CN118986247A - Medical instrument and guide tube - Google Patents
Medical instrument and guide tube Download PDFInfo
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- CN118986247A CN118986247A CN202411487390.XA CN202411487390A CN118986247A CN 118986247 A CN118986247 A CN 118986247A CN 202411487390 A CN202411487390 A CN 202411487390A CN 118986247 A CN118986247 A CN 118986247A
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- guide tube
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- 239000012530 fluid Substances 0.000 claims abstract description 41
- 241000469816 Varus Species 0.000 claims description 9
- 230000007306 turnover Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 8
- 241000973497 Siphonognathus argyrophanes Species 0.000 abstract 2
- 238000011982 device technology Methods 0.000 abstract 1
- 210000003445 biliary tract Anatomy 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000002183 duodenal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00128—Connectors, fasteners and adapters, e.g. on the endoscope handle mechanical, e.g. for tubes or pipes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Optics & Photonics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Endoscopes (AREA)
Abstract
本申请属于医疗器械技术领域，具体涉及一种医疗器械及导引管。该导引管的远端管口朝导引管的内部翻折形成内翻部，内翻部与导引管的其他部分的内壁之间形成有第一流道，内翻部被配置为，在第一流道内被通入压力超过第一预设值的流体时朝导引管远端之外展开；在内翻部的所有部分均处于展开状态的情况下，导引管的远端管口处于导通状态。在本实施例的第一流道内被通入流体时，内翻部会逐渐朝导引管之外翻转展开，在此过程中内翻部具有沿径向向外的分运动，如此，在将导引管对准狭窄或者闭合的目标腔道时，径向的分运动会带动目标腔道的内壁朝径向向外的方向移动，从而扩大目标腔道，便于展开后的内翻部进入目标腔道内。
The present application belongs to the field of medical device technology, and specifically relates to a medical device and a guide tube. The distal tube mouth of the guide tube is folded toward the inside of the guide tube to form an inverted portion, and a first flow channel is formed between the inverted portion and the inner wall of other parts of the guide tube. The inverted portion is configured to expand toward the outside of the distal end of the guide tube when a fluid with a pressure exceeding a first preset value is introduced into the first flow channel; when all parts of the inverted portion are in an expanded state, the distal tube mouth of the guide tube is in a conducting state. When a fluid is introduced into the first flow channel of the present embodiment, the inverted portion will gradually turn over and expand toward the outside of the guide tube. During this process, the inverted portion has a radial outward sub-movement. In this way, when the guide tube is aimed at a narrow or closed target cavity, the radial sub-movement will drive the inner wall of the target cavity to move in a radial outward direction, thereby expanding the target cavity and facilitating the inverted portion after expansion to enter the target cavity.
Description
Technical Field
The application belongs to the technical field of medical instruments, and particularly relates to a medical instrument and a guide tube.
Background
In the process of diagnosing and treating a patient by using an endoscope, a guide tube is usually required to be inserted into a body cavity of the patient, so that in order to facilitate the guide tube to enter a target body cavity, a doctor can operate the guide tube in a manner of manual rotation, swinging, linear pushing, reciprocating movement and the like, and the resistance applied by the target body cavity to the guide tube is reduced. However, in practice, when the surgeon encounters a narrow or closed target body cavity, it is difficult to insert the guide tube into the target body cavity even if the guide tube is operated by manual rotation, oscillation, linear advancement, reciprocation, or the like.
Disclosure of Invention
The application aims to provide a medical instrument and a guide tube, which can solve the problem that the guide tube is not easy to be inserted into a target body cavity at present.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, the present application provides a guide tube for accessing a body lumen, a distal end nozzle of the guide tube being folded inwardly of the guide tube to form an everted portion, a first flow passage being formed between the everted portion and an inner wall of the other portion of the guide tube, the everted portion being configured to expand outwardly of the distal end of the guide tube when fluid having a pressure exceeding a first preset value is introduced into the first flow passage;
with all portions of the everting portion in the deployed state, the distal nozzle of the guide tube is in the conductive state.
In a second aspect, the present application provides a medical device comprising a guide tube as described above.
