CN110742676A

CN110742676A - Integrated stone-taking net basket, manufacturing process thereof and stone-taking net basket instrument

Info

Publication number: CN110742676A
Application number: CN201911052074.9A
Authority: CN
Inventors: 夏天; 谢洪涛; 何占元
Original assignee: CHANGZHOU HEALTH MICROPORT MEDICAL DEVICE Co Ltd
Current assignee: CHANGZHOU HEALTH MICROPORT MEDICAL DEVICE Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-02-04

Abstract

The invention discloses an integrated stone-taking net basket, a manufacturing process thereof and a stone-taking net basket instrument, which comprises a base body integrally made of shape memory alloy materials, wherein the base body comprises a furling part and a net basket part, the furling part forms the tail end of the base body, the net basket part comprises at least three net basket strips, two adjacent net basket strips are arranged in the circumferential direction at intervals to form a base body interval area, the head end parts of the net basket strips are connected to form the head end of the base body, and the tail end parts of the net basket strips are connected with the furling part. The endoscope can be used with an endoscope with a smaller channel, and the trauma to a patient in the operation is reduced.

Description

Integrated stone-taking net basket, manufacturing process thereof and stone-taking net basket instrument

Technical Field

The invention relates to an integrated stone-taking net basket, a manufacturing process thereof and a stone-taking net basket apparatus.

Background

At present, the structures of the baskets of the common stone-taking basket apparatus in the existing market are generally two types: the first structure is as follows: one ends of the plurality of basket wires are connected and fixed through a connecting piece (a guide head); the second structure is: adopting a net basket without a head; however, the structures of the two baskets are limited by the size of the head, the baskets cannot enter the cavity with the diameter less than 0.6mm after being contracted, and the baskets which are used by the endoscope with smaller channels cannot be manufactured by adopting the structures of the two modes.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an integrated calculus removing basket which can be used with an endoscope with a smaller channel and reduce the trauma to a patient in an operation.

In order to solve the technical problems, the technical scheme of the invention is as follows: an integral calculus removing basket comprising a base integrally formed of a shape memory alloy material, said base comprising:

forming a furling part of the tail end of the base body;

the net basket part comprises at least three net basket strips, every two adjacent net basket strips are arranged in the circumferential direction at intervals to form a matrix interval area, the head end parts of the net basket strips are connected to form the head end of the matrix, and the tail end parts of the net basket strips are connected with the furling part.

Furthermore, the head end part of the basket strips is provided with a connecting part, the connecting part comprises two connecting strips which are arranged at intervals to form a connecting sub-region, and the two connecting strips which lean against each other between the two adjacent basket strips are connected.

Further, in order to ensure that the net basket part can be contracted to be smaller when being contracted, and the hand feeling (resistance) is relaxed when the net basket part is contracted into the tubular body, the connecting part where the two connecting sub-strips which are close to each other between the two adjacent net basket strips are connected forms a turning part, and all the turning parts are not connected so as to ensure that the connecting sub-regions are communicated.

Further, the basal body is made of nickel-titanium alloy material.

In order to prepare the integrated calculus removing basket, the invention also provides a manufacturing process of the integrated calculus removing basket, which comprises the following steps:

cutting a pipe made of a shape memory alloy material to form an integral stone-taking basket structure before expanding and unfolding;

and opening the cut pipe to be in a required shape by using a tool, and heating and shaping to obtain the required integrated stone-taking basket.

Further, cutting a tube made of a shape memory alloy material specifically includes:

passing the tube through a mandrel;

and cutting the pipe with the core rod by adopting laser in the circumferential rotation process to remove the material of the substrate interval area on the pipe or the material of the substrate interval area and the connection subarea on the pipe.

The invention also provides a stone-taking basket apparatus which comprises the integrated stone-taking basket.

Further, the stone basket apparatus further comprises:

a traction assembly connected to the gathering portion;

a fixed component connected with the traction assembly;

a tubular body partially or totally slidingly disposed on said traction assembly;

the pushing device is arranged on the fixed part and connected with the tubular body so as to act to drive the tubular body to move, and at least comprises a basket releasing position and a basket restraining position in the moving process; wherein the content of the first and second substances,

when the tubular body is in the basket restraining position, the basket portion is restrained within the head end portion of the tubular body;

when the tubular body is in the basket release position, the basket portion disengages from the head end of the tubular body to allow the basket portion to self-expand.

