CN118873189B - Introducer sheath and sheath tube assembly - Google Patents
Introducer sheath and sheath tube assembly Download PDFInfo
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- CN118873189B CN118873189B CN202411339106.4A CN202411339106A CN118873189B CN 118873189 B CN118873189 B CN 118873189B CN 202411339106 A CN202411339106 A CN 202411339106A CN 118873189 B CN118873189 B CN 118873189B
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- 238000003780 insertion Methods 0.000 claims abstract description 73
- 230000037431 insertion Effects 0.000 claims abstract description 73
- 238000005452 bending Methods 0.000 claims description 50
- 230000000149 penetrating effect Effects 0.000 claims 2
- 238000011982 device technology Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 20
- 239000004575 stone Substances 0.000 description 20
- 239000002184 metal Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 208000000913 Kidney Calculi Diseases 0.000 description 1
- 206010029148 Nephrolithiasis Diseases 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000000626 ureter Anatomy 0.000 description 1
- 210000003708 urethra Anatomy 0.000 description 1
- 230000002485 urinary effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
-
- 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
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
-
- 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
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/00336—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means with a protective sleeve, e.g. retractable or slidable
-
- 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
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/0034—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with suction of debris
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Endoscopes (AREA)
Abstract
本申请属于医疗器械技术领域，具体涉及一种导引鞘及其鞘管组件。该鞘管组件包括鞘管，鞘管内具有用于容纳至少部分内窥镜的插入部的定位空间，定位空间的轴线位于鞘管的轴线的第一侧，鞘管的轴线的另一侧为与第一侧相背的第二侧；鞘管设有施力结构，施力结构能够对插入部位于定位空间的部分施加第一方向的作用力，其中，第一方向为由第二侧向第一侧延伸的方向。本实施例在鞘管上设有施力结构，施力结构能够对插入部施加第一方向的作用力，从而使插入部保持位于定位空间内，防止插入部朝第一方向的反方向活动以挤占部分位于定位空间一侧的流动空间，进而保证插入部偏置于鞘管内，为流动空间预留较大的尺寸，防止出现堵塞的情况。
The present application belongs to the field of medical device technology, and specifically relates to a guide sheath and a sheath tube assembly thereof. The sheath tube assembly includes a sheath tube, and the sheath tube has a positioning space for accommodating at least part of the insertion part of the endoscope, the axis of the positioning space is located on the first side of the axis of the sheath tube, and the other side of the axis of the sheath tube is the second side opposite to the first side; the sheath tube is provided with a force-applying structure, and the force-applying structure can apply a force in a first direction to the part of the insertion part located in the positioning space, wherein the first direction is a direction extending from the second side to the first side. In this embodiment, a force-applying structure is provided on the sheath tube, and the force-applying structure can apply a force in a first direction to the insertion part, so that the insertion part remains in the positioning space, and prevents the insertion part from moving in the opposite direction of the first direction to occupy part of the flow space located on one side of the positioning space, thereby ensuring that the insertion part is biased in the sheath tube, and a larger size is reserved for the flow space to prevent blockage.
Description
Technical Field
The application belongs to the technical field of medical instruments, and particularly relates to an introducer sheath and a sheath tube assembly thereof.
Background
The guide sheath is commonly used in urological endoscopy or surgery, and can establish a surgical channel in the urinary system to assist the passage of endoscopes and surgical instruments through lumens such as the urethra, ureter, etc., thereby improving the effectiveness and safety of the examination and treatment.
When the guiding sheath is used for taking kidney stones, the guiding wire can be used for placing the sheath tube of the guiding sheath into the kidney, then the insertion part of the endoscope is inserted into the sheath tube, so that the stones are observed and crushed, and after the stones are crushed, the stones can be sucked into a gap between the sheath tube and the insertion part by using the sheath tube, so that the stones are discharged. However, in practice, when stones are sucked in a human body by using a sheath, a problem of unsmooth stone discharge is liable to occur.
Disclosure of Invention
The application aims to provide an introducer sheath and a sheath tube assembly thereof, which can reduce the problem that when stones in a human body are sucked by using a sheath tube and waiting for sucking objects, clamping stagnation is easy to occur.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, the present application provides a sheath assembly for an introducer sheath, comprising a sheath having a positioning space therein for receiving an insertion portion of at least part of an endoscope, an axis of the positioning space being located on a first side of an axis of the sheath, the other side of the axis of the sheath being a second side opposite the first side;
The sheath tube is provided with a force application structure, and the force application structure can apply a first direction acting force to the part of the insertion part, which is positioned in the positioning space, wherein the first direction is a direction extending from the second side to the first side.
In a second aspect, the present application provides an introducer sheath comprising the sheath assembly described above.
The beneficial technical effects of the application are as follows:
In this embodiment, the sheath tube has a positioning space, the axis of the positioning space is located on the first side of the axis of the sheath tube, that is, the positioning space is not located in the middle of the sheath tube, so that the space located on one side of the positioning space along the opposite direction of the first direction in the sheath tube has a larger size, and the space is a flowing space for the object to be sucked to pass through. Therefore, the insertion part is arranged in the positioning space, so that the flowing space at one side of the insertion part has a larger size, and the purpose of blocking prevention can be achieved. In addition, the force application structure is arranged on the sheath tube, and the force application structure can apply force in the first direction to the insertion part, so that the insertion part is kept in the positioning space, the insertion part is prevented from moving in the opposite direction of the first direction to squeeze part of the flowing space on one side of the positioning space, the insertion part is further ensured to be biased in the sheath tube, a larger size is reserved for the flowing space, and the blocking is prevented.