The beneficial technical effects of the application are as follows:
According to the application, the distal pipe orifice of the guide pipe is turned inwards towards the guide pipe to form the turned-in part, a first flow channel is formed between the turned-in part and the inner wall of the other part of the guide pipe, fluid can be injected into the first flow channel through the proximal pipe orifice of the guide pipe, so that the turned-in part is gradually turned outwards and unfolded, the length of the guide pipe is gradually increased in the process, after the turned-in part is turned outwards and unfolded, the turned-in part is restored to the shape before the turned-in part, namely, the turned-in part positioned in the other part of the guide pipe is unfolded outwards, and in the process, the turned-in part has radial outward movement, so that when the guide pipe is aligned to a narrow or closed target cavity, the radial movement of the turned-in part can drive the inner wall of the target cavity to move towards the radial outward direction, and the target cavity is enlarged, and the unfolded turned-in part can conveniently enter the target cavity.
In addition, the turned-in portion of the present application is turned and unfolded outward to extend the guide tube in a predetermined direction, that is, the extending direction of the guide tube is constant after introducing the fluid into the guide tube, so that the guide tube can be precisely controlled to enter the target body cavity after being aligned with the target body cavity, without deviating from the target body cavity due to poor manipulability as in the prior art.
Furthermore, the application can control the pressure of the fluid flowing into the guide tube so as to control the pressure entering the first flow channel, which can control the acting force of the inward turning part when pushing the target cavity channel during extension, and can prevent the guide tube from exerting larger acting force on the target cavity channel to damage the target cavity channel.
Drawings
FIG. 1 is a schematic view of a guide tube according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a guide tube according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of a guide tube according to another embodiment of the present application;
FIG. 4 is a schematic view of a guide tube after a portion of an inversion portion is turned and unfolded;
FIG. 5 is a cross-sectional view of a guide tube after a portion of the varus disclosed in an embodiment of the application has been flipped out and deployed;
FIG. 6 is a schematic view of a guide tube after all parts of the turned-in portion are turned and unfolded outwards according to an embodiment of the present application;
FIG. 7 is a cross-sectional view of a guide tube after all portions of the varus disclosed in the embodiments of the application have been flipped out and deployed;
FIG. 8 is a schematic view of an endoscope according to an embodiment of the present application;
fig. 9 is an enlarged schematic view of the application at a in fig. 8.
Reference numerals illustrate:
100. A guide tube; 110. a base pipe section; 111. a mounting groove; 120. an ingress pipe section; 121. a connection part; 122. an inversion portion; 1221. a turnover section; 1222. an extension section; 123. an expanding section; 200. a first flow passage; 210. a second flow passage; 220. a third flow passage; 300. an insertion section; 310. an instrument channel.
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 medical apparatus and the guide tube 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 proximal and distal ends of the guide tube and its components in the environment of use, relative to the user's proximal and distal positions, 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".
In the prior art, when the guide tube is inserted into the target body cavity, the distal end of the guide tube is usually aligned with the target cavity, and then the proximal end of the guide tube is manually pushed to enable the guide tube to enter the target body cavity, but as the operator pushes the guide tube from the proximal end of the guide tube, the path of pushing force transmitted to the distal end of the guide tube is long, which can result in poor operability of the guide tube, so that the guide tube deviates from the preset insertion direction, and obviously, the guide tube is difficult to insert into the target body cavity.
As shown in fig. 1 to 7, the embodiment of the present application discloses a guide tube 100 for accessing a body cavity, wherein a distal end orifice of the guide tube 100 is folded toward the inside of the guide tube 100 to form an inversion portion 122, and the inversion portion 122 is deformable and needs to have a certain rigidity after being unfolded, so as to prevent the unfolded inversion portion 122 from being collapsed by the inner wall of the body cavity, for example, the inversion portion 122 may be made of an elastic material or a flexible material, and a first flow passage 200 is formed between the inversion portion 122 and the inner wall of the other portion of the guide tube 100. Specifically, the other portion of the guide tube 100 refers to the portion of the guide tube 100 other than the turned-in portion 122; here, the first flow path 200 is closed at one end and open at the other end, and the folded portion between the turned-in portion 122 and the other portion of the guide tube 100 closes the first flow path 200, and the end of the first flow path 200 (the proximal end of the first flow path 200) facing away from the folded portion is open.
