Cooling components and endoscopes

Abstract

The present application belongs to the field of medical device technology, and specifically relates to a cooling assembly and an endoscope. The cooling assembly includes a base and a cooling tube, the cooling tube is arranged through the base, and the side wall of the cooling tube includes a first spray part, and the first spray part is provided with a plurality of first spray holes spaced along the circumference of the cooling tube; the cooling tube has a first position, and when the cooling tube is in the first position, the first spray part is located at the far side of the distal end surface of the base, and the first spray part can extend into the self-expanding stent; the cooling tube also includes a closable part, which is located at the far side of the first spray part, and the closable part can switch between a closed state and an open state, and when the closable part is in a closed state, the closable part is cut off; when the closable part is in an open state, the closable part is turned on. The present application can help to remove the self-expanding stent from the fistula, and help to reduce the risk of damage to the fistula wall during the removal of the self-expanding stent.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to a cooling component and an endoscope. Background Art

[0002] In recent years, unresectable malignant biliary strictures or obstructions requiring biliary drainage usually require surgery using biliary drainage technology. For example, when the duodenal papilla cannot be passed, the bile duct or gallbladder can be punctured from the stomach wall or duodenal wall, and then a self-expanding stent that bypasses the luminal organs (such as the digestive tract such as the stomach or duodenum) and other luminal organs (such as the bile duct or gallbladder, etc.) can be inserted and retained.

[0003] A self-expanding stent can form a fistula between lumen organs. After the fistula is formed between the lumen organs, the self-expanding stent needs to be removed to avoid blocking the fistula. Currently, the self-expanding stent is usually removed using removal tools such as biopsy forceps and snares, but it is not easy to remove the self-expanding stent from the fistula using the above method, and it may even damage the fistula wall. Summary of the invention

[0004] The purpose of the present application is to provide a cooling assembly and an endoscope that can help remove a self-expanding stent from a fistula and help reduce the risk of damaging the fistula wall during the removal of the self-expanding stent.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application provides a cooling assembly, which is applied to a medical device and can cool a self-expanding stent. The cooling assembly includes a base and a cooling tube. The cooling tube is arranged through the base. The side wall of the cooling tube includes a first spray portion. The first spray portion is provided with a plurality of first spray holes spaced apart along the circumference of the cooling tube.

[0007] The cooling tube has a first position, and when the cooling tube is located at the first position, the first spray portion is located at the distal side of the distal end surface of the base, and the first spray portion can extend into the self-expanding stent;

[0008] The cooling pipe also includes a closable portion, which is located on the far side of the first spray portion. The closable portion can be switched between a closed state and an open state. When the closable portion is in the closed state, the closable portion is cut off; when the closable portion is in the open state, the closable portion is turned on.

[0009] In a second aspect, the present application provides an endoscope, comprising the above-mentioned cooling assembly, wherein an insertion portion of the endoscope comprises a base, and a cooling tube is integrated in the insertion portion.

[0010] The beneficial technical effects of this application are as follows:

[0011] In the present application, the first spray portion on the cooling tube is provided with a first spray hole. Before removing the self-expanding stent, the cooling tube can be placed in the first position, and the first spray portion can be extended into the self-expanding stent, and then cooling water is injected into the cooling tube. The cooling water is sprayed out through the first spray hole, thereby cooling the self-expanding stent. The cooled self-expanding stent will produce radial contraction, thereby reducing the friction and adhesion between the self-expanding stent and the surrounding tissues, and then it is relatively easy to remove the self-expanding stent using a removal tool, thereby reducing the risk of damage to the fistula wall.

[0012] In addition, the present application provides a plurality of first spray holes, which are spaced apart along the circumference of the cooling tube. The cooling water sprayed from the first spray holes can act on the inner hole wall of the self-expanding stent from multiple directions, thereby being able to cool the self-expanding stent more evenly, reducing the friction and adhesion between the various parts of the self-expanding stent in its circumferential direction and the surrounding tissues, thereby further reducing the risk of damage to the fistula wall.

