CN118948405B - Endoscope, cooling assembly and method of use thereof - Google Patents
Endoscope, cooling assembly and method of use thereof Download PDFInfo
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- CN118948405B CN118948405B CN202411445174.9A CN202411445174A CN118948405B CN 118948405 B CN118948405 B CN 118948405B CN 202411445174 A CN202411445174 A CN 202411445174A CN 118948405 B CN118948405 B CN 118948405B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/50—Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9528—Instruments specially adapted for placement or removal of stents or stent-grafts for retrieval of stents
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Abstract
本申请属于医疗器械技术领域，具体涉及一种内窥镜、冷却组件及其使用方法。该冷却组件应用于医疗器械并能够冷却自扩张支架，包括基座和冷却管，冷却管穿设于基座，冷却管的侧壁包括第一喷淋部，第一喷淋部设有多个沿冷却管的周向间隔分布的第一喷淋孔，冷却管具有第一状态；在冷却管处于第一状态的情况下，冷却管的远端处于闭合状态，第一喷淋部位于基座的远端面的远侧并位于冷却管的闭合处的近侧，且第一喷淋部能够伸入自扩张支架内。本申请能够有助于将自扩张支架从瘘孔拔除，并在拔除自扩张支架的过程中有助于减小瘘孔壁损伤的风险。
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
The application belongs to the technical field of medical instruments, and particularly relates to an endoscope, a cooling assembly and a using method thereof.
Background
In recent years, a malignant biliary stricture that cannot be resected or a blockage requiring biliary drainage often requires an operation using biliary drainage technology, for example, when a duodenal papilla cannot be passed, a bile duct or gall bladder may be pierced from a stomach wall or a duodenal wall, and then a self-expanding stent that bypasses a luminal organ (for example, a digestive tract such as a stomach or a duodenum) and other luminal organs (for example, a bile duct or gall bladder) may be inserted and left.
The self-expanding stent can form a fistula between the tubular organs, and after the fistula is formed between the tubular organs, the self-expanding stent needs to be pulled out so as to avoid blocking the fistula. At present, a biopsy forceps, a snare and other pulling tools are usually used for pulling out the self-expanding stent, but the self-expanding stent is not easy to be pulled out of the fistula Kong Bachu by adopting the mode, and even the wall of the fistula wall can be damaged.
Disclosure of Invention
It is an object of the present application to provide an endoscope, cooling assembly and method of use thereof that can facilitate removal of a self-expanding stent from a fistula Kong Bachu and that can help reduce the risk of injury to the walls of the fistula walls during removal of the self-expanding stent.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, the application provides a cooling assembly applied to a medical apparatus and capable of cooling a self-expanding bracket, comprising a base and a cooling pipe, wherein the cooling pipe penetrates through the base, the side wall of the cooling pipe comprises a first spraying part, the first spraying part is provided with a plurality of first spraying holes distributed at intervals along the circumferential direction of the cooling pipe, and the cooling pipe has a first state;
with the cooling tube in the first state, the distal end of the cooling tube is in the closed state, the first spray portion is located distally of the distal face of the base and proximal of the closure of the cooling tube, and the first spray portion is capable of extending into the self-expanding stent.
In an alternative embodiment, the cooling pipe further comprises a second spraying part, the second spraying part is connected with the distal end of the first spraying part, and a plurality of second spraying holes are formed in the second spraying part and distributed at intervals along the circumferential direction of the cooling pipe;
The second spraying part can be switched between a contracted state and an expanded state, the radial maximum size of the second spraying part is smaller than a preset value under the condition that the second spraying part is in the contracted state so that the second spraying part can enter the self-expanding bracket, and the second spraying part is positioned at the far side of the first spraying part under the condition that the second spraying part is in the expanded state, and the radial maximum size of the second spraying part is larger than the preset value so that the second spraying holes correspond to the end face of the self-expanding bracket.
In an alternative embodiment, the outer circumferential profile of the second spray part is ring-shaped, with the second spray part in the expanded state, the radial dimensions of all parts of the second spray part in the circumferential direction of itself being greater than a preset value, and/or,
With the second spray portion in the expanded state, the cross-sectional area of the interior cavity of the second spray portion gradually decreases in a direction extending from the proximal end to the distal end of the second spray portion.
In an alternative embodiment, the second spraying part comprises a water outlet part and a plugging part, and the plurality of second spraying holes are arranged on the water outlet part;
Under the condition that the second spraying part is in an expansion state, the water outlet part is annular, the blocking part is in a spherical crown shape, a spherical cavity is formed in the blocking part, all parts of the outer edge of the water outlet part along the circumferential direction of the water outlet part radially outwards protrude from the first spraying part, and the blocking part is positioned on the far side of the water outlet part and is connected with the water outlet part.