The invagination 122 is configured to expand beyond the distal end of the guide tube 100 when fluid, which may be a gas or a liquid, is introduced into the first flow channel 200 at a pressure exceeding a first predetermined value, which may be selected according to the actual situation, and the present application is not limited to a specific value of the first predetermined value. Specifically, referring to fig. 5, after the fluid is introduced into the first flow channel 200, the fluid impacts the turnover between the turned-in portion 122 and the other portion of the guide tube 100, so as to drive the turned-in portion 122 to turn and spread outwards, and the direction of turning and spreading is shown by arrow lines in fig. 5. It should be noted that, after the turned-in portion 122 is turned out to the outside of the distal end of the guide tube 100, the turned-in portion is in the turned-in state and is not in the turned-in state any more, so for convenience of description, the present application defines the turned-in portion 122 turned out to the outside of the distal end of the guide tube 100 as the turned-in portion 123, where the other portion of the guide tube 100 includes the turned-in portion 123, and the first flow channel 200 includes a channel formed between an inner wall of the turned-in portion 123 and the turned-in portion 122.
With all portions of the introverted portion 122 in the deployed state, the distal orifice of the guide tube 100 is in a conductive state, so that a surgical instrument can be passed out of the distal orifice of the guide tube 100 to enter a target body cavity, which may be a biliary tract cavity, by the guide tube 100 of the present application, the nipple of the duodenal cavity is pulled open to enter the biliary tract cavity, and then a surgical instrument, such as a stone removal basket, can be inserted from the guide tube 100 to enter the biliary tract cavity, thereby treating stones in the biliary tract cavity.
In the present application, the distal end nozzle of the guide tube 100 is turned inwards towards the guide tube 100 to form the turned-in portion 122, a first flow channel 200 is formed between the turned-in portion 122 and the inner wall of the other portion of the guide tube 100, fluid can be injected into the first flow channel 200 through the proximal end nozzle of the guide tube 100, so that the turned-in portion 122 is turned outwards towards the guide tube 100, the length of the guide tube 100 will be gradually increased in the process, after the turned-in portion 122 is turned outwards and unfolded, the turned-in portion 122 will be restored to the shape before the turned-in, i.e. the turned-in portion 122 located in the other portion of the guide tube 100 will be unfolded outwards, during the process, the turned-in portion 122 has a radial outward movement, so that when the guide tube 100 is aligned with the narrow or closed target cavity, the radial movement will drive the inner wall of the target cavity to move towards the radial direction, thereby enlarging the target cavity, and facilitating the entrance of the turned-in portion 122 (i.e. the unfolded portion 123) into the target cavity.
In addition, the everting portion 122 of the present application is everted to extend the guide tube 100 in a predetermined direction, that is, the extending direction of the guide tube 100 is constant after the fluid is introduced into the guide tube 100, so that the guide tube 100 can be precisely controlled to enter the target body cavity after the guide tube 100 is aligned with the target body cavity, without being deviated from the target body cavity due to poor operability as in the prior art.
Furthermore, the present application can control the pressure of the fluid introduced into the guide tube 100 to control the pressure of the fluid introduced into the first flow channel 200, which can control the force applied when the inversion portion 122 pushes the target cavity when it is extended, and can prevent the guide tube 100 from applying a larger force to the target cavity to damage the target cavity.
Referring to fig. 2 and 3, in an alternative embodiment, the varus part 122 includes a turnover section 1221 and an extension section 1222, one end of the turnover section 1221 is turned with respect to the other part of the guide tube 100, where the turnover section 1221 is a turnover position between the varus part 122 and the other part of the guide tube 100, the other end of the turnover section 1221 is connected to the extension section 1222, and the extension section 1222 has a flat structure.
