Endoscope, cooling assembly and method of use thereof

Abstract

The present application belongs to the field of medical device technology, and specifically relates to an endoscope, a cooling assembly and a method of using the same. The cooling assembly is applied to medical devices and can cool a self-expanding stent, including a base and a cooling tube, the cooling tube is passed 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 along the circumference of the cooling tube, and the cooling tube has a first state; when the cooling tube is in the first state, the distal end of the cooling tube is in a closed state, the first spray portion is located on the distal side of the distal end surface of the base and on the proximal side of the closure of the cooling tube, and the first spray portion can extend into the self-expanding stent. The present application can help remove the self-expanding stent from the fistula, and help 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 field of medical device technology, and specifically relates to an endoscope, a cooling component and a method of using the same. 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 an endoscope, a cooling assembly and a method of using the same, which 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, comprising a base and a cooling tube, wherein the cooling tube is arranged through the base, and the side wall of the cooling tube comprises a first spray portion, wherein the first spray portion is provided with a plurality of first spray holes spaced apart along the circumference of the cooling tube, and the cooling tube has a first state;

[0007] When the cooling tube is in the first state, the distal end of the cooling tube is in a closed state, the first spray portion is located distal to the distal end surface of the base and proximal to the closed portion of the cooling tube, and the first spray portion can extend into the self-expanding stent.

[0008] In an optional embodiment, the cooling pipe further includes a second spray portion, the second spray portion is connected to the distal end of the first spray portion, and the second spray portion is provided with a plurality of second spray holes spaced apart along the circumference of the cooling pipe;

[0009] The second spray portion can switch between a contracted state and an expanded state. When the second spray portion is in the contracted state, the maximum radial dimension of the second spray portion is smaller than a preset value so that the second spray portion can enter the self-expanding stent. When the second spray portion is in the expanded state, the second spray portion is located on the far side of the first spray portion, and the maximum radial dimension of the second spray portion is larger than a preset value so that the second spray hole corresponds to the end face of the self-expanding stent.

[0010] In an optional embodiment, when the second spray portion is in an expanded state, the outer peripheral contour of the second spray portion is annular, and the radial dimensions of all parts of the second spray portion along its own circumference are greater than a preset value; and / or,

[0011] When the second spray portion is in the expanded state, the cross-sectional area of ​​the inner cavity of the second spray portion gradually decreases along the direction extending from the proximal end to the distal end of the second spray portion.

[0012] In an optional embodiment, the second spraying portion includes a water outlet portion and a blocking portion, and the plurality of second spraying holes are all provided in the water outlet portion;

[0013] When the second spray part is in the expanded state, the water outlet is annular, the sealing part is spherical, a spherical cavity is provided inside the sealing part, the outer edge of the water outlet protrudes radially outward from the first spray part along all parts of its circumference, and the sealing part is located on the far side of the water outlet and is connected to the water outlet.

[0014] In an optional embodiment, when the second spray part is in the contracted state, the second spray part is in a folded state, and the folded second spray part is sleeved with the first spray part;

[0015] When a fluid with a preset pressure is passed into the cooling tube, the distal end of the cooling tube can be kept in a closed state, and the second spray part can be switched from a contracted state to an expanded state.

[0016] In an optional embodiment, when the second spray portion is in a contracted state, the folded second spray portion covers at least a portion of the first spray hole.

[0017] In an optional embodiment, the folded second spray portion is sleeved inside the first spray portion.

[0018] In an optional embodiment, the cooling pipe is slidably disposed in the base so that the first spray part is located at the far side of the far end surface of the base, or the first spray part is located in the base.

[0019] In a second aspect, the present application provides a method for using a cooling assembly, which is applied to the above cooling assembly, comprising:

[0020] Controlling the cooling tube to slide relative to the base so that the first spraying part is located at the far side of the far end surface of the base;

[0021] Controlling the first spraying part to penetrate into the self-expanding stent;

[0022] Cooling water of preset pressure is introduced into the cooling pipe to switch the second spray part from a contracted state to an expanded state, and the first spray hole and the second spray hole are used to cool the self-expanding stent.

[0023] In a third 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.

[0024] The beneficial technical effects of this application are as follows:

[0025] 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 a first state, and the first spray portion is 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.

