초록

The slit in the cap has a length that is greater than or equal to the inside diameter of the body of the catheter. The said slit preferably extends also into the side of the cap, and a tube is inserted into the distal portion of the catheter in order to support the sleeve during aspiration.

대표청구항 ▼

[ What is claimed is:] [1.] A catheter for controlling the circulation of fluid therethrough, from or to a duct of a human or animal body in which the catheter is inserted, the catheter comprising:a tubular body having a principal axis and having an outside diameter, an internal passage of an inside

[ What is claimed is:] [1.] A catheter for controlling the circulation of fluid therethrough, from or to a duct of a human or animal body in which the catheter is inserted, the catheter comprising:a tubular body having a principal axis and having an outside diameter, an internal passage of an inside diameter, and a distal end having an opening that communicates with the passage;a cap that is affixed to the distal end of the body of the catheter, the cap having an essentially flat distal wall facing the open distal end of the body; anda slit forming a valve through the flat distal wall of the cap, to communicate with the passage in the body of the catheter, the valve reacting to pressure differences on either side thereof, for the circulation of the fluid from or to the duct, the slit having a length that is greater than or equal to the inside diameter of the body of the catheter;wherein the flat distal wall of the cap is spaced from the distal end of the catheter body by a predetermined distance and wherein a cavity is formed between the flat distal wall of the cap and the distal end of the catheter body, said catheter further comprising an internal strengthening tube disposed coaxially within the internal passage of the catheter body and extending beyond the distal end thereof and into the cavity.