal stent and the sub-metal stent releasing device into the common bile duct under the guidance of the left intrahepatic duct guide wire, entering the left intrahepatic duct through the lumen and the side holes of the parent metal stent, fixing the inner core II of the sub-metal stent and pulling the outer sleeve II back to gradually release the sub-metal stent, and finally exiting the left intrahepatic duct guide wire and the sub-metal stent releasing device.

Compared with the prior art, the utility model has the following advantages:

1. the utility model provides an interactive biliary tract metal stent, wherein two guide wire channels are arranged in a female biliary tract metal stent releaser, and two guide wires can be arranged in the female biliary tract metal stent releaser.

2. The utility model provides an interactive biliary tract metal stent, wherein a side hole is discontinuously arranged on the wall of the head end of a main biliary tract metal stent releaser, and when the biliary tract metal stent is released, the side hole discontinuously arranged on the wall of the head end of the releaser is scratched by a second guide wire, so that the implantation of a sub-biliary tract metal stent is realized.

3. The interactive biliary tract metal stent provided by the utility model is placed through the lumen and the side wall of the biliary tract metal stent, and the placement difficulty is low.

4. The tail of the biliary tract metal stent is spherical, so that chyme reflux into intrahepatic bile ducts can be reduced.

In summary, the technical scheme of the utility model can solve the problems that the operation difficulty of the implantation of the double biliary tract metal stent is high, and the implantation failure of the second biliary tract metal stent can be caused due to the small gap between the first biliary tract metal stent and the bile duct wall; the two metal brackets are placed in parallel, occupy a larger space, and can only be placed into a thinner biliary tract metal bracket for patients without obvious expansion of bile ducts, thereby shortening the clear time of stenosis; the more two metal brackets are placed in parallel, the more the duodenal papilla is placed in parallel, so that intestinal chyme is easy to enter the intrahepatic bile duct through the lumen of the metal bracket and a gap between the two metal brackets, and the problems of intrahepatic cholestasis and calculus formation are caused.

For the reasons, the utility model can be widely popularized in the fields of medical treatment and the like.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a fully released parent metal stent according to the present utility model.

FIG. 2 is a schematic structural diagram of a fully released sub-metal stent according to the present utility model.

FIG. 3 is a schematic illustration of the connection of a fully released parent metal stent with a child metal stent in accordance with the present utility model.

Fig. 4 is a schematic structural view of a master metal stent releasing device according to the present utility model.

FIG. 5 is a schematic structural view of a neutron metal stent delivery apparatus of the present utility model.

Fig. 6 is a schematic structural view of a parent metal stent releasing device for installing a parent metal stent according to the present utility model.

Fig. 7 is a schematic structural view of a sub-metal stent releasing device for mounting a sub-metal stent according to the present utility model.

Fig. 8 is a schematic view of a parent metal stent delivery device of the present utility model incorporating two guide wires.

Fig. 9 is a schematic view of the utility model in use with the parent metal stent beginning to release.

FIG. 10 is a schematic illustration of the complete release of the parent metal stent in use of the present utility model.

FIG. 11 is a schematic illustration of the connection of a fully released parent metal stent to two guidewires after withdrawal of the metal stent delivery device in use of the present utility model.

FIG. 12 is a schematic view of the present utility model with a sub-metal stent and a sub-metal stent releasing device initially placed in a fully released parent metal stent.

Fig. 13 is a schematic view of the present utility model, i.e., the complete placement of the sub-metal stent and the sub-metal stent releasing device in the fully released parent metal stent.

In the figure: 1. a first head part; 2. a first body part; 3. tail I; 4. a side hole I; 5. a second head part; 6. a second body part; 7. a second tail part; 8. a third head; 9. a third body part; 10. tail III; 11. a head I; 12. a head II; 13. a metal bracket supporting tube I; 14. a metal bracket supporting pipe II; 15. a body part I; 16. a push rod I; 17. tail I; 18. a head part IV; 19. a body part IV; 20. tail part IV; 21. a head III; 22. a metal bracket supporting tube III; 23. a body II; 24. a push rod II; 25. tail II.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides an interactive biliary tract metal bracket, belongs to a minimally invasive medical technology and a surgical instrument, and is a minimally invasive surgical instrument under a duodenoscope for treating hepatic portal biliary duct stenosis. The interactive biliary tract metal stent is an interactive biliary tract metal stent and a release device, the interactive biliary tract metal stent and the release device comprise a parent biliary tract metal stent and a release device and a child biliary tract metal stent and a release device, and the interactive biliary tract metal stent and the release device are a parent metal stent, a parent metal stent release device, a child metal stent and a child metal stent release device.