[0026] In addition, the present embodiment has a plurality of first spray holes, and the plurality of first spray holes 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the endoscope disclosed in the embodiment of the present application;

[0028] Figure 2 For this application Figure 1 The enlarged schematic diagram of point A in the middle;

[0029] Figure 3 A cross-sectional view of a portion of the structure of the cooling assembly when the first spray part is located inside the endoscope is disclosed in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of a partial structure of a cooling assembly when the first spray part is located outside the endoscope is disclosed in an embodiment of the present application;

[0031] Figure 5The embodiment of the present application discloses a cross-sectional view of a portion of the structure of the cooling assembly when the first spray part is located outside the endoscope. Figure 1 ;

[0032] Figure 6 For this application Figure 5 The enlarged schematic diagram of point B in the middle;

[0033] Figure 7 The embodiment of the present application discloses a schematic diagram of the cooperation between the cooling assembly and the self-expanding stent when the first spray part is located outside the endoscope. Figure 1 ;

[0034] Figure 8 The embodiment of the present application discloses a schematic diagram of the cooperation between the cooling assembly and the self-expanding stent when the first spray part is located outside the endoscope. Figure 2 ;

[0035] Fig. 9 The embodiment of the present application discloses a cross-sectional view of a portion of the structure of the cooling assembly when the first spray part is located outside the endoscope. Figure 2 ;

[0036] Fig.10 A schematic diagram of a portion of the structure of an endoscope disclosed in an embodiment of the present application;

[0037] Fig.11 For this application Fig.10 The enlarged schematic diagram of the center C;

[0038] Fig.12 This is a schematic diagram of the structure of the lasso rope disclosed in the embodiment of the present application.

[0039] Description of reference numerals:

[0040] 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, second spray part; 221, second spray hole; 222, water outlet; 223, blocking part; 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

[0041] 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.

[0042] 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.

[0043] The endoscope, cooling assembly and method of use 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.

[0044] 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".

[0045] like Figures 2 to 9 As shown, 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.

[0046] 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.

[0047] The cooling tube 200 has a first state. When the cooling tube 200 is in the first state, the distal end of the cooling tube 200 is in a closed state, and the first spray portion 210 is located on the distal side of the distal end surface of the base 100 and on the proximal side of the closed portion of the cooling tube 200. In this way, the cooling water introduced into the cooling tube 200 will not be depressurized from the distal end of the cooling tube 200, thereby ensuring the water pressure of the cooling water sprayed from the first spray hole 211, and the first spray portion 210 can be extended into the self-expanding stent 700. In other words, the outer dimensions of the first spray portion 210 and the outer dimensions of the pipe section of the cooling tube 200 located on the distal side of the first spray portion 210 can be smaller than the inner hole size of the self-expanding stent 700, thereby allowing the first spray portion 210 to enter the self-expanding stent 700. For example, when the cross-section of the first spray portion 210 is circular, the outer diameter of the first spray portion 210 is smaller than the inner hole diameter of the self-expanding stent 700. Of course, the cross-section of the first spray portion 210 may not be circular, but may be square, etc. The present application does not limit the shape of the first spray portion 210.

[0048] 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 a first state, 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.

[0049] 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.

[0050] In some embodiments, the distal end of the cooling tube 200 may only be in a closed state, that is, the distal end of the cooling tube 200 may be a closed end, which cannot be turned on. Alternatively, the distal end of the cooling tube 200 may also switch between a closed state and an open state, and when the distal end of the cooling tube 200 is in an open state, the distal end of the cooling tube 200 is turned on. A deformation memory metal bracket may be provided at the distal end of the cooling tube 200, and the deformation memory metal bracket may be controlled to expand or contract by a first conductive line, so that the inner wall of the distal end of the cooling tube 200 does not fit or fits, so as to switch between the open state and the closed state.

[0051] To further enhance the cooling effect on the self-expanding stent 700, please refer to Figures 7 to 9 In an optional embodiment, the cooling pipe 200 also includes a second spray portion 220, which is connected to the distal end of the first spray portion 210. The second spray portion 220 and the distal end of the first spray portion 210 can be directly connected or indirectly connected. In the case of indirect connection, a connecting pipe section of the cooling pipe 200 is also provided between the second spray portion 220 and the distal end of the first spray portion 210, and the distal end of the first spray portion 210 is directly connected to the connecting pipe section. The second spray portion 220 is provided with a plurality of second spray holes 221 distributed at intervals along the circumference of the cooling pipe 200.