Drawings
FIG. 1 is a schematic view of a sheath assembly with an anti-clogging portion according to an embodiment of the present application in a contracted state;
FIG. 2 is a schematic view of a structure of a sheath tube assembly with a hidden skin in a contracted state of an anti-blocking portion according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of an anti-jam portion of an embodiment of the present application with the sheath tube assembly concealing the skin in a contracted state;
FIG. 4 is an enlarged schematic view of the application at A in FIG. 3;
FIG. 5 is a cross-sectional view of a first tube segment disclosed in an embodiment of the application;
FIG. 6 is an enlarged schematic view of the present application at B in FIG. 5;
fig. 7 is a block diagram of an anti-clogging part disclosed in an embodiment of the present application;
FIG. 8 is a cross-sectional view of an anti-jam portion of the present disclosure with the sheath tube assembly concealing the skin in an inflated condition;
FIG. 9 is an enlarged schematic view of the present application at C in FIG. 8;
FIG. 10 is an elevation view of a first tube segment according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram illustrating the cooperation of a first pipe section and a passive bending section according to an embodiment of the present application;
FIG. 12 is a schematic view of a portion of a sheath assembly with an anti-clogging portion according to an embodiment of the present application in a contracted state;
FIG. 13 is a schematic view of a portion of a sheath assembly with an anti-clogging portion in an expanded state, according to another embodiment of the present application;
fig. 14 is an enlarged schematic view of the application at D in fig. 13.
Reference numerals illustrate:
10. Sheath tube 100, first tube section 110, sleeve joint part 111, deformation notch 200, second tube section 210, anti-blocking part 211, main body part 2111, deformable body 2112, elastic support 212, mounting ring 300, retainer 400, transmission rod 500, protruding part 501, abutting area 510, first protruding part 520, second protruding part 600, skin 700, inserting part 710, active bending section 720, passive bending section.
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 guiding sheath and the sheath tube assembly 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 introducer sheath 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 "proximal" and the end farther from the user is designated as "distal".
The inventors have found that, when a stone is sucked by the sheath, the larger the gap between the sheath and the insertion portion is, the better the passage of the stone is, and the less likely the problem of uneven stone discharge occurs, whereas when the axis of the insertion portion is located on one side of the axis of the sheath, the size of the gap is larger, and when the axis of the insertion portion is collinear with the axis of the sheath, the size of the gap is smaller. In practice, however, the position of the insertion part within the sheath is not defined, and there is a portion of the insertion part located in the middle of the sheath, where the portion of the insertion part is coaxial with the sheath, which obviously results in a smaller gap and thus an unsmooth removal of the stone.
As shown in fig. 1 to 14, an embodiment of the present application discloses a sheath tube assembly of an introducer sheath, which includes a sheath tube 10, wherein a positioning space for accommodating an insertion portion 700 of at least part of an endoscope is provided in the sheath tube 10, that is, after the insertion portion 700 is inserted into the sheath tube 10, at least part of the insertion portion 700 can be accommodated in the positioning space, an axis of the positioning space is located on a first side of an axis of the sheath tube 10, and the other side of the axis of the sheath tube 10 is a second side opposite to the first side. The endoscope can be bronchoscope, nephroscope, esophagoscope, gastroscope, enteroscope, otoscope, nasoscope, stomatoscope, laryngoscope, colposcope, laparoscope, arthroscope and the like, and the type of the endoscope is not particularly limited in the embodiment of the application.
The sheath 10 is provided with a biasing structure capable of biasing the portion of the insertion portion 700 located in the positioning space in a first direction (a direction indicated by a y arrow line in fig. 10) extending from the second side to the first side.
In this embodiment, the sheath 10 has a positioning space, the axis of which is located on the first side of the axis of the sheath 10, that is, the positioning space is not located in the middle of the sheath 10, which can make the space in the sheath 10 located on the opposite side of the positioning space along the first direction have a larger size, and the space is the flowing space for the object to be sucked to pass through. Therefore, the insertion part 700 is disposed in the positioning space, so that the flow space on one side of the insertion part 700 has a larger size, thereby achieving the purpose of preventing blockage. In addition, in this embodiment, the sheath 10 is provided with a force application structure, and the force application structure can apply a force in the first direction to the insertion part 700, so that the insertion part 700 is kept in the positioning space, and the insertion part 700 is prevented from moving in the opposite direction to the first direction to occupy a part of the flow space located at one side of the positioning space, so that the insertion part 700 is ensured to be biased in the sheath 10, a larger size is reserved for the flow space, and the blocking is prevented.
Referring to fig. 3 to 6 and 9, in an alternative embodiment, the force applying structure includes a protrusion 500 protruding radially from the inner wall of the sheath 10, where the protrusion 500 has a certain rigidity, so that the protrusion 500 is not easily deformed during bending of the sheath 10, the protrusion 500 is connected to the sheath 10, and the protrusion 500 extends radially to the positioning space, so that the protrusion 500 contacts the insertion portion 700 located in the positioning space, and the insertion portion 700 is in a limit fit with the protrusion 500 in a direction opposite to the first direction.
