CN219578985U

CN219578985U - Negative pressure suction puncture outfit

Info

Publication number: CN219578985U
Application number: CN202320601654.4U
Authority: CN
Inventors: 戴欣媛; 王莹
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: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-25
Anticipated expiration: 2033-03-24

Abstract

The negative pressure suction puncture outfit comprises a needle cylinder, a piston and a piston rod, wherein the piston is fixedly connected with the proximal end of the piston rod and penetrates through the needle cylinder, the upper end of the piston is further provided with a spiral ring, and the spiral ring is fixedly connected with the outer wall of the piston rod; the inner wall of the needle cylinder is provided with an internal thread corresponding to the coil. The negative pressure suction puncture outfit changes the traditional mode that the piston rod is pulled to form negative pressure, and the piston rod is fixed to continuously maintain the negative pressure, so that the puncture precision is improved; the operator can keep pen holding in the whole process during puncturing, so that the puncturing precision is improved, and the damage to non-target tissues of the puncturing point is avoided; the puncture suction process can be operated by a single person and one hand, so that the working efficiency is improved.

Description

Negative pressure suction puncture outfit

Technical Field

The utility model relates to the field of medical instruments, in particular to a negative pressure suction puncture outfit.

Background

Thyroid nodule and lymph node fine needle puncture under ultrasound guidance are diagnostic operations which are frequently performed in clinic. The operation is conducted under the guidance of ultrasound, the 22G syringe needle is utilized to puncture suspicious thyroid nodules and lymph nodes, and a proper amount of cells are sucked for further cytological examination or gene detection.

In order to obtain a sufficient test sample, the healthcare worker needs to maintain a negative pressure state at the time of lancing. Conventional syringes cannot self-maintain negative pressure and therefore require the operator to continuously withdraw the plunger shaft while lancing. For thyroid nodules or lymph nodes with smaller volumes or adjacent large blood vessels, in order to obtain sufficient materials and avoid damaging surrounding blood vessels, operators often use pen holding, and use relatively flexible thumb, index finger and middle finger to accurately control the puncturing direction. However, if negative pressure is required to be maintained to suck tissues, pen holding cannot be adopted, which often leads to inaccurate puncture, influences the material drawing and even damages surrounding important structures.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a negative pressure suction puncture outfit;

in order to achieve the above purpose, the utility model adopts the following technical scheme: the negative pressure suction puncture outfit comprises a needle cylinder, a piston and a piston rod, wherein the piston is fixedly connected with the proximal end of the piston rod and penetrates through the needle cylinder, the upper end of the piston is further provided with a spiral ring, and the spiral ring is fixedly connected with the outer wall of the piston rod;

the inner wall of the needle cylinder is provided with an internal thread corresponding to the coil.

Preferably, the internal thread is located above the upper third of the needle cylinder.

Preferably, the diameter of the coil is not smaller than the diameter of the piston.

Preferably, the coil comprises an outer ring and an inner ring, which are fixedly connected with the piston rod through the inner ring.

Preferably, the outer ring is a metal ring or a plastic ring.

Preferably, the inner ring is a rubber ring or a silica gel ring.

Preferably, the distal end of the piston rod is provided with a straight handle.

Compared with the prior art, the utility model has the beneficial effects that: 1. the negative pressure suction puncture outfit changes the traditional mode that the piston rod is pulled to form negative pressure, and the piston rod is fixed to continuously maintain the negative pressure, so that the puncture precision is improved;

2. the operator can keep pen holding in the whole process during puncturing, so that the puncturing precision is improved, and the damage to non-target tissues of the puncturing point is avoided;

3. the puncture suction process can be operated by a single person and one hand, so that the working efficiency is improved.

Drawings

FIG. 1 is a schematic view of the structure of a negative pressure suction puncture needle cylinder according to the present utility model;

FIG. 2 is a schematic view of the structure of the piston rod of the cylinder of the negative pressure suction puncture outfit according to the utility model;

FIG. 3 is a top view of the negative pressure aspiration puncture device cartridge coil of the present utility model;

fig. 4 is a sectional view of the negative pressure suction puncture needle cylinder according to the present utility model.

Detailed Description

For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.

Referring to fig. 1-4, the negative pressure suction puncture outfit according to an embodiment of the utility model comprises a needle cylinder 1, a piston 2 and a piston rod 3, wherein the piston 2 is fixedly connected with the proximal end of the piston rod 3 and is penetrated in the needle cylinder 1, the upper end of the piston 2 is also provided with a coil 4, and the coil 4 is fixedly connected with the outer wall of the piston rod 3;

the inner wall of the needle cylinder 1 is provided with an internal thread 7 corresponding to the screw ring 4.

Preferably, the internal thread 7 is located above the upper third of the needle cylinder 1.

Preferably, the diameter of the coil 4 is not smaller than the diameter of the piston 2.

Preferably, the coil 4 comprises an outer ring 5 and an inner ring 6, which are fixedly connected to the piston rod 3 by means of the inner ring 6.

Preferably, the outer ring 5 is a metal ring or a plastic ring.

Preferably, the inner ring 6 is a rubber ring or a silicone ring.

Preferably, the distal end of the piston rod 3 is provided with a straight handle. Compared with the tail end of the circular piston rod 3 of the traditional syringe, the straight handle can be convenient for a user to rotate, the operation is labor-saving, and the phenomenon that a needle is shaken to touch other body tissues by mistake is avoided.

From the above, when the puncture needle of the negative pressure suction puncture outfit of the utility model is punctured, an operator punctures the needle point on the syringe 1 into the thyroid nodule and the lymph node edge, pulls the piston rod 3 until the coil 4 reaches the internal thread 7 on the inner wall of the syringe 1, and then rotates the piston rod 3 to fix the position of the piston rod 3, thereby maintaining the negative pressure in the puncture outfit. Then the target nodule and lymph node are punctured by pen holding. After the puncture is completed, the puncture outfit is pulled out, the piston rod 3 is rotated in the opposite direction, and the piston rod 3 is pushed to collect the specimen.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The negative pressure suction puncture outfit comprises a needle cylinder (1), a piston (2) and a piston rod (3), wherein the piston (2) is fixedly connected with the proximal end of the piston rod (3) and is penetrated in the needle cylinder (1), and the negative pressure suction puncture outfit is characterized in that: the upper end of the piston (2) is also provided with a coil (4), and the coil (4) is fixedly connected with the outer wall of the piston rod (3);

the inner wall of the needle cylinder (1) is provided with an internal thread (7) corresponding to the spiral ring (4).

2. The negative pressure aspiration puncture device of claim 1, wherein: the internal thread (7) is located at the middle upper third of the needle cylinder (1).

3. The negative pressure aspiration puncture device of claim 1, wherein: the diameter of the coil (4) is not smaller than the diameter of the piston (2).

4. The negative pressure aspiration puncture device of claim 1, wherein: the spiral ring (4) comprises an outer ring (5) and an inner ring (6), and the spiral ring is fixedly connected with the piston rod (3) through the inner ring (6).

5. The negative pressure aspiration puncture device of claim 4, wherein: the outer ring (5) is a metal ring or a plastic ring.

6. The negative pressure aspiration puncture device of claim 4, wherein: the inner ring (6) is a rubber ring or a silica gel ring.

7. The negative pressure aspiration puncture device of claim 1, wherein: the far end of the piston rod (3) is provided with a straight handle.