[0052] The second spray part 220 can switch between a contracted state and an expanded state, that is, the second spray part 220 is deformable, and the contraction and expansion here are relative. When the second spray part 220 is in a contracted state, the radial maximum dimension of the second spray part 220 is less than the preset value, so that the second spray part 220 can enter the self-expanding stent 700. It should be noted that the radial maximum dimension of the second spray part 220 refers to the dimension of the outermost edge of the second spray part 220 along the radial direction of the cooling pipe 200. For example, when this embodiment is combined with the embodiment of "the second spray part 220 includes a water outlet 222 and a blocking part 223", the radial maximum dimension of the second spray part 220 is the diameter of the water outlet 222. The preset value here can be the inner diameter of the self-expanding stent 700. In general, the radial maximum dimension of the second spray part 220 can be sufficient as long as it can enable the second spray part 220 to enter the self-expanding stent 700.

[0053] When the second spray portion 220 is in the expanded state, the second spray portion 220 is located at the distal side of the first spray portion 210, and the radial maximum dimension of the second spray portion 220 is greater than a preset value, so that the second spray hole 221 corresponds to the end surface of the self-expanding stent 700, that is, the second spray portion 220 is aligned with the distal end surface ( Figure 7 , Figure 8 The right end surface in the middle) is arranged relatively in the axial direction of the cooling pipe 200. It should be noted that, Figure 7 The self-expanding stent 700 in FIG. 7 penetrates the stomach wall 610 and the intrahepatic bile duct wall 620 .

[0054] The specific working process of this embodiment is as follows: when the self-expanding stent 700 needs to be cooled, the second spray part 220 can be firstly put into a contracted state, so that the distal end of the cooling tube 200 is inserted into the self-expanding stent 700 until the first spray part 210 is located in the self-expanding stent 700; then the second spray part 220 is switched to an expanded state, at which time the second spray part 220 is located at the distal side of the self-expanding stent 700, and the second spray hole 221 corresponds to the distal end surface of the self-expanding stent 700, and at this time, the second spray part 220 is extended to the distal side of the self-expanding stent 700. Cooling water is passed through the cooling tube 200, and the cooling water can be sprayed out not only from the first spray hole 211, but also from the second spray hole 221. In this way, the cooling water can cool down the inner hole wall of the self-expanding stent 700 while also cooling the distal 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 its own circumferential direction and the surrounding tissues, thereby further reducing the risk of damage to the fistula wall.

[0055] In addition, when the second spray portion 220 is in the expanded state, it is arranged opposite to the distal surface of the self-expanding stent 700. Therefore, the second spray portion 220 and the self-expanding stent 700 are matched with the upper limit in the direction extending from the distal end to the proximal end of the cooling tube 200. In this way, when the cooling tube 200 is pulled, the cooling tube 200 can apply a force on the self-expanding stent 700 in the direction extending from the distal end to the proximal end of the cooling tube 200 through its own second spray portion 220, thereby assisting the removal tool to remove the self-expanding stent 700 from the fistula, which can reduce the difficulty of the removal tool in removing the self-expanding stent 700.

[0056] Optionally, the number of the second spray holes 221 may be multiple groups, the multiple groups of second spray holes 221 are distributed at intervals along the radial direction of the cooling pipe 200 , and each group of second spray holes 221 includes multiple second spray holes 221 distributed at intervals along the circumferential direction of the cooling pipe 200 .

[0057] 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 220, and the deformation memory alloy bracket is electrically connected to the second conductive wire; when the deformation memory alloy bracket is in normal state, the second spray portion 220 is in the above-mentioned contracted state; when the deformation memory alloy bracket is energized through the second conductive wire, the deformation memory alloy bracket expands radially, thereby placing the second spray portion 220 in the above-mentioned expanded state.