The specific working process of this embodiment is as follows, the insertion portion 700 is inserted into the sheath 10, and at least part of the insertion portion 700 is located in the positioning space, at this time, the protrusion 500 contacts with the portion of the insertion portion 700 located in the positioning space, and the portion of the insertion portion 700 is in limit fit with the protrusion 500 in the opposite direction of the first direction, when the portion of the insertion portion 700 has a tendency to move in the opposite direction of the first direction, the protrusion 500 will stop and limit the portion of the insertion portion 700, and exert a reaction force in the first direction on the portion of the insertion portion 700, so as to limit the portion of the insertion portion 700 to move in the opposite direction of the first direction, thereby keeping the portion of the insertion portion 700 located in the positioning space and preventing the occurrence of blockage. In addition, the protruding portion 500 of the present embodiment further has a certain rigidity, which can promote the stability of the protruding portion 500 in stopping and limiting the portion of the insertion portion 700 located in the positioning space, so as to promote the anti-blocking effect.
Referring to fig. 10, in an alternative embodiment, the number of the protrusions 500 may be only one, or the protrusions 500 may include a first protrusion 510 and a second protrusion 520, and the first protrusion 510 and the second protrusion 520 may be respectively located at both sides of the sheath 10 in a second direction (a direction shown by an x arrow line in fig. 10), which is perpendicular to the first direction and the axial direction of the sheath 10, respectively. In this embodiment, the protruding portion 500 includes the first protruding portion 510 and the second protruding portion 520, and the first protruding portion 510 and the second protruding portion 520 each extend to the positioning space, that is, the first protruding portion 510 and the second protruding portion 520 each can limit the insertion portion 700, which can improve the limit stability of the protruding portion 500 on the insertion portion 700.
Referring to fig. 11, in an alternative embodiment, the first protrusion 510 and the second protrusion 520 each include an abutting region 501 capable of contacting the insertion portion 700, where the structures of the first protrusion 510 and the second protrusion 520 may be the same, and the abutting regions 501 of the first protrusion 510 and the abutting regions 501 of the second protrusion 520 are located on a side of the axis of the positioning space toward the second side, and are offset from each other along the second direction, where the abutting regions 501 of the first protrusion 510 and the abutting regions 501 of the second protrusion 520 are located.
In this embodiment, the abutting portion between the abutting region 501 of the first protrusion 510 and the insertion portion 700 is a first abutting portion, and the abutting portion between the abutting region 501 of the second protrusion 520 and the insertion portion 700 is a second abutting portion, and since the abutting region 501 of the first protrusion 510 and the abutting region 501 of the second protrusion 520 are offset in the second direction, the first abutting portion and the second abutting portion are also offset in the second direction, and compared with the embodiment in which the first abutting portion and the second abutting portion are disposed opposite to each other, the connecting line distance between the first abutting portion and the second abutting portion can be increased, so that the pipe diameter of the insertion portion 700 that can be limited by the protrusion 500 can be increased, so that the sheath tube assembly of this embodiment is adapted to the insertion portion 700 of a larger size. Of course, the contact region 501 of the first protruding portion 510 and the contact region 501 of the second protruding portion 520 may be disposed opposite to each other in the second direction, and there is no offset portion therebetween, which is not limited by the present application.
Referring to fig. 6, in an alternative embodiment, a portion of the sidewall of the sheath 10 is recessed inwardly to form a boss 500, for example, the boss 500 may be formed by stamping. In the present embodiment, the protruding portion 500 is formed by the sheath 10 itself, and the structure of the sheath 10 can be simplified compared to the embodiment in which the protruding portion 500 is formed by additionally providing the protruding structure on the inner wall of the sheath 10 (for example, welding a hollow or solid pipe on the inner wall of the sheath 10 to form the protruding portion 500).
Referring to fig. 5, in some embodiments, the protruding portion 500 includes a plurality of protruding segments spaced apart along the direction in which the distal end of the sheath 10 extends proximally, and a gap is formed between two adjacent protruding segments, where the protruding portion 500 has an interruption or discontinuity in the extending direction. When this embodiment is combined with an embodiment in which the boss 500 includes the first boss 510 and the second boss 520, each of the first boss 510 and the second boss 520 includes a plurality of boss sections.
And/or, in an alternative embodiment, the protrusion 500 extends continuously from the distal end of the sheath 10 to the proximal end (not shown in the figure) of the sheath 10, that is, there is no interruption or discontinuity in the direction in which the distal end of the sheath 10 extends proximally, so that the protrusion 500 always provides guidance for the insertion portion 700 during the insertion of the insertion portion 700 into the sheath 10, so that the insertion portion 700 is prevented from entering between the two adjacent protrusion sections, and the insertion portion 700 is prevented from being inserted further by the protrusion sections after entering between the two adjacent protrusion sections, and then the insertion portion 700 needs to be retracted a distance and then inserted further forward into the insertion portion 700, which increases the difficulty of inserting the insertion portion 700 into the sheath 10, so that the structure of the present embodiment can reduce the difficulty of inserting the insertion portion 700 into the sheath 10.
And/or referring to fig. 10, in an alternative embodiment, the boss 500 is provided with a through hole extending through the boss 500 in the axial direction of the sheath 10. In this embodiment, the protruding portion 500 is provided with a through hole, so that the through hole, that is, the internal space of the protruding portion 500, can be used to arrange components, such as the transmission rod 400 described below, so that the layout of the components in the sheath 10 can be optimized, and a larger layout space is reserved for the components in the sheath 10.
