CN118948509B - Cooling components and endoscopes - Google Patents

Abstract

The application belongs to the technical field of medical instruments, and particularly relates to a cooling assembly and an endoscope. The cooling assembly comprises a base and a cooling pipe, wherein the cooling pipe penetrates through the base, the side wall of the cooling pipe comprises a first spraying part, a plurality of first spraying holes are formed in the first spraying part at intervals along the circumferential direction of the cooling pipe, the cooling pipe is provided with a first position, the first spraying part is located on the far side of the far end face of the base and can extend into the self-expanding support when being located at the first position, the cooling pipe further comprises a closable part, the closable part is located on the far side of the first spraying part and can be switched between a closed state and an open state, the closable part is cut off when the closable part is located in the closed state, and the closable part is conducted when the closable part is located in the open state. The present application can help to remove the self-expanding stent from the fistula Kong Bachu and help to reduce the risk of injury to the walls of the fistula wall during the removal of the self-expanding stent.

Description

Cooling module and endoscope

Technical Field

The application belongs to the technical field of medical instruments, and particularly relates to a cooling assembly and an endoscope.

Background

In recent years, a malignant biliary stricture that cannot be resected or a blockage requiring biliary drainage often requires an operation using biliary drainage technology, for example, when a duodenal papilla cannot be passed, a bile duct or gall bladder may be pierced from a stomach wall or a duodenal wall, and then a self-expanding stent that bypasses a luminal organ (for example, a digestive tract such as a stomach or a duodenum) and other luminal organs (for example, a bile duct or gall bladder) may be inserted and left.

The self-expanding stent can form a fistula between the tubular organs, and after the fistula is formed between the tubular organs, the self-expanding stent needs to be pulled out so as to avoid blocking the fistula. At present, a biopsy forceps, a snare and other pulling tools are usually used for pulling out the self-expanding stent, but the self-expanding stent is not easy to be pulled out of the fistula Kong Bachu by adopting the mode, and even the wall of the fistula wall can be damaged.

Disclosure of Invention

It is an object of the present application to provide a cooling assembly and endoscope that can help to remove a self-expanding stent from a fistula Kong Bachu and that can help to reduce the risk of injury to the walls of the fistula walls during removal of the self-expanding stent.

In order to solve the technical problems, the application is realized as follows:

In a first aspect, the application provides a cooling assembly which is applied to medical equipment and can cool a self-expanding bracket, the cooling assembly comprises a base and a cooling pipe, the cooling pipe penetrates through the base, the side wall of the cooling pipe comprises a first spraying part, and the first spraying part is provided with a plurality of first spraying holes which are distributed at intervals along the circumferential direction of the cooling pipe;

The cooling pipe is provided with a first position, the first spraying part is positioned on the far side of the distal end face of the base under the condition that the cooling pipe is positioned at the first position, and the first spraying part can extend into the self-expanding bracket;

the cooling pipe further comprises a closable portion, the closable portion is located on the far side of the first spraying portion and can be switched between a closed state and an open state, the closable portion is cut off when the closable portion is in the closed state, and the closable portion is conducted when the closable portion is in the open state.

In a second aspect, the present application provides an endoscope comprising the cooling assembly described above, the insertion portion of the endoscope comprising a base, and the cooling tube being integrated into the insertion portion.

The beneficial technical effects of the application are as follows:

In the application, the first spraying part on the cooling pipe is provided with the first spraying hole, before the self-expanding bracket is pulled out, the cooling pipe can be positioned at a first position, the first spraying part stretches into the self-expanding bracket, then cooling water is injected into the cooling pipe, the cooling water is sprayed out through the first spraying hole, thereby cooling the self-expanding bracket, the cooled self-expanding bracket can generate radial contraction, thereby reducing friction and adhesion between the self-expanding bracket and surrounding tissues, and then the self-expanding bracket is pulled out by adopting a pulling-out tool relatively easily, thereby reducing the risk of damage to the wall of the fistula.

In addition, a plurality of first spraying holes are formed, the first spraying holes are distributed at intervals along the circumferential direction of the cooling pipe, and cooling water sprayed from the first spraying holes can act on the inner hole wall of the self-expanding support from a plurality of directions, so that the self-expanding support can be cooled more uniformly, friction and adhesion between each part of the self-expanding support in the circumferential direction and surrounding tissues are reduced, and further the risk of damage to the wall of the fistula hole is reduced.