[0013] Furthermore, the closable portion can be switched between a closed state and an open state. In the closed state, the cooling water introduced into the cooling pipe will be sprayed out from the first spray hole, thereby providing a uniform cooling effect; in the open state, the cooling water introduced into the cooling pipe will be sprayed out from the first spray hole and the distal end of the cooling pipe, thereby providing a stronger cooling capacity for the local area that requires strong cooling. It can be seen that after adopting the structure of the present application, the state of the closable portion can be flexibly adjusted according to the actual temperature and cooling requirements of the fistula stent to put the cooling component in a suitable cooling mode, and the water outlet direction of the cooling pipe can be adjusted so that the water outlet direction of the cooling pipe is directed to different parts of the fistula stent, thereby cooling the fistula stent more optimally and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the endoscope disclosed in the embodiment of the present application;

[0015] Figure 2 For this application Figure 1 The enlarged schematic diagram of point A in the middle;

[0016] Figure 3 A cross-sectional view of a part of the structure of the endoscope when the closable portion disclosed in the embodiment of the present application is in an open state;

[0017] Figure 4 The schematic diagram of the partial structure of the cooling assembly is shown in the following figure when the cooling pipe disclosed in the embodiment of the present application is in the first position and the closable portion is in the closed state. Figure 1 ;

[0018] Figure 5It is a partial structural schematic diagram of a cooling assembly when the cooling pipe disclosed in another embodiment of the present application is in the first position and the closable portion is in a closed state;

[0019] Figure 6 The schematic diagram of the partial structure of the cooling assembly is shown in the following figure when the cooling pipe disclosed in the embodiment of the present application is in the first position and the closable portion is in the closed state. Figure 2 ;

[0020] Figure 7 It is a schematic diagram of the cooperation between the cooling assembly and the self-expanding stent when the cooling tube disclosed in the embodiment of the present application is in the first position and the closable portion is in the closed state;

[0021] Figure 8 This is a schematic diagram of the structure of the lasso rope disclosed in the embodiment of the present application;

[0022] Fig. 9 A schematic diagram of a portion of the structure of an endoscope disclosed in an embodiment of the present application;

[0023] Fig.10 For this application Fig. 9 A magnified schematic diagram of point B in the middle.

[0024] Description of reference numerals:

[0025] 100, base; 101, penetration hole; 102, penetration channel; 110, front end seat; 120, penetration tube; 200, cooling tube; 210, first spray part; 211, first spray hole; 220, closable part; 230, second spray part; 231, second spray hole; 300, loop; 301, first rope segment; 302, second rope segment; 310, loop; 320, operating part; 400, fixing sleeve; 500, operating handle; 510, handle housing; 520, first driving member; 530, second driving member; 540, third driving member; 610, stomach wall; 620, intrahepatic bile duct wall; 700, self-expanding stent. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0028] The cooling assembly and endoscope provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0029] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components relative to the user in the use environment, 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".

[0030] See also Figure 3 and Figure 4 The embodiment of the present application discloses a cooling assembly, which is applied to a medical device and can cool a self-expanding stent 700. The medical device here can be an endoscope or a snare device for removing unwanted objects from the human body. The cooling assembly includes a base 100 and a cooling tube 200. The cooling tube 200 is inserted through the base 100. The base 100 here is the base part of the cooling assembly, which can provide an installation space for the cooling tube 200 and can provide radial support for the cooling tube 200. It should be noted that when the medical device is an endoscope, the base 100 here can be the insertion part of the endoscope; when the medical device is a snare device, the base 100 here can be the catheter of the snare device, and the catheter can be inserted into the human body through the instrument channel of the insertion part of the endoscope.

[0031] The side wall of the cooling tube 200 includes a first spray portion 210, and the first spray portion 210 is provided with a plurality of first spray holes 211 distributed at intervals along the circumference of the cooling tube 200. Here, the first spray holes 211 penetrate the side wall of the cooling tube 200, thereby connecting the internal space and the external space of the cooling tube 200. In this way, after cooling water is introduced into the cooling tube 200, the cooling water can be sprayed from all sides of the cooling tube 200, thereby cooling the inner hole wall of the self-expanding stent 700. Optionally, the first spray holes 211 can be provided in one or more groups, and the plurality of groups of first spray holes 211 are distributed at intervals along the axial direction of the first spray portion 210, and each group of first spray holes 211 includes a plurality of first spray holes 211 distributed at intervals along the circumference of the cooling tube 200. In this way, the number of first spray holes 211 is provided more to enhance the cooling effect on the self-expanding stent 700.

[0032] The cooling tube 200 has a first position. When the cooling tube 200 is located at the first position, the first spray part 210 is located at the far side of the far end surface of the base 100, and the first spray part 210 can extend into the self-expanding stent 700. In other words, the outer dimensions of the first spray part 210 and the outer dimensions of the pipe section of the cooling tube 200 located at the far side of the first spray part 210 are smaller than the inner hole size of the self-expanding stent 700, so that the first spray part 210 can enter the self-expanding stent 700. For example, when the cross section of the first spray part 210 is circular, the outer diameter of the first spray part 210 is smaller than the inner hole diameter of the self-expanding stent 700. Of course, the cross section of the first spray part 210 may not be circular, but may be square, etc. The present application does not limit the shape of the first spray part 210.