In an alternative embodiment, under the condition that the second spraying part is in a contracted state, the second spraying part is in a folded state, and the folded second spraying part is sleeved with the first spraying part;
in the case where the cooling pipe is supplied with a fluid of a preset pressure, the distal end of the cooling pipe can be kept in a closed state, and the second shower portion can be switched from the contracted state to the expanded state.
In an alternative embodiment, the folded second spray portion covers at least part of the first spray aperture with the second spray portion in a contracted state.
In an alternative embodiment, the folded second spray portion is nested within the first spray portion.
In an alternative embodiment, the cooling tube is slidably disposed within the base such that the first spray is located distally of the distal surface of the base or such that the first spray is located within the base.
In a second aspect, the present application provides a method for using a cooling assembly, applied to the cooling assembly, including:
Controlling the cooling tube to slide relative to the base so that the first spray position is located distally of the distal surface of the base;
controlling the first spraying part to penetrate into the self-expanding bracket;
And cooling water with preset pressure is introduced into the cooling pipe so that the second spraying part is switched from a contracted state to an expanded state, and the self-expanding bracket is cooled by utilizing the first spraying holes and the second spraying holes.
In a third aspect, the present application provides an endoscope comprising the cooling assembly described above, the insertion portion of the endoscope comprising a base, and the cooling tube being integrated in the insertion portion.
The beneficial technical effects of the application are as follows:
In the application, the first spraying part on the cooling pipe is provided with the first spraying hole, before the self-expanding bracket is pulled out, the cooling pipe can be in a first state, the first spraying part stretches into the self-expanding bracket, then cooling water is injected into the cooling pipe, the cooling water is sprayed out through the first spraying hole, thereby cooling the self-expanding bracket, the cooled self-expanding bracket can generate radial contraction, thereby reducing friction and adhesion between the self-expanding bracket and surrounding tissues, and then the self-expanding bracket is pulled out by adopting a pulling-out tool relatively easily, thereby reducing the risk of damage to the wall of the fistula.
In addition, the first spraying hole of this embodiment is equipped with a plurality ofly, and a plurality of first spraying holes are along the circumference interval distribution of cooling tube, and from the cooling water of first spraying hole spun can be from a plurality of directions effect to the interior pore wall of self-expanding support to can cool off self-expanding support more evenly, reduce self-expanding support in each part in self circumference direction and the friction and the adhesion of surrounding tissue, and then further reduce the risk of fistula pore wall damage.
Drawings
FIG. 1 is a schematic view of an endoscope according to an embodiment of the present application;
FIG. 2 is an enlarged schematic view of the application at A in FIG. 1;
FIG. 3 is a cross-sectional view of a portion of the cooling assembly with the first spray portion positioned within the endoscope in accordance with an embodiment of the present application;
FIG. 4 is a schematic view showing a part of the structure of the cooling assembly when the first shower part is located outside the endoscope according to the embodiment of the present application;
FIG. 5 is a cross-sectional view showing a portion of the structure of the cooling module when the first shower portion is located outside the endoscope in accordance with the embodiment of the present application;
FIG. 6 is an enlarged schematic view of the present application at B in FIG. 5;
FIG. 7 is a schematic illustration showing the cooperation of the cooling assembly and the self-expanding stent when the first shower portion is positioned outside the endoscope according to an embodiment of the present application;
FIG. 8 is a schematic diagram showing the cooperation of the cooling assembly and the self-expanding stent when the first spray part is positioned outside the endoscope according to the embodiment of the present application;
FIG. 9 is a second cross-sectional view of a portion of the cooling assembly when the first shower portion is positioned outside the endoscope, in accordance with an embodiment of the present application;
FIG. 10 is a schematic view showing a part of the structure of an endoscope according to an embodiment of the present application;
FIG. 11 is an enlarged schematic view of FIG. 10C in accordance with the present application;
fig. 12 is a schematic structural view of a pull-in cord according to an embodiment of the present application.
Reference numerals illustrate:
100. The self-expanding stent comprises a base, 101, a penetrating hole, 102, a penetrating channel, 110, a front end seat, 120, a penetrating pipe, 200, a cooling pipe, 210, a first spraying part, 211, a first spraying hole, 220, a second spraying part, 221, a second spraying hole, 222, a water outlet part, 223, a plugging part, 300, a sleeving rope, 301, a first rope part, 302, a second rope part, 310, a lantern ring, 320, an operating part, 400, a fixed sleeve, 500, an operating handle, 510, a handle shell, 520, a first driving part, 530, a second driving part, 540, a third driving part, 610, a gastric wall, 620, a hepatic liner wall and 700, and a self-expanding stent.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that some, but not all embodiments of the application are described. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The endoscope, the cooling assembly and the using method thereof provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
In various embodiments of the present application, "proximal" and "distal" refer to the endoscope and its components in the environment of use, relative to the user's proximal-distal position, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".
