CN213883307U

CN213883307U - Marrow biopsy needle

Info

Publication number: CN213883307U
Application number: CN202020783238.7U
Authority: CN
Inventors: 李其辉; 景红梅
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-08-06
Anticipated expiration: 2030-05-12

Abstract

The utility model relates to a tissue sampling, inspection technical field, concretely relates to marrow biopsy needle. The needle core is arranged in a needle sheath cavity, and the needle sheath and the needle core are arranged on the mounting component; the head end of the needle sheath is provided with a channel with an arc-shaped path along the axial direction, and the channel penetrates through the wall of the needle sheath; the needle sheath cutting device further comprises a cutting assembly, the cutting assembly further comprises a cutting part and a driving part, the cutting part penetrates through the channel, and the driving part drives the cutting part to extend into the needle sheath cavity. The bone marrow biopsy needle of the utility model has small acting force of the cutting piece on the bone marrow tissue, the bone marrow tissue is not easy to be separated from the needle sheath cavity in the cutting process, and the collection requirement can be met; and the needle core of the bone marrow biopsy needle does not need to be provided with a groove for accommodating bone marrow tissues, so that the needle core has better structural strength and is not easy to break when penetrating through a hard bone layer.

Description

Marrow biopsy needle

Technical Field

The utility model relates to a tissue sampling, inspection technical field, concretely relates to marrow biopsy needle.

Background

Bone marrow biopsy is a pathological examination of a small cylindrical bone marrow tissue about 0.5-1 cm long by a special puncture needle, which is generally called a bone marrow biopsy needle or biopsy needle.

Generally, a biopsy needle for bone marrow comprises a needle core and a needle sheath sleeved on the needle core, wherein in clinical use, medical staff firstly inserts the needle core into the needle sheath, the needle head extends out of the needle sheath to pierce cortex lycii, then retracts the needle head, bone marrow tissue enters the needle sheath due to internal and external pressure difference, and the bone marrow tissue can be obtained by withdrawing the needle sheath.

However, since the bone marrow living tissues are connected together, the bone marrow living tissues are separated from the needle sheath when the needle sheath is withdrawn, and particularly, the bone marrow living tissues are often collected for many times for osteoporosis patients, which not only increases the burden of medical staff, but also brings pain to the patients.

In the prior art, for example, chinese patent document CN205041444U discloses a bone biopsy needle, which includes: which relates to: the puncture end of the biopsy needle core is a closed end surface, and a strip-shaped biopsy groove used for accommodating the living tissue in the bone is formed in the side wall of the biopsy needle core close to the needle tip. The side wall of the needle sheath close to the puncture end is provided with a biopsy window corresponding to the strip-shaped biopsy groove, and when the biopsy needle core and the needle sheath enter the marrow cavity together, the strip-shaped biopsy groove is aligned with the biopsy window. When bone marrow tissue crosses the biopsy window and enters the strip-shaped biopsy groove, the biopsy needle core is kept still, the needle sheath is rotated to cut the bone marrow tissue, the bone marrow tissue in the strip-shaped biopsy groove is sealed, and the bone marrow tissue is prevented from falling off in the process of pulling out the bone puncture biopsy needle.

However, when the needle sheath is rotated to cut the bone marrow tissue, the bone marrow tissue is greatly acted by the needle sheath, and the bone tissue is partially separated from the strip-shaped biopsy groove, so that the amount of the collected bone marrow tissue is small, and the collection requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a bone marrow biopsy needle to the bone marrow tissue volume of the collection of the bone aspiration biopsy needle who solves among the prior art is few, does not reach the problem of gathering the requirement.

The technical scheme of the utility model is that:

a marrow biopsy needle comprises a mounting component, a needle sheath and a needle core, wherein the needle core is arranged in a needle sheath cavity, and the needle sheath and the needle core are arranged on the mounting component; the head end of the needle sheath is provided with a channel with an arc-shaped path along the axial direction, and the channel penetrates through the wall of the needle sheath; the needle sheath cutting device further comprises a cutting assembly, the cutting assembly further comprises a cutting part and a driving part, the cutting part penetrates through the channel, and the driving part drives the cutting part to extend into the needle sheath cavity.

The driving piece is connected with a limiting structure arranged on the outer surface of the needle sheath through a connecting piece.

