| 摘要 |
The present invention is directed towards a method and device for cutting, dilating, tamponading a coronary vessel and with perfusion capabilities. The device consists of instrument general catheter having a distally position cylindrical member surrounded by a dilating balloon. The catheter is designed to be used with a guide wire for positioning the instrument and an advancement catheter permit the proper localization of the instrument inside a coronary artery. There are openings in a proximal cast member to permit the perfusion of blood which passes through the body of the instrument. In the method of using the incising/dilating/tamponading/perfusing device, the first stage requires the employment of a guide wire that is passed through the area of stenosis in the coronary artery. The instrument is threaded over the guide wire to the stenosis and the distal protuberance performs initial dilation of the stenosis by apply proximal pressure to the advancement catheter. The cutting member is then positioned outside the distal end of the instrument. As the instrument is advanced, the cutting member progressively transects the stenosis and the artery while the rounded distal member progressively dilates the stenosis. With the artery completely incised longitudinally, the adventitia is transected, and the instrument is advanced over the length of the transection. The dilating balloon is distended to further dilate the now pliable artery and to tamponade the site of incision. It remains in this position while distal circulation is supplied by blood passing through the body of the instrument by entering and exiting the openings in the proximal and distal cast parts. Injections of contrast material and slow decompression of the dilating/tamponading balloon indicate when a firm clot has been established.
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