As shown in fig. 2 to 9, the embodiment of the present application discloses a cooling assembly applied to a medical instrument, which may be an endoscope or a snare device for taking out an unwanted object in a human body, and capable of cooling a self-expanding stent 700, the cooling assembly including a base 100 and a cooling tube 200, the cooling tube 200 being provided to pass through the base 100, wherein the base 100 is a base portion of the cooling assembly, which is capable of providing an installation space for the cooling tube 200 and of providing radial support for the cooling tube 200. When the medical device is an endoscope, the base 100 may be an insertion portion of the endoscope, and when the medical device is a snare device, the base 100 may be a catheter of the snare device, and the catheter may be inserted into a human body through an instrument channel of the insertion portion of the endoscope.
The side wall of the cooling pipe 200 includes a first spraying portion 210, the first spraying portion 210 is provided with a plurality of first spraying holes 211 distributed along the circumferential direction of the cooling pipe 200 at intervals, and the first spraying holes 211 penetrate through the side wall of the cooling pipe 200, so that the inner space and the outer space of the cooling pipe 200 are communicated, and after cooling water is introduced into the cooling pipe 200, the cooling water can be sprayed out from the periphery of the cooling pipe 200, so that the inner hole wall of the self-expanding bracket 700 is cooled. Optionally, one or more groups of first spraying holes 211 may be provided, and the groups of first spraying holes 211 are distributed at intervals along the axial direction of the first spraying portion 210, and each group of first spraying holes 211 includes a plurality of first spraying holes 211 distributed at intervals along the circumferential direction of the cooling pipe 200, so that the number of the first spraying holes 211 is more so provided to enhance the cooling effect on the self-expanding bracket 700.
The cooling tube 200 has a first state, in which the distal end of the cooling tube 200 is in a closed state with the cooling tube 200 in the first state, the first spraying portion 210 is located distal to the distal end face of the base 100 and proximal to the closed position of the cooling tube 200, so that cooling water introduced into the cooling tube 200 is not discharged from the distal end nozzle of the cooling tube 200, thereby ensuring the water pressure of the cooling water sprayed from the first spraying holes 211, and the first spraying portion 210 can extend into the self-expanding stent 700, that is, the external dimension of the first spraying portion 210 and the external dimension of the pipe section of the cooling tube 200 located distal to the first spraying portion 210 can be smaller than the internal dimension of the self-expanding stent 700, thereby allowing the first spraying portion 210 to enter the self-expanding stent 700. For example, when the cross section of the first spraying portion 210 is circular, the outer diameter of the first spraying portion 210 is smaller than the inner hole diameter of the self-expanding bracket 700, however, the cross section of the first spraying portion 210 may not be circular, it may be square, etc., and the shape of the first spraying portion 210 is not limited in the present application.
In the present application, the first spraying portion 210 on the cooling tube 200 is provided with the first spraying hole 211, before the self-expanding stent 700 is removed, the cooling tube 200 can be in the first state, the first spraying portion 210 is extended into the self-expanding stent 700, then cooling water is injected into the cooling tube 200, the cooling water is sprayed out through the first spraying hole 211, thereby cooling the self-expanding stent 700, the cooled self-expanding stent 700 can shrink radially, thereby reducing friction and adhesion between the self-expanding stent 700 and surrounding tissues, and then the self-expanding stent 700 is removed by using a removing tool relatively easily, thereby reducing risk of damage to the wall of fistula.
In addition, the first spraying holes 211 of the present embodiment are provided with a plurality of first spraying holes 211, and the plurality of first spraying holes 211 are distributed at intervals along the circumferential direction of the cooling pipe 200, and the cooling water sprayed from the first spraying holes 211 can act on the inner hole wall of the self-expanding bracket 700 from a plurality of directions, so that the self-expanding bracket 700 can be cooled more uniformly, friction and adhesion between each part of the self-expanding bracket 700 in the circumferential direction and surrounding tissues are reduced, and further the risk of damage to the wall of the fistula is reduced.
In some embodiments, the distal end of the cooling tube 200 may have only one closed state, that is, the distal end of the cooling tube 200 may be a closed end that cannot be conducted. Alternatively, the distal end of the cooling tube 200 may be switched between a closed state and an open state, with the distal end of the cooling tube 200 in the open state and the distal end of the cooling tube 200 in conduction. The deformation memory metal stent can be controlled to expand or shrink by the first conductive wire by arranging the deformation memory metal stent at the distal end of the cooling tube 200, so that the inner wall of the distal end of the cooling tube 200 is not attached or attached to each other to switch between the open state and the closed state.