The limiting structure is a limiting groove along the length direction of the needle sheath.

The cutting piece is of an arc structure matched with the radian of the channel.

The cutting piece is of an arc-shaped sheet structure, and the end part of the cutting piece extending into the needle sheath cavity is provided with a blade.

The cutting piece and the channel are provided with a plurality of channels which are uniformly distributed on the needle sheath.

The connecting piece is a sleeve which is sleeved on the needle sheath.

The sleeve is flush with the outer surface of the needle sheath.

The mounting assembly comprises a mounting seat fixedly connected with the needle sheath and a joint fixedly connected with the needle core, and the joint is in threaded connection with the mounting seat; the driving piece is a handle arranged on one side of the mounting seat.

The utility model discloses technical scheme has following advantage:

1. the utility model relates to a bone marrow biopsy needle, which comprises an installation component, a needle sheath and a needle core, wherein the needle core is arranged in a needle sheath cavity, and the needle sheath and the needle core are arranged on the installation component; the head end of the needle sheath is provided with a channel with an arc-shaped path along the axial direction, and the channel penetrates through the wall of the needle sheath; the cutting assembly further comprises a cutting member and a driving member, and the cutting member penetrates through the channel. When the needle is used, the needle core penetrates the skin and the bone layer to the bone marrow collecting area, the needle sheath enters the bone marrow collecting area along with the skin and the bone marrow collecting area, the needle core retracts backwards, the bone marrow tissue enters the needle sheath cavity, then the driving piece drives the cutting piece to extend into the needle sheath cavity, part of the adhered bone marrow tissue is cut off, and the bone marrow tissue can be prevented from being separated from the needle sheath cavity in the process of pulling out the needle sheath.

Compared with the existing bone puncture biopsy needle, the bone marrow biopsy needle of the utility model has the advantages that the bone marrow tissue has small acting force of the cutting piece, and the bone marrow tissue is not easy to be separated from the needle sheath cavity in the cutting process, thus meeting the collection requirement; and the needle core of the bone marrow biopsy needle does not need to be provided with a groove for accommodating bone marrow tissues, so that the needle core has better structural strength and is not easy to break when penetrating through a hard bone layer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a half-sectional view of a bone marrow biopsy needle according to the present invention;

fig. 2 is a schematic view of the needle sheath and mounting hub of fig. 1.

Description of reference numerals:

1-needle sheath; 2-a needle core; 3-needle sheath lumen; 4-needle sheath wall; 5-a channel; 6-a limiting groove; 7-a sleeve; 8-the outer surface of the needle sheath; 9-a mounting seat; 10-a linker; 11-a handle; 12-cutting member.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The bone marrow biopsy needle of the embodiment, as shown in fig. 1 and fig. 2, comprises a mounting assembly, a needle sheath 1 and a needle core 2, wherein the needle core 2 is arranged in a needle sheath cavity 3, and the needle sheath 1 and the needle core 2 are arranged on the mounting assembly; the head end of the needle sheath 1 is provided with a channel 5 with an arc-shaped path along the axial direction, and the channel 5 penetrates through the needle sheath cavity 3; and a cutting assembly, which comprises a cutting part 12 and a driving part, wherein the cutting part 12 passes through the channel 5, and the driving part drives the cutting part 12 to extend into the needle sheath cavity 3.

Compared with the existing bone puncture biopsy needle, the bone marrow biopsy needle of the embodiment has the advantages that the bone marrow tissue is less acted by the cutting part 12, and the bone marrow tissue is not easy to separate from the needle sheath cavity 3 in the cutting process, so that the collection requirement can be met; moreover, the needle core 2 of the bone marrow biopsy needle does not need to be provided with a groove for accommodating bone marrow tissues, thereby having better structural strength and being not easy to break when penetrating through a hard bone layer.

Wherein, the driving piece is connected with a limit structure arranged on the outer surface 8 of the needle sheath through a connecting piece. The limiting structure is a limiting groove 6 along the length direction of the needle sheath 1. The connecting piece is arranged on the outer surface 8 of the needle sheath, so that the difficulty of the processing and manufacturing process is reduced. In the embodiment, the connecting piece is the sleeve 7, the sleeve 7 is sleeved on the needle sheath 1 and is in sliding connection with the groove surface of the limiting groove 6 when in use, and the sleeve 7 is used for reducing the structural complexity of the limiting groove 6 and reducing the processing cost; the sleeve 7 is flush with the outer surface 8 of the needle sheath, making the bone marrow biopsy needle aesthetically pleasing.

