CN219166782U - Metal stent implantation device and metal stent for biliary tract endoscopic forceps - Google Patents

Abstract

The utility model provides a metal bracket implantation device and a metal bracket of a choledochoscope forceps channel, and relates to the technical field of medical appliances. The metal stent implantation device of the choledochoscope forceps channel comprises: comprises a choledochoscope and a metal bracket implanter, wherein the choledochoscope comprises a main body, a lens tube and an objective lens; the lens tube is provided with an objective lens channel and an instrument channel, the main body is arranged at the proximal end of the lens tube and is communicated with the objective lens channel and the instrument channel, and the main body is provided with a proximal end channel inlet; the objective lens is arranged at the far end of the objective lens channel, the bracket implanter enters the instrument channel through the inlet of the near-end channel, and is released to the far end of the choledochoscope through the far end of the instrument channel, and the far end of the metal bracket implanter extends out of the far end of the choledochoscope and releases the metal bracket under the direct-view monitoring of the choledochoscope. The device solves the problem that the metal bracket can not be released under the direct view observation of the endoscope in the traditional ERCP operation process, so that an operator and a patient are exposed to X rays, and the X rays have great harm to human bodies.

Description

Metal stent implantation device and metal stent for biliary tract endoscopic forceps

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a metal stent implantation device and a metal stent of a choledochoscope forceps channel.

Background

Bile duct stenosis is a biliary tract lumen scar constriction due to bile duct injury and recurrent cholangitis or congenital. Early antibiotic treatment was feasible, but surgical treatment was the underlying treatment for this disease. Among the commonly used treatments for biliary tract injury and recurrent cholangitis are endoscopic, interventional, surgical and pharmaceutical treatments. At present, the endoscopic drainage and treatment for biliary tract stenosis or obstruction are carried out by implanting a plastic bracket and a metal bracket into a stenosis part under ERCP, the plastic bracket and the metal bracket are required to be implanted into an affected part by means of X rays in the operation process, an operator and a patient are required to be exposed to the X rays, and the damage of the X rays to medical staff is great in the long time.

Disclosure of Invention

The utility model aims to provide a metal stent implantation device and a metal stent for a choledochoscope forceps channel, which are used for solving the problem that in the prior art, the metal stent cannot be released under the direct view observation of an endoscope in the traditional ERCP operation process, so that an operator and a patient are exposed to X rays, and the X rays have great harm to medical staff.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a metal stent implantation device of a choledochoscope forceps channel, which comprises the following components: comprises a choledochoscope and a metal bracket implanter, wherein the choledochoscope comprises a main body, a lens tube and an objective lens;

the lens tube is provided with an objective lens channel and an instrument channel, the main body is arranged at the proximal end of the lens tube and is communicated with the objective lens channel and the instrument channel, and the main body is provided with a proximal end channel inlet communicated with the instrument channel;

the objective lens is mounted at the distal end of the objective lens channel, and the metal stent implanter enters the instrument channel through the proximal channel entrance and is released to the distal end of the choledochoscope through the distal end of the instrument channel.

As a further technical scheme, the main body is also provided with an adjusting knob which is in transmission connection with the lens tube and is rotated to adjust the direction of the distal end of the lens tube.

As a further aspect, a metal stent-graft comprises an outer tube assembly, a middle tube assembly and an inner core assembly;

the middle pipe assembly is sleeved on the inner core assembly, and the outer pipe assembly is sleeved on the middle pipe assembly.

As a further technical scheme, the outer tube assembly comprises an outer tube sleeved on the middle tube assembly and an outer tube handle, and the outer tube handle is fixedly arranged at the proximal end of the outer tube.

As a further technical scheme, be provided with multistage instruction scale on the outer wall of outer tube, the interval setting is followed to the axis direction of outer tube to the instruction scale that the multistage is shown.

As a further technical scheme, the middle tube assembly comprises a middle tube sleeved on the inner core assembly and a middle tube handle, and the middle tube handle is arranged at the proximal end of the middle tube;

the outer tube and the outer tube handle are both sleeved on the middle tube.

As a further technical scheme, the inner core assembly comprises an inner core, a blocking head and a luer connector, wherein the luer connector is connected to the proximal end of the inner core and is opposite to the middle tube handle;

the plugging head is connected to the distal end of the inner core and extends out of the distal end of the middle tube, and the diameter of the plugging head is the same as the inner diameter of the outer tube.