To further enhance the cooling effect on the self-expanding stent 700, referring to fig. 7 to 9, in an alternative embodiment, the cooling tube 200 further includes a second spraying portion 220, the second spraying portion 220 is connected to the distal end of the first spraying portion 210, the second spraying portion 220 may be directly connected to the distal end of the first spraying portion 210 or may be indirectly connected to the distal end of the first spraying portion 210, in the case of indirect connection, a connection tube section of the cooling tube 200 is further provided between the second spraying portion 220 and the distal end of the first spraying portion 210, the distal end of the first spraying portion 210 is directly connected to the connection tube section, and a plurality of second spraying holes 221 are provided on the second spraying portion 220 and distributed along the circumferential direction of the cooling tube 200 at intervals.
The second spray portion 220 is switchable between a contracted state and an expanded state, i.e., the second spray portion 220 has a variability, and the contraction and expansion herein are both relatively speaking, with the second spray portion 220 in the contracted state, the radial maximum dimension of the second spray portion 220 is less than a preset value to enable the second spray portion 220 to enter the self-expanding stent 700. The radial maximum dimension of the second spray portion 220 refers to the dimension of the radially outermost edge of the second spray portion 220 along the cooling tube 200, and for example, when the present embodiment is combined with the embodiment in which the second spray portion 220 includes the water outlet portion 222 and the blocking portion 223", the radial maximum dimension of the second spray portion 220 is the diameter of the water outlet portion 222. The preset value here may be the inner diameter of the self-expanding stent 700, and the radial maximum dimension of the second spray portion 220 may be sufficient to allow the second spray portion 220 to enter the self-expanding stent 700.
In the case where the second spray portion 220 is in the expanded state, the second spray portion 220 is located distally 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 holes 221 correspond to the end face of the self-expanding stent 700, i.e., the second spray portion 220 is disposed opposite to the distal end face (right end face in fig. 7, 8) of the self-expanding stent 700 in the axial direction of the cooling tube 200. It should be noted that the self-expanding stent 700 in fig. 7 penetrates the stomach wall 610 and the intrahepatic bile duct wall 620.
The specific working process of this embodiment is as follows, when the self-expanding stent 700 needs to be cooled, the second spraying portion 220 is in a contracted state, so that the distal end of the cooling tube 200 penetrates into the self-expanding stent 700 until the first spraying portion 210 is located in the self-expanding stent 700, then the second spraying portion 220 is switched to an expanded state, at this time, the second spraying portion 220 is located at the distal side of the self-expanding stent 700, and the second spraying holes 221 are corresponding to the distal end face of the self-expanding stent 700, at this time, cooling water is introduced into the cooling tube 200, and not only can be sprayed out from the first spraying holes 211, but also can be sprayed out from the second spraying holes 221, so that the cooling water can cool the distal end face of the self-expanding stent 700 while cooling the inner hole wall of the self-expanding stent 700, which can promote the cooling effect on the self-expanding stent 700, further reduce the friction and adhesion between each part of the self-expanding stent 700 in the circumferential direction and surrounding tissues, and further reduce the risk of wall damage of fistulae.
In addition, the second spraying part 220 is disposed opposite to the distal end surface of the self-expanding stent 700 in the expanded state, so that the second spraying part 220 is in limit fit with the self-expanding stent 700 in the direction extending from the distal end of the cooling tube 200 to the proximal end, and thus the cooling tube 200 is pulled, the cooling tube 200 can apply the force to the self-expanding stent 700 in the direction extending from the distal end of the cooling tube 200 to the proximal end through the second spraying part 220 of the second spraying part, thereby assisting the pulling tool to pull the self-expanding stent 700 out of the fistula, and reducing the difficulty of pulling the self-expanding stent 700 out of the fistula.
Alternatively, the number of the second spraying holes 221 may be multiple groups, and the multiple groups of the second spraying holes 221 are spaced apart in the radial direction of the cooling pipe 200, and each group of the second spraying holes 221 includes a plurality of the second spraying holes 221 spaced apart in the circumferential direction of the cooling pipe 200.
In some embodiments, the cooling assembly may further include a second conductive wire, the deformation memory alloy bracket is disposed in the second spraying portion 220, and the deformation memory alloy bracket is electrically connected to the second conductive wire, and when the deformation memory alloy bracket is in a normal state, the second spraying portion 220 is in the above-mentioned contracted state, and when the deformation memory alloy bracket is energized through the second conductive wire, the deformation memory alloy bracket radially expands, so that the second spraying portion 220 is in the above-mentioned expanded state.
In other embodiments, the second spraying portion 220 is an elastic deformation body, the cooling assembly further includes a traction member, the distal end of the traction member is connected with the distal end of the elastic deformation body, the elastic deformation body is in a contracted state in a natural state, the traction member drives the distal end of the elastic deformation body to move towards the proximal end under the condition that the proximal end of the traction member is pulled, so that the elastic deformation body is radially expanded and deformed, the elastic deformation body is in an expanded state, and the elastic deformation body can be recovered from the expanded state to the contracted state through deformation of the elastic deformation body. The traction element may be a traction rope, a transmission rod with a certain elastic deformation capacity, such as an elongated rod of plastic or metal, a steel wire, etc.