In this embodiment, the folded section 1221, the extension section 1222 and other parts of the guide tube 100 enclose the first flow channel 200, and the proximal end of the first flow channel 200 is open, and the distal end of the first flow channel 200 is blocked by the folded section 1221, so that the distance between the extension section 1222 and the inner wall of other parts of the guide tube 100 determines the volume of the first flow channel 200, and the larger the distance is, the larger the volume of the first flow channel 200 is, while in this embodiment, the dimension of the fourth flow channel formed in the flat structure can be reduced by setting the extension section 1222 to be in a flat structure, so as to reduce the inner space of the extension section 1222 occupying other parts of the guide tube 100, so that the first flow channel 200 has a larger volume. After the volume of the first flow channel 200 is increased, the flow rate of the fluid in the first flow channel 200 can be increased, obviously, the contact area between the fluid and the turnover section 1221 can be increased, namely the impact area of the fluid on the turnover section 1221 is increased, so that the inversion part 122 can be turned and unfolded outwards more rapidly, and the time for the guide tube 100 to enter the target body cavity is shortened; and the impact force of the fluid on the turnover section 1221 can be improved after the flow rate of the fluid in the first flow passage 200 is increased, so that the component force of the turned-in part 122 outwards along the radial direction is increased, and the target cavity passage is enlarged better. Of course, the extension 1222 may not have a flat structure, and the fourth flow channel formed in the flat structure may have a larger size.
In an alternative embodiment, along the thickness direction (the direction indicated by the x arrow line in fig. 2) of the extension 1222, the inner wall of the extension 1222 includes a first portion and a second portion disposed opposite to each other, and the first portion and the second portion are attached to each other, and all the portions of the extension along the extension direction thereof are in a flattened state, which intercepts the fourth flow channel formed in the inversion portion 122, and obviously prevents the fluid in the first flow channel 200 from leaking out of the guide tube 100 through the fourth flow channel, thereby preventing the fluid in the first flow channel 200 from being depressurized, so as to ensure that the fluid pressure in the first flow channel 200 exceeds a first preset value, and the inversion portion 122 is stably unfolded.
Since the fourth flow channel in the extension 1222 is located between the first portion and the second portion, and the first portion and the second portion of the inner wall of the extension 1222 in this embodiment are fit together, that is, the extension 1222 is flattened, the size of the fourth flow channel is minimized, so that the space of the extension 1222 occupied by the other portion of the guide tube 100 is minimized, and the distance between the extension 1222 and the inner wall of the other portion of the guide tube 100 is maximized, so as to further increase the volume of the first flow channel 200, shorten the time for the guide tube 100 to enter the target body cavity, and better enlarge the target cavity. Of course, the first portion and the second portion may not be attached to each other, and the first portion and the second portion may be separated by a certain distance.
To prevent fluid in the first flow passage 200 from entering the fourth flow passage formed in the inversion portion 122 and leaking out of the guide tube 100 via the fourth flow passage, in an alternative embodiment, the free end of the inversion portion 122 facing away from the other portion of the guide tube 100 is in a collapsed state to close the free end of the inversion portion 122. Specifically, when this embodiment is combined with the "varus 122 includes the folded-over section 1221 and the extension section 1222", the free end of the varus 122 is the end of the extension section 1222 facing away from the folded-over section 1221.
In this embodiment, when the free end of the inversion portion 122 collapses, the wall of the free end of the inversion portion 122 will collapse inward, so that the wall of the free end of the inversion portion 122 is fitted to intercept the fourth flow channel formed in the inversion portion 122, so that the free end of the inversion portion 122 is in a closed state, which obviously prevents the fluid in the first flow channel 200 from leaking out of the guide tube 100 through the fourth flow channel, thereby preventing the fluid in the first flow channel 200 from being depressurized, so as to ensure that the fluid pressure in the first flow channel 200 exceeds the first preset value, and the inversion portion 122 is stably unfolded. Of course, the free end of the turned-in portion 122 may not be in a flattened state, which is not limited by the present application.
In order to prevent the free end of the flattened inverted portion 122 from being flushed away by the fluid having the first preset value of the pressure position, so that the fourth flow channel in the inverted portion 122 is in an open state, in an alternative embodiment, the free end of the inverted portion 122 is provided with a connection structure, which may be an adhesive layer, for example, an adhesive layer formed by glue or double-sided tape, or a clamping structure, a hot-melt layer, or the like, and the connection structure is configured to maintain the flattened state of the free end of the inverted portion 122 when the fluid pressure in the first flow channel 200 is less than the second preset value, and to release the flattened state of the free end of the inverted portion 122 when the fluid pressure in the first flow channel 200 is greater than or equal to the second preset value, so as to conduct the free end of the inverted portion 122.
