RU78059U1 - DEVICE FOR PUNCTION AND DRAINING OF INTRAHEPENIC BILENTAL ducts - Google Patents

Abstract

A device for puncture and subsequent drainage of the intrahepatic bile ducts under ultrasound control in patients with obstructive jaundice refers to medicine, namely to surgery, and can be used in minimally invasive surgery. The technical result of the invention is a reliable puncture and subsequent drainage of the intrahepatic bile ducts under ultrasound control with their small diameter with controlled fixation of the internal puncture needle in the punctured bile duct in an optimal position. The device consists of two coaxially conjugated puncture needles: an outer needle 17.5G 22 cm long, made in the form of a pointed casing with a clamp on the proximal end, and an inner needle 22G 20 cm long with a mandrel with the ability to move around the lumen of the outer needle (Fig. 1) .

Description

The invention relates to medicine, namely minimally invasive surgery, and can be used to treat patients with obstructive jaundice. Currently, the Karl Storz two-part puncture needle is known (Karl Storz Endoskope product catalog urology 6th edition 1/2003), consisting of a 22G thin needle with mandrin (Germany No. 27091 K) and an external blunt cannula (Lot FN01 mr).

However, the disadvantage of the existing device is the lack of puncture sharpening and a clamp at the proximal end of the external cannula.

The technical result of the invention is a reliable puncture and subsequent drainage of the intrahepatic bile ducts under ultrasound control with their small diameter with controlled fixation of the internal puncture needle in the punctured bile duct in an optimal position.

The technical result is achieved by the fact that the working part of the puncture tool is represented by two coaxially paired puncture needles, of which the outer 17.5G 22 cm long is made in the form of a pointed casing and provided with a latch for the inner needle at the proximal end, and the inner 22G needle is 20 cm long hollow with a mandrel and coaxially placed in the lumen of the external needle with the ability to move around the lumen of the external needle for puncture of the intrahepatic bile ducts and subsequent conduct of a commensurate conduction into a punctured streaming system.

The invention is illustrated by the following figure:

FIG. Device for puncture and drainage of the intrahepatic bile ducts.

The device consists of two coaxially conjugated puncture needles: an outer needle 17.5G 22 cm long (1), made in the form of a pointed casing with a clamp (2) at the proximal end, and an inner needle 22G 20 cm long (3) with a mandrin (4 ) with the ability to move around the lumen of the outer needle.

The device operates as follows.

Under ultrasonic control, through the target point, we introduce the proposed device percutaneously into the liver tissue in the assembled state, when the needles are fixed with a retainer relative to each other, and the sharpening planes of both needles are combined. We reach the expanded intrahepatic bile duct. We clearly visualize the tip of the outer needle against the duct wall, release the inner needle from a fixed state, then puncture the duct with the inner needle and fix its position with the retainer to prevent the latter from moving out of the duct. Then we remove the mandrin and introduce a commensurate conductor for further drainage of the stream system.

Thus, the technical result is achieved in that the working part of the puncture tool is represented by two coaxially conjugated puncture needles, of which the outer 17.5G 22 cm long is made in the form of a pointed casing and provided with a latch for the inner needle at the proximal end, and the inner needle 22G long 20 cm is hollow with a mandrin and coaxially placed in the lumen of the external needle with the ability to move around the lumen of the external needle for puncture of the intrahepatic bile ducts and subsequent proportional th conductor into a punctured stream system.

Using the proposed device makes it possible:

1. It is safe to deliver an internal puncture needle of small diameter to the punctured intrahepatic bile duct

due to the coaxial arrangement in the outer casing, represented by a 17.5G needle, due to its greater rigidity and, therefore, better controllability when using the “free hand” technique, which avoids conflict with the vascular structures of the liver.

2. To perform a puncture and subsequent drainage of the intrahepatic bile ducts under ultrasound control in patients with obstructive jaundice with their small diameter comparable with the length of the cut of the internal puncture needle.

3. Create controlled fixation of the internal puncture needle in the punctured bile duct in the optimal position.

Claims (1)

A device for puncture and subsequent drainage of the intrahepatic bile ducts under ultrasound control in patients with obstructive jaundice, consisting of coaxially conjugated puncture needles, characterized in that the working part consists of two needles, of which the outer 17.5G 22 cm long is made in the form of a pointed casing and equipped with a latch for the inner needle at the proximal end, and the inner needle 22G with a length of 20 cm is hollow with a mandrin and coaxially placed in the lumen of the outer needle with the ability to move about the lumen of the external needle for puncture of the intrahepatic bile ducts and subsequent conduct of a proportionate conductor into the punctured stream system.