CN109984816B

CN109984816B - Coreless puncture outfit

Info

Publication number: CN109984816B
Application number: CN201711499515.0A
Authority: CN
Inventors: 孙宝峰; 马猛
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2017-12-31
Filing date: 2017-12-31
Publication date: 2024-06-04
Anticipated expiration: 2037-12-31
Also published as: CN109984816A

Abstract

The invention discloses a coreless puncture device, which comprises a sleeve, a puncture element and a puncture guide piece, wherein the sleeve comprises a limiting piece, the puncture element is provided with a connecting structure, and the limiting piece is matched with the connecting structure so as to movably connect the sleeve with the puncture element; the movement causes the piercing guide to extend and retract from the forward end of the piercing element. The puncture element of the coreless puncture device does not need to rotate in use, so that inconvenience brought to the coreless puncture device in use due to inflexible rotation of the puncture element during insertion of an instrument and extraction of the coreless puncture device is avoided, and the coreless puncture device is also smoother to extract. The end of the piercing element need not be sharp or pointed.

Description

Coreless puncture outfit

Technical Field

The invention relates to a coreless puncture outfit, belonging to the field of medical appliances.

Background

The puncture outfit can establish an access channel for minimally invasive surgical instruments to access the abdominal cavity, and simultaneously provide a gas channel to establish a gas environment in the abdominal cavity for examination or surgical operation.

The coreless puncture device and the coreless puncture device both comprise a sealing component and a sleeve, and the sealing component with the same structure and the same connection mode between the sealing component and the sleeve can be applied to the coreless puncture device and the coreless puncture device. The sealing assembly of the coreless penetration apparatus and the manner in which the sealing assembly is connected to the cannula of the present application are described in previously filed patent application documents by the present inventors, including CN201710216813.8, CN201710216814.2 and CN201710299930.5.

The present inventors have previously filed several patent applications concerning coreless penetrators, such as CN106333734A, CN106377302a and CN106333733 a. First, in the previous solutions, the piercing elements of the coreless piercer need to be rotated relative to the cannula, thereby adversely affecting the performance of the coreless piercer. Secondly, to avoid the above problems, the piercing element and the cannula may be fixed relatively, but in this case, the end of the piercing element needs to be sharp or pointed to facilitate piercing, and after entering the abdominal cavity, the sharp or pointed end may cause undesired damage to the tissue. The above problems need to be solved simultaneously.

Disclosure of Invention

The present inventors propose a new coreless puncture device.

A coreless penetration assembly comprising a cannula, a penetrating member and a penetrating guide, the cannula comprising a limiter, the penetrating member having a connecting structure, the limiter cooperating with the connecting structure to movably connect the cannula with the penetrating member; the movement causes the piercing guide to extend and retract from the forward end of the piercing element.

The sleeve comprises a matching part and a sleeve body; the matching part and the pipe body are integrally formed or connected with each other; the inner wall of the matching part and the inner wall of the pipe body jointly form a channel for the instrument to pass through; the matching part comprises a limiting piece; the puncture guide is provided to the mating portion.

The walls of the mating portion receive and secure the piercing guide.

The cooperation portion includes upper portion and lower part, upper portion is used for supplying the spring cover to establish, the locating part is formed in the wall of lower part.

The outer circumferential radial dimension of the mating portion is smaller than the outer circumferential radial dimension of the pipe body.

The limiting piece comprises an axial portion and a radial portion.

Both sides of the axial part are through grooves; the radial part is approximately perpendicular to the axial part and extends outwards, and the end face of the radial part is an inclined plane or a curved surface.

The piercing element includes a piercing portion including an end; the penetrating member defines a first passageway for passage of an instrument and a second passageway having an opening at the end. The connecting structure may be located at the piercing portion or at other portions of the piercing element than the piercing portion.

The connecting structure is a through groove, and the through groove penetrates through the wall of the puncture element.

The puncture part is in a nib shape.

The inner wall of the piercing element has a blocking structure.

The connecting structure is a through groove, and the through groove penetrates through the wall of the puncture element; the upper surface of the blocking structure is flush with the bottom surface of the through groove or the upper surface is positioned between the bottom surface and the top surface of the through groove.

The other opening of the second channel is located on the upper surface of the blocking structure.

The cannula and the inner wall of the penetrating member together form a passageway for the passage of an instrument.

The piercing guide is a needle.