In this embodiment, when the fluid with a pressure greater than the first preset value and less than the second preset value is introduced into the proximal end of the guide tube 100, the fluid enters the first flow channel 200 to turn the turned-in portion 122 outwards for deployment, and the fluid cannot disconnect the connection structure due to the pressure of the fluid less than the second preset value, i.e. the connection structure keeps the free end of the turned-in portion 122 in a collapsed state, so that the fourth flow channel is cut off, and in the process of turning-out and deployment of the turned-in portion 122, the fourth flow channel is always in a cut-off state, which can enable the turned-in portion 122 to be stably deployed. When the turned-in portion 122 is not unfolded, fluid with a fluid pressure greater than or equal to the second preset value can be introduced into the proximal end of the guide tube 100, and at this time, the fluid can disconnect the connection structure, so that the free end of the turned-in portion 122 is released from the collapsed state to conduct the free end of the turned-in portion 122, and the surgical instrument can conveniently pass through the guide tube 100. Of course, the free end of the turned-in portion 122 may be provided with no connection structure, which is not limited by the present application.
Generally speaking, the turned-in portion 122 has a larger length, so after the distal end nozzle of the guide tube 100 is turned in to form the turned-in portion 122, if the length of the turned-in portion 122 is to be lengthened, a clamping tool may be extended from the proximal end nozzle of the guide tube 100, and the turned-in portion 122 is clamped by the clamping tool and pulled in a direction close to the proximal end nozzle of the guide tube 100, so that the length of the turned-in portion 122 is lengthened, while the length of the guide tube 100 is longer, and the clamping tool needs to be extended a longer distance to clamp the turned-in portion 122, which is inconvenient for lengthening the turned-in portion 122.
To facilitate lengthening the inversion portion 122, in an alternative embodiment, the guide tube 100 includes a base tube section 110 and an introduction tube section 120 that are separately disposed, the distal end orifice of the guide tube 100 is the distal end orifice of the introduction tube section 120, the portion of the introduction tube section 120 other than the inversion portion 122 is a connection portion 121, where the introduction tube section 120 and the connection portion 121 are all other portions of the guide tube 100 described above, the connection portion 121 is connected to the base tube section 110, a second flow channel 210 is formed between the inversion portion 122 and the inner wall of the connection portion 121, and the first flow channel 200 includes the second flow channel 210, where the second flow channel 210 is in communication with the inner flow channel of the base tube section 110. Specifically, at least part of the turned-in portion 122 of the present embodiment is located in the connecting portion 121, and when all parts of the turned-in portion 122 are located in the connecting portion 121, the first flow channel 200 is identical to the second flow channel 210; when only a portion of the turned-in portion 122 is located within the connecting portion 121, the turned-in portion 122 will extend out of the proximal orifice of the connecting portion 121 and into the base pipe segment 110, forming a third flow channel 220 between the turned-in portion 122 and the inner wall of the base pipe segment 110, and the first flow channel 200 includes the third flow channel 220 in addition to the second flow channel 210.
In this embodiment, the base pipe section 110 and the introducing pipe section 120 are separately arranged, that is, the base pipe section 110 and the introducing pipe section 120 are two independent pipe sections, the introducing pipe 100 can be formed by connecting the base pipe section 110 and the introducing pipe section 120, and before connecting the base pipe section 110 and the introducing pipe section 120, the distal pipe opening of the introducing pipe section 120 can be turned inwards to form the inversion part 122.
In an alternative embodiment, all portions of the ingress pipe section 120 are located within the base pipe section 110, meaning that with the everted portion 122 in the everted state, all portions of the ingress pipe section 120 are located within the base pipe section 110.