[0033] The cooling tube 200 also includes a closable portion 220, which is located on the far side of the first spray portion 210. The closable portion 220 can switch between a closed state and an open state. When the closable portion 220 is in the closed state, the closable portion 220 is cut off, that is, the flow channel in the closable portion 220 is cut off. At this time, the proximal pipe mouth and the distal pipe mouth of the cooling tube 200 are not connected, and the proximal pipe mouth of the cooling tube 200 is connected to the first spray hole 211; when the closable portion 220 is in the open state, the closable portion 220 is turned on, that is, the flow channel in the closable portion 220 is turned on, and at this time, the proximal pipe mouth and the distal pipe mouth are connected, and the proximal pipe mouth of the cooling tube 200 is connected to the first spray hole 211.

[0034] In the present application, the first spray portion 210 on the cooling tube 200 is provided with a first spray hole 211. Before removing the self-expanding stent 700, the cooling tube 200 can be placed in the first position, and the first spray portion 210 can be extended into the self-expanding stent 700, and then cooling water is injected into the cooling tube 200. The cooling water is sprayed out through the first spray hole 211, thereby cooling the self-expanding stent 700. After cooling, the self-expanding stent 700 will produce radial contraction, thereby reducing the friction and adhesion between the self-expanding stent 700 and the surrounding tissues, and then it is relatively easy to remove the self-expanding stent 700 using a removal tool, thereby reducing the risk of damage to the fistula wall.

[0035] In addition, the present embodiment has a plurality of first spray holes 211, and the plurality of first spray holes 211 are spaced apart along the circumference of the cooling tube 200. The cooling water sprayed from the first spray holes 211 can act on the inner hole wall of the self-expanding stent 700 from multiple directions, thereby being able to cool the self-expanding stent 700 more evenly, reducing the friction and adhesion between the various circumferential parts of the self-expanding stent 700 and the surrounding tissues, thereby further reducing the risk of damage to the fistula wall.

[0036] Furthermore, the closable portion 220 can be switched between a closed state and an open state. In the closed state, the cooling water introduced into the cooling tube 200 will be sprayed out from the first spray hole 211, thereby providing a uniform cooling effect; in the open state, the cooling water introduced into the cooling tube 200 will be sprayed out from the first spray hole 211 and the distal end of the cooling tube 200, thereby providing a stronger cooling capacity. It can be seen that after adopting the structure of the present application, the state of the closable portion 220 can be flexibly adjusted according to the actual temperature and cooling requirements of the fistula stent to make the cooling component in a suitable cooling mode (a uniform cooling mode with slightly stronger cooling capacity and a uniform cooling mode with stronger cooling capacity), and the water outlet direction of the cooling tube 200 is adjusted so that the water outlet direction of the cooling tube 200 is directed to different parts of the fistula stent, thereby cooling the fistula stent more optimally and more accurately.

[0037] For example, when different cooling intensities are required at different locations of the fistula stent, such as at the distal end of the fistula stent ( Figure 7 When the temperature of the right end of the cooling tube 200 is higher than that of other parts of the fistula tract stent, the closable portion 220 can be switched to the open state, and the distal end of the cooling tube 200 can be located at the distal end of the fistula tract stent. At this time, cooling water can not only be sprayed from the first spray hole 211 to uniformly cool the inner hole wall of other parts of the fistula tract stent except the distal end, but cooling water can also be sprayed from the distal end of the cooling tube 200 to strongly cool the distal end of the fistula tract stent, thereby cooling the fistula tract stent better and more accurately.

[0038] In addition, the cooling tube 200 of the present application can also be used as an instrument tube in some scenarios, that is, the cooling tube 200 can be used to insert surgical instruments such as biopsy forceps. At this time, the cooling tube 200 can be placed in an open state to facilitate the passage of surgical instruments.

[0039] In an optional embodiment, the cooling pipe 200 may be always in the first position, that is, the cooling pipe 200 may be fixed on the base 100 and located in the first position. Figure 2 and Figure 3 In another optional embodiment, the cooling pipe 200 is slidably disposed in the base 100 so that the cooling pipe 200 can be switched between the first position and the second position; when the cooling pipe 200 is located at the second position, the first spray part 210 is located in the base 100.