Referring to fig. 11, in an alternative embodiment, in the first direction, the minimum distance between the axis of the positioning space and the inner wall of the sheath 10 is D1, and the radius of the positioning space is R1, d1=r1. In this embodiment, the positioning space is a circular space, and since d1=r1, after at least part of the insertion portion 700 is inserted into the positioning space, the portion of the insertion portion 700 located in the positioning space is tangential to the inner wall of the sheath tube 10, that is, after the structure of this embodiment is adopted, the axis of the positioning space is far away from the axis of the sheath tube 10 as far as possible, so that the size of the flowing space is larger, and more space is reserved for waiting for suction of stones, so as to further prevent the occurrence of blockage. Of course, D1 may be greater than R1, which is not limited by the present application.
In some embodiments, the section of the sheath 10 that is proximal to the distal opening of itself is capable of bending following the active bending section 710 of the endoscope, with the first and second sides being adjacent to one side of the sheath 10 in the direction of bending of itself.
In an alternative embodiment, the section of the sheath 10 near the distal opening of the sheath can follow the active bending section 710 of the endoscope to bend, and the first side and the second side are respectively located on opposite sides of the sheath 10 along the bending direction of the sheath, so that the active bending section 710 is more beneficial to bend the section of the sheath 10 near the distal opening of the sheath.
In some embodiments, the sheath 10 includes a first tube segment 100 and a second tube segment 200, where the first tube segment 100 is used to accommodate the passive bending segment 720, and the second tube segment 200 is used to accommodate the active bending segment 710, where the first tube segment 100 and the second tube segment 200 are provided with the above-mentioned force application structure, that is, the force application structure can apply a force in a first direction to the active bending segment 710 and the passive bending segment 720, respectively, but since the distal end of the sheath 10 can bend following the active bending segment 710, i.e., the tube segment of the second tube segment 200 at least near the distal end opening thereof can bend following the active bending segment 710, the width of the distal end of the second tube segment 200 after bending itself becomes larger, so that the restraint of the active bending segment 710 by the force application structure will be weakened, which may cause the active bending segment 710 to move within the second tube segment 200, and a portion of the active bending segment 710 located in the middle of the second tube segment 200 causes a gap between the active bending segment 710 and the sheath 10 to be too small, thereby causing blockage.
For example, when the width of the second pipe section 200 is increased, the distance between the first protrusion 510 and the second protrusion 520 is increased, so that the restraint of the force application structure on the active bending section 710 is weakened, and the risk of the stone waiting for the suction object to be blocked in the second pipe section 200 is increased.
Referring to fig. 7-9, in order to reduce the risk of stones waiting for aspirant to clog the second tube segment 200, in an alternative embodiment, the sheath 10 includes a first tube segment 100 and a second tube segment 200, the proximal end of the second tube segment 200 is connected to the distal end of the first tube segment 100, and at least the tube segment of the second tube segment 200 that is proximal to the distal opening thereof is capable of following the active bending segment 710 of the endoscope, i.e., the distal end of the second tube segment 200 has a passive bending function, and the proximal end of the second tube segment 200 may or may not have a passive bending function, and a positioning space and a force application structure are provided in the first tube segment 100 for receiving at least a portion of the passive bending segment 720 of the insertion portion 700.
The second pipe section 200 is provided with an anti-clogging portion 210, the anti-clogging portion 210 has an expanded state, and when the anti-clogging portion 210 is in the expanded state, at least a portion of the anti-clogging portion 210 radially protrudes outside the other portion of the sheath 10, that is, in a direction extending from the inside of the anti-clogging portion 210 to the outside, at least a portion of the anti-clogging portion 210 protrudes outside the other portion of the sheath 10, and the flow-through area of the first lumen of the anti-clogging portion 210 is larger than the flow-through area of the second lumen of the other portion of the sheath 10. Specifically, the other portion of the sheath 10 refers to the portion of the sheath 10 outside the anti-clogging portion 210, and the other portion of the sheath 10 may be an equal-diameter pipe section, or the other portion of the sheath 10 may be an unequal-diameter pipe section, where at least part of the anti-clogging portion 210 protrudes radially outward from the maximum diameter of the unequal-diameter pipe section.
Alternatively, in the case where the anti-clogging portion 210 is in the expanded state, all regions of the anti-clogging portion 210 in the circumferential direction thereof are expanded outward, and all regions of the anti-clogging portion 210 in the circumferential direction thereof are radially protruded from other regions of the sheath 10, or in the case where the anti-clogging portion 210 is in the expanded state, a partial region of the anti-clogging portion 210 in the circumferential direction thereof is expanded outward, and a partial region of the anti-clogging portion 210 in the circumferential direction thereof is radially protruded from other regions of the sheath 10, and another partial region of the anti-clogging portion 210 in the circumferential direction thereof may be flush with other regions of the sheath 10.
In this embodiment, when the sheath 10 is inserted into a human body and it is necessary to aspirate a stone waiting for aspiration, the anti-clogging portion 210 is in an expanded state, then the insertion portion 700 of the endoscope is inserted into the sheath 10, the active bending section 710 of the insertion portion 700 drives at least part of the second tube section 200 to bend, a portion of the active bending section 710 is located in the middle of the second tube section 200, and then the portion of the active bending section 710 corresponds to the anti-clogging portion 210, which increases the size of the gap between the portion of the active bending section 710 and the second tube section 200, so that the stone waiting for aspiration can smoothly pass through the gap between the curved active bending section 710 and the inner wall of the tube section of the second tube section 200, in which the active bending section 710 is bent, thereby reducing the risk of clogging the stone waiting for aspiration in the second tube section 200.