The female metal bracket comprises a head part, a body part and a tail part, wherein the head part is in an arc-shaped protruding towards the outer side wall, the body part is in a cylinder shape, a side hole is arranged on the side wall, and the tail part initial part is in an arc-shaped protruding towards the outer side wall.

The female metal support release device comprises an outer sleeve and an inner core, wherein the outer sleeve is divided into a head part, a body part and a tail part, the tail part wraps a handle, a through hole is formed in the side wall of the head part, a side hole is formed in the side wall of the head part to the head end in a discontinuous mode, the inner core is a double-channel pipe and comprises a head part I, a head part II, a metal support pipe I, a metal support pipe II, a body part, a push rod and a tail part, the head part I, the head part II, the metal support pipe I and the metal support pipe II are single-channel pipes, and the body part, the push rod and the tail part are double-channel pipes.

The sub-metal bracket comprises a head part, a body part and a tail part, wherein the head part protrudes to the outer side wall in an arc shape, the body part is cylindrical, and the tail part is spherical.

The sub-metal support release device comprises an outer sleeve and an inner core, wherein the outer sleeve and the inner core are all single-channel tubes, the outer sleeve is divided into a head part, a body part and a tail handle, and the inner core is divided into a head part, a metal support tube, a body part, a push rod and a tail part.

The master metal bracket and the slave metal bracket are woven into a grid shape by nickel-titanium alloy wires.

The utility model has the advantages that: the sub-metal stent can be released through the lumen of the parent metal stent and forms a Y shape, and can be used for treating the hepatic portal biliary duct stenosis, and the spherical tail of the sub-metal stent in the lumen of the parent metal stent can reduce reflux substances from entering the intrahepatic biliary duct.

The application method of the utility model comprises the following steps:

the first guide wire cannula is arranged in the incision knife band, biliary tract radiography is carried out after the cannula enters the right hepatic duct or the left hepatic duct, the narrow part and parting are defined, the first guide wire is reserved, and the second guide wire is arranged in the incision knife band to enter the left hepatic duct or the right hepatic duct. Two guide wires are left in the left and right hepatic ducts, and 8-10Fr bougies are used for dilating the left and right hepatic duct stenosis. The two guide wires are respectively placed in the side hole inner core tube cavity (namely the double channel tube cavity of the inner core I) of the head end and the tube wall of the head end of the master metal bracket. When the side hole of the mother metal bracket is close to the opening of the right hepatic duct, the resistance exists when the mother metal bracket is placed in the inner core I, the outer sleeve I is pulled back, the mother metal bracket is gradually released, after the mother metal bracket is completely released, the guide wire in the left hepatic duct is reserved, and the mother metal bracket releaser (mother metal bracket releaser) and the guide wire in the right hepatic duct are withdrawn from the bile duct. The secondary metal stent and the release device are placed into the common bile duct under the guidance of the left hepatic duct guide wire, enter the left hepatic duct through the lumen and the side hole of the mother metal stent, fix the inner core of the metal stent and pull back the outer sleeve to gradually release the secondary metal stent, and finally exit the left hepatic duct guide wire and the secondary metal stent releaser (secondary metal stent releaser).

Example 1

As shown in fig. 1-13, the present utility model provides an interactive biliary tract metal stent comprising: the device comprises a mother metal bracket, a mother metal bracket releasing device, a son metal bracket and a son metal bracket releasing device, wherein the mother metal bracket is arranged above the inside of the mother metal bracket releasing device, a channel for a guide wire to pass through is formed in the inside of the mother metal bracket releasing device, the mother metal bracket releasing device and the mother metal bracket are placed into a common bile duct under the guidance of the guide wire, and the mother metal bracket is released in a left hepatic duct or a right hepatic duct through the mother metal bracket releasing device; the sub-metal stent is arranged above the inner part of the sub-metal stent releasing device, and the sub-metal stent releasing device brings the sub-metal stent into the common bile duct through the inner parts of the mother metal stent releasing device and the mother metal stent under the guidance of the guide wire, so that the release of the sub-metal stent in the right hepatic duct or the left hepatic duct is realized.