As a further solution, the axis of the objective channel and the axis of the instrument channel are parallel to the axis of the lens tube.

As a further technical scheme, two liquid channels are also arranged in the lens tube, and the two liquid channels are symmetrically arranged at two sides of the objective lens channel and the instrument channel.

The utility model provides a pair of tectorial membrane brackets, which are applied to the implantation device of the choledochoscope forceps channel brackets, and comprise: the device comprises a first bracket and a second bracket, wherein an opening is formed in the side wall of the first bracket, and the opening of the first bracket is used for the second bracket and a metal bracket implanter to pass through after the first bracket is self-expanded.

As a further technical scheme, the metal bracket is made of a nickel titanium wire by braiding or made of a laser engraving bracket.

Compared with the prior art, the percutaneous choledochoscope forceps channel bracket implantation device and the tectorial membrane bracket provided by the utility model have the technical advantages that:

the present utility model provides a choledochoscope forceps channel stent implantation device comprising: comprises a choledochoscope and a metal bracket implanter, wherein the choledochoscope comprises a main body, a lens tube and an objective lens; the lens tube is provided with an objective lens channel and an instrument channel, the main body is arranged at the proximal end of the lens tube and is communicated with the objective lens channel and the instrument channel, and the main body is provided with a channel outlet communicated with the instrument channel; the objective lens is mounted at the distal end of the objective lens channel, and the metal stent implanter enters the instrument channel through the channel outlet and passes through the distal end of the instrument channel and is released to the distal end of the choledochoscope. The tectorial membrane support is placed in the affected part with the help of metal support implantation ware, and metal support implantation ware enters into the biliary tract with the help of the choledochoscope, makes things convenient for the placement of tectorial membrane support. The method comprises the following steps: when a patient is operated, the choledochoscope enters the proximal end of the hepatic duct stenosis part through the duodenal forceps channel, and as the metal stent implanter is detachably arranged on the instrument channel through the channel outlet, the coated stent placed in the metal stent implanter passes through the narrow distal end from the distal end of the lens tube by means of the metal stent implanter and reaches the narrow distal end, and is placed on an affected part under the monitoring of the objective lens, in the process, the choledochoscope is guided, the monitoring of the objective lens and the position of the distal end of the metal stent implanter is adjusted from the channel outlet, the coated stent can be placed at the corresponding position without the help of X rays, thereby avoiding that the operator and the patient are exposed to the X rays, and reducing the injury of the X rays to medical staff.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a metal stent implantation device for a choledochoscope forceps channel according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a metal stent implantation device A-A for a choledochoscope forceps channel according to an embodiment of the present utility model;

FIG. 3 is a right side view of a metal implant device (excluding the main body) of a choledochoscope clamp stent according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a metal stent implanter in a metal implanting device of a choledochoscope forceps stent according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of a portion of a metal stent implantation device for a transcholescope forceps according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a metal bracket according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a metal stent according to an embodiment of the present utility model when the metal stent is woven;

FIG. 8 is a schematic diagram of a metal bracket according to an embodiment of the present utility model;

fig. 9 is a view showing the working environment of the metal stent implantation device and the metal stent for a choledochoscope forceps channel according to the embodiment of the utility model.

Icon: 100-choledochoscope; 110-a body; 111-channel inlet; 112-an adjustment knob; 120-mirror tube; 121-an objective lens channel; 122-instrument channel; 123-liquid channel; 130-an objective lens;

300-a metal stent implanter; 310-an outer tube assembly; 311-outer tube; 312-an outer tube handle; 320-middle tube assembly; 321-middle tube; 322-middle tube handle; 330-an inner core assembly; 331-an inner core; 332-plugging head;

410-a first bracket; 420-a second bracket.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Physical quantities in the formulas, unless otherwise noted, are understood to be basic quantities of basic units of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation, or integration.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.

The metal stent implantation device of the choledochoscope forceps channel provided by the embodiment comprises: comprises a choledochoscope 100 and a metal bracket implanter 300, wherein the choledochoscope 100 comprises a main body 110, a lens tube 120 and an objective lens 130;

the scope tube 120 is provided with an objective lens channel 121 and an instrument channel 122, the main body 110 is arranged at the proximal end of the scope tube 120 and is communicated with the objective lens channel 121 and the instrument channel 122, and a channel inlet 111 communicated with the instrument channel 122 is arranged on the main body 110;

objective 130 is mounted to the distal end of objective channel 121 and metal stent implanter 300 is removably mounted to instrument channel 122 through channel entrance 111.