In still other embodiments, the second spray portion 220 is a flexible deformation body, and the cooling assembly further includes a drive rod coupled to a distal end of the flexible deformation body, the drive rod being movable relative to the cooling tube 200 to switch the flexible deformation body between the contracted state and the expanded state.
In an alternative embodiment, in the case that the second spraying part 220 is in the expanded state, the outer circumferential profile of the second spraying part 220 is in a ring shape, and radial dimensions of all parts of the second spraying part 220 in the circumferential direction thereof are greater than a preset value, so that the second spraying holes 221 may be distributed within a range of three hundred sixty degrees, so that the second spraying holes 221 correspond to the parts of the end surface of the self-expanding bracket 700 in the circumferential direction thereof, to more uniformly cool the end surface of the self-expanding bracket 700. Of course, the outer peripheral contour of the second spraying part 220 may not be annular, but may be arc-shaped.
And/or referring to fig. 9, in an alternative embodiment, with the second spray portion 220 in the expanded state, the cross-sectional area of the interior cavity of the second spray portion 220 gradually decreases in a direction extending distally from the proximal end of the second spray portion 220.
Compared with the embodiment of the second spray portion 220 in which the cross-sectional area of the inner cavity is kept constant in 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 is smaller in this embodiment, and under the condition that the flow rate of the cooling water is unchanged, the cooling water can be quickly filled in the inner cavity of the second spray portion 220 to be sprayed out of the second spray portion 220 more quickly, so that the end face of the self-expanding bracket 700 begins to be cooled only when the temperature of the inner hole wall of the self-expanding bracket 700 is prevented from being lowered to be lower, that is, the temperature difference between the inner hole wall and the end face of the self-expanding bracket 700 is prevented from being excessively large, and thus the uniformity of cooling of the self-expanding bracket 700 is improved.
With continued reference to fig. 9, in an alternative embodiment, the second spraying portion 220 includes a water outlet portion 222 and a blocking portion 223, the plurality of second spraying holes 221 are all disposed in the water outlet portion 222, the water outlet portion 222 is annular, the blocking portion 223 is spherical, a spherical cavity is formed in the blocking portion 223, all portions of the outer edge of the water outlet portion 222 along the circumferential direction thereof radially protrude outside the first spraying portion 210, and the blocking portion 223 is located at the far side of the water outlet portion 222 and is connected with the water outlet portion 222. Specifically, the spherical cavity of the blocking portion 223 is opened toward the water outlet portion 222, and the water outlet portion 222 cooperates with the spherical cavity to form the inner cavity of the second spraying portion 220.
In this 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, and under the condition that the flow rate of the cooling water is unchanged, the cooling water can be quickly filled in the inner cavity of the second spray portion 220 to be sprayed out of the second spray portion 220 more quickly, so that the end face of the self-expanding stent 700 begins to cool only when the temperature of the inner hole wall of the self-expanding stent 700 has fallen to be lower, that is, the temperature difference between the inner hole wall and the end face of the self-expanding stent 700 is prevented from being too large, and thus the uniformity of cooling the self-expanding stent 700 is improved.
Referring to fig. 6, in an alternative embodiment, in the case where the second spraying portion 220 is in the contracted state (the state shown in fig. 3 to 6), the second spraying portion 220 is in the folded state, and the folded second spraying portion 220 is sleeved with the first spraying portion 210, the distal end of the cooling tube 200 can be kept in the closed state, and the second spraying portion 220 can be switched from the contracted state to the expanded state (the state shown in fig. 7 to 9) in the case where the cooling tube 200 is supplied with the fluid of the preset pressure.
The specific working process of this embodiment is as follows, a fluid with a preset pressure is introduced into the proximal end of the cooling tube 200, and the fluid flows to the distal end of the cooling tube 200, and since the distal end of the cooling tube 200 is in a closed state, the cooling water acts on the distal end of the cooling tube 200 and applies pressure to the distal end of the cooling tube 200, so that a force is applied to the second spraying portion 220, so that the second spraying portion 220 is not sleeved with the first spraying portion 210 and is located at the distal side of the first spraying portion 210, and at this time, the second spraying portion 220 is switched to an expanded state. It can be seen that, in this embodiment, the second spraying portion 220 can be switched from the contracted state to the expanded state by introducing the fluid with the predetermined pressure into the cooling tube 200, so that no additional driving mechanism (such as the second conductive wire, the traction wire, and the transmission rod) is required, which can simplify the structure of the cooling assembly.
With continued reference to fig. 6, in an alternative embodiment, with the second spray portion 220 in a contracted state, the folded second spray portion 220 covers at least a portion of the first spray holes 211.