The embodiment in which the portion of the active bending section 710 located in the middle of the second pipe section 200 corresponds to the anti-clogging portion 210 includes two kinds of:
1. After the insertion portion 700 of the endoscope is inserted into the sheath 10 and the active bending section 710 drives the sheath 10 to bend, the portion of the active bending section 710 located in the middle of the second tube section 200 corresponds to the anti-blocking portion 210, so that the stone waiting for suction can smoothly pass through the gap between the bent active bending section 710 and the inner wall of the tube section of the second tube section 200 bent by the active bending section 710, thereby reducing the risk of blocking the stone waiting for suction in the second tube section 200.
2. After the insertion portion 700 of the endoscope is inserted into the sheath 10 and the active bending section 710 bends the sheath 10, the portion of the active bending section 710 located in the middle of the second tube section 200 does not correspond to the anti-blocking portion 210, for example, the anti-blocking portion 210 is located near the portion of the active bending section 710, and only the active bending section 710 needs to be drawn at this time, so that the active bending section 710 moves toward the proximal end of the sheath 10 until a portion of the active bending section 710 is made to enter the anti-blocking portion 210, thereby introducing the object to be sucked, which is jammed between the bent second tube section 200 and the bent active bending section 710, into the anti-blocking portion 210, and reducing the risk of stones waiting for blocking the object to be sucked in the second tube section 200.
Referring to fig. 2 to 4 and fig. 7, in order to facilitate insertion of the sheath 10 into a human body, in an alternative embodiment, the anti-blocking portion 210 may further have a contracted state, and of course, the anti-blocking portion 210 may be in only one of the expanded states, that is, the anti-blocking portion 210 may be in the expanded state all the time, which is not limited by the present application, and the anti-blocking portion 210 may be switched between the expanded state and the contracted state, where at least a portion of the anti-blocking portion 210 is flush with or radially protrudes from other portions of the sheath 10, that is, in a direction extending from the outside to the inside of the anti-blocking portion 210, at least a portion of the anti-blocking portion 210 protrudes from other portions of the sheath 10, and the flow area of the first inner cavity is smaller than or equal to the flow area of the second inner cavity. Specifically, with the anti-clogging portion 210 in the contracted state, all portions of the anti-clogging portion 210 may be flush with or protrude radially inward from other portions of the sheath 10, or one portion of the anti-clogging portion 210 may be flush with other portions of the sheath 10, and another portion may protrude radially inward from other portions of the sheath 10.
The sheath assembly further includes a drive mechanism that is capable of switching the anti-clogging portion 210 from the contracted state to the expanded state.
In this embodiment, the anti-blocking portion 210 can be switched between the contracted state and the expanded state, and before the sheath 10 is inserted into the human body, the anti-blocking portion 210 can be switched to the contracted state, at least part of the anti-blocking portion 210 is flush with or radially protruding inward from other parts of the sheath 10, i.e. all parts of the anti-blocking portion 210 do not radially protrude outward from other parts of the sheath 10, so that the sheath 10 is convenient to be inserted into the human body.
In some embodiments, the anti-clogging portion 210 includes a deformable body 2111 and a deformation memory metal stent, the deformable body 2111 having a first lumen therein, the deformation memory metal stent being coupled to the deformable body 2111, the driving mechanism including a conductive wire electrically coupled to the deformation memory metal stent. When the deformation memory metal stent is not electrified through the wire, the deformation memory metal stent is in a contracted state so that the anti-blocking portion 210 is in a contracted state, and when the deformation memory metal stent is electrified through the wire, the deformation memory metal stent is in an expanded state so that the anti-blocking portion 210 is in an expanded state.
In other embodiments, the anti-jam portion 210 includes a flexible deformation body, and the drive mechanism includes a drive rod 400, the drive rod 400 being coupled to the distal end of the flexible deformation body, the drive rod 400 being movable between a third position and a fourth position to place the flexible deformation body in either an expanded state or a contracted state. For example, the direction of extension from the third position to the fourth position may be the direction of extension from the proximal end of the sheath 10 to the distal end, where the distal end of the flexible deformation body is closer to the proximal end of the flexible deformation body when the transmission rod 400 is in the third position, the transmission rod 400 is in the expanded state, and the transmission rod 400 drives the distal end of the flexible deformation body away from the proximal end of the flexible deformation body during the movement of the transmission rod 400 from the third position to the fourth position, thereby switching the flexible deformation body from the expanded state to the contracted state. Of course, the direction extending from the fourth position to the third position may be a direction extending from the proximal end to the distal end of the sheath 10.
In still other embodiments, the anti-blocking portion 210 is an elastic deformation, the anti-blocking portion 210 is in an expanded state in a natural state, the driving structure includes a constraining tube slidably sleeved outside the sheath 10, and the dislocation arrangement refers to that the constraining tube and the anti-blocking portion 210 are dislocation arranged in a radial direction of the constraining tube. In the case that the restraint tube is sleeved outside the anti-blocking portion 210, the anti-blocking portion 210 is elastically contracted to be in a contracted state, and in the case that the restraint tube is arranged in a staggered manner with the anti-blocking portion 210, the anti-blocking portion 210 is restored to be elastically deformed to be in an expanded state. It should be noted that, when the present embodiment is combined with the embodiment in which the sheath tube assembly includes the holder 300 described below, the holder 300 is a structural member having a certain rigidity and a certain bending property, such as an elongated rod, a wire, or the like, and the holder 300 is capable of preventing the distal end opening of the second tube segment 200 from moving in a direction approaching and/or moving away from the first tube segment 100.