Specifically, as shown in fig. 1 to 3 and 9, the stent graft is placed on the affected area by means of the metal stent implanter 300, and the metal stent implanter 300 is introduced into the biliary tract by means of the choledochoscope, thereby facilitating the placement of the stent graft. The method comprises the following steps: when a patient is operated, the choledochoscope 100 enters the proximal end reaching the stenosis of the hepatic duct through the duodenal forceps channel, the metal stent implanter 300 is detachably arranged on the instrument channel 122 through the channel outlet, the coated stent placed in the metal stent implanter 300 passes through the stenosis from the distal end of the lens tube 120 to the distal end of the stenosis by means of the metal stent implanter 300, the coated stent is placed on the affected part under the monitoring of the objective lens 130, in the process, the choledochoscope 100 is guided, the objective lens 130 is monitored, the position of the distal end of the metal stent implanter 300 is adjusted from the channel inlet 111, and the coated stent can be placed at the corresponding position without the help of X rays, thereby avoiding that both the operator and the patient are exposed to the X rays and reducing the damage of the X rays to medical staff.

In an alternative solution of this embodiment, the main body 110 is further provided with an adjusting knob 112, where the adjusting knob 112 is in transmission connection with the lens tube 120, and the adjusting knob 112 is rotated to adjust the distal direction of the lens tube 120.

Specifically, referring to fig. 1, the adjusting knob 112 is rotatably connected to the main body 110, the adjusting knob 112 is connected to the lens tube 120 through a transmission member, the transmission member can select a traction rope or a traction rod, two ends of the transmission member are respectively connected to the adjusting knob 112 and the distal end of the lens tube 120, the adjusting knob 112 is rotated, and the direction of the distal end of the lens tube 120 is changed after the transmission member is transmitted, so that the direction of the distal end of the lens tube 120 is changed, and the stent graft is better placed on an affected part, more convenient to place the stent graft on the affected part, and better relieving and improving clinical symptoms of a patient.

As shown in particular in connection with fig. 3 and 5, the metal stent implanter 300 includes an outer tube assembly 310, a middle tube assembly 320, and an inner core assembly 330;

the middle tube assembly 320 is sleeved on the inner core assembly 330, and the outer tube assembly 310 is sleeved on the middle tube assembly 320.

The outer tube assembly 310 and the middle tube assembly 320 are relatively movable in the axial direction by the external force. The outer tube assembly 310 and the middle tube assembly 320 are each provided in a tubular shape, and proximal ends of the outer tube assembly 310, the middle tube assembly 320, and the inner core assembly 330 are disposed in the same direction. Before operation, a stent graft is placed between the outer tube assembly 310 and the inner core assembly 330, and the stent graft is sleeved behind the inner core assembly 330 and abuts against the distal end of the middle tube assembly 320. When the covered stent is placed, the metal stent implanter 300 is placed in the instrument channel 122 through the channel inlet 111, the direction of the distal end of the endoscope tube 120 is adjusted, after the distal end of the endoscope tube 120 reaches the proximal end of the hepatic duct stenosis, the metal stent implanter 300 is pushed to the whole body, after the distal end of the metal stent implanter 300 reaches the hepatic duct stenosis, the outer tube component 310 is pushed, the outer tube component 310 and the middle tube component 320 are pushed to perform relative motion, the covered stent sleeved on the inner core component 330 is separated from the outer tube component 310 and then self-swelled, and the covered stent is placed on an affected part, so that the clinical symptoms of a patient are relieved and improved.

In an alternative solution of this embodiment, the outer tube assembly 310 includes an outer tube 311 and an outer tube handle 312, the outer tube handle 312 is fixedly disposed at a proximal end of the outer tube 311, and the outer tube 311 and the outer tube handle 312 are both sleeved on the middle tube assembly 320.