[0040] In this embodiment, before the cooling component is inserted into the human body, the cooling tube 200 can be switched to the second position. At this time, the first spray part 210 is located inside the base 100, which can reduce the length of the portion of the cooling tube 200 extending out of the distal surface of the base 100, thereby facilitating the insertion of the cooling component into the human body and reducing the risk of the portion of the cooling tube 200 extending out of the distal surface of the base 100 damaging human tissue.

[0041] In a further embodiment, when the cooling tube 200 is located at the second position, the distal surface of the cooling tube 200 is located inside the base 100. At this time, there is no portion of the cooling tube 200 that exceeds the distal surface of the cooling tube 200, which makes it easier to insert the cooling assembly into the human body.

[0042] In some embodiments, the cooling component may also include a first conductive wire, and a deformation memory metal bracket is provided in the closable part 220, and the deformation memory metal bracket is electrically connected to the first conductive wire; when the deformation memory metal bracket is in a normal state, the deformation memory metal bracket shrinks and deforms, and the inner wall of the closable part 220 fits together to be in a closed state; when the deformation memory metal bracket is energized through the first conductive wire, the deformation memory metal bracket expands, and it no longer shrinks and deforms, and the inner wall of the closable part 220 no longer fits together, thereby being in an open state.

[0043] In some other embodiments, an extrusion member is movably provided in the base 100, and the movement here may be movement or rotation, and the extrusion member can move in a direction close to or away from the closable portion 220, and the cooling assembly further includes a fourth driving member, which is connected to the extrusion member and can drive the extrusion member to move, so that the extrusion member squeezes or releases the closable portion 220. When the extrusion member squeezes the closable portion 220, the closable portion 220 shrinks and deforms, and the inner walls of the closable portion 220 fit together to be in a closed state; when the extrusion member releases the closable portion 220, the closable portion 220 gradually expands, no longer shrinks and deforms, and the inner walls of the closable portion 220 no longer fit together, so that the closable portion 220 is in an open state. The fourth driving member here may be a traction rope, and the traction rope is used to drive the extrusion member to rotate.

[0044] To simplify the construction of the cooling assembly, see Figure 3 and Figure 4 In an optional embodiment, the closable portion 220 is elastic, that is, the closable portion 220 can undergo elastic deformation. Exemplarily, 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 is elastic. When the cooling tube 200 is in the first position, the closable portion 220 shrinks under the action of its own elasticity to be in a closed state. Specifically, when the closable portion 220 shrinks, the tube wall of the closable portion 220 collapses inward, so that the tube walls of the closable portion 220 fit together to cut off the flow channel in the closable portion 220, so that the closable portion 220 is in a closed state. It should be noted that the base 100 here is provided with a through hole 101, and the cooling tube 200 is slidably penetrated in the through hole 101. When the closable portion 220 shrinks, please refer to Figure 4 , the width of the closable portion 220 is greater than the diameter of the penetration hole 101 .

[0045] When the cooling tube 200 is located at the second position, the closable portion 220 is located in the base 100, and the base 100 squeezes the closable portion 220 so that the closable portion 220 expands and is in an open state, where the expansion is relative to the above-mentioned deflated state. Specifically, when the closable portion 220 gradually enters the through hole 101 in the base 100, the inner wall of the through hole 101 will squeeze the closable portion 220, thereby reducing the width of the closable portion 220, so that the closable portion 220 will expand radially in a direction perpendicular to the width direction, that is, the collapsed tube wall of the closable portion 220 will gradually expand outward, so that the tube walls of the closable portion 220 that are in contact with each other are gradually separated, so as to open the flow channel in the closable portion 220, so that the closable portion 220 is in an open state.

[0046] It can be seen that this embodiment utilizes the elasticity of the closable part 220 itself and the positional relationship between it and the base 100, so as to realize the switching of the closable part 220 between the open state and the closed state without the need to additionally set up other driving mechanisms (such as the first conductive wire or the extrusion part, the fourth driving part). This can simplify the structure of the cooling component, reduce the external dimensions of the cooling component, and make it easier to insert the cooling component into the human body.

[0047] See also Figure 3 In an optional embodiment, a penetration hole 101 is provided on the base 100, and the cooling pipe 200 is slidably penetrated in the penetration hole 101. When the cooling pipe 200 is located in the second position, all parts of the closable portion 220 in its circumferential direction are in contact with the inner wall of the penetration hole 101.