Furthermore, the closable portion can be switched between a closed state in which cooling water introduced into the cooling pipe is sprayed out from the first spray holes to provide a uniform cooling effect and an open state in which cooling water introduced into the cooling pipe is sprayed out from the first spray holes and the distal pipe orifice of the cooling pipe to provide a stronger cooling capacity for a part requiring strong cooling in a targeted manner. Therefore, after the structure of the application is adopted, the state of the closable part can be flexibly adjusted according to the actual temperature and the cooling requirement of the fistula stent so as to enable the cooling assembly to be in a proper cooling mode, and the water outlet direction of the cooling pipe is adjusted so as to enable the water outlet direction of the cooling pipe to face different parts of the fistula stent, thereby cooling the fistula stent more optimally and accurately.

Drawings

FIG. 1 is a schematic view of an endoscope according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of the application at A in FIG. 1;

FIG. 3 is a cross-sectional view showing a part of the structure of an endoscope in a state where a closable portion is opened according to an embodiment of the present application;

FIG. 4 is a schematic view of a portion of a cooling assembly in a first position of a cooling tube and a closable portion in a closed state according to an embodiment of the present application;

FIG. 5 is a schematic view of a portion of a cooling assembly with a closable portion in a closed state and a cooling tube in a first position according to another embodiment of the present application;

FIG. 6 is a schematic diagram of a portion of a cooling assembly in a first position of a cooling tube according to an embodiment of the present application;

FIG. 7 is a schematic illustration of the cooling assembly mated with a self-expanding stent with the cooling tube in a first position and the closable portion in a closed state according to an embodiment of the present application;

fig. 8 is a schematic structural view of a pull-in cord according to an embodiment of the present application;

FIG. 9 is a schematic view showing a part of the structure of an endoscope according to an embodiment of the present application;

Fig. 10 is an enlarged schematic view of the present application at B in fig. 9.

Reference numerals illustrate:

100. The self-expanding stent comprises a base, 101, a penetrating hole, 102, a penetrating channel, 110, a front end seat, 120, a penetrating pipe, 200, a cooling pipe, 210, a first spraying part, 211, a first spraying hole, 220, a closable part, 230, a second spraying part, 231, a second spraying hole, 300, a sleeve taking rope, 301, a first rope section, 302, a second rope section, 310, a lantern ring, 320, an operating part, 400, a fixing sleeve, 500, an operating handle, 510, a handle shell, 520, a first driving part, 530, a second driving part, 540, a third driving part, 610, a stomach wall, 620, a liver liner wall and 700.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that some, but not all embodiments of the application are described. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The cooling assembly and the endoscope provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

In various embodiments of the present application, "proximal" and "distal" refer to the endoscope and its components in the environment of use, relative to the user's proximal-distal position, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

Referring to fig. 3 and 4, a cooling assembly is disclosed in an embodiment of the present application, which is applied to a medical instrument, such as an endoscope or a snare device for removing an unwanted object in a human body, and is capable of cooling a self-expanding stent 700, the cooling assembly including a base 100 and a cooling tube 200, the cooling tube 200 being disposed through the base 100, wherein the base 100 is a base portion of the cooling assembly, which is capable of providing an installation space for the cooling tube 200 and of providing radial support for the cooling tube 200. When the medical device is an endoscope, the base 100 may be an insertion portion of the endoscope, and when the medical device is a snare device, the base 100 may be a catheter of the snare device, and the catheter may be inserted into a human body through an instrument channel of the insertion portion of the endoscope.

The side wall of the cooling pipe 200 includes a first spraying portion 210, the first spraying portion 210 is provided with a plurality of first spraying holes 211 distributed along the circumferential direction of the cooling pipe 200 at intervals, and the first spraying holes 211 penetrate through the side wall of the cooling pipe 200, so that the inner space and the outer space of the cooling pipe 200 are communicated, and after cooling water is introduced into the cooling pipe 200, the cooling water can be sprayed out from the periphery of the cooling pipe 200, so that the inner hole wall of the self-expanding bracket 700 is cooled. Optionally, one or more groups of first spraying holes 211 may be provided, and the groups of first spraying holes 211 are distributed at intervals along the axial direction of the first spraying portion 210, and each group of first spraying holes 211 includes a plurality of first spraying holes 211 distributed at intervals along the circumferential direction of the cooling pipe 200, so that the number of the first spraying holes 211 is more so provided to enhance the cooling effect on the self-expanding bracket 700.

The cooling tube 200 has a first position, in which the first shower portion 210 is located distal to the distal end face of the base 100 and the first shower portion 210 is capable of extending into the self-expanding stent 700, that is, the outer dimension of the first shower portion 210 and the outer dimension of the tube section of the cooling tube 200 located distal to the first shower portion 210 are both smaller than the inner bore dimension of the self-expanding stent 700, such that the first shower portion 210 is capable of entering the self-expanding stent 700. For example, when the cross section of the first spraying portion 210 is circular, the outer diameter of the first spraying portion 210 is smaller than the inner hole diameter of the self-expanding bracket 700, however, the cross section of the first spraying portion 210 may not be circular, it may be square, etc., and the shape of the first spraying portion 210 is not limited in the present application.