As shown in specific connection with fig. 3 and 5, the outer tube handle 312 is also configured to be tubular and fixedly disposed at the proximal end of the outer tube 311, the outer tube 311 and the outer tube handle 312 are both sleeved on the middle tube assembly 320, and the outer tube handle 312 is disposed near the proximal end of the metal stent implanter 300. When the outer tube 311 and the outer tube handle 312 are sleeved on the middle tube assembly 320, the outer tube handle 312 is disposed near the proximal end of the middle tube assembly 320. The outer tube 311 plays a protective role on the covered stent, the middle tube assembly 320 and the inner core assembly 330, avoids the covered stent, the middle tube assembly 320 and the inner core assembly 330 from contacting with other medical instruments, plays a limiting role on the covered stent, and avoids the covered stent from self-expanding when not placed on an affected part, thereby influencing the use effect of the covered stent and the treatment effect on a patient. Pushing outer tube assembly 310, thereby adjusting the relative position of outer tube assembly 310 and middle tube assembly 320, can be achieved by pushing outer tube handle 312, which is more convenient for the medical staff to operate.

In an alternative technical solution of this embodiment, a plurality of segments of indication scales are provided on the outer wall of the outer tube 311, and the indication scales shown in the plurality of segments are arranged at intervals along the axial direction of the outer tube 311.

Specifically, referring to fig. 3 and fig. 4, a plurality of indication scales are provided on the outer wall of the outer tube 311 at intervals, so that the specific position of the metal stent implanter 300 in the biliary tract and the relative position of the outer tube assembly 310 and the middle tube assembly 320 can be accurately mastered by observing the indication scales on the outer tube 311 at the objective lens 130 and the channel inlet 111, so that the stent graft can be conveniently and accurately placed on the affected part, damage to the biliary tract is avoided, the treatment effect is ensured, and clinical symptoms of a patient are relieved and improved.

In an alternative solution of this embodiment, the middle tube assembly 320 includes a middle tube 321 and a middle tube handle 322, where the middle tube handle 322 is disposed at a proximal end of the middle tube 321;

the outer tube 311 and the outer tube handle 312 are both sleeved on the middle tube 321, and the middle tube 321 and the middle tube handle 322 are both sleeved on the inner core assembly 330.

As shown in specific fig. 4 and 5, the middle tube handle 322 is configured to be tubular and is fixedly disposed at a proximal end of the middle tube handle 322, the outer tube 311 and the outer tube handle 312 are both sleeved on the middle tube 321, the middle tube 321 and the middle tube handle 322 are both sleeved on the inner core assembly 330, and the middle tube handle 322 is disposed near the proximal end of the inner core assembly 330. When the film covered stent is sleeved on the inner core assembly 330 and is abutted with the distal end of the middle tube 321, when the film covered stent is placed, the outer tube handle 312 is pushed, the relative position of the middle tube 321 and the outer tube 311 is changed, so that the outer tube 311 moves towards the direction of the metal stent implanter 300, the film covered stent is separated from the outer tube 311 under the action of the middle tube 321, and the film covered stent is conveniently placed on an affected part. When the relative positions of the middle tube 321 and the outer tube 311 are adjusted, the operation can be realized by pushing the outer tube handle 312 and the middle tube handle 322, so that the operation of medical staff is more convenient.

In an alternative embodiment, the core assembly 330 includes a core 331, a blocking head 332, and a luer connector, where the luer connector is connected to the proximal end of the core 331 and is opposite to the middle tube handle 322;

a stopper 332 is attached to the distal end of the inner core 331 and extends from the distal end of the middle tube 321, the stopper 332 having a diameter equal to the inner diameter of the outer tube 311.

Specifically, referring to fig. 4, the luer connector is connected to the proximal end of the inner core 331, the plugging head 332 is connected to the distal end of the inner core 331, the diameter of the inner core 331 is smaller than that of the middle tube 321, the diameter of the plugging head 332 is the same as that of the outer tube 311, the middle tube 321 and the middle tube handle 322 are both sleeved on the inner core 331, the luer connector is opposite to the proximal end of the middle tube handle 322, the plugging head 332 extends out of the distal end of the middle tube 321, and the luer connector extends out of the proximal end of the middle tube handle 322. The inner core 331 supports the stent graft, so that the stent graft can be smoothly separated from the metal stent implanter 300 along with the change of the relative positions of the middle tube 321 and the outer tube 311, so that the stent graft can be placed at a proper position. When the stent graft is not placed yet, the outer circumferential surface of the blocking head 332 abuts against the inner circumferential surface of the distal end of the outer tube 311, so that the influence on the use effect of the stent graft and the treatment effect on the patient due to the fact that the stent graft is separated from the metal stent implanter 300 when not placed on the affected part is avoided.