If the folded second spraying portion 220 does not cover the first spraying hole 211, when cooling water is introduced into the cooling pipe 200 to enable the second spraying portion 220 to be out of sleeve connection with the first spraying portion 210, the cooling water is decompressed from the first spraying hole 211, so that the acting force of the cooling water on the second spraying portion 220 is reduced, and the effect that the second spraying portion 220 is out of sleeve connection with the first spraying portion 210 is weakened. In this embodiment, the folded second spraying portion 220 is used to cover the first spraying hole 211, so that the pressure of the cooling water leaking from the first spraying hole 211 can be reduced, and even the pressure of the cooling water leaking from the first spraying hole 211 can be avoided, thereby solving the problem of weakening the effect that the second spraying portion 220 is separated from the first spraying portion 210. Of course, the folded second spraying portion 220 may not cover the first spraying hole 211, which is not limited by the present application.
With continued reference to fig. 6, in an alternative embodiment, the folded second spraying portion 220 is sleeved inside the first spraying portion 210, which can prevent the second spraying portion 220 from occupying the external space of the first spraying portion 210, so as to reduce the pipe diameter of the cooling pipe 200, and facilitate the insertion of the cooling pipe 200 into a human body. Of course, the folded second spraying portion 220 may also be sleeved outside the first spraying portion 210, which is not limited by the present application.
Referring to fig. 2-4, in an alternative embodiment, the cooling tube 200 is slidably disposed within the base 100 such that the first spray portion 210 is distal to the distal surface of the base 100 or such that the first spray portion 210 is within the base 100. Illustratively, the base 100 is provided with a through hole 101, and the cooling tube 200 is slidably disposed in the through hole 101, where the through hole 101 may extend from a distal end surface of the base 100 to a distal end surface of the base 100. Of course, the cooling tube 200 may be fixedly disposed on the base 100, and the first spraying portion 210 is always located on the far side of the base 100.
In this embodiment, the first spraying portion 210 may be located in the base 100 before the cooling module is inserted into the human body, which may reduce the length of the portion of the cooling tube 200 protruding from the distal end surface of the base 100, thereby facilitating the insertion of the cooling module into the human body and reducing the risk of damaging human tissue at the portion of the cooling tube 200 protruding from the distal end surface of the base 100.
Referring to fig. 3, 4 and 12, in an alternative embodiment, the cooling assembly further includes a pull-in cord 300, the base 100 is provided with a through channel 102, the through channel 102 is spaced from the cooling tube 200, the pull-in cord 300 includes a collar 310 and an operating portion 320 connected to each other, the collar 310 is disposed at a distal end of the operating portion 320, the operating portion 320 is movably disposed through the through channel 102, and the operating portion 320 is capable of moving relative to the through channel 102, so that the collar 310 is located at a distal side of a distal end surface of the base 100 and is sleeved with the self-expanding stent 700. Alternatively, a penetrating pipe 120 may be disposed on the base 100, where the penetrating pipe 120 penetrates the base 100, and a penetrating channel 102 is formed in the penetrating pipe 120.
In the present application, the pull-out cord 300 is threaded in the threading channel 102, the pull-out cord 300 includes an operation portion 320 and a collar 310 connected to each other, the operation portion 320 is movably threaded in the threading channel 102, and when the operation portion 320 is controlled to move relative to the threading channel 102, the collar 310 can be moved to a distal side of a distal end face of the front end shell and separated from the distal end face of the front end shell, so that the self-expanding stent 700 can be tightly sleeved near the base 100 by using the collar 310, so as to facilitate the removal of the self-expanding stent 700.
In a further embodiment, with collar 310 distal to the distal face of base 100, collar 310 is bent relative to handle 320 such that the space within collar 310 is oriented toward cooling tube 200, with a ninety degree bend angle between collar 310 and handle 320.
In this embodiment, in the case that the collar 310 is located at the distal side of the distal end face of the base 100, the collar 310 is bent with respect to the operation portion 320, so that the space in the collar 310 faces the cooling tube 200, and thus the cooling tube 200 can be extended into the collar 310, and thus the collar 310 can be used to slightly bend the cooling tube 200, so as to change the direction of the distal end of the cooling tube 200, and facilitate the entry of the cooling tube 200 into the inclined expandable stent. And the bending angle between the collar 310 and the operation part 320 is ninety degrees in this embodiment, so that when the collar 310 bends the cooling tube 200, the positive pressure applied by the collar 310 to the cooling tube 200 is perpendicular to the axis of the cooling tube 200, which can enable a large friction force between the collar 310 and the cooling tube 200 to reduce the risk of slipping of the collar 310 relative to the cooling tube 200, thereby stably bending the cooling tube 200. Of course, the bending angle between the collar 310 and the operation portion 320 may be greater or less than ninety degrees, which is not limited by the present application.