[0058] In other embodiments, the second spray part 220 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 a contracted 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 radial expansion deformation, and the elastic deformable body is in an extended state, and the elastic deformable body can recover from the extended state to the contracted state through its own deformation. The traction member here can be a traction rope, a transmission rod with a certain elastic deformation ability, such as a slender rod of plastic or metal, a steel wire, etc.

[0059] In some other embodiments, the second spray portion 220 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 a contracted state and an expanded state.

[0060] In an optional embodiment, when the second spray portion 220 is in an expanded state, the outer circumference of the second spray portion 220 is annular, and the radial dimensions of all parts of the second spray portion 220 along its own circumference are greater than a preset value, so that the second spray holes 221 can be distributed within a range of 360 degrees, so that the second spray holes 221 correspond to each part of the end surface of the self-expanding stent 700 on its own circumference, so as to more evenly cool the end surface of the self-expanding stent 700. Of course, the outer circumference of the second spray portion 220 may not be annular, but may be arc-shaped.

[0061] and / or, see Fig. 9 In an optional embodiment, when the second spray portion 220 is in an expanded state, the cross-sectional area of ​​the inner cavity of the second spray portion 220 gradually decreases along a direction extending from the proximal end to the distal end of the second spray portion 220.

[0062] Compared to the embodiment in which "the cross-sectional area of ​​the inner cavity of the second spray portion 220 remains unchanged along the direction extending from the proximal end to the distal end of the second spray portion 220", the volume of the inner cavity of the second spray portion 220 of the present embodiment is smaller. Under the condition that the flow rate of cooling water remains unchanged, the cooling water can quickly fill the inner cavity of the second spray portion 220 so as to be sprayed out from the second spray portion 220 faster, thereby preventing the end face of the self-expanding stent 700 from starting to cool down when the temperature of the inner hole wall of the self-expanding stent 700 has dropped to a relatively low level, i.e., preventing the temperature difference between the inner hole wall and the end face of the self-expanding stent 700 from being too large, thereby improving the uniformity of cooling the self-expanding stent 700.

[0063] Please continue reading Fig. 9 In an optional embodiment, the second spray part 220 includes a water outlet 222 and a plugging part 223, and a plurality of second spray holes 221 are all provided in the water outlet 222. When the second spray part 220 is in an expanded state, the water outlet 222 is annular, the plugging part 223 is spherical, and the plugging part 223 has a spherical cavity inside. The outer edge of the water outlet 222 along all parts of its own circumference radially protrudes outward from the first spray part 210, and the plugging part 223 is located at the far side of the water outlet 222 and connected to the water outlet 222. Specifically, the spherical cavity of the plugging part 223 here opens toward the water outlet 222, and the water outlet 222 and the spherical cavity cooperate to form the inner cavity of the second spray part 220.

[0064] In the present embodiment, the cross-sectional area of ​​the inner cavity of the second spray portion 220 gradually decreases along the direction extending from the proximal end to the distal end of the second spray portion 220, which can make the volume of the inner cavity of the second spray portion 220 smaller. Under the condition that the flow rate of cooling water remains unchanged, the cooling water can quickly fill the inner cavity of the second spray portion 220 so as to be sprayed out from the second spray portion 220 more quickly, thereby preventing the end face of the self-expanding stent 700 from starting to cool down when the temperature of the inner hole wall of the self-expanding stent 700 has dropped to a relatively low level, that is, preventing the temperature difference between the inner hole wall and the end face of the self-expanding stent 700 from being too large, thereby improving the uniformity of cooling the self-expanding stent 700.

[0065] See also Figure 6 In an optional embodiment, when the second spraying portion 220 is in a contracted state ( Figures 3 to 6 In the state shown, the second spray part 220 is in a folded state, and the folded second spray part 220 is sleeved with the first spray part 210. When the cooling tube 200 is fed with a fluid of a preset pressure, the distal end of the cooling tube 200 can remain in a closed state, and the second spray part 220 can switch from a contracted state to an expanded state ( Figures 7 to 9 status shown).