In an alternative embodiment, the axis of objective channel 121 and the axis of instrument channel 122 are parallel to the axis of lens tube 120.

As shown in fig. 2 and 3, the objective channel 121 and the instrument channel 122 are circular, and the axes of the objective channel 121, the instrument channel 122 and the lens tube 120 are parallel to each other, so that the metal stent implanter 300 can move in the instrument channel 122 more conveniently, and the therapeutic effect is ensured. Also, in the present embodiment, the objective lens channel 121 is disposed above the instrument channel 122, reducing the visual blind area, and making it easier to observe and grasp the position of the metal stent-implanter 300 in the biliary tract through the objective lens 130.

In an alternative solution of this embodiment, two liquid channels 123 are further disposed in the lens tube 120, and the two liquid channels 123 are symmetrically disposed on two sides of the objective lens channel 121 and the instrument channel 122.

With specific reference to fig. 3, water may be introduced or removed through two fluid passages 123 during the procedure to assist in performing the procedure. And because the two liquid channels 123 are symmetrically arranged on the two sides of the objective lens channel 121 and the instrument channel 122, the blind area can be avoided when water is fed or discharged, and the treatment effect is better ensured.

The metal stent provided in this embodiment is applied to the above-mentioned metal stent implantation device of a choledochoscope forceps path, and includes: the side wall of the first bracket 410 is provided with an opening, and the opening of the first bracket 410 after self-expansion is used for the second bracket 420 and the metal bracket implanter 300 to pass through;

the first stent 410 and the second stent 420 are both disposed in the metal stent implanter 300 in a choledochoscope forceps stent implantation device.

Referring to fig. 4 and fig. 6 in detail, when the stent graft is not yet placed on the affected area, the first stent 410 and the second stent 420 are both sleeved on the inner core 331, the first stent 410 is disposed close to the blocking head 332, the second stent 420 abuts against the proximal end of the middle tube 321, and the outer tube 311 is pushed to separate the first stent 410 and the second stent 420 from the outer tube 311. When a patient is operated, the choledochoscope 100 enters the proximal end reaching the left hepatic duct or the right hepatic duct stenosis through the duodenal forceps channel, passes through the stenosis from the distal end of the endoscope 120 to the distal end of the stenosis, and places the first bracket 410 on the affected part under the monitoring of the objective 130, and the first bracket 410 self-swells to solve the stenosis problem of the hepatic duct at the side; the first stent 410 is withdrawn, the choledochoscope 100 is withdrawn to the intersection of the left hepatic duct and the right hepatic duct, then the choledochoscope 100 enters the hepatic duct on the other side from the opening of the side wall of the first stent 410, reaches the proximal end of the stenosis of the hepatic duct on the other side, and simultaneously the metal stent implanter 300 passes through the forceps channel of the choledochoscope 100, passes through the stenosis of the hepatic duct on the other side under the direct vision of the choledochoscope 100, reaches the distal end of the stenosis, and releases the second stent 420 under the monitoring of the choledochoscope lens, and the second stent 420 self-swells to solve the stenosis problem of the hepatic duct on the other side. Because the side wall of the first bracket 410 is provided with an opening, the first bracket 410 and the second bracket 420 are respectively implanted into the left hepatic duct and the right hepatic duct to realize drainage, thereby relieving and improving clinical symptoms of patients. In addition, in order to better ensure the drainage effect, the end of the second bracket 420 close to the opening is disposed in the opening, so as to avoid the second bracket 420 from separating from the first bracket 410, i.e. after the placement of the stent graft is completed, the section of the stent graft is in a 'Y' shape in the axial direction of the second bracket 420.

In addition, in this embodiment, the length and diameter of the outer tube 311, the length and diameter of the middle tube 321, the length of the inner core 331 and the diameter of the blocking head 332, the length and diameter of the instrument channel 122 and the length and diameter of the lens tube 120 can be set according to specific requirements, so that the mutual matching of the components can be achieved, and the technical purpose of placing the stent graft on the affected part while exposing the operator and the patient to X-rays can be achieved.