The cooling tube 200 further comprises a closable portion 220, the closable portion 220 is located at the distal side of the first spraying portion 210, the closable portion 220 can be switched between a closed state and an open state, the closable portion 220 is cut off under the condition that the closable portion 220 is in the closed state, that is, a flow passage in the closable portion 220 is cut off, at the moment, a proximal end nozzle of the cooling tube 200 is not communicated with a distal end nozzle, the proximal end nozzle of the cooling tube 200 is communicated with the first spraying hole 211, and under the condition that the closable portion 220 is in the open state, the closable portion 220 is communicated, that is, a flow passage in the closable portion 220 is communicated, at the moment, the proximal end nozzle of the cooling tube 200 is communicated with the distal end nozzle, and the proximal end nozzle of the cooling tube 200 is communicated with the first spraying hole 211.

In the present application, the first spraying portion 210 on the cooling tube 200 is provided with the first spraying hole 211, before the self-expanding stent 700 is removed, the cooling tube 200 can be positioned at the first position, the first spraying portion 210 extends into the self-expanding stent 700, then cooling water is injected into the cooling tube 200, the cooling water is sprayed out through the first spraying hole 211, thereby cooling the self-expanding stent 700, the cooled self-expanding stent 700 can shrink radially, thereby reducing friction and adhesion between the self-expanding stent 700 and surrounding tissues, and then the self-expanding stent 700 is removed by using a removing tool relatively easily, thereby reducing the risk of damage to the wall of the fistula.

In addition, the first spraying holes 211 of the present embodiment are provided with a plurality of first spraying holes 211, and the plurality of first spraying holes 211 are distributed at intervals along the circumferential direction of the cooling pipe 200, and the cooling water sprayed from the first spraying holes 211 can act on the inner hole wall of the self-expanding bracket 700 from a plurality of directions, so that the self-expanding bracket 700 can be cooled more uniformly, friction and adhesion between each part of the self-expanding bracket 700 in the circumferential direction and surrounding tissues are reduced, and further the risk of damage to the wall of the fistula is reduced.

Furthermore, the closable portion 220 can be switched between a closed state in which the cooling water introduced into the cooling pipe 200 is sprayed from the first spray holes 211 to provide a uniform cooling effect, and an open state in which the cooling water introduced into the cooling pipe 200 is sprayed from the first spray holes 211 and the distal nozzle of the cooling pipe 200 to provide a stronger cooling capability. Therefore, after the structure of the present application is adopted, the state of the closable portion 220 can be flexibly adjusted according to the actual temperature and cooling requirement of the fistula stent so as to enable the cooling assembly to be in a proper cooling mode (a cooling mode with even and slightly strong cooling capability and a cooling mode with even and stronger cooling capability), and the water outlet direction of the cooling tube 200 can be adjusted so as to enable the water outlet direction of the cooling tube 200 to face different parts of the fistula stent, thereby cooling the fistula stent more optimally and more precisely.

For example, when different cooling intensities are required at different portions of the fistula tract stent, for example, when the temperature of the distal end (right end in fig. 7) of the fistula tract stent is higher than that of other portions of the fistula tract stent, the closable portion 220 may be switched to an open state, and the distal end orifice of the cooling tube 200 is positioned at the distal end of the fistula tract stent, at this time, cooling water can be sprayed from the first spraying holes 211 to uniformly cool the inner hole walls of other portions of the fistula tract stent except the distal end, and cooling water can be sprayed from the distal end orifice of the cooling tube 200 to strongly cool the distal end of the fistula tract stent, thereby cooling the fistula tract stent more preferably and more accurately.

In addition, the cooling tube 200 of the present application may be used as an instrument tube in some situations, i.e., the cooling tube 200 may be used for inserting surgical instruments such as bioptomes, and the like, wherein the cooling tube 200 may be opened to facilitate passage of the surgical instruments.

In an alternative embodiment, the cooling tube 200 may be in the first position at all times, that is, the cooling tube 200 may be secured to the base 100 and located in the first position. Referring to fig. 2 and 3, in another alternative embodiment, the cooling tube 200 is slidably disposed through the base 100 such that the cooling tube 200 is switched between a first position and a second position, and the first shower portion 210 is disposed in the base 100 when the cooling tube 200 is disposed in the second position.

