CN215874737U

CN215874737U - Biopsy needle

Info

Publication number: CN215874737U
Application number: CN202121943805.1U
Authority: CN
Inventors: 李月晴
Original assignee: Jiangsu Aidewen Medical Instrument Co ltd
Current assignee: Jiangsu Aidewen Medical Instrument Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-02-22
Anticipated expiration: 2031-08-18

Abstract

The utility model relates to the technical field of medical instruments, in particular to a biopsy needle. The specific technical scheme is as follows: the utility model provides a biopsy needle, includes the needle tubing and sets up the nook closing member in the needle tubing, the one end of needle tubing is the needle point, and another pot head is equipped with the sleeve pipe, the intraductal spring that is provided with of cover, the one end of nook closing member is passed the spring stretches out the sleeve pipe and is fixed with the limiting plate outward, is close to the other end of nook closing member the notch has been seted up on the lateral wall of nook closing member, is close to set up the fixture block that several and spring offset on the lateral wall of the nook closing member of limiting plate. The utility model solves the problem that the puncture depth of the biopsy needle cannot be controlled in the prior art.

Description

Biopsy needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a biopsy needle.

Background

In diagnosing diseases, it is sometimes necessary to take a biopsy of a lesion, that is, to take a living tissue from the lesion using a specific medical instrument and to perform pathological analysis on the living tissue for symptomatic treatment.

In the prior art, a common medical instrument is a bullet type biopsy needle, and the biopsy needle is released through a built-in spring in the device, so that living tissue at a focus is obtained. In the actual operation process, the released biopsy needle punctures to the focus to obtain the living cells. If the tissue is not obtained once, the above operation needs to be repeated, but the probability of human body injury is increased. Meanwhile, because the biopsy needle is pricked out under the action of the spring, the depth of the puncture cannot be controlled, and living cells at different depths of a focus are difficult to obtain in a targeted manner.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a biopsy needle, which solves the problem that the puncture depth of the biopsy needle cannot be controlled in the prior art.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model discloses a biopsy needle, which comprises a needle tube and a needle core arranged in the needle tube, wherein one end of the needle tube is a needle point, the other end of the needle tube is sleeved with a sleeve, a spring is arranged in the sleeve, one end of the needle core penetrates through the spring and extends out of the sleeve and is fixedly provided with a limiting plate, a notch is formed in the side wall of the needle core close to the other end of the needle core, and a plurality of clamping blocks which are abutted against the spring are arranged on the side wall of the needle core close to the limiting plate.

Preferably, the bottom of the notch is recessed inwards.

Preferably, a plurality of stop blocks are arranged on the inner wall of the sleeve, one end of the spring abuts against the end face of the needle tube, and the other end of the spring abuts against the stop blocks.

Preferably, the stylet is divided into a large-diameter section and a small-diameter section, the notch is formed in the large-diameter section, a closed tube is sleeved on the small-diameter section of the stylet, one end of the closed tube extends into the stylet, a baffle is fixed to the other end of the closed tube and abuts against the end opening of the sleeve, and a strip-shaped hole for the fixture block to penetrate through is formed in the side wall of the closed tube.

Preferably, one end of the strip-shaped hole penetrates through the baffle, and the hole penetrating through the baffle is larger than the fixture block.

Preferably, an annular sealing sleeve is arranged on the inner wall of the closed pipe close to the pipe orifice of the closed pipe.

Preferably, the length of the annular sealing sleeve is greater than the length of the slot.

Preferably, an annular sealing gasket is arranged on the inner wall of the needle tube close to the needle point of the needle tube, and the inner ring of the annular sealing gasket is in contact with the side wall of the needle core.

Preferably, when the needle core does not extend out of the needle tube, the annular sealing gasket is close to the needle point of the needle core.

Preferably, the small diameter section of the stylet is provided with scale marks.

The utility model has the following beneficial effects:

according to the utility model, the sleeve is arranged at one end of the needle tube, the spring is limited in the sleeve through the stop block, the needle core is arranged in the needle tube in a penetrating manner, the notch is arranged on the needle core, and the clamping block for compressing the spring is arranged on the side wall of the needle core, so that the length of the needle core extending out of the needle tube can be controlled. Simultaneously, be equipped with the closed tube at the nook closing member overcoat, have the bar hole that supplies the fixture block to follow the motion of closed tube length direction on the closed tube to set up the ring packing cover in the closed tube, move the position to the ring packing cover place with the one end that the nook closing member has the notch, and then seal the notch, thereby better save the live body tissue of gathering.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a view taken along line A-A of FIG. 1;

FIG. 3 is a view taken along line B-B of FIG. 1 (particularly a view taken along line B-B of the hub of FIG. 1);

