SU651817A1 - Catheter - Google Patents

Description

(54) CATHETER

one

The invention relates to medical technology and is intended to completely shut off the liver from the bloodstream and create conditions for extracorporeal circulation in it at the time of organ resection.

Ievesten is a catheter designed to shunt and block the outflow of blood from the liver when it is turned off from blood circulation 1.

This catheter has an elastic tube, has branched and unbranched ends, and has holes in the walls. At the unbranched end, inserted into the inferior vena cava, there are three inflatable sealing balloons that overlap the efferent vessels of the liver (hepatic veins). The branched portion has one branch towards the bloodstream in the inferior vena cava, and the other to shunt the efferent blood flow when the portal system is overfilled. To fill the cuffs, there are air ducts in the form of thin tubes that extend inside the catheter and extend outside.

However, this catheter does not completely shut off the liver from the body’s circulatory system and

It does not provide simultaneous, isolated extracorporal blood circulation during liver resection, which reduces the functional effectiveness of the device.

The aim of the invention is to ensure the complete shutdown of the liver from the blood circulation system of the body and at the same time provide isolated extracorporeal blood circulation at the time of liver resection.

The goal is achieved by the fact that a tube of smaller diameter is located in one of the ends of the tube in the pre-inserted catheter, with one end extending from the end of the tube of larger diameter rf an inflatable balloon is attached to it, and the other end is brought out through the side wall of the tube of larger diameter In the second end of the tube of larger diameter, there is a second tube of smaller diameter, the ends of this tube are led out through the side wall of the tube of larger diameter, with one end having an outlet between the cylinders.

In the drawing is a schematic image, the described catheter is female. The catheter is an elastically tubing with inflatable sealing cylinders 1, 2 and 3 and openings 4, 5 and b in the walls. Moreover, cylinders 1,2 and 3 are supplied with air through ducts 7. At the end 8 of the elastic tube there is a tube 9 of smaller diameter, one end of which comes out of the end of tube 10 of greater diameter and an inflatable balloon 3 is attached to it 9 is brought out through the opening J6 “ioKOBO of the wall of the tube 10 of the larger Dig11Mv1ra. At the second end of the 11th elastic tube, the tube is 12 meters in diameter. One end of the tube 12 is brought out through the hole 4 of the side steak tube 13 of the larger one, and the second tube is brought out through the hole 5 in the side wall. In addition, the opening 4 of the side wall T | jy6kH 13 is located between the cylinders 1 and 2. The device operates as follows. o6paiSoM. :::.:,. :. /. . Through the incision in the inferior vena cava 14 Kdniec 11 of the elastic tube of the catheter is inserted so that the inflatable bottom from nSchayba.llon 1 is located above the furnace veins 15 and the other inflatable balloon 2 is lower than them in the hollow, vein opposite the curvature. The end 8 of the elastic tube of the catheter is inserted through the incision i, the liver affinity vessel 17. The duct 7 is fed with the infill is inflatable sealing cylinders 1, 2 and 3. The tube 12 joins the JBXO house 1B of the artificial blood circulation, and the tube 9 with its exit . The tube 10 is connected with the tube 13. The flow of the yo inferior vena cava enters the opening 16 and exits through the opening 19, without confusion with the blood flowing from the hepatic veins 15, which through the opening 4 of the tube 12 enters the device 18, and from it, through tube 9 into the afferent vessel 17 of the liver, do not mix with the afferent blood flow through the tube (TH) enters the end 11 of the elastic catheter tube and further into the vein 14 through the opening 19. Thus. Local blood circulation of the liver is performed on a closed system without mixing with a common jfpoBOTOKoM contour y: hepatic vein 15, tube 12, apparatus 18, into tube 9, into the system of the blood vessels of the liver and again the hepatic veins 15. The use of the proposed catheter allows, firstly, to carry out regional chemotherapy with a high concentration of drugs with the help of an artificial blood circulation without the danger of perfusion in the general circulatory system; secondly, to increase the duration of regional liver perfusion due to the absence of impaired blood flow through the Inferior Vena cava; m of possible complications from bleeding through the hepatic vony; fourth, virtually eliminates the complications of hypoxia associated with impaired hepatic blood flow. Application; catheter Allows the preparation of the liver for an imitated perfusion in the body conditions for 10-15 minutes. Formula of the invention. - A catheter containing an elastic tube with inflatable sealing cylinders; and holes in the walls, air ducts for compaction: to 1 cylinders, about 1 to 2 tons, and so that, in order to completely shut off the liver from the circulatory system, the body is simultaneously, providing a separate, extracorporeal circulation during the liver resection , at one end of the tube there is a tube of smaller diameter, one of which ends out of the end of T of the larger diameter cabin and an inflatable balloon is attached to it, and the other end is brought out through the side wall of the tube of larger diameter; shego diameter arranged: a second tube of smaller diameter ends of the tube 6oKOBSTO withdrawn outwardly through the wall of the larger diameter tube, one end has an outlet between the balloons. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 467743, cl. A 61 M 25/00, 1973.