In this embodiment, the mother metal stent and the child metal stent are both woven into a mesh shape from nickel-titanium alloy wires, and form a Y shape after being released.

In this embodiment, the female metal bracket includes a first head 1, a first body 2 and a first tail 3 that are sequentially connected from beginning to end, the first released head 1 is in an arc-shaped protruding towards the outer side wall structure, the first released body 2 is in a cylindrical structure, a side hole I4 is arranged on the side wall of the first body 2, and the initial part of the first released tail 3 is in an arc-shaped protruding towards the outer side wall structure. The head 1 and tail 3 are similar or identical shapes facing opposite directions and may be different in length.

In this embodiment, the sub-metal stent comprises a head portion two 5, a body portion two 6 and a tail portion two 7 which are sequentially connected from beginning to end, the released head portion two 5 is in an arc-shaped protruding towards the outer side wall structure, the released body portion two 6 is in a cylindrical structure, the released tail portion two 7 is in a spherical structure, the released tail portion two 7 is placed in the tube cavity of the parent metal stent through a side hole I4, and the released head portion two 5 and the body portion two 6 are located outside the parent metal stent.

In the embodiment, the female metal bracket release device comprises an outer sleeve I and an inner core I arranged in the outer sleeve I, wherein the outer sleeve I comprises a head part III 8, a body part III 9 and a tail part III 10 which are sequentially connected with each other from beginning to end, a through hole is formed in the side wall of the head part III 8, a side hole II is intermittently formed from the through hole to the head end of the head part III 8, and a handle is wrapped outside the tail part III 10; the inner core I is a double-channel pipe and comprises a head I11, a head II 12, a metal support pipe I13, a metal support pipe II 14, a body I15, a push rod I16 and a tail I17, wherein the head end of the head I11 penetrates out of the head III 8, the tail end is connected with the head end of the metal support pipe I13, and the mother metal support is sleeved on the metal support pipe I13; the head end of the head II 12 is connected with the through hole, the tail end is connected with the head end of the metal support tube II 14, and the metal support tube II 14 is sleeved with the metal support; the metal support tube I13 and the metal support tube II 14 are positioned in the head III 8; the head I11, the head II 12, the metal support tube I13 and the metal support tube II 14 are all single-channel tubes, and the internal channels are a channel I, a channel II, a channel III and a channel IV respectively; the body I15 and the tail I17 are respectively two-channel pipes arranged in the body III 9 and the tail III 10; the push rod I16 is a double-channel pipe which is arranged at the tail end of the body part III 9, and the head end and the tail end are respectively connected with the body part I15 and the tail part I17; the two channels in the body part I15 are a channel five and a channel six, the two channels in the push rod I16 are a channel seven and a channel eight, and the two channels in the tail part I17 are a channel nine and a channel ten; the first channel, the third channel, the fifth channel, the seventh channel and the ninth channel are sequentially communicated from beginning to end and used for a guide wire to pass through; the second channel, the fourth channel, the sixth channel, the eighth channel and the tenth channel are communicated sequentially from beginning to end and used for the passage of the other guide wire.

In the embodiment, the sub-metal bracket release device comprises an outer sleeve II and an inner core II arranged in the outer sleeve II, wherein the inner core II is a single-channel tube, the outer sleeve II comprises a head part IV 18, a body part IV 19 and a tail part IV 20 which are connected with each other in sequence from beginning to end, and a handle is wrapped outside the tail part IV 20; the inner core II comprises a head III 21, a metal support tube III 22, a body II 23, a push rod II 24 and a tail II 25 which are connected with each other in sequence from beginning to end, the head end of the head III 21 penetrates through the head IV 18, the metal support tube III 22 is sleeved with the metal support tube, and the metal support tube III 22 is positioned in the head IV 18; the body II 23 and the tail II 25 are respectively single-channel tubes arranged in the body IV 19 and the tail IV 20; the push rod II 24 is a single-channel pipe which is arranged at the tail end of the body part IV 19, and the head end and the tail end are respectively connected with the body part II 23 and the tail part II 25; the channels of the head III 21, the metal support tube III 22, the body II 23, the push rod II 24 and the tail II 25 are respectively a channel I, a channel II, a channel III, a channel IV and a channel V, which are communicated sequentially from beginning to end and are used for guiding wires to pass through. Wherein, utilize the intermittent side opening that is equipped with on the master metal support releaser head end pipe wall, when releasing biliary tract metal support, the intermittent side opening that is equipped with on the releaser head end pipe wall is divided by the second piece of seal wire, and then realizes the implantation of sub-metal support.