In this embodiment, after the turned-in portion 122 of the introducing pipe 120 is turned and unfolded outwards, the distal end nozzle of the unfolding portion 123 is the distal end nozzle of the introducing pipe 120 and is also the distal end nozzle of the guiding pipe 100, the distal end nozzle of the unfolding portion 123 is located at the distal side of the base pipe section 110, all the parts of the connecting portion 121 of the introducing pipe 120 are sleeved inside the base pipe section 110, and after the distal end nozzle of the introducing pipe 120 is turned inwards to form the turned-in portion 122, all the parts of the turned-in portion 122 are also located inside the base pipe section 110, so that the length dimension of the guiding pipe 100 can be reduced; and compared with the embodiment that the connecting part 121 is sleeved outside the base pipe section 110, the diameter of the guide pipe 100 can be reduced.
And/or, in an alternative embodiment, the in-turned portion 122 extends out of the proximal nozzle of the connection portion 121 and into the base pipe section 110, with a third flow passage 220 formed between the in-turned portion 122 and the inner wall of the base pipe section 110, the first flow passage 200 further comprising the third flow passage 220. In this embodiment, the turned-in portion 122 extends out of the connecting portion 121, so at least a portion of the turned-in portion 122 will be exposed outside the connecting portion 121, and the peripheral side of the portion of the turned-in portion 122 exposed outside the connecting portion 121 is not limited by the physical structure, so that the turned-in portion 122 is more convenient for flattening, namely: the varus 122 is flattened so that a portion of the varus 122 assumes a flat configuration.
Referring to fig. 2 and 3, in an alternative embodiment, a portion of the inner wall of the base pipe section 110 is recessed to form a mounting groove 111, and the connection portion 121 is mounted in the mounting groove 111, that is, the connection portion 121 is embedded in the base pipe section 110. The present embodiment utilizes the base pipe segment 110 itself to accommodate a portion of the connecting portion 121, which may make the connecting portion 121 further away from the portion of the everting portion 122 other than the turnup portion itself (i.e., the extension 1222 described above), thereby increasing the distance therebetween and the volume of the third flow channel 220, and further increasing the contact area between the fluid and the turnup portion of the everting portion 122, so as to shorten the time for the guide pipe 100 to enter the target body cavity and to better enlarge the target cavity.
Since the invagination portion 122 exerts a reaction force on the invagination portion 122 in the process of extending into the target body cavity, the reaction force is in the direction of extending from the distal end of the connection portion 121 to the proximal end, in order to prevent the connection portion 121 from being disconnected from the base pipe section 110 under the action of the reaction force, in an alternative embodiment, the mounting groove 111 has a proximal wall, and the connection portion 121 and the proximal wall are in a limit fit in the direction of extending from the distal end of the connection portion 121 to the proximal end, so that the proximal wall of the mounting groove 111 can stop the connection portion 121 in the case that the reaction force is exerted on the invagination portion 122 by the target body cavity, so as to share the reaction force and prevent the disconnection of the connection portion 121 from the base pipe section 110.
Since the fluid, after passing into the first flow channel 200, will exert a force on the inversion portion 122 and the connection portion 121 connected to the inversion portion 122 in a direction extending distally from the proximal end of the connection portion 121, in order to prevent the connection portion 121 from being disconnected from the base pipe section 110 by the force, and/or, in an alternative embodiment, the mounting groove 111 has a distal wall, the connection portion 121 and the distal wall being in a limited engagement in a direction extending distally from the proximal end of the connection portion 121, such that in the event of a fluid exerting such force on the connection portion 121, the distal wall of the mounting groove 111 is able to stop the connection portion 121 to share such force, preventing the disconnection of the connection portion 121 from the base pipe section 110.
The embodiment of the application also discloses a medical apparatus, which comprises the guide tube 100 according to any embodiment, so that the medical apparatus has the beneficial effects of the guide tube 100, and the description is omitted herein. As shown in fig. 8 to 9, the medical instrument may be an endoscope, or the medical instrument may be a surgical instrument used with an endoscope; in the case of an endoscope, the endoscope includes an insertion portion 300, an instrument channel 310 is provided in the insertion portion 300, and the guide tube 100 may be integrated in the instrument channel 310, at which time the guide tube 100 may be used to access the instrument. The endoscope in the embodiment of the application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope and the like, and the embodiment of the application does not limit the type of the endoscope.