The puncture element does not need to rotate in use, so that inconvenience brought to the coreless puncture device in use due to inflexible rotation of the puncture element during insertion of an instrument and extraction of the puncture device is avoided, and the coreless puncture device is also smoother to extract. The end of the piercing element need not be sharp or pointed.

Drawings

FIG. 1 shows the coreless penetrating device without the needle;

FIG. 2 shows the coreless penetrating device after needle removal;

FIG. 3 is a piercing element;

FIG. 4 is a top view of the lancing element;

FIG. 5 is an exploded view of the coreless punch;

FIG. 6 is a coreless penetrating device without a penetrating member assembled;

fig. 7 is a section of the sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings.

The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1, coreless punch 100 includes cannula 2 and piercing element 1.

As shown in fig. 5, the sleeve 2 is a hollow tube including a fitting portion 22, a tube body 21, and an end portion. The end of the sleeve 2 is connected to the seal assembly 3 and is selectively sealed by the seal assembly 3. The structure of the sealing assembly 3 and the connection manner of the sealing assembly 3 and the sleeve 2 are described in patent application documents filed by the inventor before, including CN201710216813.8, CN201710216814.2 and CN201710299930.5, and are not described in detail herein. The outer circumferential radial dimension of the mating portion 22 is smaller than the outer circumferential radial dimension of the tube body 21, i.e. the outer edge dimension of the first orthographic projection of the tube body 21 on a plane perpendicular to the central axis of the sleeve 2 is larger than the outer edge dimension of the second orthographic projection of the mating portion 22 on a plane perpendicular to the central axis of the sleeve 2, the first orthographic projection completely covering the second orthographic projection. The cylindrical inner wall of the fitting portion 22 is coaxial with the cylindrical inner wall of the pipe body 21, which is the central axis of the sleeve 2, and the inner diameter of the fitting portion 22 is equal to the inner diameter of the pipe body 21. The fitting portion 22 includes an upper end, an upper portion, a lower portion, and a lower end in this order from top to bottom. The upper part of the matching part 22 is used for the spring 4 to be sleeved. The upper end of the fitting portion 22 is integrally formed with or connected to the pipe body 21, and the outer peripheral surface of the lower portion of the fitting portion 22 has an arc-shaped protrusion 23. The outer surface of the arc-shaped protrusion 23 is smoothly connected to a portion of the outer peripheral surface of the lower portion of the fitting portion 22 other than the arc-shaped protrusion 23, and the outer surface of the arc-shaped protrusion 23 refers to a surface of the arc-shaped protrusion 23 parallel to the central axis of the sleeve 2. The arc-shaped protrusion 23 is provided with a blind hole with a downward opening, and one end of the needle 24 is accommodated and fixed in the blind hole, and particularly, an interference fit mode can be adopted. The other end of the needle 24 is pointed. The second orthographic projection includes an orthographic projection of an upper portion of the mating portion 22 and an orthographic projection of a lower portion of the mating portion 22, the orthographic projection of the upper portion is circular, and an inner portion of the orthographic projection of the lower portion is circular, and an outer portion is a combination of a circular arc and a circular arc protrusion. The inner diameter of the spring 4 is larger than the outer diameter of the upper portion of the fitting portion 22, and the outer diameter of the spring 4 is smaller than the outer circumferential radial dimension of the tube body 21 so that the spring 4 does not protrude from the tube body 21 and the puncture element 1, as shown in fig. 1 and 2. The outer circumferential surface of the pipe body 21 also has an arc-shaped protrusion, and thus, as shown in fig. 6 and 7, the thickness of a portion of the wall of the pipe body 21 corresponding to the arc-shaped protrusion 23 (i.e., a portion upward from the arc-shaped protrusion 23) increases. "upper" refers to the direction towards the sealing assembly 3 and "lower" refers to the direction towards the piercing element 1. As shown in fig. 1,2, and 5, the direction vertically upward along the paper surface is "up", and the direction vertically downward is "down". The above definition of the "up" and "down" directions applies to all components of coreless punch 100, including cannula 2 and piercing element 1.

As shown in fig. 7, the arc-shaped protrusion 23 is formed by increasing the wall thickness of the lower portion of the fitting portion 22. The maximum wall thickness at the arcuate projection 23 is W2, and the wall thickness at the portion other than the arcuate projection 23 is W1. The wall thickness of the arc-shaped protrusion 23 gradually increases from W1 to W2, and gradually decreases from W2 to W1. The blind hole accommodating the needle 24 is located at the maximum wall thickness W2. The arcuate projections of the pipe body 21 are also formed by increasing the wall thickness.

