SU1377060A1 - Arrangement for biopsy - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is the preservation of the microstructure of the biopsy. The device comprises a cannula 1 with an oblique sharpened cut and a handle 3, a mandrel with a handle 5, a cutting element and a relative orientation unit. The cutting element is made in the form of a flexible thread 7. The working end of the needle 1 has a groove 8. The relative orientation unit is made in the form of parallel stops 10 of the handle 3 and the skirt 11. The thread 7 is located at the top of the cut and in the slot 8. Complete with the device use electrocoagulum and harpoon. When using the device, traumatization of biological tissue is reduced. 8 il.

Description

FIG. one

(L

her

The invention relates to medical technology, in particular to devices for puncture biopsy.

The purpose of the invention is the preservation of the microstructure of the biopsy.

FIG. 1 shows a device for biopsy assembly, front view; in fig. 2 — node I in FIG. one; in fig. 3 - the device, top view; in fig. 4 — node II in FIG. 3; in fig. 5 - needle device; in FIG. 6 - mandrin; in fig. 7 - electrocoagulant; in fig. 8 - harpoon.

The biopsy device comprises a cannula 1 with an oblique sharpened cut 2 at the working end and a handle 3 at the opposite end, a mandrel 4 with a handle 5 and an oblique cut 6 at the working end, a cutting element and an orientation unit.

The cutting element is designed as a flexible part 7, the working end of the needle 1 has a groove 8 with an angle of inclination cz 75-105 ° to the oblique cut 2 and a hole 9 made at the cutting edge 2. The relative orientation unit is made in the form of parallel stops 0 handles 3 and shafta 11 on its side surface and the holes 12 parallel to the longitudinal axis in the handle 5 mandrel 4 and the guide 13 placed on it with the figured groove 14 and the elastic retainer 15, the thread 7 is placed with the middle part in the hole 9 at the top slice 2 and in groove 8, and the free ends of the thread may be behind Replays latch 15.

The device is equipped with an electrocoagulant 16 and a harpoon 17.

Use the device as follows.

Bending the thread 7 covers mandrel 4 opposite the inclined groove 8 inside the needle 1, and its ends pass through the holes 9 and 18 and the end of the guide 13 and are wound with three turns around the elastic lock 15 of the guide 13. This elastic lock presses the flexible thread 7 to the handle 5 and thus fixes the position of the ends of the flexible thread 7.

In order to take biological tissue for histological analysis, appropriate processing and anesthesia of the selected skin area are performed and the working end of the device is carried out directly to the biopsy zone. When assembled, the ends of oblique cuts at the working ends of needle i and mandrel 4 coincide, and the mandrel 4 core completely covers the internal canal of needle 1.

Then the mandrel 4 is retracted by the handle 5 back until the edge of the groove 14 is seated on the pin 11. At the same time, it is necessary to ensure that the pin 11 slides along the lateral surface 19 of the guide 13 all the time. and the handle 5 is fed forward until it touches the stops 10. This closes the bayonet lock formed by the pin 11 and the groove 14. After that, the device is inserted to the required depth, oriented along the side

on the outer surface of the needle 1. Then move the handle 5 back and rotate it counterclockwise until the pin 11 moves beyond the groove 14. Continuing to hold the needle 1 motionless, pull the mandrel 4 out of the handle 5. The working loop of the flexible thread 7 is released after passing the end of mandrel 4 of the inclined groove 8 of the needle 1. In the process of its translational motion, the mandrel 4 pulls the flexible thread 7 connected with the guide 13 of its handle 5. The working loop of the flexible thread 7 slides along the front edge of the inclined groove 8 and the outer surface of the needle 1 in thoron its tip end, and a bending zone 9 openings thread 7 cuts the base biopsy finds schego0 from inside the needle 1. Harpoon 17 is removed from the biopsy needle 1 and sends out it to histological analysis. Then, the electrocoagulant 16 produces antiblastic and extracts the needle 1.

5 The optimal angle of the inclined groove 8 with the axis of the needle 1 is the angle at which the angle formed by the surface of the inclined groove 8 and the surface of the oblique cut 2 of the needle 1, and 75-115 °.

To refill the flexible yarn 7 into the device

0 it is necessary to fold the thread in half, thread the ends of the thread into the hole 9 of the needle 1 from the side of the oblique cut section 2, leaving a loop of 5-8 cm, and then through the hole 18 of the handle 3, wrap the thread around the pin 11, winding three turns clockwise

5 arrow, and fix with a finger, then fill the working loop of the flexible thread 7 into the inclined groove 8 of the needle 1, insert the inside of the needle 1 of the mandrel 4, turning its plane of the oblique cut at the working end by 180 ° relative to the oblique cut of the 2 needles 1, after passing with the working end of the mandrel of the loop of the flexible thread 7, turn the mandrel 4 around its axis clockwise 180 °, release the ends of the thread 7 and stretch them to the working end of the needle 1 until the slack is chosen

5 loops of the flexible thread 7, while skipping the ends of the flexible thread 7 to the left of the pin 11 of the handle 3, if you look at the handle 3 of the needle 1 at the back, push the mandrel 4 forward until tight contact of the handle 3 and 5 of the handle, That the stops 10 of the handle 3 enter the hole 12 of the handle 5 of the mandrel 4, skip the ends of the thread 7 into the recess at the front end of the guide 13 and apply three turns clockwise on the elastic retainer 15, the free ends of the elastic thread 7

5 at a distance of 1-2 cm from the retainer 15 cut off.

Since the needle walls have a minimum thickness due to the requirements of

0

strength, and the working loop of the flexible thread cuts the biopsy sample column at the needle end, traumatization of the biological tissue is reduced. Since the cutting knife is replaced by a flexible thread, the metal consumption of the structure is reduced. In addition, the safety of the sample for histological analysis is enhanced, since when it is taken, there is minimal disruption of the biological structure due to the fact that cutting elements make only translational movements.

Claims (1)

Invention Formula A biopsy device comprising a cannula with an oblique sharpened cut at the working end and a handle at the opposite end, a mandrel with a handle and an oblique cut at the working end, a cutting element and an orientation unit, characterized in that, in order to preserve the microstructure of the biopsy, the cutting element is made in the form of a flexible thread, the working end of the needle has a groove with an angle of 75-105 ° to the oblique shear and a hole made at the top of the shear, and the relative orientation unit is made in a zile parallel to the longitudinal axis of the handle stops and the pin on its side surface and the holes parallel to the longitudinal axis in the handle of the mandrel and the guide placed on it with a figured groove and elastic a clamp, with the thread placed in the middle part in the hole at the top of the slice and in the groove, and its free ends can be fixed with a clamp. 75 FIG. 2 Vus.3 FIG. If Fi.g.1 (Rig.5 Have FIG. 6 sixteen Fi.in