Further, the fixing member includes:

an operating handle;

and the locking assembly is used for locking and connecting the traction assembly to the operating handle.

The locking assembly includes:

the clamping head is arranged in the operating handle and is suitable for deforming under stress, and the traction assembly penetrates through the clamping head;

a rear locking member connected to the chuck and threadedly connected to the operating handle; wherein the content of the first and second substances,

the rear locking member is adapted to be screwed to urge the collet to move axially, the collet being adapted to deform to grip or release the pulling assembly during axial movement.

Further, in order to enable the collet to be pushed to deform under the action of the operating handle during the axial movement of the rear locking member, a conical surface matching mechanism which is suitable for restraining the collet to deform during the axial movement of the collet is arranged between the operating handle and the collet.

Further, the pushing means comprises:

the push rod is arranged on the fixing component in a sliding manner;

the front locking nut is connected to the push rod through threads, and the tail end of the tubular body is in crimping connection between the front locking nut and the push rod.

After the technical scheme is adopted, the mesh basket base body is of an integrated structure and is formed by laser cutting, the size can be made small, and the mesh basket can conveniently enter a tube cavity with a smaller diameter (the diameter is smaller than 0.6 mm), so that the mesh basket base body is favorably matched with an endoscope with a smaller channel for use, and the wound to a patient in an operation is reduced.

Drawings

Fig. 1 is a perspective view of a three-petal integrated stone-taking basket before sizing in an embodiment of the invention;

fig. 2 is a perspective view of a shaped three-petal integrated stone-taking basket according to a first embodiment of the invention;

fig. 3 is a perspective view of a four-petal integrated stone-taking basket before sizing according to an embodiment of the invention;

fig. 4 is a perspective view of a shaped four-petal integrated stone-taking basket according to a first embodiment of the invention;

FIG. 5 is a perspective view of a stone basket apparatus according to a second embodiment of the present invention;

FIG. 6 is a cross-sectional view of the stone basket apparatus according to a second embodiment of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 6;

fig. 8 is an enlarged view of a portion B in fig. 6.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Example one

As shown in fig. 1 to 4, an integral type calculus removing basket comprises a base body 1 integrally made of a shape memory alloy material, wherein the base body 1 comprises:

a furling part 11 forming the tail end of the base body;

the net basket part 12, the net basket part 12 includes at least three net basket strips 12a, two adjacent net basket strips 12a are arranged at intervals in the circumferential direction to form a base body interval area 12b, the head end parts of the net basket strips 12a are connected to form the head end of the base body, and the tail end parts of the net basket strips 12a are connected to the furling part 11.

The basket base body of the invention is of an integrated structure and can be formed by laser cutting, the size can be made very small, and the basket base body can conveniently enter a tube cavity with smaller diameter (the diameter is less than 0.6 mm), thereby being beneficial to being matched with an endoscope with smaller channels for use and reducing the wound to a patient in an operation.

In the present embodiment, as shown in fig. 1-2, the basket part 12 includes three basket strips 12a to form a three-petal integrated stone-taking basket; as shown in fig. 3 to 4, the basket part 12 includes four basket strips 12a to form a four-petal integrated stone-taking basket; it should be noted that: the number of the basket strips 12a is not limited to three or four.

As shown in fig. 1 to 4, a connecting portion is disposed at a head end of the basket strips 12a, the connecting portion includes two connecting strips 12d arranged at intervals to form a connecting sub-region 12c, and the two connecting strips 12d adjacent to each other between the two adjacent basket strips 12a are connected.

Specifically, the corner portions 12e are formed at the connection positions where the two connection sub-strips 12d adjacent to each other between the two adjacent basket strips 12a are connected, and all the corner portions 12e are not connected to communicate the connection sub-zones 12 c. In this arrangement, the basket part 12 can be contracted to a smaller extent so as to be contracted into the tubular body 2 with a smaller resistance, thereby facilitating the operation.