Wherein, the cutting piece 12 is an arc sheet structure matched with the radian of the channel 5, and the end part of the cutting piece 12 extending into the needle sheath cavity 3 is provided with a blade. Of course, the cutting member 12 may be a column or other structures capable of achieving the above function, and the cutting member 12 is made of steel with certain toughness. The cutting member 12 and the channels 5 are provided in plurality, and the plurality of channels 5 are uniformly provided on the needle sheath 1.

The mounting assembly comprises a mounting seat 9 fixedly connected with the needle sheath 1 and a joint 10 fixedly connected with the needle core 2, and the joint 10 is in threaded connection with the mounting seat 9; the driving piece is a handle 11 arranged on one side of the mounting seat 9.

The bone marrow biopsy needle of the present example was used as follows:

(1) inserting the stylet 2 into the needle sheath 1, connecting the connector 10 with the mounting seat 9, screwing the connector 10, enabling the stylet 2 to extend out of the needle sheath 1 and pierce the skin and the bone layer to a bone marrow collecting area, pushing the mounting seat 9 by hand, and enabling the stylet 1 to enter the bone marrow collecting area;

(2) screwing the joint 10, retracting the needle core 2 backwards, and enabling the bone marrow tissue to enter the needle sheath cavity 3;

(3) the handle 11 is pushed downwards by hand, the handle 11 drives the sleeve 7 to move downwards, the sleeve 7 drives the cutting element 12 to extend into the needle sheath cavity 3, part of the adhered bone marrow tissue is cut off, and the bone marrow tissue can be prevented from separating from the needle sheath cavity 3 in the process of pulling out the needle sheath 1;

(4) the needle sheath 1 is pulled out, and then the handle 11 is returned to the original position, so that the bone marrow tissue can be obtained.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. A bone marrow biopsy needle, comprising:

the needle comprises a mounting assembly, a needle sheath (1) and a needle core (2), wherein the needle core (2) is arranged in a needle sheath cavity (3), and the needle sheath (1) and the needle core (2) are arranged on the mounting assembly; a channel (5) with an arc-shaped path is arranged at the head end of the needle sheath (1) along the axial direction of the needle sheath, and the channel (5) penetrates through the needle sheath cavity (3);

the cutting assembly comprises a cutting piece (12) and a driving piece, the cutting piece (12) penetrates through the channel (5), and the driving piece drives the cutting piece (12) to stretch into the needle sheath cavity (3).

2. Bone marrow biopsy needle according to claim 1, characterized in that the drive member is connected to a stop structure provided on the outer surface (8) of the needle sheath by means of a coupling member.

3. Bone marrow biopsy needle according to claim 2, characterized in, that the stop feature is a stop groove (6) along the length of the needle sheath (1).

4. Bone marrow biopsy needle according to any of claims 1-3, characterized in that the cutting member (12) is of an arc-shaped configuration matching the curvature of the channel (5).

5. Bone marrow biopsy needle according to claim 4, characterized in that the cutting element (12) is an arc-shaped sheet structure, and the end of the cutting element (12) extending into the sheath cavity (3) is provided with a blade.

6. Bone marrow biopsy needle according to claim 4, characterized in that the cutting member (12) and the channel (5) are provided in plurality, the channels (5) being evenly arranged on the needle sheath (1).

7. Bone marrow biopsy needle according to claim 2 or 3, characterized in, that the connector is a sleeve (7), the sleeve (7) being sleeved over the needle sheath (1).

8. Bone marrow biopsy needle according to claim 7, characterized in that the sleeve (7) is flush with the sheath outer surface (8).

9. The bone marrow biopsy needle of claim 4, wherein the mounting assembly comprises:

the needle comprises a mounting seat (9) fixedly connected with the needle sheath (1) and a joint (10) fixedly connected with the needle core (2), wherein the joint (10) is in threaded connection with the mounting seat (9); the driving piece is a handle (11) arranged on one side of the mounting seat (9).