In this embodiment, before the cooling component is inserted into the human body, the cooling tube 200 may be switched to the second position, where the first spraying portion 210 is located in the base 100, which may reduce the length of the portion of the cooling tube 200 extending from the distal end surface of the base 100, thereby facilitating the insertion of the cooling component into the human body and reducing the risk of damaging human tissue by the portion of the cooling tube 200 extending from the distal end surface of the base 100.

In a further embodiment, with the cooling tube 200 in the second position, the distal surface of the cooling tube 200 is positioned within the base 100, and no portion of the cooling tube 200 beyond the distal surface of the cooling tube 200 is present, thereby facilitating insertion of the cooling assembly into the human body.

In some embodiments, the cooling assembly may further include a first conductive wire, a deformation memory metal bracket is disposed in the closable portion 220, and is electrically connected to the first conductive wire, wherein when the deformation memory metal bracket is in a normal state, the deformation memory metal bracket is deformed in a shrunken state, and the inner wall of the closable portion 220 is attached to be in a closed state, and when the deformation memory metal bracket is energized through the first conductive wire, the deformation memory metal bracket expands, and is no longer deformed in a shrunken state, and the inner wall of the closable portion 220 is no longer attached to be in an open state.

In still other embodiments, the base 100 may include a movable extrusion therein, where the movable extrusion may be movable or rotatable, the extrusion being movable in a direction toward or away from the closable portion 220, and the cooling assembly may further include a fourth driving member coupled to the extrusion and movable to cause the extrusion to squeeze or release the closable portion 220. When the pressing member presses the closable portion 220, the inner wall of the closable portion 220 is deformed to be in a closed state, and when the pressing member releases the closable portion 220, the closable portion 220 is gradually expanded, no further deformation to be in a collapsed state, and the inner wall of the closable portion 220 is not adhered, so that the closable portion 220 is in an open state. The fourth driving member may be a haulage rope through which the extrusion is driven to rotate.

To simplify the structure of the cooling assembly, referring to fig. 3 and 4, in an alternative embodiment, the closable portion 220 has elasticity, that is, the closable portion 220 is elastically deformable, and the closable portion 220 may be made of an elastic material, or an elastic bracket may be provided in the closable portion 220, so that the closable portion 220 has elasticity, and in the case that the cooling pipe 200 is located at the first position, the closable portion 220 collapses under its own elasticity to be in the closed state. Specifically, when the closable portion 220 collapses, the wall of the closable portion 220 will collapse inward, so that the wall of the closable portion 220 will fit to intercept the flow path in the closable portion 220 and keep the closable portion 220 in the closed state, wherein the base 100 is provided with a through hole 101, the cooling tube 200 is slidably disposed in the through hole 101, and when the closable portion 220 collapses, referring to fig. 4, the width of the closable portion 220 is larger than the diameter of the through hole 101.

With the cooling tube 200 in the second position, the closable portion 220 is located within the base 100, and the base 100 compresses the closable portion 220 such that the closable portion 220 expands and is in an open state, where the expansion is relative to the collapsed state described above. Specifically, when the closable portion 220 gradually enters the through hole 101 in the base 100, the inner wall of the through hole 101 presses the closable portion 220, so as to reduce the width of the closable portion 220, so that the closable portion 220 radially expands in a direction perpendicular to the width direction, that is, the wall of the tube where the closable portion 220 collapses gradually expands outwards, so that the walls of the tube where the closable portion 220 is attached gradually separate, and the flow passage in the closable portion 220 is opened, so that the closable portion 220 is in an open state.

It can be seen that, the present embodiment utilizes the elastic fit of the closable portion 220 to match the position relationship between the closable portion and the base 100, so as to switch the closable portion 220 between the open state and the closed state, without providing additional driving mechanisms (such as the first conductive wire or the extrusion member, the fourth driving member), which can simplify the structure of the cooling assembly, reduce the external dimension of the cooling assembly, and facilitate the insertion of the cooling assembly into a human body.

Referring to fig. 3, in an alternative embodiment, the base 100 is provided with a through hole 101, the cooling tube 200 is slidably disposed in the through hole 101, and all portions of the closable portion 220 in the circumferential direction thereof are adhered to the inner wall of the through hole 101 when the cooling tube 200 is located in the second position.

In the case where the wall of the closable portion 220 is collapsed inward to conform to the wall of the closable portion 220, the closable portion 220 is in a closed state, and in the process of switching the closable portion 220 from the closed state to the open state, the closable portion 220 is gradually expanded under the extrusion of the base 100 so that the wall of the closable portion 220 is not adhered any more, but is opened one opening. While the closable portion 220 of the present embodiment is in an open state, all portions of the closable portion 220 in the circumferential direction thereof are fitted to the inner wall of the through hole 101, which makes the opening of the closable portion 220 larger, facilitating passage of larger-sized instruments when the cooling tube 200 is used as an instrument tube. Of course, when the cooling tube 200 is located at the second position, a part of the closable portion 220 in the circumferential direction thereof may be in contact with the inner wall of the through hole 101, or another part may not be in contact with the inner wall of the through hole 101.

