CN218922654U

CN218922654U - Diamond prismatic reverse cutting edge needle head structure of rotary cutting needle

Info

Publication number: CN218922654U
Application number: CN202222734934.0U
Authority: CN
Inventors: 江常胜; 沈旭波
Original assignee: Wuhan Bbt Medical Technology Development Co ltd
Current assignee: Wuhan Bbt Medical Technology Development Co ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-04-28
Anticipated expiration: 2032-10-14

Abstract

The utility model discloses a diamond-shaped prismatic reverse-cutting-edge needle head structure of a rotary cutting needle, which comprises a needle head and a puncture needle tube connected with the needle head, wherein the needle head comprises a conical needle head cone and a plurality of diamond-shaped prismatic forward and reverse cutting edges uniformly distributed on the periphery of the needle head cone, and each diamond-shaped prismatic forward and reverse cutting edge comprises a triangular forward advancing cutting edge and a triangular reverse needle withdrawing cutting edge; one end of each of the triangular forward-moving cutting edges is connected with the vertex of the needle cone to form a cutter point, the other end of each of the triangular forward-moving cutting edges is connected with the triangular reverse-moving cutting edge, and the triangular forward-moving cutting edges and the triangular reverse-moving cutting edges form cutting points which are larger than the diameter of the puncture needle tube at the connecting positions of the triangular forward-moving cutting edges and the triangular reverse-moving cutting edges. The utility model has simple, reasonable, effective, safe and convenient structure; the operation comfort level can be improved, the operation effect is optimized, and the operation time is saved.

Description

Diamond prismatic reverse cutting edge needle head structure of rotary cutting needle

Technical Field

The utility model relates to the field of medical appliances, in particular to a diamond-shaped prismatic reverse-blade needle head structure of a rotary cutting needle.

Background

Minimally invasive puncture is a common diagnostic and therapeutic means in medicine, such as clinical biopsy, minimally invasive perforation, etc., where a puncture needle is inserted into a patient to incise or eliminate diseased tissue. In the prior art, the puncture force of the three-spherical concave puncture knife head and the three-spherical concave puncture knife head is generally increased along with the increase of the outer diameter. For example, the existing three-spherical concave puncture knife head and three-spherical concave puncture knife head with the outer diameters of 5.1mm are widely reflected by surgeons, puncture is difficult, resistance is large and unsmooth, tissue clamping force on a needle tube is large, and pulling and clamping are carried out when the knife is moved back, and particularly young compact tissue is more obvious. The high puncture and withdrawal resistance results in increased operation difficulty for doctors and prolonged operation time.

The three spherical concave puncture tool bit and three triangular concave puncture tool bit on the market at present, as the rotary-cut needle disclosed by the prior art three prismatic concave puncture tool bit CN202121992657.2 is between 3.0 and 6N in puncture strength, the existing structure of the rotary-cut needle cannot adjust the three-angle and sharpness of the puncture angle, the clamping force of tissues to the needle tube in the puncture process and the strength of the operation of pulling and clamping when retracting the knife cannot be reduced any more, the operation difficulty of doctors is increased, the tissues are pressed and moved in the puncture process, the tissue positioning difficulty is increased, the difficulty of pulling and clamping when retracting the knife is increased, discomfort of patients and the operation completion operation difficulty of doctors are increased, and the operation time is prolonged.

Disclosure of Invention

The utility model aims to provide a diamond-shaped prismatic reverse-blade needle head structure of a rotary cutting needle, wherein the highest cutting point is larger than the diameter of a puncture needle tube, a needle inlet channel larger than the diameter of the needle tube can be cut in tissues, and the holding pressure of muscle tissues on the puncture needle tube is reduced; the multiple triangular reverse needle withdrawing cutting edges reversely cut when the needle withdrawing is moved, so that the needle withdrawing movement force is reduced, the operation effect is optimized, and the operation time is saved.

The technical scheme adopted for solving the technical problems is as follows: a diamond-shaped prismatic reverse-cutting-edge needle head structure of a rotary cutting needle comprises a needle head and a puncture needle tube connected with the needle head,

the needle comprises a conical needle cone and a plurality of diamond-shaped prismatic positive and negative cutting edges uniformly distributed on the periphery of the needle cone, wherein each diamond-shaped prismatic positive and negative cutting edge comprises a triangular forward cutting edge and a triangular reverse needle withdrawal cutting edge;

one end of each of the triangular forward-moving cutting edges is connected with the vertex of the needle cone to form a cutter point, the other end of each of the triangular forward-moving cutting edges is connected with the triangular reverse-moving cutting edge, and the triangular forward-moving cutting edges and the triangular reverse-moving cutting edges form cutting points which are larger than the diameter of the puncture needle tube at the connecting positions of the triangular forward-moving cutting edges and the triangular reverse-moving cutting edges.

Preferably, along the axial direction of the needle cone, one end of the triangular reverse needle withdrawal cutting edge, which is close to the puncture needle tube, is gradually reduced towards the tail part of the needle cone.

Optionally, the tip is located outside the apex along the axial direction of the needle cone.

Preferably, 2-4 diamond-shaped prismatic positive and negative cutting edges are uniformly distributed on the periphery of the needle cone.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has simple, reasonable, effective, safe and convenient structure; the sharpness of the puncture tool bit is improved through the plurality of diamond-shaped positive and negative cutting edges, the highest cutting point of the diamond-shaped cutting edge is larger than the diameter of the puncture needle tube, the diameter of tissue puncture cutting is increased, a needle inlet channel larger than the diameter of the needle tube can be cut in tissues, the holding pressure of muscle tissues on the puncture needle tube is reduced, the puncture force of an operator during the operation is reduced, and the phenomenon of preventing movement caused by overlarge puncture force is reduced; the reverse needle cutting edge that moves back of many triangular prism for in the operation, the operator is moving back the reverse cutting when the needle, blocks needle tubing musculature and fascia reverse cutting to the extrusion, reduces and moves the dynamics of moving back the needle, has avoided pulling the cutting edge when the card is on a pause when moving back the sword, promotes the use comfort of operation, optimizes the operation effect, practices thrift operation time.

