SU1364323A1 - Venoextractor - Google Patents

Abstract

This invention relates to medicine. To prevent axial displacement of the knife during extirpation of veins of different diameters, the device contains a tapered knife 1, a core conductor 2 and olive 3. The tapered knife 1 is made in the form of two cones truncated with through channels, the bases of which are of different sizes with sharp edges, and at the intersection a hole whose diameter is less than the diameter of the removable olive 3. 2 Il.

Description

(L

from 05 4

WITH

with

The invention relates to medicine, namely to devices for removing varicose veins of the lower extremities.

The purpose of the invention is the prevention of axial displacement of the knife during extirpation of veins of different diameters.

FIG. 1 shows the venous extractor; in fig. 2 - the same in work.

The device will hold the tapered knife 1, the conductor rod 2 and the olive 3. The tapered knife 1 is made in the form of two cones truncated with through channels, the bases of which have diameters D and DI of different sizes with sharp edges, and an opening d is formed at the intersection (connection) of them : whose diameter is less than the diameter d of the olive. Olives 3 are removable.

The device works as follows.

After intersection of the great saphenous vein at the place of inflow into the deep one and release of its proximal end in the area of 5-7 cm in length, the wall of the vein near the end is stitched with a nylon thread (Fig. 2). An olive rod 3 is held in the distal vein lumen to the required depth in the distal direction. To prevent the outflow of blood from the vein lumen, the previously isolated proximal part is pressed by a clamp. The tapered knife 1 advances onto the free end of the conductor rod 2 protruding from the vein, and the thread is pulled through the opening di of the knife 1 at both ends.

Then olive 3 is screwed onto the proximal end of the vein from the vein 2, the free end of the vein is pulled on olive 3 by the pull of the ligature, the thread is tied on the vein stump. At this point, the operation of the stem 2 with both olives 3 is in the vein lumen, and the vein is inside the cone knife 1, the ligature on the proximal vein stump prevents blood from flowing out of the vein lumen and acts as a holder (the length of the thread must be several centimeters longer than a segment of a vein, gauze tupfer can be attached to its free end).

The skin is cut through the first (distal) olive 3, determined by palpation, usually in the lower third of the thigh or the upper third of the tibia. The vein intersects, a hemostatic forceps are applied to the distal stump, the proximal cult is threaded onto the stem 2 near the olive 3. Distal olive 3 is gripped by a handle (not shown). This concludes the first stage of the operation, the preparatory one.

The removal of the vein is carried out by intermittently moving the knife 1 by the handle (Fig. 2). With the beginning of the movement of the knife 1, the vein is cut around the circumference and is submerged under the cone. The moment of filling the cavity of the cutting cone is felt due to the increased resistance to movement of the knife 1. The further movement of the knife 1 is temporarily suspended. The surgeon's assistant fixes the knife 1 in place by pressing it with a finger through the skin. The operator returns the handle 2-3 cm in the opposite direction. At the same time, the second (proximal) olive 3 extends from the cutting cone and opens the hole di of the knife 1. Using a free hand, the operator or assistant, pulling the holder-ligature in the proximal direction, moves the cut part of the vein from under the cone to the tunnel formed under the skin . To continue the operation, it is necessary, releasing the grip (thread), again to pull the handle (not shown) in the distal direction until the perceived increase in resistance. And so several times, depending on the length of the vein segment to be removed.

5 Upon completion, the vein remains free lying in the subcutaneous wound canal and serves as a substrate on which blood clots are poured out, drained from the lumen of the great saphenous vein and its collaterals. It is necessary to press the skin over the wound channel for a short time to stop the bleeding. Removing a cut vein can be performed through either of two wounds: through the proximal, pulling the thread, or through the distal wound, passing gauze tupfer through the subcutaneous

5 wound channel.

When using the proposed device, traumatization of the soft tissues of the vein bed is reduced, the physician's physical effort decreases when the vein is removed, veins of different diameters can be removed with a single knife. In this case, the device is characterized by simplicity of design and manufacture.

0

Claims (1)

Invention Formula 45 A veno extractor containing a conductor rod with an olive and a tapered knife, distinguished by the fact that, in order to prevent axial displacement of the knife during extirpation of veins of different diameters, it is equipped with 50 additional conical knives, and the blades are made truncated with through channels whose diameters are smaller than the diameter olives are connected by vertices, and their bases have different diameters, while the olive is made removable. FIG. g