CN115211906A

CN115211906A - Suction biopsy needle

Info

Publication number: CN115211906A
Application number: CN202211022753.3A
Authority: CN
Inventors: 胡立力; 孙洪荣; 郑枫; 何先东
Original assignee: Shanghai Ace Medical Technology Co ltd
Current assignee: Shanghai Ace Medical Technology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-10-21

Abstract

The invention belongs to the technical field of medical instruments, and discloses a suction biopsy needle which comprises a needle cylinder and a piston arranged in the needle cylinder, wherein an injection port of the needle cylinder is sleeved with an outer needle. According to the invention, the top cover at the top of the needle cylinder is taken down, the through groove is separated from the limit constraint of the top cover, after the focus position is locked, the sliding block is pulled to drive the piston to slide upwards in the inner cavity of the needle cylinder, so that the piston drives the inner needle to move backwards along the needle wall of the outer needle, and then the negative pressure can suck the focus tissue of a patient into the inner needle, and after sampling is completed, the sampling tissue is pushed out from the needle point of the inner needle.

Description

Suction biopsy needle

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a suction biopsy needle.

Background

The suction biopsy needle is a medical instrument commonly used in the medical field, is used for performing biopsy sampling on tissues and cells at a focus in a patient body, is used for subsequent examination, and has the advantages of light weight, small damage and small risk.

However, in the prior art, the biopsy needle is relatively complex in structure, the piston is driven to draw the focus tissue or the living cells to the sampling position by the aid of the negative pressure generated by the piston when the spring is released, the spring is instantly released, certain vibration is caused by impact in the process of the spring assignment, an operator cannot conveniently control the posture of the puncture needle, and other existing automatic negative pressure biopsy needles are relatively complex in structure and high in cost.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the background art, and an object of the present invention is to provide a suction biopsy needle.

In order to achieve the above purpose, the invention provides the following technical scheme: the suction biopsy needle comprises a needle cylinder and a piston arranged in the needle cylinder, wherein an injection port of the needle cylinder is sleeved with an outer needle, an inner needle is sleeved in the outer needle, the inner end of the inner needle is fixedly connected with the piston, the needle cylinder is provided with a through groove, the inner side of the through groove is slidably provided with a sliding block, and the sliding block is fixedly connected with the inner needle;

the through groove comprises a sliding groove and a limiting protrusion, a clamping groove is formed in the sliding block, the sliding block is initially located in the sliding groove, and the sliding block slides upwards along the sliding groove to enable the limiting protrusion to be clamped into the clamping groove to limit the sliding block.

Preferably, the through groove further comprises a containing groove, when the limiting protrusion is clamped into the clamping groove, the upper portion of the sliding block is clamped into the inner side of the containing groove, and the bottom of the containing groove is a plane.

Preferably, the through groove is designed to penetrate upwards on the needle cylinder, and the top of the needle cylinder is divided into two halves by the through groove.

Preferably, a top cover is installed on the top of the syringe.

Preferably, the outer surface of the outer needle is provided with three step structures with different diameters.

Preferably, the aspiration biopsy needle may be used after the inner needle is detached.

The invention has the following beneficial effects:

according to the invention, the top cover at the top of the needle cylinder is taken down, the through groove is separated from the limit constraint of the top cover, after the focus position is locked, the sliding block is pulled to drive the piston to slide upwards in the inner cavity of the needle cylinder, so that the piston drives the inner needle to move backwards along the needle wall of the outer needle, the focus tissue of a patient can be sucked and embedded into the inner needle by negative pressure, if the sliding block continues to move upwards, the limiting bulge is clamped by the clamping groove, the sliding block is limited by the limiting bulge, the sliding block can not continue to move upwards, and the sampling can be also finished. When the tissue sample needs to be taken down, the top cover is only required to be detached, the sliding block is pushed to the bottom, and the sampled tissue is pushed out from the needle point of the inner needle.

Drawings

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

FIG. 2 is an enlarged view of the receiving groove of the present invention;

FIG. 3 is a schematic view of the present invention with the top cover removed;

FIG. 4 is a sectional view of the inner needle of the outer needle of the present invention.

In the figure: 1. a needle cylinder; 2. a through groove; 21. a chute; 22. a limiting bulge; 23. a receiving groove; 3. a piston; 4. an outer needle; 5. an inner needle; 6. a slider; 61. a card slot; 7. and a top cover.

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.

As shown in fig. 1 to 4, an embodiment of the present invention provides a suction biopsy needle, including a needle cylinder 1 and a piston 3 disposed inside the needle cylinder 1, wherein an injection port of the needle cylinder 1 is sleeved with an outer needle 4, the inner part of the outer needle 4 is sleeved with an inner needle 5, an inner end of the inner needle 5 is fixedly connected with the piston 3, the needle cylinder 1 is provided with a through groove 2, the inner side of the through groove 2 is slidably mounted with a slider 6, and the slider 6 is fixedly connected with the inner needle 5;

the through groove 2 comprises a sliding groove 21 and a limiting protrusion 22, a clamping groove 61 is formed in the sliding block 6, the sliding block 6 is initially positioned in the sliding groove 21, the sliding block 6 slides upwards along the sliding groove 21 to enable the limiting protrusion 22 to be clamped in the clamping groove 61 to limit the sliding block 6, in addition, finger grooves conforming to human engineering are further formed in the bottoms of the two ends of the sliding block 6, fingers of an operator can be buckled in the finger grooves, and stability and comfort are enhanced;

the working principle and the beneficial effects of the technical scheme are as follows: through pulling slider 6 backward, thereby piston 3 upwards slides in the inner chamber of cylinder 1, thereby make piston 3 drive interior needle 5 along the needle wall rearward movement of outer needle 4, constitute the negative pressure cavity between outer needle 4 and the interior needle 5, then the negative pressure cavity can hold the focus department tissue of patient and imbed in interior needle 5, and slider 6 moves up draw-in groove 61 can be blocked by spacing arch 22, thereby make spacing arch 22 spacing slider 6, prevent to lead to interior needle 5 to resume the normal position because of the effect of negative pressure slider 6. In addition, the hub of the outer needle 4 is transparent, and when the suction biopsy needle is used with or without the inner needle 5 detached, whether tissue cells are sucked up can be observed through the transparent hub of the outer needle 4.