In an alternative embodiment, the sheath 10 includes a first tube segment 100 and a second tube segment 200 that are sequentially disposed in a direction extending from the proximal end to the distal end thereof, that is, the distal end of the first tube segment 100 is connected to the proximal end of the second tube segment 200. Specifically, the proximal end of the sheath tube 10 may be fixedly connected to the distal end of the operating handle of the introducer sheath.
The sheath assembly further includes a holder 300, the first tube segment 100 being slidably coupled to the second tube segment 200, wherein the first tube segment 100 may be coupled to the inside or outside of the second tube segment 200, one of the distal end of the first tube segment 100 and the proximal end of the second tube segment 200 is provided with an anti-clogging portion 210, and one end of the holder 300 is connected to the second tube segment 200 and the other end is connected to an operating handle of the first tube segment 100 or the introducer sheath to fix the length of the sheath 10.
Since the anti-clogging portion 210 can be switched between the contracted state and the expanded state, and the length of the anti-clogging portion 210 itself is changed during the switching state, for example, when the anti-clogging portion 210 is switched from the contracted state to the expanded state, the anti-clogging portion 210 is radially expanded, but the length thereof is shortened. Therefore, when the connection between the first tube segment 100 and the second tube segment 200 is a fixed connection, the change in length of the anti-blocking portion 210 will cause the change in length of the sheath 10, which obviously causes the sheath 10 to approach or separate from the object to be aspirated, and thus causes the change in the relative position between the distal opening of the second tube segment 200 and the object to be aspirated.
After the structure of the embodiment of the present application is adopted, the anti-blocking portion 210 is disposed on the first tube segment 100 or the second tube segment 200, and the retainer 300 can fix the length of the sheath tube 10, but the length of the first tube segment 100 or the second tube segment 200 is changed due to the change of the anti-blocking portion 210, and the length of the sheath tube 10 is not changed, so in the embodiment of the present application, in order to compensate the length change of the first tube segment 100 or the second tube segment 200, the first tube segment 100 and the second tube segment 200 are slidably sleeved, so that the length change of the first tube segment 100 or the second tube segment 200 is compensated as the relative sliding of the distal end of the first tube segment 100 and the proximal end of the second tube segment 200, so as to ensure that the length of the sheath tube 10 is not changed.
Optionally, a sliding seal fit between the first tube segment 100 and the second tube segment 200, for example, a sealing structure (e.g., an O-ring) may be provided between the first tube segment 100 and the second tube segment 200 to prevent leakage of the aspirant out of the sheath 10 from the sliding fit between the first tube segment 100 and the second tube segment 200. The sheath assembly may also include a skin 600, the skin 600 being wrapped around the sheath 10.
The embodiment of the present application fixes the length of the sheath 10 by the holder 300, thus preventing the length of the sheath 10 from being changed when the anti-blocking portion 210 is expanded or contracted, thereby preventing the relative position between the distal end opening of the second tube segment 200 and the object to be sucked from being changed, and thus, the positions of the sheath 10 and the endoscope do not need to be adjusted to make the distal end opening of the sheath 10 face the object to be sucked, thereby simplifying the operation procedure.
Referring to fig. 1 to 9, in an alternative embodiment, the anti-blocking portion 210 is provided on the second pipe section 200, one end of the retainer 300 is connected to a distal end of the anti-blocking portion 210 or a portion of the second pipe section 200 located distal to the anti-blocking portion 210, the driving mechanism includes a transmission rod 400 capable of transmitting a pushing force, the transmission rod 400 is connected to a proximal end of the anti-blocking portion 210 or a portion of the second pipe section 200 located proximal to the anti-blocking portion 210, and the anti-blocking portion 210 is capable of switching from a contracted state to an expanded state when the transmission rod 400 receives the pushing force.
The specific operation of this embodiment is as follows, pushing the transmission rod 400, the transmission rod 400 can drive the proximal end of the anti-blocking portion 210 to move in the opposite direction of the second direction, so that the proximal end of the anti-blocking portion 210 is close to the distal end of the anti-blocking portion 210, the length of the anti-blocking portion 210 is compressed to generate radial expansion, during which the transmission rod 400 acts against the force of the second pipe segment 200 Shi Jiayan in the opposite direction, and the retainer 300 can resist the force to prevent the second pipe segment 200 from moving in the opposite direction of the second direction. After the transmission rod 400 is released, the anti-blocking portion 210 will recover to elastic deformation, and the proximal end of the anti-blocking portion 210 will gradually get away from the distal end of the anti-blocking portion 210, so that the anti-blocking portion 210 will return to the original length to switch to the contracted state, during this process, the anti-blocking portion 210 will not receive the force in the second direction, which not only can reduce the risk of changing the position retained by the second pipe segment 200, but also can make the retainer 300 not have a function of resisting the force in the second direction, for example, the retainer 300 may be a retaining rope, which may not have a certain stiffness, so that the structure of the retainer 300 may be simplified, and of course, the retainer 300 of the present embodiment may also have a certain stiffness, which is not limited by the present application.