In an alternative technical solution of this embodiment, the metal stent is made by braiding a nickel-titanium wire or by laser engraving the stent.

The metal stent in the embodiment can be set as a coated metal stent, a semi-coated metal stent or an uncoated metal stent; the type of particular metal stent may be selected according to particular needs. And the metal bracket can be made of a nickel titanium wire by braiding, as shown in figure 7; alternatively, the metal stent is prepared by laser engraving the stent, as shown in fig. 8, and the preparation method of the specific metal stent can be selected according to specific requirements.

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 (11)

1. A transcatheter metal stent implantation device comprising: comprises a choledochoscope (100) and a metal bracket implanter (300), wherein the choledochoscope (100) comprises a main body (110), a lens tube (120) and an objective lens (130);

the endoscope (120) is provided with an objective lens (130), a channel (121) and an instrument channel (122), the main body (110) is arranged at the proximal end of the endoscope (120) and is communicated with the objective lens (130) channel (121) and the instrument channel (122), and a proximal channel inlet (111) communicated with the instrument channel (122) is arranged on the main body (110);

the objective lens (130) is mounted at the distal end of the passage (121) of the objective lens (130), and the metal stent implanter (300) enters the instrument passage (122) through the proximal passage inlet (111) and passes through the distal end of the instrument passage (122) and is released to the distal end of the choledochoscope.

2. The percutaneous choledochoscope clamp of claim 1, wherein an adjusting knob (112) is further provided on the main body (110), the adjusting knob (112) is in driving connection with the scope (120), and the adjusting knob (112) is rotated to adjust the direction of the distal end of the scope (120).

3. The transcatheter metal stent implantation device of claim 2, wherein the metal stent implanter (300) comprises an outer tube assembly (310), a middle tube assembly (320), and an inner core assembly (330);

the middle pipe assembly (320) is sleeved on the inner core assembly (330), and the outer pipe assembly (310) is sleeved on the middle pipe assembly (320).

4. A percutaneous transluminal endoscopic forceps device as claimed in claim 3, wherein the outer tube assembly (310) comprises an outer tube (311) and an outer tube handle (312) both sleeved on the middle tube assembly (320), the outer tube handle (312) being fixedly arranged at the proximal end of the outer tube (311).

5. The percutaneous choledochoscope forceps channel metal stent implantation device according to claim 4, wherein a plurality of sections of indication scales are arranged on the outer wall of the outer tube (311), and the plurality of sections of indication scales are arranged at intervals along the axis direction of the outer tube (311).

6. The transcatheter metal stent implantation device according to claim 4, wherein the middle tube assembly (320) comprises a middle tube (321) and a middle tube handle (322) both sleeved on the inner core assembly (330), the middle tube handle (322) being disposed at a proximal end of the middle tube (321);

the outer tube (311) and the outer tube handle (312) are both sleeved on the middle tube (321).

7. The transcatheter metal stent implantation device according to claim 6, wherein the core assembly (330) comprises a core (331), a blocking head (332), and a luer fitting, the luer fitting being connected to a proximal end of the core (331) and being opposite the central tube handle (322);

the plugging head (332) is connected to the distal end of the inner core (331) and extends out from the distal end of the middle tube (321), and the diameter of the plugging head (332) is the same as or similar to the inner diameter of the outer tube (311).

8. The transcatheter metal stent implantation device according to any one of claims 1 to 7, wherein the axis of the objective lens (130) channel (121) and the axis of the instrument channel (122) are parallel to the axis of the scope tube (120).

9. The transcatheter metal stent implantation device according to any one of claims 1 to 7, wherein two fluid channels (123) are further provided in the scope tube (120), the two fluid channels (123) being symmetrically arranged on both sides of the objective lens (130) channel (121) and the instrument channel (122).

10. A metal stent for use in a transcatheter colpectic forceps channel metal stent implantation device according to any one of claims 1 to 9, comprising: the device comprises a first bracket (410) and a second bracket (420), wherein an opening is formed in the side wall of the first bracket (410), and the opening of the first bracket (410) is used for the second bracket (420) and the metal bracket implanter (300) to pass through after the first bracket (410) is self-expanded.

11. The metal stent of claim 10, wherein the metal stent is made from a nickel titanium wire braid or from a laser engraved stent.

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