Drawings

FIG. 1 is a schematic view of a needle in accordance with the present utility model;

FIG. 2 is a schematic view of the positive and negative edges of a diamond-shaped prism according to the present utility model;

FIG. 3 is a schematic view of the needle and needle cannula of the present utility model;

FIG. 4 is a schematic view of a cutting point of the present utility model cutting a channel larger than the diameter of a piercing needle;

FIG. 5 is a schematic view of the reverse withdrawal of a needle by a surgical movement of the cutting edge of the withdrawn needle according to the present utility model;

reference numerals illustrate: 1. the needle head, 2, the needle head cone, 3, the triangular forward advancing cutting edge, 4, the cutting point, 5, the triangular reverse needle withdrawing cutting edge, 6, puncture needle tube.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

1-5, a diamond-shaped prismatic reverse-cutting-edge needle structure of a rotary cutting needle comprises a puncture needle tube 6, wherein the end head of the puncture needle tube 6 is connected with a needle head 1, the needle head 1 comprises a conical needle head cone 2, and the maximum section of the bottom of the needle head cone 2 is consistent with the section of the puncture needle tube 6 in size; a plurality of diamond-shaped prismatic positive and negative cutting edges are uniformly distributed on the outer surface of the needle cone 2, wherein each diamond-shaped prismatic positive and negative cutting edge comprises a triangular forward cutting edge 3 and a triangular reverse needle withdrawal cutting edge 5; one end of a plurality of triangular forward cutting edges 3 is connected with the top point of the needle cone 2 to form a knife tip, the other end is connected with a triangular reverse needle withdrawing cutting edge 5, and the triangular forward cutting edges 3 and the triangular reverse needle withdrawing cutting edge 5 form a cutting point 4 which is larger than the diameter of the puncture needle tube 6 at the connecting part.

According to the utility model, in the axial direction of the needle cone 2, the cutter point is positioned at the outer side of the vertex, and the triangular forward advancing cutting edge 3 is a cutting edge during needle insertion in operation, so that the sharpness of the puncture cutter head is improved; the triangular reverse needle withdrawal cutting edge 5 is a cutting edge during the operation movement needle withdrawal, and one end of the triangular reverse needle withdrawal cutting edge 5, which is close to the puncture needle tube 6, is gradually reduced towards the tail part of the needle cone 2 along the axial direction of the needle cone 2, so that an operator can reversely cut during the operation when moving the needle withdrawal, and can reversely cut muscle tissues and fascia of the needle tube during extrusion to prevent the needle withdrawal from being damaged, thereby reducing the needle withdrawal movement force, avoiding the cutting edge during the pulling and clamping during the withdrawal of the cutter, improving the use comfort of the operation, optimizing the operation effect and saving the operation time; the cutting point 4 larger than the diameter of the puncture needle tube 6 increases the diameter of tissue puncture cutting, can cut a needle inlet channel larger than the diameter of the puncture needle tube 6 in tissues, reduces the holding pressure of muscle tissues on the puncture needle tube, reduces the puncture force of an operator during the operation when the operator performs puncture, and reduces the phenomenon of preventing movement caused by overlarge puncture force.

According to the wide circumference of the needle cone 2, preferably, the outer circumference of the needle cone 2 can accommodate 2-4 diamond-shaped prismatic positive and negative cutting edges, so that the needle cone can better puncture and withdraw from tissues.

While the utility model has been described by way of example, it should be noted that the above embodiments are merely illustrative of the utility model and should not be construed as limiting the scope of the utility model, and any simple modification, variation or other equivalent substitution which would be obvious to those skilled in the art without departing from the spirit of the utility model will fall within the scope of the utility model.

Claims

1. The diamond-shaped prismatic reverse-cutting-edge needle head structure of the rotary cutting needle comprises a needle head (1) and a puncture needle tube (6) connected with the needle head, and is characterized in that,

the needle (1) comprises a conical needle cone (2) and a plurality of diamond-shaped prismatic positive and negative cutting edges uniformly distributed on the periphery of the needle cone (2), wherein each diamond-shaped prismatic positive and negative cutting edge comprises a triangular forward cutting edge (3) and a triangular reverse needle withdrawal cutting edge (5);

one end of each triangular forward-moving cutting edge (3) is connected with the vertex of the needle cone (2) to form a cutter point, the other end of each triangular forward-moving cutting edge is connected with the triangular reverse-moving cutting edge (5), and the cutting points (4) larger than the diameter of the puncture needle tube (6) are formed at the connecting positions of the triangular forward-moving cutting edges (3) and the triangular reverse-moving cutting edges (5).

2. The diamond-shaped prismatic reverse-cutting-edge needle structure of the rotary cutting needle according to claim 1, wherein one end of the triangular-shaped reverse-needle-withdrawing cutting edge (5) close to the puncture needle tube (6) is tapered towards the tail of the needle cone (2) along the axial direction of the needle cone (2).

3. A diamond-shaped prismatic counter-blade needle structure of rotary cutting needles according to claim 1, characterized in that said tip is located outside said vertex, along the axial direction of said needle cone (2).

4. The diamond-shaped prismatic reverse-blade needle structure of the rotary cutting needle according to claim 1, wherein 2-4 diamond-shaped prismatic reverse-blade are uniformly distributed on the periphery of the needle cone (2).