[0066] The specific working process of this embodiment is as follows: a fluid of preset pressure is introduced into the proximal end of the cooling tube 200, and the fluid will flow to the distal end of the cooling tube 200. Since the distal end of the cooling tube 200 is in a closed state, the cooling water will act on the distal end of the cooling tube 200 and exert pressure thereon, thereby exerting a force on the second spray part 220, so that the second spray part 220 is disengaged from the sleeve of the first spray part 210 and is located at the distal side of the first spray part 210, and the second spray part 220 is switched to the extended state. It can be seen that in this embodiment, the second spray part 220 can be switched from the contracted state to the extended state by introducing a fluid of preset pressure into the cooling tube 200, so that there is no need to set up other additional driving mechanisms (such as a second conductive wire, a traction wire, and a transmission rod), which can simplify the structure of the cooling component.

[0067] Please continue reading Figure 6 In an optional embodiment, when the second spray portion 220 is in a contracted state, the folded second spray portion 220 covers at least a portion of the first spray hole 211 .

[0068] If the folded second spray part 220 does not cover the first spray hole 211, when cooling water is introduced into the cooling pipe 200 to disengage the second spray part 220 from the first spray part 210, the cooling water will release pressure from the first spray hole 211, which will reduce the force exerted by the cooling water on the second spray part 220 and weaken the effect of disengaging the second spray part 220 from the first spray part 210. In this embodiment, the folded second spray part 220 is used to cover the first spray hole 211, which can reduce the pressure of cooling water leaking from the first spray hole 211 and even avoid the pressure release of cooling water from the first spray hole 211, thereby solving the problem of weakening the effect of disengaging the second spray part 220 from the first spray part 210. Of course, the folded second spray part 220 may not cover the first spray hole 211, and this application is not limited to this.

[0069] Please continue reading Figure 6 In an optional embodiment, the folded second spray part 220 is sleeved inside the first spray part 210, which can prevent the second spray part 220 from occupying the external space of the first spray part 210, thereby reducing the diameter of the cooling tube 200, which is convenient for inserting the cooling tube 200 into the human body. Of course, the folded second spray part 220 can also be sleeved outside the first spray part 210, and this application is not limited to this.

[0070] See also Figures 2 to 4In an optional embodiment, the cooling tube 200 is slidably installed in the base 100 so that the first spray part 210 is located at the far side of the far end surface of the base 100, or the first spray part 210 is located in the base 100. Exemplarily, a penetration hole 101 is provided on the base 100, and the cooling tube 200 is slidably installed in the penetration hole 101; the penetration hole 101 here can extend from the far end surface of the base 100 to the far end surface of the base 100. Of course, the cooling tube 200 can also be fixed on the base 100, in which case the first spray part 210 is always located at the far side of the base 100.

[0071] In this embodiment, before the cooling component is inserted into the human body, the first spray part 210 can be 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.

[0072] See also Figure 3 , Figure 4 and Fig.12 In 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.

[0073] 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.

[0074] In a further embodiment, when the collar 310 is located on the far side of the distal 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 tube 200, and the bending angle between the collar 310 and the operating portion 320 is ninety degrees.

[0075] 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 tube 200, so that the cooling tube 200 can be extended into the collar 310. In this way, the collar 310 can be used to slightly bend the cooling tube 200 to change the direction of the far 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 90 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 larger friction force, so as 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 ring 310 and the operating portion 320 may also be greater than or less than ninety degrees, and this application does not limit this.

[0076] 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 .

[0077] 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 except the loop 310 and the portion of the second rope segment 302 except 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.

[0078] 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.

[0079] The present application also discloses a method for using a cooling assembly, which is applied to the above cooling assembly, including:

[0080] S100, controlling the cooling tube 200 to slide relative to the base 100 so that the first spray part 210 is located on the far side of the distal end surface of the base 100, so that the first spray part 210 is no longer wrapped by the base 100, thereby allowing the first spray part 210 to penetrate into the inner hole of the self-expanding stent 700.

[0081] S200 , controlling the first spraying unit 210 to penetrate into the self-expanding stent 700 .

[0082] S300 , cooling water of a preset pressure is introduced into the cooling pipe 200 to switch the second spray part 220 from a contracted state to an expanded state, and the first spray hole 211 and the second spray hole 221 are used to cool the self-expanding stent 700 .

[0083] This embodiment uses cooling water to cool the inner hole wall of the self-expanding stent 700 while also cooling the distal surface of the self-expanding stent 700, which can enhance the cooling effect on the self-expanding stent 700, thereby further 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.