To further enhance the cooling effect on the self-expanding stent 700, referring to fig. 5, in an alternative embodiment, the cooling tube 200 further includes a second spraying portion 230, the second spraying portion 230 is located near the first spraying portion 210, and a plurality of second spraying holes 231 are formed in the second spraying portion 230 and are spaced apart along the circumferential direction of the cooling tube 200.

With the cooling tube 200 in the first position, the second shower portion 230 is located distally of the distal face of the base 100, and the second shower portion 230 can be in the first state.

With the cooling tube 200 in the first position and the second spray portion 230 in the first state, the second spray portion 230 protrudes radially outward from the first spray portion 210, that is, the second spray portion 230 protrudes beyond the first spray portion 210 in a direction extending from the inside to the outside of the second spray portion 230, and the second spray holes 231 on the second spray portion 230 can correspond to the end face of the self-expanding stent 700, that is, the second spray holes 231 are disposed opposite to the end face of the self-expanding stent 700 in the axial direction of the self-expanding stent 700, and the second spray holes 231 are located on the proximal side of the fistula stent, where the end face is the proximal end face of the self-expanding stent 700, that is, the left end face in fig. 7. It should be noted that the self-expanding stent 700 in fig. 7 penetrates the stomach wall 610 and the intrahepatic bile duct wall 620..

Specifically, the second spraying holes 231 may be disposed at a portion of the second spraying portion 230 radially protruding beyond the first spraying portion 210, and the second spraying holes 231 may be disposed in one or at least two groups, and the at least two groups of second spraying holes 231 are spaced apart along a direction extending from the inside to the outside of the second spraying portion 230, and each group of second spraying holes 231 includes a plurality of second spraying holes 231 spaced apart along a circumferential direction of the cooling tube 200.

In this embodiment, when the first spraying portion 210 extends into the self-expanding stent 700, the second spraying portion 230 is located near the self-expanding stent 700, and at this time, the second spraying portion 230 is located in the first state, and the second spraying holes 231 are opposite to the proximal surface of the self-expanding stent 700, so that the cooling water sprayed from the second spraying holes 231 can be sprayed to the proximal surface of the self-expanding stent 700, thereby cooling the proximal surface of the self-expanding stent 700. It can be seen that, after the structure of this embodiment is adopted, the cooling tube 200 can cool not only the inner hole wall of the self-expanding stent 700, but also the proximal end surface of the self-expanding stent 700, which can improve the cooling effect of the self-expanding stent 700, so as to further reduce the friction and adhesion between each part of the self-expanding stent 700 in the circumferential direction and surrounding tissues, and further reduce the risk of damage to the wall of the fistula.

With continued reference to fig. 5, in an alternative embodiment, in the case where the cooling pipe 200 is located at the first position and the second spraying portion 230 is in the first state, the second spraying portion 230 is in a spherical shape, and all portions of the second spraying portion 230 in the circumferential direction thereof radially protrude outward from the first spraying portion 210, so that the second spraying holes 231 may be distributed within a range of three hundred sixty degrees, so that the second spraying holes 231 correspond to the portions of the end surface of the self-expanding bracket 700 in the circumferential direction thereof, so as to more uniformly cool the end surface of the self-expanding bracket 700. Of course, the second spraying portion 230 may not be in a balloon shape, and may be in a tube shape, in which case the second spraying portion 230 is located at one side of the first spraying portion 210, and in this case, a pipe section of the cooling pipe 200 located near the second spraying portion 230 is not coaxial with the first spraying portion 210.

It should be noted that, when this embodiment is combined with the embodiment of "the cooling tube 200 may be fixed to the base 100 and located at the first position", the second spraying portion 230 may be always in the first state.

In some embodiments, the cooling assembly may further include a second conductive wire, wherein the second spraying portion 230 is provided with a deformation memory alloy support, the deformation memory alloy support is electrically connected with the second conductive wire, the second spraying portion 230 is in a second state when the deformation memory alloy support is in a normal state, the second spraying portion 230 is radially inward protruding from or flush with the first spraying portion 210, and the deformation memory alloy support is radially expanded when the deformation memory alloy support is energized through the second conductive wire, so that the deformation memory alloy support is in the first state, and the second spraying portion 230 radially outward protrudes from the first spraying portion 210.