The 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 (10)
1. A guide tube for accessing a body cavity, characterized in that a distal end nozzle of the guide tube (100) is folded towards the inside of the guide tube (100) to form an inverted portion (122), a first flow channel (200) is formed between the inverted portion (122) and the inner wall of the other part of the guide tube (100), and the inverted portion (122) is configured to be unfolded towards the outside of the distal end of the guide tube (100) when fluid with a pressure exceeding a first preset value is introduced into the first flow channel (200);
with all portions of the varus (122) in the deployed state, the distal nozzle of the guide tube (100) is in the conductive state.
2. The guide tube according to claim 1, wherein the turned-in portion (122) comprises a turned-in section (1221) and an extension section (1222), one end of the turned-in section (1221) is turned with respect to the other part of the guide tube (100), the other end of the turned-in section (1221) is connected to the extension section (1222), and the extension section (1222) has a flat structure.
3. The guide tube of claim 2, wherein the inner wall of the extension (1222) includes first and second portions disposed opposite each other along a thickness of the extension (1222), the first and second portions conforming.
4. A guide tube according to any one of claims 1 to 3, characterized in that the free end of the turned-in portion (122) facing away from the other portion of the guide tube (100) is in a collapsed state to close the free end of the turned-in portion (122).
5. The guide tube according to claim 4, wherein the free end of the everting portion (122) is provided with a connection structure configured to maintain the collapsed state of the free end of the everting portion (122) when the fluid pressure in the first flow passage (200) is less than a second preset value, and to release the collapsed state of the free end of the everting portion (122) to conduct the free end of the everting portion (122) when the fluid pressure in the first flow passage (200) is greater than or equal to a second preset value;
wherein the second preset value is greater than the first preset value.
6. A guide tube according to any one of claims 1 to 3, wherein the guide tube (100) comprises a base tube section (110) and an introduction tube section (120) which are arranged separately, the distal end nozzle of the guide tube (100) is the distal end nozzle of the introduction tube section (120), the part of the introduction tube section (120) except for the turned-in part (122) is a connecting part (121), the connecting part (121) is connected with the base tube section (110), a second flow passage (210) is formed between the turned-in part (122) and the inner wall of the connecting part (121), the first flow passage (200) comprises the second flow passage (210), and the second flow passage (210) is communicated with the inner flow passage of the base tube section (110).
7. The guide tube according to claim 6, characterized in that all parts of the introduction tube section (120) are located within the base tube section (110); and/or the number of the groups of groups,
The turned-in part (122) penetrates out of the proximal pipe orifice of the connecting part (121) and extends into the base pipe section (110), a third flow passage (220) is formed between the turned-in part (122) and the inner wall of the base pipe section (110), and the first flow passage (200) further comprises the third flow passage (220).
8. The guide tube according to claim 6, characterized in that the base tube section (110) is recessed in a partial region of the inner wall to form a mounting groove (111), the connecting portion (121) being mounted in the mounting groove (111).
9. The guide tube according to claim 8, wherein the mounting groove (111) has a proximal wall, the connecting portion (121) being in positive engagement with the proximal wall in a direction extending proximally from the distal end of the connecting portion (121); and/or the number of the groups of groups,
The mounting groove (111) has a distal end wall, and the connecting portion (121) is in a limit fit with the distal end wall in a direction extending distally from a proximal end of the connecting portion (121).
10. A medical device, characterized in that it comprises a guide tube (100) according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411487390.XA CN118986247B (en) | 2024-10-24 | 2024-10-24 | Medical devices and guide tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411487390.XA CN118986247B (en) | 2024-10-24 | 2024-10-24 | Medical devices and guide tubes |
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| CN118986247A true CN118986247A (en) | 2024-11-22 |
| CN118986247B CN118986247B (en) | 2025-04-08 |
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| CN202411487390.XA Active CN118986247B (en) | 2024-10-24 | 2024-10-24 | Medical devices and guide tubes |
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2024
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| US20030208223A1 (en) * | 2000-03-23 | 2003-11-06 | Kleiner Daniel Eduard | Device incorporating a hollow element for being positioned along a body cavity of a patient and method of positioning the same |
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|---|---|
| CN118986247B (en) | 2025-04-08 |
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