RU13314U1 - PUNCH NEEDLE - Google Patents

Abstract

A puncture needle comprising a body, an external needle with a cutting edge, and an internal stitching needle with a working part for gripping biopsy material, made with the possibility of reciprocating movement along the longitudinal axis of the body, characterized in that the needle is equipped with a locking device for fixing the external needle before starting the operation in the working position and the spring mechanism for the operational advancement of its cutting edge relative to the working part of the inner needle when cutting the fabric.

Description

PUNCH NEEDLE

The utility model relates to medical equipment and can be used for intravital diagnostic puncture nephrobiopsy in a closed way.

Known puncture needle containing a housing, an external needle with a cutting edge and an internal stitching needle with a working part for gripping biopsy material, made with the possibility of reciprocating movement along the longitudinal axis of the body, (A.S. JV 400309 1973, No. 1050696, А61В, 1983; US Prospectus Monoject. ABC Actuated Biopsy Cutting).

Multidirectional movements at the moment of moving the outer needle along the inner needle create the inconvenience of using the tool, as When moving without emphasis on weight, needle displacement and organ injury can occur.

The purpose of the utility model is to reduce injuries to organs during puncture by increasing the reliability of the functioning of the puncture needle.

This goal is achieved in that in a puncture needle containing a body, an external needle with a cutting edge and an internal stitching needle with a working part for gripping biopsy material, made with the possibility of reciprocating movement along the longitudinal axis of the body, the needle is equipped with a locking device for fixing the outer needle in the working position before the start of operations and the spring mechanism for the operational advancement of its cutting edge relative to the working part of the inner needle when cutting tissue.

MPK A61V

The device has a housing 1, an external hollow needle 2 with a cutting edge at the free end, inside of which there is an internal stabbing needle 3, on which a recess 4 is made to capture biopsy material. On the outer part of the housing 1 there are two threaded sleeves 5, restricting the advancement of the outer needle 2 forward when taking the sample and advancing the inner needle 3 backward when setting it in the working position before the operation. On the body of the outer needle 2 there is an annular groove 6, designed to fix the needle in the rear position. On the front of the needle 2 there is a pusher 5, when pressed, the needle moves back. On the housing 1, a locking device 8 is made, consisting of a dog with a spring 9 and an axis 10, which holds the outer needle 2 in the rear position. Inside the housing 1 is placed a spring 11, designed to feed the outer needle 2 forward when taking tissue from the kidney. In the back of the inner needle 3 there is a pusher 12, designed to divert the needle 3 into the rear position before starting the operation and moving forward, when pressed, at the moment of penetration into the tissue.

Work the needle trace in a skinny manner.

The needle is brought into working condition, for which the outer needle 2 is pushed back with an effort by the pusher 7 until it stops and is fixed by the locking device 8. The inner needle 3 is pushed back 12 without effort by the pusher 12. A working needle is inserted into the patient's body until the surface of the kidney is reached. Then, with the intense movement of the pusher 12, the inner needle 3 is inserted into the tissue of the kidney. Pressing the button of the locking device 8, release the spring 9, under the action of which the outer needle 2 is pushed and cuts the kidney tissue, leaving the kidney tissue in the recess 4 of the inner needle 3. Then the needle is removed from the patient’s body. When pressing the pusher 7, the outer needle 2 is pulled back and a piece of kidney tissue is removed from the recess 4 of the inner needle.

the proposed needle for percutaneous puncture nephrobiopsy is much more reliable and easier to use compared to the known ones. When using the proposed needle creates the opportunity to work without

special physical efforts, the time of the procedure is reduced, the possibility of needle displacement in the kidney parenchyma is excluded, which reduces organ trauma. Using this needle, 94 diagnostic nephrobiopsies were successfully performed.

Authors A.S. Khayrullov

Z.S. Gaiyullin

Claims (1)

A puncture needle comprising a body, an external needle with a cutting edge, and an internal stitching needle with a working part for gripping biopsy material, made with the possibility of reciprocating motion along the longitudinal axis of the body, characterized in that the needle is equipped with a locking device for fixing the external needle before starting the operation in the working position and the spring mechanism for the operational advancement of its cutting edge relative to the working part of the inner needle when cutting the fabric.