In other embodiments, the second spraying portion 230 is an elastic deformation body, the cooling assembly further comprises a traction member, the distal end of the traction member is connected with the distal end of the elastic deformation body, the elastic deformation body is in the second state in the natural state, and the traction member drives the distal end of the elastic deformation body to move towards the proximal end under the condition that the proximal end of the traction member is pulled, so that the elastic deformation body is elastically deformed, and the elastic deformation body is in the first state. The traction element may be a traction rope, a transmission rod which has a certain elastic deformation capability and is capable of transmitting thrust force, such as a plastic or metal slender rod, a steel wire or the like.

In still other embodiments, the second spray portion 230 is a flexible deformation body, and the cooling assembly further includes a drive rod coupled to a distal end of the flexible deformation body, the drive rod being movable relative to the cooling tube 200 to switch the flexible deformation body between the first state and the second state.

To simplify the structure of the cooling assembly, in an alternative embodiment, the second spraying part 230 has elasticity, that is, the second spraying part 230 can be elastically deformed, and the second spraying part 230 may be made of an elastic material, or an elastic bracket may be provided in the second spraying part 230, so that the second spraying part 230 has elasticity, and when the cooling pipe 200 is located at the first position and the second spraying part 230 is in the natural state, the second spraying part 230 is in the first state, the cooling pipe 200 is slidably inserted through the base 100 so that the cooling pipe 200 is switched between the first position and the second position, and when the cooling pipe 200 is located at the second position, the second spraying part 230 is located in the base 100, and the base 100 presses the second spraying part 230 so that the second spraying part 230 radially protrudes or is flush with the first spraying part 210 and is in the second state.

Specifically, the base 100 is provided with a through hole 101, the cooling pipe 200 is slidably disposed through the through hole 101, and when the second spraying portion 230 of the cooling pipe 200 located at the first position is in the first state, the second spraying portion 230 is located at a distal side of the distal end surface of the base 100, and an outer diameter of the second spraying portion 230 is larger than a diameter of the through hole 101. When the second spraying portion 230 gradually enters the through hole 101 in the base 100, the inner wall of the through hole 101 presses the second spraying portion 230, so as to reduce the outer diameter of the second spraying portion 230, and radially shrink the second spraying portion 230, so that the second spraying portion 230 radially protrudes inward or is flush with the first spraying portion 210. It should be noted that, when the inner wall of the through hole 101 is relatively flat, the second spraying portion 230 will be flush with the first spraying portion 210, and when the protruding structure exists on the inner wall of the through hole 101, the protruding structure will press the second spraying portion 230, so that the second spraying portion 230 protrudes radially inward from the first spraying portion 210.

It can be seen that, in this embodiment, the second spraying portion 230 is elastically matched with the position relationship between the second spraying portion 230 and the base 100, so that the second spraying portion 230 is switched between the first state and the second state, and no additional driving mechanism (such as a second conductive wire) is required, which simplifies the structure of the cooling assembly, reduces the external dimension of the cooling assembly, and is more beneficial to inserting the cooling assembly into a human body.

Referring to fig. 3 to 8, in an alternative embodiment, the cooling assembly further includes a pull-in cord 300, the base 100 is provided with a through channel 102, the through channel 102 is spaced from the cooling tube 200, the pull-in cord 300 includes a collar 310 and an operation portion 320 connected to each other, the collar 310 is disposed at a distal end of the operation portion 320, the operation portion 320 is movably disposed through the through channel 102, and the operation portion 320 is capable of moving relative to the through channel 102, so that the collar 310 is located at a distal end of a distal end surface of the base 100 and is pulled in a self-expanding stent 700. Alternatively, a penetrating pipe 120 may be disposed on the base 100, where the penetrating pipe 120 penetrates the base 100, and a penetrating channel 102 is formed in the penetrating pipe 120.

In the present application, the pull-out cord 300 is threaded in the threading channel 102, the pull-out cord 300 includes an operation portion 320 and a collar 310 connected to each other, the operation portion 320 is movably threaded in the threading channel 102, and when the operation portion 320 is controlled to move relative to the threading channel 102, the collar 310 can be moved to a distal side of a distal end face of the front end shell and separated from the distal end face of the front end shell, so that the self-expanding stent 700 can be tightly sleeved near the base 100 by using the collar 310, so as to facilitate the removal of the self-expanding stent 700.

Referring to fig. 6 and 8, in a further embodiment, in a case where the collar 310 is located distal to the distal end face of the base 100, the collar 310 is bent with respect to the operation portion 320 such that the space within the collar 310 faces the cooling tube 200, and the bending angle between the collar 310 and the operation portion 320 is ninety degrees.

