CN219070409U

CN219070409U - Quick-dismantling bone marrow puncture needle

Info

Publication number: CN219070409U
Application number: CN202222677365.0U
Authority: CN
Inventors: 李俊霞; 吴微; 韩婷婷; 周晨
Original assignee: Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Current assignee: Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-05-26
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a quick-dismantling bone marrow puncture needle, which comprises an outer sleeve needle, a biopsy needle lining core and a sleeve needle handle, wherein the biopsy needle lining core is inserted into the outer sleeve needle, a pressure release hole is formed along the axial direction, one end of the biopsy needle lining core is provided with a lining core handle, a movable cavity and a spherical groove which are communicated with the pressure release hole are formed in the lining core handle, and a spherical ball with a smooth surface is arranged in the spherical groove. In the using process, when the biopsy needle lining core is pulled outwards through the pressure release hole formed in the biopsy needle lining core, the ball extrudes the spring, the ball is separated from the spherical groove, external gas enters the pressure release hole through the movable cavity, the direction acting force of negative pressure on the biopsy needle lining core is reduced after the internal gas pressure is balanced, the biopsy needle lining core is conveniently and rapidly taken out from the inside of the outer sleeve needle, and the ball can be manually pressed in the process of taking the biopsy needle lining core, so that the aim of balancing the gas pressure in the pressure release hole with the external is fulfilled, and the biopsy needle lining core is convenient to take out.

Description

Quick-dismantling bone marrow puncture needle

Technical Field

The utility model relates to the technical field of puncture needles, in particular to a quick-dismantling bone marrow puncture needle.

Background

Bone marrow aspiration is a common diagnostic technique for taking bone marrow fluid, the examination contents of which include cytology, protozoa, bacteriology and the like, the traditional bone marrow aspiration needle comprises a hollow outer sleeve needle and a solid biopsy needle lining core, after the outer sleeve needle and the biopsy needle lining core are inserted into a sampled bone marrow area, the biopsy needle lining core is taken out from the outer sleeve needle, then a needle cylinder is inserted into a needle sleeve handle of the outer sleeve needle, the needle cylinder is drawn, and bone marrow is drawn into the needle cylinder under the action of negative pressure; however, a large defect exists in the process of taking out the biopsy needle lining core, and is mainly characterized in that the outer wall of the biopsy needle lining core is attached to the inner wall of the outer sleeve needle in the process of taking out the biopsy needle lining core, after the needle head of the outer sleeve needle is inserted into bone marrow, a negative pressure cavity is formed in the outer sleeve needle in the process of taking out the biopsy needle lining core, a reverse acting force is generated on the biopsy needle lining core which is pulled out outwards, and the negative pressure is increased in the process of taking out the biopsy needle lining core, so that the biopsy needle lining core is not beneficial to being taken out from the outer sleeve needle quickly. Therefore, we propose a quick-dismantling bone marrow puncture needle.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a quick-dismantling bone marrow puncture needle.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a quick detach formula marrow pjncture needle, includes overcoat needle and biopsy needle bush core and trocar handle, biopsy needle bush core is installed in the overcoat needle to the pressure release hole has been seted up along the axial, the bush core handle is installed to biopsy needle bush core's one end, the movable chamber and the ball-type groove with pressure release hole intercommunication have been seted up to the bush core handle, install smooth ball in surface in the ball-type groove, the ball is close to one side in pressure release hole and is provided with the spring of being connected with movable intracavity wall.

Preferably, the aperture of the pressure relief hole is one millimeter.

Preferably, the U-shaped plate is symmetrically arranged on one side, far away from the outer sleeve needle, of the trocar handle, the openings of the two U-shaped plates are opposite, the lining core handle is of an hourglass-shaped structure, and avoidance grooves are symmetrically formed on one side, close to the U-shaped plates, of the trocar handle, and the avoidance grooves are larger than the size of the U-shaped plates.

Preferably, one side of the outer sleeve needle far away from the bushing core handle is connected with an outer sleeve in a threaded manner.

The quick-dismantling bone marrow puncture needle provided by the utility model has the beneficial effects that:

1. when the biopsy needle lining core is pulled outwards through the pressure release hole formed in the biopsy needle lining core, the ball extrudes the spring, the ball is separated from the ball groove, external gas enters the pressure release hole through the movable cavity, the direction acting force of negative pressure on the biopsy needle lining core is reduced after the internal gas pressure is balanced, and the biopsy needle lining core is conveniently and quickly taken out from the inside of the outer sleeve needle.

2. In the process of taking the biopsy needle lining core, the ball can be manually pressed, so that the aim of balancing the air pressure in the pressure release hole with the outside is fulfilled, and the biopsy needle lining core is conveniently taken out.

3. When the bottom card of lining core handle is in the open side of two U template, the lining core handle of this moment is fixed on the trocar handle, makes to dodge the groove and arranges U template side in through rotating lining core handle afterwards, then upwards pulls out lining core handle, alright realize lining core handle's quick split.

Drawings

FIG. 1 is a schematic view of a quick-release bone marrow puncture needle according to the present utility model;

FIG. 2 is a schematic view of a quick-release bone marrow puncture needle according to the present utility model;

FIG. 3 is a schematic diagram showing the structure of a quick-dismantling bone marrow puncture needle avoiding groove and a U-shaped plate according to the utility model;

FIG. 4 is a schematic diagram of an explosive structure of a quick-release bone marrow puncture needle according to the present utility model;

FIG. 5 is a schematic view of a quick release bone marrow puncture needle trocar handle and outer trocar according to the present utility model;

FIG. 6 is a schematic view of a sectional structure of a core and a ball of a biopsy needle and a handle of the core of a quick-release bone marrow puncture needle according to the present utility model;

fig. 7 is a schematic cross-sectional view of a quick-release bone marrow puncture needle core handle and a biopsy needle core according to the present utility model.

