CATHETER FOR PERCUTANEOUSLY CREATING AN ARTERIOVENOUS FISTULA AND/OR GUIDEWIRE PLACEMENT BY ITSELF IN CONCOMITANT VESSELS

The present disclosure provides a catheter (12) for percutaneously creating an arteriovenous fistula and/or guidewire placement by itself in concomitant vessels, the concomitant vessels being a vein (2) and an artery (4). The catheter comprises: an elongate body (14) dimensioned so as to be insertable into the vein, the elongate body comprising a proximal portion (16) and a distal portion (18), the distal portion having an end portion (20); and a lumen (25) extending through the elongate body for accommodating a guidewire (8). The catheter further comprises: an activatable cutting element (22) having a cutting surface (22a). The distal portion may comprise the activatable cutting element located at or in the vicinity of the end portion, wherein the cutting element is configured to deliver energy to a cutting site to create the fistula, wherein the activatable cutting element is arranged to be initially activated when the cutting element is located in the vein and before at least a portion of the cutting element is located the artery. Alternatively, the activatable cutting element (22) may be configured to be deployable and retractable through the lumen (25), wherein the cutting element is configured to deliver energy to a cutting site to create the fistula, wherein the activatable cutting element is arranged to be initially activated when the cutting element is located in the vein and before at least a portion of the cutting element is located the artery. A device comprising the catheter and a system comprising the device are also disclosed. La présente divulgation concerne un cathéter (12) permettant de créer par voie percutanée une fistule artérioveineuse et/ou de placer automatiquement un fil-guide dans des vaisseaux concomitants, les vaisseaux concomitants étant une veine (2) et une artère (4). Le cathéter comprend : un corps allongé (14) dimensionné de façon à pouvoir être inséré dans la veine, le corps allongé comprenant une partie proximale (16) et une partie distale (18), la partie distale comportant une partie d'extrémité (20) ; et une lumière (25) s'étendant à travers le corps allongé pour recevoir un fil-guide (8). Le cathéter comprend en outre un élément de coupe activable (22) doté d'une surface coupante (22a). La partie distale peut comprendre l'élément de coupe activable situé sur la partie d'extrémité ou à proximité de celle-ci, l'élément de coupe étant conçu pour fournir de l'énergie à un site de coupe pour créer la fistule, l'élément de c