In this embodiment, in the case that the collar 310 is located at the distal side of the distal end face of the base 100, the collar 310 is bent with respect to the operation portion 320, so that the space in the collar 310 faces the cooling tube 200, and thus the cooling tube 200 can be extended into the collar 310, and thus the cooling tube 200 can be slightly bent (in the state shown in fig. 6) by using the collar 310, so as to change the direction of the distal end of the cooling tube 200, and facilitate the entry of the cooling tube 200 into the inclined expandable stent. And the bending angle between the collar 310 and the operation part 320 is ninety degrees in this embodiment, so that when the collar 310 bends the cooling tube 200, the positive pressure applied by the collar 310 to the cooling tube 200 is perpendicular to the axis of the cooling tube 200, which can enable a large friction force between the collar 310 and the cooling tube 200 to reduce the risk of slipping of the collar 310 relative to the cooling tube 200, thereby stably bending the cooling tube 200. Of course, the bending angle between the collar 310 and the operation portion 320 may be greater or less than ninety degrees, which is not limited by the present application.

In a further embodiment, the pull-cord 300 is made of a memory alloy, and the pull-cord 300 is tensioned to bend the cooling tube 200 in case the pull-cord 300 is sprayed with cooling water.

Referring to fig. 8, in an alternative embodiment, the hitching string 300 includes a first string portion 301 and a second string portion 302 disposed in parallel, the distal end of the first string portion 301 and the distal end of the second string portion 302 being connected, the distal end of the first string portion 301 and the distal end of the second string portion 302 being bent in directions away from each other to form a collar 310, in which case a portion of the first string portion 301 other than the collar 310 and a portion of the second string portion 302 other than the collar 310 together form an operation portion 320, the collar 310 being capable of being located distally of the distal end face of the base 100 in the case the first string portion 301 and the second string portion 302 are simultaneously moved in a direction extending from the proximal end to the distal end of the base 100, and a cross-sectional area of a hitching space formed in the collar 310 being changed in the case the first string portion 301 is moved relative to the second string portion 302.

In a further embodiment, the cooling assembly further comprises a fixing sleeve 400, the fixing sleeve 400 is slidably arranged in the penetrating channel 102, a through hole penetrating through the fixing sleeve 400 along the axial direction of the fixing sleeve 400 is formed in the fixing sleeve 400, the first rope portion 301 is penetrated in the through hole, the second rope portion 302 is fixedly connected with the fixing sleeve 400, and in the condition that the collar 310 is located on the far side of the distal end face of the front end shell, a part of the fixing sleeve 400 extends out of the penetrating channel 102, so that the fixing sleeve 400 can be used for restraining the part of the sleeve taking rope 300 located between the collar 310 and the distal end hole of the penetrating channel 102, and therefore bending deformation of the part is prevented, and the collar 310 is guaranteed to be located at a preset position.

Referring to fig. 1, 9 and 10, an embodiment of the present application further discloses an endoscope including the cooling assembly according to any of the above embodiments, an insertion portion of the endoscope includes a base 100, and a cooling tube 200 is integrated in the insertion portion. Because the endoscope of the embodiment includes the cooling assembly, the endoscope has the beneficial effects of the cooling assembly, and the description thereof is omitted. The endoscope in the embodiment of the application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope and the like, and the embodiment of the application does not limit the type of the endoscope.

The cooling assembly is integrated on the endoscope, and when the endoscope of the embodiment of the application is used for taking out a target object in a human body, the endoscope is only required to be inserted into the human body for cooling operation, and a snare device integrated with the cooling assembly is not required to be inserted into the endoscope, so that the flow of cooling the expandable bracket can be simplified.

In an alternative embodiment, the insertion portion includes a front end 110 and an instrument tube having an instrument channel therein, the base 100 being the front end 110, and the cooling tube 200 being an instrument tube (not shown). The present embodiment uses the instrument tube as the cooling tube 200, so that the purpose of one object with multiple purposes can be achieved, and two parallel pipelines (the instrument tube and the cooling tube 200) are not required to be arranged at the insertion portion, thereby achieving the purpose of reducing the diameter of the insertion portion, and facilitating the miniaturization design of the insertion portion.

Referring to fig. 9 and 10, in an alternative embodiment, the endoscope further includes an operation handle 500, wherein a distal end of the operation handle 500 is connected to a proximal end of the insertion portion, the operation handle 500 includes a handle housing 510, a first driving member 520, a second driving member 530, and a third driving member 540, the first driving member 520, the second driving member 530, and the third driving member 540 are movable with respect to the handle housing 510, the first driving member 520 is connected to the first string portion 301, the second driving member 530 is connected to the second string portion 302, and the operation portion 320 is moved with respect to the base 100 by driving the first driving member 520 and the second driving member 530 to move, so that the pulling area of the collar 310 can be adjusted by driving the first driving member 520 or the second driving member 530 alone. The cooling tube 200 is connected to a third driving member 540, by which the cooling tube 200 is driven to slide between a first position and a second position.