In an alternative embodiment, at least a portion of the drive rod 400 is slidably disposed about the exterior of the holder 300. Alternatively, the transmission rod 400 may be disposed inside the sheath tube 10 or outside the sheath tube 10, which is not limited by the present application, so that the ability of the retainer 300 to maintain its own form can be used to limit bending deformation of the transmission rod 400 when pushed during pushing the transmission rod 400, thereby enabling the transmission rod 400 to stably transmit the pushing force to stably switch the anti-clogging portion 210 to the expanded state.
Referring to fig. 12 to 14, in an alternative embodiment, the joint between the retainer 300 and the second tube segment 200 is a first joint, and in the case that the anti-blocking portion 210 is in the expanded state, the transmission rod 400 is in limited contact with the first joint in a direction extending from the proximal end to the distal end of the sheath 10, so that the transmission rod 400 is prevented from moving too much in the opposite direction of the second direction, and further, the anti-blocking portion 210 is prevented from being compressed too much axially to affect the elastic performance of the anti-blocking portion 210, and the proximal end of the anti-blocking portion 210 is prevented from moving too much in the opposite direction of the second direction along with the transmission rod 400 to be out of engagement with the first tube segment 100. Moreover, the present embodiment utilizes the joint between the retainer 300 and the second tube segment 200 to limit the driving rod 400, so that no additional limiting structure is required to limit the proximal end of the driving rod 400 or the anti-blocking portion 210, which can simplify the structure of the sheath assembly.
Referring to fig. 2 to 4, in an alternative embodiment, in the case where the anti-blocking portion 210 is in the contracted state, a portion of the anti-blocking portion 210 is sleeved inside the first pipe section 100 or the second pipe section 200, that is, when the anti-blocking portion 210 is disposed on the first pipe section 100, a distal end of the anti-blocking portion 210 is sleeved inside the second pipe section 200, and when the anti-blocking portion 210 is disposed on the second pipe section 200, a proximal end of the anti-blocking portion 210 is sleeved inside the first pipe section 100. The present embodiment can limit the radial expansion of the portion of the anti-clogging portion 210 by using the first tube segment 100 or the second tube segment 200, so that even if the reaction force in the second direction applied to the sheath 10 by the human tissue is applied to the sheath assembly when the sheath assembly is inserted into the human body, the first tube segment 100 or the second tube segment 200 can prevent the anti-clogging portion 210 from expanding under the reaction force, that is, with the structure of the present embodiment, the anti-clogging portion 210 can be prevented from expanding when the contracted state is required to be maintained, so as to facilitate insertion of the sheath assembly into the human body.
In a further embodiment, one of the first pipe section 100 and the second pipe section 200 that can be sleeved outside the anti-blocking portion 210 is provided with a deformation notch 111, the deformation notch 111 penetrates through the side wall of the first pipe section 100 or the second pipe section 200, and the deformation notch 111 extends to the end surface of the first pipe section 100 or the second pipe section 200 close to the anti-blocking portion 210.
In this embodiment, one of the first pipe section 100 and the second pipe section 200, which can be sleeved outside the anti-blocking portion 210, is provided with a deformation notch 111, which can reduce the rigidity of the first pipe section 100 or the second pipe section 200, so that when the portion of the anti-blocking portion 210 sleeved inside the first pipe section 100 or the second pipe section 200 gradually becomes out of the sleeve connection with the first pipe section 100 or the second pipe section 200, the first pipe section 100 or the second pipe section 200 can be radially deformed under the radial expansion force of the anti-blocking portion 210, which can expand the portion of the anti-blocking portion 210 positioned inside the first pipe section 100 or the second pipe section 200 outwards, and thus the occurrence of abrupt switching of the anti-blocking portion 210 from the expanded state to the contracted state at the pipe orifice of the first pipe section 100 or the second pipe section 200 can be prevented, so as to reduce the risk of damage to the anti-blocking portion 210.
Optionally, one of the first pipe section 100 and the second pipe section 200 that can be sleeved outside the anti-blocking portion 210 includes a sleeve portion 110, and when the anti-blocking portion 210 is in a contracted state, a portion of the anti-blocking portion 210 is sleeved inside the sleeve portion 110, and the sleeve portion 110 is provided with the deformation notch 111. Taking the example that the sleeve joint portion 110 is disposed at the distal end of the first tube segment 100, the inner hole size of the sleeve joint portion 110 is larger than the inner hole size of the portion of the first tube segment 100 located outside the sleeve joint portion 110, so that a step is formed at the proximal end of the sleeve joint portion 110, and the step can stop and limit the second tube segment 200 in the direction extending from the distal end to the proximal end of the sheath tube 10.
Optionally, the anti-blocking portion 210 includes a main body portion 211 and a mounting ring 212, where the main body portion 211 can expand radially, and the main body portion 211 may include a deformable body 2111 and an elastic support 2112, for example, the main body portion 211 is a stent graft, and both ends of the main body portion 211 are provided with the mounting ring 212, and the mounting ring 212 is slidably engaged with the socket portion 110.
The embodiment of the application also discloses an introducer sheath, which comprises the sheath tube assembly in any embodiment, so that the introducer sheath has the beneficial effects of the sheath tube assembly, and the description is omitted here. Optionally, the introducer sheath further comprises an operating handle (not shown), the proximal end of the sheath 10 being connected to the distal end of the operating handle.
