Abstract: A multilumen vascular catheter (1) having a flexible catheter tube (16) with a distal end-portion (12) which is terminated by a guide-wire opening (26). The catheter tube (16) has a first lumen (18) for extraction of fluid from the vessel (1) and a second lumen (20) for introducing fluid to the blood vessel (14). One or more suction openings (22) communicate with the first lumen (18) and are located upstream of one or more outlet openings (24), which in turn communicate with the second lumen (20). The distal end-portion (12) is permanently bulbous and has a first, widening section (A) starting distally from the catheter tube (16) with a gradually increasing external cross-section to a shoulder (30) with a maximum external diameter into a second, narrowing section (B) having a gradually decreasing external cross-section distally.

Abstract: A multilumen vascular catheter (1) for treatment of patients by insertion of the vascular catheter in a venous blood vessel (14) by means of a guide-wire (28), the vascular catheter having a proximal connection point (10), a distal end-portion (12) which is terminated within a guide-wire opening (26), and a flexible catheter tube (16) arranged between the proximal connection portion (10) and the distal end-portion (12). The catheter tube (16) has a first lumen (18) for extraction of fluid such as untreated blood from the vessel (1) and a second lumen (20) for introducing fluid such as treated blood to the blood vessel (14). One or more suction openings (22) communicate with the first lumen (18) and are located upstream of one or more outlet openings (24), which in turn communicate with the second lumen (20), the suction openings (22) and the outlet openings (24) being located at the distal end-portion (12).