The foregoing embodiments of the present application mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein. The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (8)

1. A cooling assembly applied to a medical apparatus and capable of cooling a self-expanding bracket (700), wherein the cooling assembly comprises a base (100) and a cooling pipe (200), the cooling pipe (200) is penetrated through the base (100), the side wall of the cooling pipe (200) comprises a first spraying part (210), and the first spraying part (210) is provided with a plurality of first spraying holes (211) distributed at intervals along the circumferential direction of the cooling pipe (200);

The cooling tube (200) has a first position, the first spray portion (210) is located distally of the distal end face of the base (100) with the cooling tube (200) in the first position, and the first spray portion (210) is extendable into the self-expanding stent (700);

the cooling tube (200) further comprises a closable portion (220), the closable portion (220) being located distally of the first spray portion (210), the closable portion (220) being switchable between a closed state, in which the closable portion (220) is truncated, and an open state, in which the closable portion (220) is in the open state, the closable portion (220) is conductive;

The cooling tube (200) is slidably arranged through the base (100) so as to switch the cooling tube (200) between a first position and a second position;

The first shower portion (210) is located within the base (100) with the cooling tube (200) in the second position;

The closable portion (220) has elasticity, and the closable portion (220) collapses under the effect of its own elasticity to be in the closed state when the cooling pipe (200) is in the first position, and the closable portion (220) is located in the base (100) when the cooling pipe (200) is in the second position, and the base (100) presses the closable portion (220) to expand the closable portion (220) to be in the open state.

2. The cooling assembly according to claim 1, wherein the base (100) is provided with a through hole (101), the cooling tube (200) is slidably disposed in the through hole (101), and all parts of the closable portion (220) in the circumferential direction thereof are fitted to the inner wall of the through hole (101) when the cooling tube (200) is located at the second position.

3. The cooling assembly according to claim 1 or 2, wherein the cooling tube (200) further comprises a second spraying portion (230), the second spraying portion (230) is located near the first spraying portion (210), and a plurality of second spraying holes (231) are formed in the second spraying portion (230) and distributed at intervals along the circumferential direction of the cooling tube (200);

With the cooling tube (200) in the first position, the second spray portion (230) is located distal to a distal end face of the base (100), and the second spray portion (230) is capable of being in a first state;

When the cooling pipe (200) is located at the first position and the second spraying portion (230) is in the first state, the second spraying portion (230) radially protrudes outwards from the first spraying portion (210), and the second spraying holes (231) in the second spraying portion (230) can correspond to the end face of the self-expanding bracket (700).

4. A cooling assembly according to claim 3, wherein the second spray portion (230) is balloon-shaped with the cooling tube (200) in the first position and the second spray portion (230) in the first state, and all portions of the second spray portion (230) in the circumferential direction thereof radially protrude outward from the first spray portion (210).

5. The cooling assembly of claim 4, wherein the second spray portion (230) is resilient, the second spray portion (230) being in the first state when the cooling tube (200) is in the first position and the second spray portion (230) is in a natural state;

The cooling pipe (200) is arranged on the base (100) in a sliding penetrating mode, so that the cooling pipe (200) is switched between a first position and a second position, the second spraying part (230) is arranged in the base (100) under the condition that the cooling pipe (200) is arranged at the second position, and the base (100) extrudes the second spraying part (230) to enable the second spraying part (230) to protrude inwards or be flush with the first spraying part (210) in a radial direction and be in a second state.

6. The cooling assembly according to claim 1, further comprising a pull-in cord (300), wherein the base (100) is provided with a through channel (102), the pull-in cord (300) comprises a collar (310) and an operating portion (320) which are connected, the collar (310) is provided at a distal end of the operating portion (320), the operating portion (320) is movably provided through the through channel (102), and the operating portion (320) is movable relative to the through channel (102) so that the collar (310) is located at a distal side of a distal end surface of the base (100) and is used for pulling the self-expanding stent (700);

with the collar (310) distal to the distal face of the base (100), the collar (310) is bent relative to the operating portion (320) such that a space within the collar (310) is oriented toward the cooling tube (200), the angle of bending between the collar (310) and the operating portion (320) being ninety degrees.

7. An endoscope comprising a cooling assembly according to any of claims 1 to 6, the insertion portion of which comprises the base (100), the cooling tube (200) being integrated in the insertion portion.

8. The endoscope of claim 7, wherein the insertion portion comprises a front end seat (110) and an instrument tube, wherein an instrument channel is provided in the instrument tube, wherein the base (100) is the front end seat (110), and wherein the cooling tube (200) is the instrument tube.