As shown in fig. 5 and 7, the lower end of the mating portion 22 is uniformly provided with the limiting members 221, and the number of the limiting members 221 may be 3. The stopper 221 includes an axial portion and a radial portion. The axial portion extends in the direction of the central axis of the sleeve 2, which is a part of the wall of the lower end of the fitting portion 22, and thus, the axial portion is arcuate in the direction of the outer periphery of the fitting portion 22. The radial portion is also arcuate in the direction of the outer periphery of the mating portion 22. The two sides of the axial portion are through grooves with equal lengths respectively arranged along the central axis direction of the sleeve 2, so that the axial portion further enables the limiting piece 221 to have elasticity. The radial portion extends perpendicularly and outwardly from the axial portion and has an inclined surface on its end surface which reduces the resistance when in sliding contact with the inner surface of the wall of the piercing element 1. "outer" refers to a direction along the radial direction of the sleeve 2 and away from the central axis of the sleeve 2, and "inner" refers to a direction along the radial direction of the sleeve 2 and toward the central axis of the sleeve 2. The above definition of the "inner", "outer" directions applies to all components of coreless punch 100, including cannula 2 and piercing element 1.

As shown in fig. 3, the lancing element 1 comprises an upper part 17 and a lower part, which may also be referred to as lancing part 15. The upper part 17 of the lancing element 1 comprises a through slot 11, the through slot 11 penetrating through the wall of the upper part 17 of the lancing element 1. The through groove 11 is for receiving a radial portion of the stopper 221, and limits a moving direction of the stopper 221 by a side surface of the through groove 11 contacting a side surface of the radial portion of the stopper 221. Further, by the connection of the through slot 11 with the stop 221, a movable connection between the piercing element 1 and the cannula 2 is achieved. The through slots 11 are evenly distributed along the circumference of the upper part 17 of the piercing element 1, which may be 3, in number with the number of limiting members 221. As shown in fig. 3 and4, the inner wall of the puncture element 1 has a boss 14, and the vertical distance of the upper end surface of the boss 14 from the upper end surface 13 of the puncture element 1 is equal to the vertical distance of the lower end surface 222 of the fitting portion 22 to the lower end surface 211 of the tube body 21 minus the height of the spring 4 after being fully compressed. In this embodiment the upper end surface of the boss 14 intersects the through groove 11 such that, when the lower end surface 222 of the mating part 22 abuts against the upper end surface of the boss 14, the relative movement between the cannula 2 and the piercing element 1 reaches a maximum distance, the needle 24 also reaches a maximum stroke and its tip protrudes from the piercing element 1, the radial part of the stopper 221 being located between the top and bottom surfaces of the through groove 11, as shown in fig. 2. The travel of the puncture element 1 relative to the cannula 2 and thus the length of the needle 24 extending out is limited by the abutment of the lower end surface 222 of the engagement portion 22 against the upper end surface of the boss 14. The radial portion of the limiting member 221 is located in the through groove 11, so that the limiting member 221 can only move up and down along the through groove 11, and further, the sleeve 2 and the puncture element 1 can only move up and down, and rotation along the peripheral surface and other undesired movements can not be generated, thereby playing a limiting role.

In another embodiment, the needle 24 is not accommodated by the wall of the mating portion 22, but by the boss 14 of the lancing element 1. Specifically, a portion of the needle 24 protrudes from the upper end face of the boss 14, the portion including the upper end of the needle 24, the outer peripheral dimension of the upper end of the needle 24 being larger than the outer peripheral dimension of the other portion of the needle 24 than the upper end, and a spring is provided between the lower surface of the upper end of the needle 24 and the upper end face of the boss 14. A recess is provided in the wall of the lower end of the mating portion 22, which recess corresponds in position to the needle 24 for receiving the upper end of the needle 24. And the depth of the groove is equal to the height of the upper end of the needle 24 plus the height of the spring after it has been fully compressed.