[0084] See also Figure 1 , Figure 10 to Figure 11 , the embodiment of the present application also discloses an endoscope, including the cooling assembly described in any of the above embodiments, so that the endoscope has the beneficial effects of the above cooling assembly, which will not be repeated here. The insertion portion of the endoscope includes a base 100, and the cooling tube 200 is integrated in the insertion portion. Exemplarily, the cooling tube 200 here can be separated from the instrument channel on the base 100, or it can be arranged in the instrument channel on the base 100. 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.

[0085] Optionally, the insertion portion includes a front end seat and an instrument tube, an instrument channel is provided in the instrument tube, and the base is the front end seat.

[0086] In an optional embodiment, the endoscope further comprises an operating handle 500, the distal end of which is connected to the proximal end of the base 100, and 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.

[0087] 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 invention comprises a base (100) and a cooling pipe (200), wherein the cooling pipe (200) is arranged through the base (100), the side wall of the cooling pipe (200) comprises a first spraying portion (210), the first spraying portion (210) is provided with a plurality of first spraying holes (211) distributed at intervals along the circumference of the cooling pipe (200), and the cooling pipe (200) has a first state; When the cooling tube (200) is in the first state, the distal end of the cooling tube (200) is in a closed state, the first spray portion (210) is located on the distal side of the distal end surface of the base (100) and on the proximal side of the closed portion of the cooling tube (200), and the first spray portion (210) is capable of extending into the self-expanding stent (700); The cooling pipe (200) further comprises a second spray portion (220), the second spray portion (220) being connected to the distal end of the first spray portion (210), the second spray portion (220) being provided with a plurality of second spray holes (221) distributed at intervals along the circumference of the cooling pipe (200); The second spray portion (220) is switchable between a contracted state and an expanded state. When the second spray portion (220) is in the contracted state, the maximum radial dimension of the second spray portion (220) is smaller than a preset value, so that the second spray portion (220) can enter the self-expanding stent (700). When the second spray portion (220) is in the expanded state, the second spray portion (220) is located at the distal side of the first spray portion (210), and the maximum radial dimension of the second spray portion (220) is larger than the preset value, so that the second spray hole (221) corresponds to the end face of the self-expanding stent (700).

2. The cooling assembly according to claim 1, characterized in that When the second spray portion (220) is in the expanded state, the outer peripheral contour of the second spray portion (220) is annular, and the radial dimensions of all parts of the second spray portion (220) along its own circumference are greater than the preset value; and / or, When the second spray portion (220) is in the expanded state, the cross-sectional area of ​​the inner cavity of the second spray portion (220) gradually decreases along the direction extending from the proximal end to the distal end of the second spray portion (220).

3. The cooling assembly according to claim 1, characterized in that The second spraying portion (220) comprises a water outlet portion (222) and a blocking portion (223), and the plurality of second spraying holes (221) are all provided in the water outlet portion (222); When the second spray portion (220) is in the expanded state, the water outlet portion (222) is annular, the blocking portion (223) is spherical, a spherical cavity is provided inside the blocking portion (223), the outer edge of the water outlet portion (222) protrudes radially outward from the first spray portion (210) along all parts of its circumference, and the blocking portion (223) is located at the far side of the water outlet portion (222) and is connected to the water outlet portion (222).

4. The cooling assembly according to any one of claims 1 to 3, characterized in that: When the second spray portion (220) is in the contracted state, the second spray portion (220) is in a folded state, and the folded second spray portion (220) is sleeved with the first spray portion (210); When a fluid of preset pressure is passed into the cooling tube (200), the distal end of the cooling tube (200) can maintain the closed state, and the second spray portion (220) can switch from the contracted state to the expanded state.

5. The cooling assembly according to claim 4, characterized in that When the second spray portion (220) is in the contracted state, the folded second spray portion (220) covers at least a portion of the first spray hole (211).

6. The cooling assembly according to claim 4, characterized in that The folded second spray portion (220) is sleeved inside the first spray portion (210).

7. The cooling assembly according to claim 4, characterized in that The cooling pipe (200) is slidably inserted into the base (100) so that the first spraying part (210) is located at the far side of the far end surface of the base (100), or the first spraying part (210) is located inside the base (100).

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

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