In the present embodiment, the substrate 1 includes but is not limited to being made of nitinol.

The manufacturing process of the integrated stone-taking net basket comprises the following steps:

cutting a pipe made of a shape memory alloy material to form a structure of the integrated calculus removing basket before unexpanded expansion (contraction);

Cutting a tube made of a shape memory alloy material specifically includes:

passing the tube through a mandrel;

and cutting the pipe with the core rod by adopting laser in the circumferential rotation process to remove the material of the substrate interval region 12b on the pipe or the material of the substrate interval region 12b and the connecting sub-region 12c on the pipe.

The manufacturing process further comprises the following steps: the tube is cut so that the gather portion 11 has a predetermined length.

Example two

As shown in figures 5-8, a stone extraction basket apparatus comprises an integrated stone extraction basket according to the first embodiment.

Specifically, as shown in fig. 5 to 8, the stone basket apparatus further comprises:

a pulling assembly 50 connected to the gathering portion 11;

a fixed component connected to the traction assembly 50;

a tubular body 2 partially or totally slidingly arranged on said traction assembly 50;

a pushing device mounted on the fixed part and connected with the tubular body 2 to act to drive the tubular body 2 to move and at least having a basket releasing position and a basket restraining position in the moving process; wherein the content of the first and second substances,

when the tubular body 2 is in the basket restraining position, the basket portion 12 is restrained within the head end of the tubular body 2;

when the tubular body 2 is in the basket release position, the basket portion 12 is disengaged from the head end of the tubular body 2 to allow the basket portion 12 to self-expand.

The pulling assembly 50 may be a superelastic stainless steel wire or a nitinol wire.

The connection of the pulling assembly 50 to the gathering portion 11 may be by welding or crimping.

The tubular body 2 may be an ultra-thin-walled tube made of a material having both hardness and toughness, such as a composite woven mesh tube, a PA tube, a PI tube, or the like.

In this embodiment, the tubular body 2 is slidably sleeved outside the pulling assembly 50 and is axially movable to shift between a basket restraining position and a basket releasing position, wherein the basket part 12 is gradually released from the head end of the tubular body 2 when the tubular body 2 moves from the basket restraining position to the basket releasing position, and the basket part 12 is gradually restrained inside the tubular body 2 when the tubular body 2 moves from the basket releasing position to the basket restraining position.

As shown in fig. 5 and 6, the fixing member includes:

an operating handle 31;

a locking assembly for locking the tow assembly 50 to the operating handle 31.

Specifically, as shown in fig. 8, the locking assembly includes:

a collet 32 disposed within the operating handle 31 and adapted to deform under force, the pulling assembly 50 passing through the collet 32;

a rear locking member 33 coupled to the collet 32 and threadedly coupled to the operating handle 31; wherein the content of the first and second substances,

the rear lock 33 is adapted to be screwed to push the collet 32 to move axially, and the collet 32 is adapted to be deformed to grip or release the pulling assembly 50 during the axial movement.

A taper fitting mechanism adapted to restrain the collet 32 to deform during axial movement of the collet 32 is provided between the operating handle 31 and the collet 32. The deformation of the collet 32 is constrained by a taper fit mechanism during the action of the rear locking member 33.

Specifically, the pushing device includes:

the push rod 41 is arranged on the fixing component in a sliding mode;

a front lock nut 42, wherein the front lock nut 42 is connected to the push rod 41 by a thread, and the rear end of the tubular body 2 is pressed between the front lock nut 42 and the push rod 41.

In the present embodiment, by screwing the front lock nut 42, the rear end portion of the tubular body 2 is crimped between the front lock nut 42 and the push rod 41.

Specifically, a push button 41a may be provided on the push rod 41, and the push rod 41 is pushed by the push button 41 a; the operating handle 31 is also provided with a fixed handle 31a for easy operation.

The action process of the instrument is as follows:

the push button 41a is pushed forward to withdraw the basket part 12 into the cavity of the tubular body 2, then the push button 41a is inserted into the rear side of the calculus or the foreign matter through the channel of the endoscope, the push button 41a is pulled backward to open the basket part 12 and then the calculus or the foreign matter is collected, then the push button 41a is pushed forward gently to recover the basket part 12 and collect the calculus or the foreign matter, and then the calculus or the foreign matter is withdrawn slowly.

