| 摘要 |
The invention refers to a device which aims at a simplified, regarding the existing, method for the intravascular implantation of a bifurcated implant inside the aortic bifurcation (26). The proposed method consists of a three-cylinder and two distal branches (4,5) all of which have a proximal (14,9,8) nozzle and a distal (12,10,11) nozzle, each. The cylinders consist of a cylindrical metal-made self distending framework of stainless steel or ninito, externally covered by a cylinder (3,6) made of thin PTFE, nylon or any other flexible biocompatible plastic which, at the distal nozzle (12) of the primary cylinder retroflects inwards. The said cylinders may be compressed and put inside catheters (23,37,38) of small diameter with the help of which they are introduced inside the vasal canal. After they are promoted to the desirable position they may distend, regaining their initial diameter. The primary cylinder (1) is introduced inside the aorta and its proximal nozzle (14) comes in circular contact with the helthy part (13) of the aorta, found proximally in relation to the aneurysm. The distal nozzle of the primary cylinder is laid over the distened aortic bifurcation (26). The two brances both have proximal nozzles (8,9) of a diameter equal or by 5mm lesser than that of the distal nozzle (12) of the primary cylinder. The bifurcation of the primary cylinder is achieved with the insertion of the proximal ends of the two brances inside its distal end in which they are levelled and medially compressed by each other. The pressure applied on each of the two brances by each other is even and equal to the pressure applied by their external surface on the internal surface of the primary cylinder (drawing 5). Together the distal nozzles of the branches occupy the entire perimeter of the primary cylinder (43). Alternatively tubes of different diameters and different chassis types may be used as branches (distal cylinders) (28,27). |