FIG. 4 is a schematic view of a closed tube structure;

FIG. 5 is a schematic view of a structure of a stylet;

in the figure: the needle tube 1, the needle core 2, the sleeve 3, the spring 4, the limiting plate 5, the notch 6, the fixture block 7, the stop block 8, the closed tube 9, the baffle 10, the strip-shaped hole 11, the annular sealing sleeve 12 and the annular sealing gasket 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-5, the utility model discloses a biopsy needle, comprising a needle tube 1 and a needle core 2 arranged in the needle tube 1, wherein one end of the needle tube 1 and one end of the needle core 2 are needle points, and the other end of the needle tube 1 is sleeved with a sleeve 3, i.e. the other end part of the needle tube 1 extends into the sleeve 3 and is fixed. A spring 4 is arranged in the sleeve 3, and one end of the spring 4 is supported on the end surface of the needle tube 1 extending into the sleeve 3. One end of the stylet 2 passes through the spring 4 and extends out of the cannula 3, and is fixed with a limiting plate 5, and the limiting plate 5 is used as a handle operated by medical staff. A notch 6 is arranged on the side wall of the needle core 2 near the other end of the needle core 2, namely the notch 6 is arranged at the position near the needle point of the needle core. A plurality of clamping blocks 7 which are propped against the spring 4 are arranged on the side wall of the needle core 2 which is close to the limiting plate 5. It should be noted that: when the nook closing member 2 is through pressing when stretching out outside needle tubing 1, fixture block 7 directly supports and leans on the tip at spring 4, along with the motion of nook closing member 2, makes the spring compressed gradually, simultaneously, presses the dynamics of nook closing member 2 through medical personnel to the one end that control nook closing member 2 has notch 6 stretches out the length outside needle tubing 1, and then realizes the control of nook closing member depth of puncture, acquires the living body cell of focus department different positions.

Further, in order to obtain more living tissue at a time, referring to fig. 3, the bottom of the notch 6 is recessed inward, and the recessed shape is not limited. The end surfaces of the two side walls of the sunken part are inclined surfaces and incline towards the sunken part, so that living tissues are prevented from being detained on the end surfaces of the two side walls of the sunken part.

Furthermore, in order to avoid the spring from falling from the inside of the sleeve, a plurality of stop blocks 8 are arranged on the inner wall of the sleeve 3, one end of the spring 4 is abutted against the end face of the needle tube 1, and the other end of the spring is abutted against the stop blocks 8, namely the spring is arranged between the end face of the needle tube extending into the sleeve and the stop blocks. The position of the block 7 is between the adjacent blocks 8, as shown in fig. 2. The number of the latch 7 and the stopper 8 is not limited, but in order to provide more space for the needle core to rotate, the number of the latch 7 and the stopper 8 is preferably 2.

Further, in order to prevent the components inside the cannula from being exposed to air, a sealing plate (not shown) may be provided on the end face of the cannula, through which the stylet passes.

Furthermore, in order to seal the notch and the living tissue in the notch after sampling is completed and prevent the living tissue from leaking, the stylet 2 is divided into a large-diameter section and a small-diameter section, the notch 6 is arranged on the large-diameter section, and the limiting plate 5 is arranged on the end face of the small-diameter section. The cover is equipped with closed tube 9 on the path section of nook closing member 2, the length of nook closing member path section is greater than closed tube 9's length, a tip part of closed tube 9 stretches into in needle tubing 1, the other end is fixed with baffle 10 and offsets with sleeve pipe 3's port, set up the bar hole 11 that supplies fixture block 7 to pass on closed tube 9's the lateral wall, make fixture block 7 along bar hole 11 reciprocating motion, and the length of bar hole 11 can stretch out the maximum length outside the needle tubing according to the nook closing member and set up, also can be other length, set up according to actual need can. It should be noted that: the outer side wall of the closed tube 9 is mutually attached to the inner side wall of the needle tube 1. When the closing tube 9 is provided, a sealing plate is not required. And one end of the strip-shaped hole 11 penetrates through the baffle 10, and the hole penetrating through the baffle 10 is larger than the fixture block 7, namely the hole in the baffle 10 can enable the fixture block 7 to penetrate through, so that the needle core can be conveniently taken out of the closed tube.

When the needle is installed, the needle core is inserted into the closed tube, the clamping block moves in the strip-shaped hole, and then the needle core and the closed tube are inserted into the spring in the sleeve together and extend into the needle tube until the clamping block abuts against the end face of the spring. The diameter of the closed tube is larger than that of the large-diameter section of the needle core.