In the embodiment, a head part III 8 of the outer sleeve I adopts a polyethylene film, a push rod I16 adopts a metal pipe, and a body part III 9 and a tail part III 10 both adopt hard plastics; the head part IV 18 of the outer sleeve II adopts a polyethylene film, the push rod II 24 adopts a metal pipe, and the body part IV 19 and the tail part IV 20 adopt hard plastics.

In this example, the length of the parent metal stent is 4cm, 6cm, 8cm or 10cm, and the diameter is 6mm, 8mm or 10mm.

In this embodiment, the length of the sub-metal stent is 3cm, 4cm or 5cm, the diameter is 6mm, 8mm or 10mm, and the diameter of the spherical structure of the tail two 7 corresponds to the diameter of the lumen of the parent metal stent.

The utility model also provides a use method of the interactive biliary tract metal stent, which comprises the following steps:

cutting the first guide wire cannula with the incision, performing biliary tract radiography after the cannula enters the right hepatic duct or the left hepatic duct, defining the narrow part and parting, and reserving the first guide wire; cutting the knife belt with a second guide wire into a left hepatic duct or a right hepatic duct; namely, two guide wires are reserved in the left and right hepatic ducts, and 8-10Fr bougies are used for dilating the left and right hepatic duct stenosis;

the method comprises the following specific steps:

step one, two guide wires are respectively placed in a double-channel tube cavity of an inner core I corresponding to a side hole of the head end and the tube wall of a master metal bracket;

step two, when the mother metal bracket is close to the opening of the right hepatic duct, the resistance exists when the mother metal bracket is placed in the opening, the inner core I can be fixed, the outer sleeve I is pulled back, and the mother metal bracket is gradually released; after the mother metal stent is completely released, the left intrahepatic duct guide wire is left, and the mother metal stent releasing device and the right intrahepatic duct guide wire are withdrawn from the common bile duct;

step three, placing the sub-metal stent and the sub-metal stent releasing device into the common bile duct under the guidance of the left intrahepatic duct guide wire, entering the left intrahepatic duct through the lumen and the side holes of the parent metal stent, fixing the inner core II of the sub-metal stent and pulling the outer sleeve II back to gradually release the sub-metal stent, and finally exiting the left intrahepatic duct guide wire and the sub-metal stent releasing device.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. An interactive biliary tract metallic stent, comprising: the device comprises a mother metal bracket, a mother metal bracket releasing device, a son metal bracket and a son metal bracket releasing device, wherein the mother metal bracket is arranged above the inside of the mother metal bracket releasing device, a channel for a guide wire to pass through is formed in the inside of the mother metal bracket releasing device, the mother metal bracket releasing device and the mother metal bracket are placed into a common bile duct under the guidance of the guide wire, and the release of the mother metal bracket in a left hepatic duct or a right hepatic duct is realized through the mother metal bracket releasing device; the secondary metal stent is arranged above the inner part of the secondary metal stent releasing device, and under the guidance of the guide wire, the secondary metal stent releasing device brings the secondary metal stent into the common bile duct through the inner parts of the primary metal stent releasing device and the primary metal stent, so that the release of the secondary metal stent in the right hepatic duct or the left hepatic duct is realized.

2. The interactive biliary tract metal stent of claim 1 wherein the parent metal stent and the child metal stent form a Y-shape after release, the parent metal stent and the child metal stent each being woven in a mesh shape from nitinol wires.

3. The interactive biliary tract metal stent according to claim 1 or 2, characterized in that the parent metal stent comprises a head part one (1), a body part one (2) and a tail part one (3) which are connected with each other in sequence from beginning to end, wherein the released head part one (1) is in an arc-shaped protruding towards the outer side wall structure, the released body part one (2) is in a cylindrical structure, a side hole I (4) is arranged on the side wall of the body part one (2), and the initial part of the released tail part one (3) is in an arc-shaped protruding towards the outer side wall structure.

4. An interactive biliary tract metal stent according to claim 3, characterized in that the sub-metal stent comprises a head part II (5), a body part II (6) and a tail part II (7) which are connected with each other in sequence from beginning to end, wherein the released head part II (5) is in an arc-shaped protruding to the outer side wall structure, the released body part II (6) is in a cylindrical structure, the released tail part II (7) is in a spherical structure, the released tail part II (7) is placed in a tube cavity of the parent metal stent through a side hole I (4), and the released head part II (5) and the body part II (6) are positioned outside the parent metal stent.