[0048] When the tube wall of the closable part 220 collapses inwards so that the tube wall of the closable part 220 fits together, the closable part 220 is in a closed state; when the closable part 220 switches from the closed state to the open state, the closable part 220 gradually expands under the pressure of the base 100, so that the tube wall of the closable part 220 no longer fits together, but opens a hole. When the closable part 220 of this embodiment is in an open state, all parts of the closable part 220 in its own circumferential direction fit with the inner wall of the perforated hole 101, which can make the opening of the closable part 220 larger, and when the cooling tube 200 is used as an instrument tube, it is convenient to pass larger-sized instruments. Of course, when the cooling tube 200 is located in the second position, a part of the closable part 220 in its own circumferential direction fits with the inner wall of the perforated hole 101, and another part may not fit with the inner wall of the perforated hole 101.

[0049] To further enhance the cooling effect on the self-expanding stent 700, please refer to Figure 5 In an optional embodiment, the cooling pipe 200 further includes a second spray portion 230 , which is located proximal to the first spray portion 210 , and is provided with a plurality of second spray holes 231 spaced apart along the circumference of the cooling pipe 200 .

[0050] When the cooling pipe 200 is located at the first position, the second spray part 230 is located at the far side of the far end surface of the base 100 , and the second spray part 230 can be in the first state.

[0051] When the cooling tube 200 is in the first position and the second spray portion 230 is in the first state, the second spray portion 230 radially protrudes outward from the first spray portion 210, that is, along the direction extending from the inside of the second spray portion 230 to the outside, the second spray portion 230 exceeds the first spray portion 210, and the second spray hole 231 on the second spray portion 230 can correspond to the end face of the self-expanding stent 700, that is, the second spray hole 231 and the end face of the self-expanding stent 700 are arranged opposite to each other in the axial direction of the self-expanding stent 700, and the second spray hole 231 is located on the proximal side of the fistula stent, and the end face here is the proximal end face of the self-expanding stent 700, that is, Figure 7 It should be noted that Figure 7 The self-expanding stent 700 in the embodiment penetrates the stomach wall 610 and the intrahepatic bile duct wall 620.

[0052] Specifically, the second spray holes 231 can be arranged in the part of the second spray portion 230 that radially protrudes outward from the first spray portion 210. The second spray holes 231 can be arranged in one group or at least two groups. At least two groups of second spray holes 231 are spaced apart along the direction extending from the inside to the outside of the second spray portion 230. Each group of second spray holes 231 includes a plurality of second spray holes 231 spaced apart along the circumferential direction of the cooling pipe 200.

[0053] In this embodiment, when the first spray part 210 extends into the self-expanding stent 700, the second spray part 230 is located at the proximal side of the self-expanding stent 700. At this time, the second spray part 230 can be in the first state, and the second spray hole 231 is opposite to the proximal surface of the self-expanding stent 700, so that the cooling water sprayed from the second spray hole 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 adopting the structure of this embodiment, the cooling tube 200 can not only cool the inner hole wall of the self-expanding stent 700, but also cool the proximal surface of the self-expanding stent 700, which can enhance the cooling effect of the self-expanding stent 700, so as to further reduce the friction and adhesion between the various parts of the self-expanding stent 700 in the circumferential direction and the surrounding tissues, thereby further reducing the risk of fistula wall damage.

[0054] Please continue reading Figure 5In an optional embodiment, when the cooling tube 200 is located at the first position and the second spray part 230 is in the first state, the second spray part 230 is in a balloon shape, and all parts of the second spray part 230 in its own circumferential direction are radially protruding from the first spray part 210, so that the second spray holes 231 can be distributed within a range of 360 degrees, so that the second spray holes 231 correspond to each part of the end face of the self-expanding stent 700 in its own circumferential direction, so as to more evenly cool the end face of the self-expanding stent 700. Of course, the second spray part 230 may not be in a balloon shape, but may be in a tubular shape. In this case, the second spray part 230 is located on one side of the first spray part 210. In this case, the pipe section of the cooling tube 200 located near the second spray part 230 is not coaxial with the first spray part 210.

[0055] It should be noted that, when this embodiment is combined with the embodiment in which “the cooling pipe 200 can be fixed on the base 100 and located at the first position”, the second spray part 230 can always be in the first state.

[0056] In some embodiments, the cooling assembly may further include a second conductive wire, a deformation memory alloy bracket is provided in the second spray portion 230, and the deformation memory alloy bracket is electrically connected to the second conductive wire; when the deformation memory alloy bracket is in a normal state, the second spray portion 230 is in a second state, and the second spray portion 230 is radially convex or flush with the first spray portion 210; when the deformation memory alloy bracket is energized through the second conductive wire, the deformation memory alloy bracket expands radially, thereby being in the first state, and the second spray portion 230 is radially convex than the first spray portion 210.