The through groove 2 further comprises a containing groove 23, when the limiting protrusion 22 is clamped into the clamping groove 61, the upper part of the sliding block 6 is clamped into the inner side of the containing groove 23, and the bottom of the containing groove 23 is a plane;

the working principle and the beneficial effects of the technical scheme are as follows: the widest part of the receiving groove 23 is the same as the width of the sliding groove 21, so that the receiving groove 23 can receive the top of the sliding block 6, the top of the receiving groove 23 penetrates through the top of the syringe 1, the bottom of the receiving groove 23 is designed to be a plane so as to firmly clamp the clamping groove 61 and prevent the clamping groove 61 from falling, and the top of the receiving groove 23 is designed to be inwardly convergent so as to prevent the sliding block 6 from upwardly penetrating through the receiving groove 23.

Wherein, the through groove 2 is designed to penetrate upwards on the needle cylinder 1, and the top of the needle cylinder 1 is divided into two parts by the through groove 2;

the working principle and the beneficial effects of the technical scheme are as follows: with logical groove 2 at the top of running through to cylinder 1, can let the top of cylinder 1 be the separation state, then can directly regulate and control the width of spacing arch 22 to the control of the distance of the top two halves of cylinder 1, it is spacing to make draw-in groove 61 block go into spacing arch 22 or make draw-in groove 61 break away from spacing arch 22 more easily.

Wherein, the top of the needle cylinder 1 is provided with a top cover 7;

the top cover 7 of the present invention can be realized in various ways, for example, the top cover can be connected with the cylinder body in a snap-fit manner, and the top cover can also be connected with the cylinder body through a thread structure. After the cap is detached from the can, a portion of the cap can remain attached to the can.

The working principle and the beneficial effects of the technical scheme are as follows: top cap 7 installs the top at cylinder 1, the top of cylinder 1 that will be divided into the two halves by logical groove 2 covers, draw together two halves cylinder 1 to the centre, prevent to prop and part owing to the shore of logical groove 2 inboard slider 6, lead to the unstable problem of slider 6 joint, after the inside of draw-in groove 61 is blocked into to spacing arch 22, only dismantle back with top cap 7, draw-in groove 61 just can break away from spacing arch 22, slider 6 is at the in-process of rebound, because the top of spout 21 is the curved surface, consequently draw-in groove 61 can directly be blocked in spacing arch 22, spacing arch 22 and draw-in groove 61 block accomplish after again with top cap 7 installation at the top of cylinder 1 can.

Wherein, the outer surface of the outer needle 4 is provided with three step structures with different diameters, and the three step structures are arranged to facilitate puncture intervention and negative pressure absorption sampling.

The working principle and the using process are as follows:

through pulling slider 6 backward to piston 3 drives interior needle 5 and moves backward along the needle wall of outer needle 4, and then the negative pressure cavity can be with the focus department tissue of patient suck and be embedded into interior needle 5, and slider 6 rebound draw-in groove 61 can be blocked by spacing arch 22, thereby it is spacing with slider 6 to make spacing arch 22, only need dismantle top cap 7 when needing to take off the tissue sample, promote slider 6 to the bottom, the sample tissue is followed the needle point of interior needle and is pushed out can. For the operator, the slider can continue the rebound draw-in groove, can block spacing arch this moment to make spacing arch spacing with the slider, the operator also can operate the slider and not continue rebound, also can accomplish the sample equally.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Suction biopsy needle, including syringe (1) and set up piston (3) inside syringe (1), its characterized in that: an injection port of the needle cylinder (1) is sleeved with an outer needle (4), an inner needle (5) is sleeved inside the outer needle (4), the inner end of the inner needle (5) is fixedly connected with the piston (3), the needle cylinder (1) is provided with a through groove (2), a sliding block (6) is installed on the inner side of the through groove (2) in a sliding mode, and the sliding block (6) is fixedly connected with the inner needle (5);

lead to groove (2) including spout (21) and spacing arch (22), draw-in groove (61) have been seted up on slider (6), slider (6) are initially located spout (21) and slider (6) slide upwards along spout (21) and make spacing arch (22) card go into draw-in groove (61) and realize spacing to slider (6).

2. The aspiration biopsy needle of claim 1, wherein: lead to groove (2) still including accomodating groove (23), during spacing arch (22) card goes into draw-in groove (61), the inboard of accomodating groove (23) is gone into to the upper portion card of slider (6), the bottom of accomodating groove (23) is the plane.

3. The aspiration biopsy needle of claim 1, wherein: the through groove (2) is designed to penetrate upwards on the needle cylinder (1), and the top of the needle cylinder (1) is divided into two parts by the through groove (2).

4. The aspiration biopsy needle of claim 1, wherein: the top of the needle cylinder (1) is provided with a top cover (7).

5. The aspiration biopsy needle of claim 1, wherein: the outer surface of the outer needle (4) is provided with three sections of step structures with different diameters.

6. The aspiration biopsy needle of claim 1, wherein: the aspiration biopsy needle can be used after detaching the inner needle (5).