SU1482714A2 - Device for setting prosthesis into blood vessel - Google Patents

Abstract

This invention relates to a medical technique used in vascular surgery for installing a self-locking prosthesis into a blood vessel. To prevent the denture from bending and thereby increasing the efficiency of the endoprosthesis, the device is additionally equipped with an elastic sleeve 11 placed on an elastic rod with the possibility of free longitudinal movement. Through the lumen of the sleeve 11, a catheter 15 is inserted into the prosthesis with a balloon 16, which is connected to a source 17 of fluid pressure. The elastic sleeve 11 is permanently removed from the vessel and, expanding the balloon 16, dilates the prosthesis along its entire length and eliminates the bends of the prosthesis. 3 il.

Description

1 (61) 1318235

(21) 4134580 / 28-14

(22) 10/15/86

(46) 05/30/89. Bul Number 20

(71) Kharkiv Scientific Research Institute of General and Emergency Surgery, Production Association Kharkiv Serp and Molot Motor-Building Plant and Physical-Technical Institute of Low Temperatures

AN USSR

(72) N.L. Bolodos, V.E.Shekhanin, I.P.Karpovich, V.I.Tro, NF.L.Yakovenko, V.I.Kuleba, L.S. Keremet

and A.S. Neoneta

(53) 615.472 (088.8)

(56) USSR author's certificate

No. 1318235, cl. A 61 M 29/00, 1984.

(54) DEVICE FOR INSTALLING A PROSTHETIS IN THE BLOOD VESSEL (57) The invention relates to a medical technique used in vascular surgery for installing a self-fixing prosthesis into a blood vessel. To prevent the denture from bending and thereby increasing the efficiency of the endoprosthesis, the device is additionally equipped with an elastic sleeve 11 placed on an elastic rod with the possibility of free longitudinal movement. Through the lumen of the sleeve 11, a catheter 15 is inserted into the prosthesis with a balloon 16, which is connected to a source 17 of fluid pressure. The elastic sleeve 11, expanding the balloon 16, is permanently removed from the vessel, the dilation of the prosthesis along its entire length is performed and the prosthesis is bent. 3 il.

(I

one

The invention relates to a medical technique used in vascular surgery, in particular to devices for installing a self-fixing prosthesis in a blood vessel, aimed at improving the known device according to the author. St. No. 1318235.

The aim of the invention is to increase the effectiveness of endoprosthesis by preventing the prosthesis from bending.

FIG. 1 shows a device for placing a prosthesis into a blood vessel, general view; in fig. 2 - part of the flexible tubular guide in

assembled with a conductor and an elastic tube; in fig. 3 - the prosthetic vessel at the moment of removing the elastic sleeve and the catheter with the balloon from it. The device comprises a flexible tubular detachable guide, made of two parts 1 and 2 with flanges 3,4, a pusher 5 for moving the prosthesis, a clutch 6 connecting the detachable parts 1.2 of the guide.

The prosthesis is made in the form of a porous cylindrical frame 7 and a fixing element 8 connected to it, made in the form of a flat spring of a zigzag shape, rolled up to 00 ГС

one

go

31

the one in the ring. The prosthesis and the pusher 5 are placed in the filling part 2 of the tubular guide. In the same part of the guide, between the spring 8 and the pusher 5, there is an elastic rod 9 with a wire coil 10 wound on it. Resilient sleeve 11 is installed coaxially with the elastic rod 9 with the spiral 10. Part 1 of the guide (transport) has the ability to move freely along a flexible conductor 12 with a soft tip 13 and placed on it also with the possibility of relative movement of the intermediate elastic tube 14.

A catheter 15 with a balloon 16 connected to the source 17 of the fluid pressure is also used to set up the prosthesis.

The device is used as follows.

In a patient with an established diagnosis (for example, stenosing atherosclerosis of the iliac artery), the femoral artery is isolated, which is taken for turnstiles and longitudinal arteriotomy is performed. Then the dilatation of the iliac artery is performed, and guide wire 12 is inserted into the resulting lumen to the site of the prosthesis in the iliac artery.

When moving inside the vessel, the conductor contacts with the soft tip 13 with the vessel walls and bends in accordance with the natural curvature of the vessel. Then, along the conductor, the intermediate elastic tube 14 is moved to the vessel. Thereafter, the transport part 1 of the tubular guide is put on the cantilever part of the tube 14 protruding over the wound and is moved along the tube to the vessel. Moving this part of the guide in the vessel takes place along the path defined by the conductor, which prevents injury to the vessel.

After the transport part of the tubular guide is inserted into the necessary segment of the vessel, it is held in this position beyond the cantilever portion protruding over the wound, and the conductor 12 and the intermediate tube 14 are removed from its cavity. Then the guide part is connected to the transport part by means of

50

5 о с

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the eternal part 2 of the guide. By means of the pusher 5, the prosthesis is moved together with the elastic rod 9 and the elastic sleeve 11 from the filling part 2 of the guide into its transport part 1 and further to its upper end. Holding the pusher 5 movably, the tubular guide is assembled out of the vessel. In this case, the prosthesis leaves the transport part 1 of the guide, under the action of the elastic forces of the spring 8, it is released and the framework 7 comes into contact with the walls of the vessel.

After placing the prosthesis in the vessel, holding the elastic sleeve 11, the pusher 5 and the elastic rod 9 are withdrawn from the vessel. Through the lumen of the elastic sleeve, the catheter 15c is inserted into the prosthesis with a balloon 16 so that its balloon 16 is located at the level of the spring 8 in the vessel . Periodically, the internal cavity of the balloon 16 of the catheter 15 is connected to the source 17 of the fluid pressure, and the elastic sleeve and the catheter are gradually removed from the vessel and the dilatation of the prosthesis is made: first of its spring and then of the skeleton along its entire length to its original diameter. In this case, the bends of the prosthesis are eliminated and its frame is in close contact with the walls of the vessel.

After the elastic bushing and catheter are completely withdrawn from the vessel, the lower end of the prosthetic framework is stitched to the femoral artery below the site of arteriotomy.

When using the proposed device, both bends and twists of the prostheses and prosthetic thrombosis in the postoperative period are prevented.

Claims (1)

Invention Formula Device for installing a prosthesis in a blood vessel according to ed. St. No. 1318235, characterized in that, in order to increase the efficiency of the endoprosthesis by preventing the prosthesis from bending, it is additionally equipped with an elastic sleeve placed on the elastic rod with the possibility of free longitudinal movement. 73 AND u 1 0ue.Z Compiled by N. Solov'eva A. Makovska Editor Tahred L. Oliynyk Proofreader M. Maksimnshinets Order 2733/9 Circulation 526 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Ftse.Z Subscription