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 (9)
1. A sheath assembly of an introducer sheath, comprising a sheath (10), the sheath (10) having a positioning space therein for receiving an insertion portion (700) of at least part of an endoscope, an axis of the positioning space being located on a first side of an axis of the sheath (10), the other side of the axis of the sheath (10) being a second side opposite to the first side;
The sheath tube (10) is provided with a force application structure capable of applying a force in a first direction to a portion of the insertion portion (700) located in the positioning space, wherein the first direction is a direction extending from the second side to the first side;
The sheath tube (10) comprises a first tube section (100) and a second tube section (200), wherein the proximal end of the second tube section (200) is connected with the distal end of the first tube section (100), at least the tube section of the second tube section (200) close to the distal end opening of the second tube section can be bent along with an active bending section (710) of the endoscope, the positioning space and the force application structure are both arranged on the first tube section (100), and the positioning space is used for accommodating at least part of a passive bending section (720) of the insertion part (700);
The second pipe section (200) is provided with an anti-blocking portion (210), the anti-blocking portion (210) has an expansion state, and in the case that the anti-blocking portion (210) is in the expansion state, at least part of the anti-blocking portion (210) radially protrudes outwards from other parts of the sheath pipe (10), and the flow area of a first inner cavity of the anti-blocking portion (210) is larger than that of a second inner cavity of other parts of the sheath pipe (10).
2. The sheath assembly according to claim 1, wherein the force applying structure comprises a protrusion (500) protruding radially from an inner wall of the sheath (10), the protrusion (500) being connected to the sheath (10), the protrusion (500) extending radially to the positioning space such that the protrusion (500) is in contact with the insert (700) located in the positioning space and such that the insert (700) is in a positive fit with the protrusion (500) in a direction opposite to the first direction.
3. The sheath assembly according to claim 2, wherein the boss (500) comprises a first boss (510) and a second boss (520), the first boss (510) and the second boss (520) being located on respective sides of the sheath (10) in a second direction perpendicular to the first direction and an axial direction of the sheath (10), respectively.
4. A sheath assembly according to claim 3, wherein the first protrusion (510) and the second protrusion (520) each comprise an abutment region (501) capable of contacting the insertion portion (700), the abutment region (501) of the first protrusion (510) and the abutment region (501) of the second protrusion (520) are both located on a side of the axis of the positioning space towards the second side, and the abutment region (501) of the first protrusion (510) and the abutment region (501) of the second protrusion (520) are arranged in a staggered manner along the second direction.
5. The sheath assembly according to any one of claims 2 to 4, wherein a partial region of the side wall of the sheath (10) is recessed inwardly to form the boss (500), and/or,
The boss (500) extends continuously from the distal end of the sheath (10) to the proximal end of the sheath (10), and/or,
The protruding portion (500) is provided with a penetrating hole, and the penetrating hole penetrates through the protruding portion (500) along the axial direction of the sheath tube (10).
6. The sheath assembly according to any one of claims 1 to 4, characterized in that in the first direction the minimum distance between the axis of the positioning space and the inner wall of the sheath (10) is D1, the radius of the positioning space is R1, d1=r1.
7. The sheath assembly according to any one of claims 1 to 4, wherein a tube section of the sheath (10) adjacent to the distal opening thereof is bendable following an active bending section (710) of an endoscope, the first side and the second side being located on opposite sides of the sheath (10) in the direction of bending thereof.
8. The sheath assembly according to any one of claims 1 to 4, the anti-clogging portion (210) further having a contracted state, the anti-clogging portion (210) being switchable between the expanded state and the contracted state, with the anti-clogging portion (210) in the contracted state, at least part of the anti-clogging portion (210) being flush with or protruding radially inwardly from other parts of the sheath (10), an excess flow area of the first lumen being less than or equal to an excess flow area of the second lumen;
the sheath assembly further includes a drive mechanism capable of switching the anti-clogging portion (210) from the contracted state to the expanded state.
9. An introducer sheath comprising the sheath assembly of any one of claims 1 to 8.
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| CN202411339106.4A CN118873189B (en) | 2024-09-25 | 2024-09-25 | Introducer sheath and sheath tube assembly |
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| CN202411339106.4A CN118873189B (en) | 2024-09-25 | 2024-09-25 | Introducer sheath and sheath tube assembly |
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| CN119214580B (en) * | 2024-12-04 | 2025-03-25 | 湖南省华芯医疗器械有限公司 | A guide sheath and sheath tube assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366712A (en) * | 2016-02-05 | 2018-08-03 | 捷锐士阿希迈公司(以奥林巴斯美国外科技术名义) | The endoscopic system of features is kept including drop |
| CN115969295A (en) * | 2023-01-31 | 2023-04-18 | 湖南省华芯医疗器械有限公司 | Rigidity adjusting mechanism of endoscope composite insertion part and endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070027466A1 (en) * | 2005-07-28 | 2007-02-01 | Ethicon Endo-Surgery, Inc. | Electroactive polymer-based tissue apposition device and methods of use |
| CN112089483A (en) * | 2020-10-10 | 2020-12-18 | 南通伊诺精密塑胶导管有限公司 | Ureter guide sheath |
| CN118000851A (en) * | 2024-02-26 | 2024-05-10 | 湖南省华芯医疗器械有限公司 | Leading-in end, endoscope assembly and imbedding device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366712A (en) * | 2016-02-05 | 2018-08-03 | 捷锐士阿希迈公司(以奥林巴斯美国外科技术名义) | The endoscopic system of features is kept including drop |
| CN115969295A (en) * | 2023-01-31 | 2023-04-18 | 湖南省华芯医疗器械有限公司 | Rigidity adjusting mechanism of endoscope composite insertion part and endoscope |
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