[0057] In other embodiments, the second spray part 230 is an elastic deformable body, and the cooling assembly further includes a traction member, the distal end of the traction member is connected to the distal end of the elastic deformable body, and the elastic deformable body is in the second state in a natural state; when the proximal end of the traction member is pulled, the traction member drives the distal end of the elastic deformable body to move toward the proximal end, so that the elastic deformable body undergoes elastic deformation, and the elastic deformable body is in the first state. The traction member here can be a traction rope, a transmission rod with a certain elastic deformation ability and capable of transmitting thrust, such as a slender rod of plastic or metal, a steel wire, etc.

[0058] In some other embodiments, the second spray portion 230 is a flexible deformer, and the cooling assembly also includes a transmission rod connected to the distal end of the flexible deformer. The transmission rod can move relative to the cooling tube 200 to switch the flexible deformer between the first state and the second state.

[0059] In order to simplify the structure of the cooling assembly, in an optional embodiment, the second spray portion 230 is elastic, that is, the second spray portion 230 can undergo elastic deformation. Exemplarily, the second spray portion 230 may be made of an elastic material; or an elastic bracket may be provided in the second spray portion 230 so that the second spray portion 230 is elastic. When the cooling pipe 200 is in the first position and the second spray portion 230 is in a natural state, the second spray portion 230 is in the first state; the cooling pipe 200 is slidably penetrated through the base 100 so that the cooling pipe 200 switches between the first position and the second position. When the cooling pipe 200 is in the second position, the second spray portion 230 is located in the base 100, and the base 100 squeezes the second spray portion 230 so that the second spray portion 230 radially convexly inwardly protrudes from or is flush with the first spray portion 210, and is in the second state.

[0060] Specifically, the base 100 is provided with a perforation hole 101, and the cooling pipe 200 is slidably perforated in the perforation hole 101. When the cooling pipe 200 is located at the first position and the second spray part 230 is in the first state, the second spray part 230 is located at the far side of the far end surface of the base 100, and the outer diameter of the second spray part 230 is greater than the diameter of the perforation hole 101. When the second spray part 230 gradually enters the perforation hole 101 in the base 100, the inner wall of the perforation hole 101 squeezes the second spray part 230, thereby reducing the outer diameter of the second spray part 230, causing the second spray part 230 to shrink radially, so that the second spray part 230 is radially convex or flush with the first spray part 210. It should be noted that when the inner wall of the hole 101 is relatively flat, the second spray portion 230 will be flush with the first spray portion 210; when there is a protrusion structure on the inner wall of the hole 101, the protrusion structure will squeeze the second spray portion 230, so that the second spray portion 230 protrudes radially inward from the first spray portion 210.

[0061] It can be seen that the present embodiment utilizes the elasticity of the second spray part 230 itself to coordinate with the positional relationship between the second spray part 230 and the base 100, thereby realizing the switching of the second spray part 230 between the first state and the second state without the need to additionally set up other driving mechanisms (such as a second conductive wire). This can simplify the structure of the cooling component, reduce the external dimensions of the cooling component, and make it easier to insert the cooling component into the human body.

[0062] See also Figures 3 to 8In an optional embodiment, the cooling assembly further comprises a sleeve rope 300, a penetration channel 102 is provided on the base 100, the penetration channel 102 is arranged at intervals with the cooling tube 200, the sleeve rope 300 comprises a connected ring 310 and an operating part 320, the ring 310 is arranged at the distal end of the operating part 320, the operating part 320 is movably penetrated in the penetration channel 102, and the operating part 320 can move relative to the penetration channel 102, so that the ring 310 is located at the distal side of the distal end surface of the base 100, and the self-expandable stent 700 is sleeved. Optionally, a penetration tube 120 can be provided on the base 100, the penetration tube 120 is penetrated in the base 100, and the penetration channel 102 is formed in the penetration tube 120.

[0063] In the present application, the loop rope 300 is inserted into the insertion channel 102, and the loop rope 300 includes a connected operating part 320 and a ring 310. The operating part 320 is movably inserted into the insertion channel 102. By controlling the operating part 320 to move relative to the insertion channel 102, the ring 310 can be moved to the distal side of the distal end surface of the front end shell and separated from the distal end surface of the front end shell. In this way, the self-expanding stent 700 can be tightly wrapped around the base 100 using the ring 310 to facilitate the removal of the self-expanding stent 700.

[0064] See also Figure 6 and Figure 8 In a further embodiment, when the collar 310 is located on the far side of the distal end surface of the base 100, the collar 310 is bent relative to the operating portion 320 so that the space inside the collar 310 faces the cooling pipe 200, and the bending angle between the collar 310 and the operating portion 320 is ninety degrees.