In a further embodiment, the pull-cord 300 is made of a memory alloy, and the pull-cord 300 is tensioned to bend the cooling tube 200 in case the pull-cord 300 is sprayed with cooling water.
In an alternative embodiment, the retrieval string 300 comprises a first string portion 301 and a second string portion 302 arranged in parallel, the distal end of the first string portion 301 and the distal end of the second string portion 302 being connected, the distal end of the first string portion 301 and the distal end of the second string portion 302 being bent in directions facing away from each other to form a collar 310, in which case the portions of the first string portion 301 other than the collar 310 and the portions of the second string portion 302 other than the collar 310 together form an operating portion 320, the collar 310 being capable of being located distally of the distal end face of the base 100 in case the first string portion 301 and the second string portion 302 are simultaneously moved in a direction extending from the proximal end to the distal end of the base 100, and in case the first string portion 301 is moved relative to the second string portion 302, the cross-sectional area of the retrieval space formed in the collar 310 is changed.
In a further embodiment, the cooling assembly further comprises a fixing sleeve 400, the fixing sleeve 400 is slidably arranged in the penetrating channel 102, a through hole penetrating through the fixing sleeve 400 along the axial direction of the fixing sleeve 400 is formed in the fixing sleeve 400, the first rope portion 301 is penetrated in the through hole, the second rope portion 302 is fixedly connected with the fixing sleeve 400, and in the condition that the collar 310 is located on the far side of the distal end face of the front end shell, a part of the fixing sleeve 400 extends out of the penetrating channel 102, so that the fixing sleeve 400 can be used for restraining the part of the sleeve taking rope 300 located between the collar 310 and the distal end hole of the penetrating channel 102, and therefore bending deformation of the part is prevented, and the collar 310 is guaranteed to be located at a preset position.
The embodiment of the application also discloses a using method of the cooling assembly, which is applied to the cooling assembly and comprises the following steps:
S100, controlling the cooling tube 200 to slide relative to the base 100 so that the first spraying portion 210 is located distally of the distal surface of the base 100, such that the first spraying portion 210 is no longer wrapped by the base 100, thereby allowing the first spraying portion 210 to penetrate into the inner bore of the self-expanding stent 700.
S200, controlling the first spraying part 210 to penetrate into the self-expanding bracket 700.
And S300, cooling water with preset pressure is introduced into the cooling pipe 200 so as to enable the second spraying part 220 to be switched from a contracted state to an expanded state, and the self-expanding bracket 700 is cooled by utilizing the first spraying holes 211 and the second spraying holes 221.
The present embodiment cools the inner hole wall of the self-expanding stent 700 by cooling water and simultaneously cools the distal end surface of the self-expanding stent 700, which can improve the cooling effect of the self-expanding stent 700, further reduce the friction and adhesion between each part of the self-expanding stent 700 in the circumferential direction and surrounding tissues, and further reduce the risk of damage to the wall of the fistula.
Referring to fig. 1 and fig. 10 to fig. 11, an embodiment of the present application further discloses an endoscope, which includes the cooling assembly according to any one of the embodiments, so that the endoscope has the beneficial effects of the cooling assembly, and the insertion portion of the endoscope includes a base 100, and a cooling tube 200 is integrated in the insertion portion. Illustratively, the cooling tube 200 herein may be disposed in a spaced apart relationship with the instrument channel on the base 100 or may be disposed within the instrument channel on the base 100. The endoscope in the embodiment of the application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope and the like, and the embodiment of the application does not limit the type of the endoscope.
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.
In an alternative 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 base 100, 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 are movable relative to the handle housing 510, the first driving member 520 is connected to the first cable section 301, the second driving member 530 is connected to the second cable section 302, the operating portion 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 first driving member 520 or the second driving member 530 can be independently driven to move to adjust the pulling area of the collar 310. The cooling tube 200 is connected to a third driving member 540, by which the cooling tube 200 is driven to slide between a first position and a second position.
The foregoing embodiments of the present application mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein. The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (8)
1. A cooling assembly applied to a medical apparatus and capable of cooling a self-expanding bracket (700), comprising a base (100) and a cooling tube (200), wherein the cooling tube (200) is arranged on the base (100) in a penetrating manner, the side wall of the cooling tube (200) comprises a first spraying part (210), the first spraying part (210) is provided with a plurality of first spraying holes (211) distributed at intervals along the circumferential direction of the cooling tube (200), and the cooling tube (200) has a first state;
With the cooling tube (200) in the first state, the distal end of the cooling tube (200) is in a closed state, the first spray (210) is distal of the distal face of the base (100) and proximal of the closure of the cooling tube (200), and the first spray (210) is extendable into the self-expanding stent (700);
the cooling pipe (200) further comprises a second spraying part (220), the second spraying part (220) is connected with the far end of the first spraying part (210), and a plurality of second spraying holes (221) which are distributed at intervals along the circumferential direction of the cooling pipe (200) are formed in the second spraying part (220);
The second spraying part (220) can be switched between a contracted state and an expanded state, when the second spraying part (220) is in the contracted state, the radial maximum size of the second spraying part (220) is smaller than a preset value so that the second spraying part (220) can enter the self-expanding bracket (700), when the second spraying part (220) is in the expanded state, the second spraying part (220) is located on the far side of the first spraying part (210), and when the second spraying part (220) is in the expanded state, the radial maximum size of the second spraying part (220) is larger than the preset value so that the second spraying holes (221) correspond to the end face of the self-expanding bracket (700).