The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims

1. An integral type calculus extraction basket, characterized in that it comprises a base body (1) made of shape memory alloy material in one piece, said base body (1) comprising:

a furling part (11) forming the tail end of the base body;

the net basket part (12), the net basket part (12) includes at least three net basket strips (12 a), two adjacent net basket strips (12 a) are arranged at intervals in the circumferential direction to form a matrix interval area (12 b), the head end parts of the net basket strips (12 a) are connected to form the head end of the matrix, and the tail end parts of the net basket strips (12 a) are connected with the furling part (11).

2. The one-piece stone extraction basket according to claim 1,

the head end part of the basket strip (12 a) is provided with a connecting part, the connecting part comprises two connecting sub-strips (12 d) which are arranged at intervals to form a connecting sub-area (12 c), and the two connecting sub-strips (12 d) leaning against each other between the two adjacent basket strips (12 a) are connected.

3. The one-piece stone extraction basket according to claim 2,

and a corner part (12 e) is formed at the connecting part of the two connecting sub-strips (12 d) which are close to each other between the two adjacent net basket strips (12 a), and all the corner parts (12 e) are not connected so as to enable the connecting sub-regions (12 c) to be communicated.

4. The one-piece stone extraction basket according to claim 1,

the base body (1) is made of nickel-titanium alloy materials.

5. The manufacturing process of the integrated stone-taking basket is characterized by comprising the following steps:

cutting a tube made of a shape memory alloy material to form a structure of the one-piece calculus removing basket according to any one of claims 1 to 4 before unexpanded expanding;

6. The manufacturing process of claim 5, wherein:

cutting a tube made of a shape memory alloy material specifically includes:

passing the tube through a mandrel;

and in the circumferential rotation process of the pipe with the mandril, cutting by adopting laser to remove the material of the substrate spacing area (12 b) on the pipe or the material of the substrate spacing area (12 b) and the connecting sub-area (12 c) on the pipe.

7. A stone basket apparatus comprising an integral stone basket as claimed in any one of claims 1 to 4.

8. The stone basket apparatus of claim 7 further comprising:

a traction assembly (50) connected to the gathering portion (11);

a fixed component connected with the traction assembly (50);

a tubular body (2) partially or totally slidingly arranged on said traction assembly (50);

the pushing device is arranged on the fixed part and connected with the tubular body (2) to be actuated to drive the tubular body (2) to move, and at least comprises a basket releasing position and a basket restraining position in the moving process; wherein the content of the first and second substances,

-the basket portion (12) is constrained within the head end of the tubular body (2) when the tubular body (2) is in the basket constraining position;

when the tubular body (2) is in the basket release position, the basket portion (12) is disengaged from the head end of the tubular body (2) to allow the basket portion (12) to self-expand.

9. The stone basket apparatus of claim 8 wherein the securing member comprises:

an operating handle (31);

a locking assembly for locking the tow assembly (50) to the operating handle (31).

10. The stone extraction basket apparatus of claim 9, wherein the locking assembly comprises:

a collet (32) disposed within the operating handle (31) and adapted to deform under force, the pulling assembly (50) passing through the collet (32);

a rear locking member (33) connected to the chuck (32) and screwed to the operating handle (31); wherein the content of the first and second substances,

the rear locking member (33) is adapted to be screwed to push the collet (32) to move axially, and the collet (32) is adapted to be deformed to clamp or unclamp the pulling assembly (50) during the axial movement.

11. The stone basket apparatus of claim 10,

a conical surface matching mechanism which is suitable for restraining the chuck (32) to deform during the axial movement of the chuck (32) is arranged between the operating handle (31) and the chuck (32).

12. The stone basket apparatus of claim 8 wherein the pushing means comprises:

the push rod (41), the said push rod (41) is set in the said fixed assembly slidably;

the front locking nut (42) is connected to the push rod (41) through threads, and the tail end of the tubular body (2) is in crimping connection between the front locking nut (42) and the push rod (41).