In the figure: 1. sleeving a needle; 2. a biopsy needle core; 3. a trocar handle; 4. a core handle; 5. a pressure relief hole; 6. a movable cavity; 7. a spherical groove; 8. a spring; 9. a ball; 10. a U-shaped plate; 11. an avoidance groove; 12. an outer sleeve.

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.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-7, a quick detach formula marrow pjncture needle, including overcoat needle 1 and biopsy needle bush core 2 and trocar handle 3, biopsy needle bush core 2 is installed in overcoat needle 1, and pressure release hole 5 has been seted up along the axial, the bush core handle 4 is installed to the one end of biopsy needle bush core 2, the movable chamber 6 and the ball groove 7 with pressure release hole 5 intercommunication have been seted up to bush core handle 4, install smooth ball 9 in the surface in ball groove 7, one side that ball 9 is close to pressure release hole 5 is provided with the spring 8 with movable chamber 6 inner wall connection, as shown in fig. 6, under the elastic support effect of spring 8, the outer wall and the outer wall laminating of ball groove 7 of ball 9, in the in-process of puncture, the pressure of pressure release hole 5 inside is the malleation, and produce one and with ball 9 to the extruded effort of ball groove 7, when outwards extracting biopsy needle bush core 2, the time, the inside atmospheric pressure of pressure release hole 5 reduces gradually, and when inside negative pressure effort is greater than spring 8's elastic effort, the ball 9 breaks away from between ball groove 7 and ball groove 7, release gas from inside cavity 6 entering into the inside through the movable chamber 6, can be balanced with the outside air pressure release hole 2, the inside needle core 2 is taken out simultaneously, the outside the inside the ball is taken out, the inside the ball is convenient for the ball is taken out to the outside through the inside the ball bush core 2, and the inside is balanced from the inside the pressure release hole 2, the inside the needle is taken out.

The aperture of the pressure relief hole 5 is one millimeter.

The U template 10 is installed to the side symmetry that trocar handle 3 kept away from overcoat needle 1, the opening of two U templates 10 is relative, and core handle 4 is hourglass column structure, and the one side symmetry that is close to U template 10 has been seted up and has been dodged groove 11, dodges the size that groove 11 is greater than U template 10, as shown in fig. 1, when the bottom card of core handle 4 is in the open side of two U templates 10, core handle 4 at this moment is fixed on trocar handle 3, make to dodge groove 11 and place U template 10 side through rotating core handle 4 afterwards, then upwards pull out core handle 4, alright quick split of core handle 4 is realized.

The outer sleeve 12 is connected to one side of the outer sleeve 1 far away from the core lining handle 4 in a threaded manner, and the insertion depth of the outer sleeve 1 can be adjusted through the outer sleeve 12 in threaded connection with the outer sleeve 1.

Working principle and advantages: in the process of puncture, the pressure in the pressure release hole 5 is positive pressure to produce an effort of extruding ball 9 to ball groove 7, when outwards extracting biopsy needle bush 2, the inside atmospheric pressure of pressure release hole 5 gradually reduces this moment, and when the inside negative pressure effort is greater than the elasticity resilience effort of spring 8, break away from between ball 9 and the ball groove 7 this moment, external gas enters into pressure release hole 5 through movable chamber 6, the direction effort of negative pressure to biopsy needle bush 2 has been reduced after balanced inside atmospheric pressure, be convenient for quick taking out biopsy needle bush 2 from the inside of overcoat needle 1, simultaneously at the in-process of getting biopsy needle bush 2, also can manual pressure ball 9, reach pressure release hole 5 internal atmospheric pressure and external balance.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a quick detach formula bone marrow pjncture needle, includes overcoat needle (1) and biopsy needle bush core (2) and trocar handle (3), its characterized in that, biopsy needle bush core (2) are installed in overcoat needle (1) to pressure release hole (5) have been seted up along the axial, bush core handle (4) are installed to the one end of biopsy needle bush core (2), movable cavity (6) and ball-type groove (7) with pressure release hole (5) intercommunication have been seted up to bush core handle (4), install smooth ball (9) in surface in ball-type groove (7), one side that ball (9) are close to pressure release hole (5) is provided with spring (8) with movable cavity (6) inner wall connection.

2. A quick release bone marrow puncture needle according to claim 1, characterized in that the aperture of the pressure relief hole (5) is one millimeter.

3. The quick-dismantling bone marrow puncture needle according to claim 1, characterized in that a U-shaped plate (10) is symmetrically arranged on one side, far away from the outer sleeve needle (1), of the trocar handle (3), openings of the two U-shaped plates (10) are opposite, the bushing core handle (4) is of an hourglass-shaped structure, avoidance grooves (11) are symmetrically arranged on one side, close to the U-shaped plate (10), of the trocar handle (3), and the avoidance grooves (11) are larger than the U-shaped plate (10).

4. The quick-dismantling bone marrow puncture needle according to claim 1, characterized in that one side of the outer sleeve needle (1) far away from the bushing core handle (4) is connected with an outer sleeve (12) in a threaded manner.