As shown in fig. 3 and 5, the puncture part 15 has a pen-point shape and includes an end 16. The bottom of the end 16 is arcuate. The bottom of the end portion 16 is not provided with a sharp shape in order to prevent the piercing element 1 from penetrating into the abdominal cavity, which may prick human tissue in the abdominal cavity. The end 16 is formed by the downward extension of the wall of the piercing element 1, thereby freeing the central part of the piercing element 1, providing space for the movement of the instrument. In order to reduce the resistance during penetration, the connection between the end 16 and the upper part 17 of the penetrating element 1 is provided as a rounded curve, together with the end 16, so that the penetrating part 15 assumes a pen-point shape. The projection 14 extends from the through groove 11 of the upper part 17 of the piercing element 1 up to the piercing section 15 as far as the end 16, i.e. the inner wall of the end 16 also has a projection. The portion of the boss 14 at the upper portion 17 of the lancing element 1 is annular as shown in FIG. 4. The shape of the boss 14 at the portion of the puncture part 15 is adapted to the shape of the pen point of the puncture part 15, as shown in fig. 5.

In accordance with the shape of the lower portion of the engaging portion 22, as shown in fig. 4, the inner surface of the upper portion 17 of the penetrating member 1 has an arc-shaped protrusion, and the remaining portion of the inner surface of the upper portion 17 of the penetrating member 1 other than the arc-shaped protrusion is arc-shaped. The outer circumference of the upper part 17 of the piercing element 1 is the same shape and size as the outer circumference of the tube body 21, and the tube body 21 and the upper part 17 of the piercing element 1 are prevented from being stepped in shape, thereby avoiding encountering additional resistance when entering and exiting the abdominal cavity and avoiding causing undesired damage to the abdominal cavity wall. Due to the presence of the spring 4, a distance may be provided between the piercing element 1 and the shaft 21, as shown in fig. 1 and 2, where the edges of the upper end surface 13 of the piercing element 1 and the lower end surface 211 of the shaft 21 may be exposed, the edges of the upper end surface 13 of the piercing element 1 and the edges of the lower end surface 211 of the shaft 21 may be chamfered to avoid additional resistance and undesired damage. Boss 14 also has an arcuate projection and a through hole 12 at the arcuate projection for passage of needle 24. One end of the through hole 12 is located at the upper end face of the boss 14, and the other end is located at the bottom of the end 16. In this way, the upper portion 17 of the lancing element 1 can receive the lower portion of the mating portion 22 and allow the lower portion of the mating portion 22 to move inside the upper portion 17 of the lancing element 1, the upper end face of the boss 14 can sufficiently abut against the lower end face 222 of the mating portion 22. The bore of the cannula 2 and the bore of the penetrating member 1 (i.e., the bore formed by the boss 14 in the upper portion 17 of the penetrating member 1) are coaxial cylinders for the passage of the instrument. The inner hole formed by the boss 14 at the puncture part 15 is arc-shaped, is coaxial with the cylinder, has the same radius and can be used for passing instruments.

The penetrating element 1 is assembled with the cannula 2 as follows: one end of the needle 24 is accommodated and fixed in a blind hole of the arc-shaped bulge 23 at the lower part of the matching part 22, and the other end of the needle 24, namely the tip end is downward; the spring 4 is sleeved on the outer peripheral surface of the upper part of the matching part 22; extending the needle 24 into the through hole 12 and corresponding the position of the through groove 11 to the position of the stopper 221; pushing the puncture element 1 upward or pressing the cannula 2 downward, the end surface of the radial portion of the stopper 221 abuts against the inner wall of the upper portion 17 of the puncture element 1, so that the axial portion of the stopper 221 is elastically deformed and bent inward, thereby driving the radial portion to displace inward; as the piercing element 1 continues to be pushed upwards or the cannula 2 continues to be pressed downwards, the needle 24 continues to penetrate into the through hole 12, the end face of the radial part of the stopper 221 slides along the inner wall of the upper part 17 of the piercing element 1 until the radial part reaches the through groove 11 of the upper part 17 of the piercing element 1, the axial part of the stopper 221 recovers from the elastic deformation, driving the radial part into the through groove 11; the assembly of the puncture element 1 with the cannula 2 is thus completed. When the assembly is completed, as shown in fig. 1, the spring 4 is located between the lower end face 211 of the tube 21 and the upper end face 13 of the lancing element 1, and the tip of the needle 24 is received in the through hole 12 without protruding from the end 16. The upper surface of the radial portion of the stopper 221 abuts against the top surface of the through groove 11 by the action of the spring 4.