Furthermore, an annular sealing sleeve 12 is arranged on the inner wall of the closing tube 9 close to the tube opening. The length of the annular sealing sleeve 12 is greater than the length of the slot 6, so as to seal the slot. The internal diameter of ring seal cover 12 is less than the diameter of nook closing member major diameter section, and the ring seal cover is made by the rubber material, has certain elasticity and can be by the compressibility, and when the nook closing member had the one end of notch and moved towards in the closed tube, ring seal cover 12 can seal the notch to avoid the live body tissue of gathering to leak. When sampling, the needle tube is inserted into human body and pricked into the focus position, then the needle core moves towards the direction of the needle tube, the needle core extends out of the needle tube, at the moment, the notch on the needle core gradually extends out of the needle tube, and collects the cells at the focus position, and the collection is finished. The nook closing member is outwards pulled out, and the notch removes towards the needle tubing in promptly, and at this moment, the sealed section of thick bamboo remains motionless throughout, in the in-process of continuously pulling out the nook closing member, the notch removes to annular gland 12 gradually, until the annular gland completely seals the notch. And in order to ensure that the notch on the stylet is just sealed by the annular sealing sleeve, scale marks can be arranged on the small-diameter section of the stylet 2, so that whether the notch is sealed or not is judged.

Furthermore, in order to facilitate the large diameter section of the stylet to smoothly enter the closed tube 9 or the annular sealing sleeve, the joint of the large diameter section and the small diameter section of the stylet is an arc-shaped surface, the opening of the closed tube 9 facing the large diameter section of the stylet is a necking, and meanwhile, the end surface of the annular sealing sleeve 12 facing the large diameter section of the stylet is an inclined surface inclined towards the closed tube, so that the large diameter section of the stylet can more smoothly enter the annular sealing sleeve 12 (or the closed tube 9).

Furthermore, in order to make the human tissue fluid enter the needle tube 1, an annular sealing gasket 13 is arranged on the inner wall of the needle tube 1 close to the needle point, and the inner ring of the annular sealing gasket 13 is contacted with the side wall of the needle core 2. When the needle core 2 does not extend out of the needle tube 1, the annular sealing gasket 13 is close to the needle point of the needle core 2, namely, the annular sealing gasket 13 seals the notch in the needle tube. When the biopsy needle disclosed by the utility model is used, only the needle core needs to be pushed and pulled out.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A biopsy needle comprises a needle tube (1) and a needle core (2) arranged in the needle tube (1), and is characterized in that: the one end of needle tubing (1) is the needle point, and another pot head is equipped with sleeve pipe (3), be provided with spring (4) in sleeve pipe (3), the one end of nook closing member (2) is passed spring (4) stretch out sleeve pipe (3) outer and be fixed with limiting plate (5), are close to the other end of nook closing member (2) notch (6) have been seted up on the lateral wall of nook closing member (2), are close to set up fixture block (7) that several and spring (4) offset on the lateral wall of nook closing member (2) of limiting plate (5).

2. A biopsy needle according to claim 1, wherein: the bottom of the notch (6) is arranged in a concave mode.

3. A biopsy needle according to claim 1, wherein: a plurality of stop blocks (8) are arranged on the inner wall of the sleeve (3), one end of the spring (4) is abutted against the end face of the needle tube (1), and the other end of the spring is abutted against the stop blocks (8).

4. A biopsy needle according to claim 2, wherein: the utility model discloses a needle core, including nook closing member (2), notch (6), needle core (2) are divided into big footpath section and path section, notch (6) set up on big footpath section, the cover is equipped with closed tube (9) on the path section of nook closing member (2), a tip part of closed tube (9) stretches into in needle tubing (1), and the other end is fixed with baffle (10) and offsets with the port of sleeve pipe (3), set up bar hole (11) that supply fixture block (7) to pass on the lateral wall of closed tube (9).

5. A biopsy needle according to claim 4, wherein: one end of the strip-shaped hole (11) penetrates through the baffle (10), and the hole penetrating through the baffle (10) is larger than the clamping block (7).

6. A biopsy needle according to claim 4, wherein: an annular sealing sleeve (12) is arranged on the inner wall of the closed pipe (9) close to the pipe orifice.

7. A biopsy needle according to claim 6, wherein: the length of the annular sealing sleeve (12) is greater than that of the notch (6).

8. A biopsy needle according to claim 1, wherein: an annular sealing gasket (13) is arranged on the inner wall of the needle tube (1) close to the needle point of the needle tube, and the inner ring of the annular sealing gasket (13) is in contact with the side wall of the needle core (2).

9. A biopsy needle according to claim 8, wherein: when the needle core (2) does not extend out of the needle tube (1), the annular sealing gasket (13) is close to the needle point of the needle core (2).

10. A biopsy needle according to claim 9, wherein: the small-diameter section of the needle core (2) is provided with scale marks.