5. The interactive biliary tract metal stent according to claim 1, wherein the female metal stent releasing device comprises an outer sleeve I and an inner core I arranged inside the outer sleeve I, the outer sleeve I comprises a head part III (8), a body part III (9) and a tail part III (10) which are connected with each other in sequence from beginning to end, a through hole is arranged on the side wall of the head part III (8), a side hole II is discontinuously arranged from the through hole to the head end of the head part III (8), and a handle is wrapped outside the tail part III (10);

the inner core I is a double-channel pipe and comprises a head I (11), a head II (12), a metal support pipe I (13), a metal support pipe II (14), a body I (15), a push rod I (16) and a tail I (17), wherein the head end of the head I (11) penetrates out of a head III (8), the tail end is connected with the head end of the metal support pipe I (13), and the master metal support is sleeved on the metal support pipe I (13); the head end of the head II (12) is connected with the through hole, the tail end is connected with the head end of the metal support tube II (14), and the sub-metal support tube is sleeved on the metal support tube II (14); the metal support tube I (13) and the metal support tube II (14) are positioned in the head III (8); the head I (11), the head II (12), the metal support tube I (13) and the metal support tube II (14) are all single-channel tubes, and the internal channels are a channel I, a channel II, a channel III and a channel IV respectively;

the body part I (15) and the tail part I (17) are two-channel pipes arranged in the body part III (9) and the tail part III (10) respectively; the push rod I (16) is a double-channel pipe which is arranged at the tail end of the body part III (9) and the two ends of the head and the tail are respectively connected with the body part I (15) and the tail part I (17); the two channels in the body part I (15) are a channel five and a channel six, the two channels in the push rod I (16) are a channel seven and a channel eight, and the two channels in the tail part I (17) are a channel nine and a channel ten;

the first channel, the third channel, the fifth channel, the seventh channel and the ninth channel are sequentially communicated from beginning to end and used for a guide wire to pass through; the second channel, the fourth channel, the sixth channel, the eighth channel and the tenth channel are sequentially communicated from beginning to end and used for the passage of the other guide wire.

6. The interactive biliary tract metal stent according to claim 5, wherein the sub-metal stent releasing device comprises an outer sleeve II and an inner core II arranged inside the outer sleeve II, which are all single-channel tubes, the outer sleeve II comprises a head part IV (18), a body part IV (19) and a tail part IV (20) which are connected with each other in sequence from beginning to end, and a handle is wrapped outside the tail part IV (20);

the inner core II comprises a head III (21), a metal support tube III (22), a body II (23), a push rod II (24) and a tail II (25) which are sequentially connected with each other from beginning to end, the head end of the head III (21) penetrates out of a head IV (18), a sub-metal support is sleeved on the metal support tube III (22), and the metal support tube III (22) is positioned in the head IV (18); the body II (23) and the tail II (25) are respectively single-channel tubes arranged in the body IV (19) and the tail IV (20); the push rod II (24) is a single-channel pipe which is arranged at the tail end of the body part IV (19) and the two ends of the head and the tail are respectively connected with the body part II (23) and the tail part II (25);

the channels of the head part III (21), the metal support supporting tube III (22), the body part II (23), the push rod II (24) and the tail part II (25) are respectively a channel I, a channel II, a channel III, a channel IV and a channel V, which are communicated sequentially from beginning to end and are used for guiding wires to pass through.

7. The interactive biliary tract metal stent according to claim 6, wherein the head part III (8) of the outer sleeve I adopts a polyethylene film, the push rod I (16) adopts a metal tube, and the body part III (9) and the tail part III (10) both adopt hard plastics; the head part IV (18) of the outer sleeve II adopts a polyethylene film, the push rod II (24) adopts a metal pipe, and the body part IV (19) and the tail part IV (20) adopt hard plastics.

8. The interactive biliary tract metal stent according to claim 1, wherein the parent metal stent has a length of 4cm, 6cm, 8cm or 10cm and a diameter of 6mm, 8mm or 10mm.

9. The interactive biliary tract metal stent according to claim 1, wherein the length of the sub-metal stent is 3cm, 4cm or 5cm, the diameter is 6mm, 8mm or 10mm, and the diameter of the spherical structure of the caudal two (7) corresponds to the diameter of the lumen of the parent metal stent.

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