The coreless penetrating device 100 is used as follows: a small opening is cut on the abdominal wall by a scalpel; pressing coreless puncture device 100 with end 16 against the small opening, and with end 16 being held against the small opening, sleeve 2 is moved in the direction of the small opening, and the upper end surface of boss 14 of puncture element 1 is held against lower end surface 222 of mating portion 22 of sleeve 2, spring 4 is fully compressed, and no relative movement between sleeve 2 and puncture element 1 can occur, and the tip of needle 24 protrudes from through hole 12 and pierces the small opening; continuing to press coreless punch 100, cannula 2 pushes needle 24 to continue to pierce into the abdominal cavity, thereby reducing the resistance to penetration of end 16 and the remainder of piercing section 15, and continuing to press causes needle 24, end 16, the remainder of piercing section 15 excluding end 16, and upper portion 17 of piercing element 1 to sequentially pierce through the abdominal cavity wall and into the abdominal cavity; when the depth of the coreless puncture device 100 entering the abdominal cavity reaches the requirement, the coreless puncture device 100 is not pressed any more, and at the moment, the spring 4 is subjected to self elasticity to restore the shape, so that the sleeve 2 is driven to move in the direction away from the abdominal cavity, and the tip of the needle 24 is driven to retract into the through hole 12, and the tissue is prevented from being punctured in the operation; after the use, the coreless puncture device 100 is pulled out in a direction away from the abdominal cavity, and the upper surface of the radial part of the limiting piece 221 is abutted against the top surface of the through groove 11 to drive the puncture element 1, so that the sleeve 2 and the puncture element 1 are pulled out together.

Claims

1. A coreless puncture device comprising a cannula, a puncture element and a puncture guide, characterized in that the cannula comprises a mating part and a cannula body; the matching part and the pipe body are integrally formed or connected with each other; the puncture guide is arranged on the matching part;

the sleeve and the inner wall of the puncture element jointly form a channel for passing an instrument, and the channel comprises a first channel for passing the instrument inside the puncture element, and a third channel for passing the instrument, which is formed by the inner wall of the matching part and the inner wall of the pipe body jointly;

The cannula includes a limiter, the penetrating member having a connecting structure, the limiter cooperating with the connecting structure to movably connect the cannula with the penetrating member; the movement causes the piercing guide to extend and retract from the forward end of the piercing element.

2. The coreless penetration device of claim 1, wherein the mating portion includes a stop; the connecting structure is a through groove, and the through groove is connected with the limiting piece so that the sleeve is movably connected with the puncture element.

3. The coreless penetration device of any one of claims 1 and 2, wherein the wall of the mating portion receives and secures the penetration guide, or the penetration member includes a boss in which the penetration guide is received, a portion of the penetration guide extending from an upper end surface of the boss, the portion including an upper end of the penetration guide, the wall of a lower end of the mating portion providing a downwardly opening recess in which an upper end of the penetration guide is received, and a spring being provided between a lower surface of the upper end of the penetration guide and the upper end surface of the boss.

4. The coreless penetration assembly of claim 2, wherein the mating portion includes an upper portion for a spring sleeve and a lower portion, and the stop is formed in a wall of the lower portion.

5. The coreless penetration assembly of claim 2, wherein the mating portion has an outer circumferential radial dimension that is less than an outer circumferential radial dimension of the tubular body.

6. The coreless penetration assembly of claim 2, wherein the stop member includes an axial portion and a radial portion; the axial portion extends along the central axis direction of the sleeve, and the radial portion is approximately perpendicular to the axial portion and extends outwards;

The radial portion is received in the through slot, and a side of the through slot moves along a side of the radial portion in response to movement of the penetrating member relative to the cannula.

7. The coreless penetration assembly of claim 6 wherein both sides of the axial portion are through slots; the end face of the radial part is an inclined plane or a curved surface.

8. The coreless penetration assembly of claim 1, wherein the penetration member comprises a penetration portion comprising an end; a second passageway is also provided within the lancing element for the lancing guide to pass through, with an opening in the second passageway at the end.

9. The coreless penetration assembly of claim 8, wherein the connection structure is a through slot extending through a wall of the penetration member.

10. The coreless penetration device of claim 8, wherein the penetration portion is nib-shaped.

11. The coreless punch of claim 8, wherein the inner wall of the punch member has a blocking structure.

12. The coreless penetration assembly of claim 11 wherein the connection structure is a through slot extending through a wall of the penetration member; the upper surface of the blocking structure is flush with the bottom surface of the through groove or the upper surface is positioned between the bottom surface and the top surface of the through groove.

13. The coreless punch of claim 12, wherein the other opening of the second channel is located on the upper surface of the blocking structure.

14. The coreless penetration device of any one of claims 1,2, wherein the penetration guide is a needle.