[0065] In this embodiment, when the collar 310 is located at the far side of the far end surface of the base 100, the collar 310 is bent relative to the operating portion 320 so that the space in the collar 310 faces the cooling pipe 200, so that the cooling pipe 200 can be extended into the collar 310. In this way, the collar 310 can be used to slightly bend the cooling pipe 200 (such as Figure 6 The state shown in the figure) is used to change the orientation of the distal end of the cooling tube 200, so that the cooling tube 200 can enter the inclined expandable stent. In addition, the bending angle between the collar 310 and the operating portion 320 of this embodiment is ninety degrees. In this way, 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 make the collar 310 and the cooling tube 200 have a greater friction force to reduce the risk of the collar 310 slipping relative to the cooling tube 200, thereby stably bending the cooling tube 200. Of course, the bending angle between the collar 310 and the operating portion 320 can also be greater than or less than ninety degrees, and this application is not limited to this.

[0066] In a further embodiment, the lasso rope 300 is made of a memory alloy, and when the lasso rope 300 is sprayed with cooling water, the lasso rope 300 is tightened to bend the cooling tube 200 .

[0067] See also Figure 8 In an optional embodiment, the looping rope 300 includes a first rope segment 301 and a second rope segment 302 arranged in parallel, the distal end of the first rope segment 301 and the distal end of the second rope segment 302 are connected, and the distal end of the first rope segment 301 and the distal end of the second rope segment 302 are bent in directions away from each other to form a loop 310. In this case, the portion of the first rope segment 301 other than the loop 310 and the portion of the second rope segment 302 other than the loop 310 jointly form an operating portion 320. When the first rope segment 301 and the second rope segment 302 move synchronously along the direction extending from the proximal end to the distal end of the base 100, the loop 310 can be located on the distal side of the distal end surface of the base 100; when the first rope segment 301 moves relative to the second rope segment 302, the cross-sectional area of ​​the looping space formed in the loop 310 changes.

[0068] In a further embodiment, the cooling assembly also includes a fixed sleeve 400, which is slidably disposed in the penetration channel 102. The fixed sleeve 400 is provided with a through hole that penetrates the fixed sleeve 400 along its own axis. The first rope segment 301 is penetrated in the through hole, and the second rope segment 302 is fixedly connected to the fixed sleeve 400. When the ring 310 is located on the distal side of the distal end surface of the front end shell, a part of the fixed sleeve 400 extends out of the penetration channel 102. In this way, the fixed sleeve 400 can be used to constrain the part of the loop rope 300 located between the ring 310 and the distal end opening of the penetration channel 102, thereby preventing the part from bending and deforming to ensure that the ring 310 is in a preset position.

[0069] See also Figure 1 , Fig. 9 and Fig.10 , the embodiment of the present application also discloses an endoscope, including the cooling assembly described in any of the above embodiments, the insertion portion of the endoscope includes a base 100, and the cooling tube 200 is integrated in the insertion portion. Since the endoscope of this embodiment includes the above cooling assembly, the endoscope has the beneficial effects of the above cooling assembly, which will not be repeated here. The endoscope referred to in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of endoscope.

[0070] The cooling component of the present application is integrated on the endoscope. When using the endoscope of the embodiment of the present application to remove the target object in the human body, it is only necessary to insert the endoscope into the human body for cooling operation, without inserting the snare device integrated with the cooling component into the endoscope. This can simplify the process of cooling the expandable stent.

[0071] In an optional embodiment, the insertion part includes a front seat 110 and an instrument tube, an instrument channel is provided in the instrument tube, the base 100 is the front seat 110, and the cooling tube 200 is the instrument tube (not shown in the figure). In this embodiment, the instrument tube is used as the cooling tube 200, so that the purpose of one object for multiple uses can be achieved, and there is no need to arrange two parallel pipes (instrument tube and cooling tube 200) in the insertion part, thereby achieving the purpose of reducing the diameter of the insertion part, which is conducive to the miniaturization design of the insertion part.

[0072] See also Fig. 9 and Fig.10 In an optional embodiment, the endoscope further comprises an operating handle 500, the distal end of the operating handle 500 is connected to the proximal end of the insertion part, the operating handle 500 comprises 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 can all move relative to the handle housing 510, the first driving member 520 is connected to the first rope segment 301, the second driving member 530 is connected to the second rope segment 302, the operating part 320 can be moved relative to the base 100 by driving the first driving member 520 and the second driving member 530 to move, and the sleeve area of ​​the collar 310 can be adjusted by driving the first driving member 520 or the second driving member 530 to move alone. The cooling tube 200 is connected to the third driving member 540, and the cooling tube 200 can be driven to slide between the first position and the second position by the third driving member 540.