2. The cooling module according to claim 1, wherein, in the case where the second shower portion (220) is in the expanded state, an outer peripheral contour of the second shower portion (220) is annular, a radial dimension of all portions of the second shower portion (220) in a circumferential direction thereof is greater than the preset value, and/or,
The cross-sectional area of the lumen of the second spray portion (220) gradually decreases in a direction extending distally from the proximal end of the second spray portion (220) with the second spray portion (220) in the expanded state.
3. The cooling assembly according to claim 1, wherein the second spray portion (220) comprises a water outlet portion (222) and a blocking portion (223), and a plurality of the second spray holes (221) are all provided in the water outlet portion (222);
Under the condition that the second spraying part (220) is in the expansion state, the water outlet part (222) is annular, the blocking part (223) is spherical, a spherical cavity is formed in the blocking part (223), all parts of the outer edge of the water outlet part (222) along the circumferential direction of the water outlet part radially protrude outwards from the first spraying part (210), and the blocking part (223) is located on the far side of the water outlet part (222) and is connected with the water outlet part (222).
4. A cooling assembly according to any one of claims 1 to 3, wherein with the second spray portion (220) in the contracted state, the second spray portion (220) is in a folded state, and the folded second spray portion (220) is in socket connection with the first spray portion (210);
The distal end of the cooling tube (200) is capable of maintaining the closed state and the second spray portion (220) is capable of switching from the contracted state to the expanded state with the cooling tube (200) being fed with a fluid of a preset pressure.
5. The cooling assembly according to claim 4, wherein the folded second spray portion (220) covers at least part of the first spray holes (211) with the second spray portion (220) in the contracted state.
6. The cooling assembly of claim 4, wherein the folded second spray portion (220) is nested within the first spray portion (210).
7. The cooling assembly of claim 4, wherein the cooling tube (200) is slidably disposed within the base (100) such that the first spray portion (210) is distal to a distal face of the base (100) or such that the first spray portion (210) is within the base (100).
8. An endoscope comprising a cooling assembly according to any of claims 1 to 7, the insertion portion of which comprises the base (100), the cooling tube (200) being integrated in the insertion portion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411445174.9A CN118948405B (en) | 2024-10-16 | 2024-10-16 | Endoscope, cooling assembly and method of use thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411445174.9A CN118948405B (en) | 2024-10-16 | 2024-10-16 | Endoscope, cooling assembly and method of use thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5037427A (en) * | 1987-03-25 | 1991-08-06 | Terumo Kabushiki Kaisha | Method of implanting a stent within a tubular organ of a living body and of removing same |
| JP2021159392A (en) * | 2020-03-31 | 2021-10-11 | 日本ゼオン株式会社 | Catheter for endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6702846B2 (en) * | 1996-04-09 | 2004-03-09 | Endocare, Inc. | Urological stent therapy system and method |
| US20040260377A1 (en) * | 2003-06-17 | 2004-12-23 | Medinol, Ltd. | Shape memory alloy endoprosthesis delivery system |
| WO2006086304A1 (en) * | 2005-02-08 | 2006-08-17 | Wilson-Cook Medical Inc. | Self contracting stent |
| CN106413631B (en) * | 2014-05-28 | 2018-08-17 | 波士顿科学国际有限公司 | Catheter with radiofrequency cutting tip and heated balloon |
| US20220125434A1 (en) * | 2019-01-22 | 2022-04-28 | Mayo Foundation For Medical Education And Research | Single anastomosis gastrointestinal tract bypass endoscopic systems and methods |
| EP3854352A1 (en) * | 2020-01-27 | 2021-07-28 | Biotronik AG | Delivery system for a self-expanding structure comprising an improved cooling mechanism therefor |
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2024
- 2024-10-16 CN CN202411445174.9A patent/CN118948405B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5037427A (en) * | 1987-03-25 | 1991-08-06 | Terumo Kabushiki Kaisha | Method of implanting a stent within a tubular organ of a living body and of removing same |
| JP2021159392A (en) * | 2020-03-31 | 2021-10-11 | 日本ゼオン株式会社 | Catheter for endoscope |
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| CN118948405A (en) | 2024-11-15 |
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