[0073] The above embodiments of the present application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. A cooling assembly, applied to a medical device and capable of cooling a self-expanding stent (700), characterized in that: The cooling assembly comprises a base (100) and a cooling pipe (200), the cooling pipe (200) being arranged through the base (100), the side wall of the cooling pipe (200) comprising a first spray portion (210), the first spray portion (210) being provided with a plurality of first spray holes (211) distributed at intervals along the circumference of the cooling pipe (200); The cooling tube (200) has a first position, and when the cooling tube (200) is located at the first position, the first spray portion (210) is located at the far side of the far end surface of the base (100), and the first spray portion (210) can extend into the self-expanding stent (700); The cooling pipe (200) further comprises a closable portion (220), the closable portion (220) being located at the far side of the first spray portion (210), the closable portion (220) being switchable between a closed state and an open state, and when the closable portion (220) is in the closed state, the closable portion (220) is cut off; when the closable portion (220) is in the open state, the closable portion (220) is turned on; The cooling pipe (200) is slidably disposed through the base (100) so that the cooling pipe (200) can be switched between a first position and a second position; When the cooling pipe (200) is located at the second position, the first spraying portion (210) is located inside the base (100); The closable portion (220) is elastic, and when the cooling tube (200) is located at the first position, the closable portion (220) shrinks due to its own elasticity to be in the closed state; when the cooling tube (200) is located at the second position, the closable portion (220) is located in the base (100), and the base (100) squeezes the closable portion (220) to expand the closable portion (220) and be in the open state.

2. The cooling assembly according to claim 1, characterized in that The base (100) is provided with a penetration hole (101), and the cooling pipe (200) is slidably penetrated in the penetration hole (101). When the cooling pipe (200) is located at the second position, all parts of the closable portion (220) in its circumferential direction are in contact with the inner wall of the penetration hole (101).

3. The cooling assembly according to claim 1 or 2, characterized in that: The cooling pipe (200) further comprises a second spray portion (230), the second spray portion (230) being located near the first spray portion (210), the second spray portion (230) being provided with a plurality of second spray holes (231) distributed at intervals along the circumference of the cooling pipe (200); When the cooling pipe (200) is located at the first position, the second spray portion (230) is located at the far side of the far end surface of the base (100), and the second spray portion (230) can be in a first state; When the cooling tube (200) is located at the first position and the second spray portion (230) is in the first state, the second spray portion (230) radially protrudes outward from the first spray portion (210), and the second spray hole (231) on the second spray portion (230) can correspond to the end face of the self-expanding stent (700).

4. The cooling assembly according to claim 3, characterized in that: When the cooling pipe (200) is located at the first position and the second spray portion (230) is in the first state, the second spray portion (230) is in a spherical shape, and all parts of the second spray portion (230) in its own circumferential direction are radially protruding outward from the first spray portion (210).

5. The cooling assembly according to claim 4, characterized in that The second spray part (230) is elastic, and when the cooling pipe (200) is located at the first position and the second spray part (230) is in a natural state, the second spray part (230) is in the first state; The cooling tube (200) is slidably inserted into the base (100) so that the cooling tube (200) can be switched between a first position and a second position. When the cooling tube (200) is located at the second position, the second spray portion (230) is located inside the base (100). The base (100) squeezes the second spray portion (230) so that the second spray portion (230) is radially convex inwardly to or flush with the first spray portion (210) and is in a second state.

6. The cooling assembly according to claim 1, characterized in that The cooling assembly further comprises a sleeve rope (300), the base (100) is provided with a penetration channel (102), the sleeve rope (300) comprises a sleeve ring (310) and an operating part (320) connected to each other, the sleeve ring (310) is provided at the distal end of the operating part (320), the operating part (320) is movably penetrated in the penetration channel (102), and the operating part (320) can move relative to the penetration channel (102) so that the sleeve ring (310) is located at the distal side of the distal end surface of the base (100) and sleeves the self-expanding stent (700); When the collar (310) is located on the far side of the distal end surface of the base (100), the collar (310) is bent relative to the operating portion (320) so that the space inside the collar (310) faces the cooling pipe (200), and the bending angle between the collar (310) and the operating portion (320) is ninety degrees.

7. An endoscope, characterized in that: Comprising the cooling assembly according to any one of claims 1 to 6, the insertion portion of the endoscope comprises the base (100), and the cooling tube (200) is integrated in the insertion portion.

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

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