Abstract: An especially designed double lumen catheter (10) for use in a device for in-vivo purification of blood, by means of which blood pumped out of a vein is subjected to intensive ultrafiltration and the retentate, together with a quantity of a substitute fluid roughly corresponding, volumetrically, to the filtrate, is returned to the vein.The double lumen catheter (10) with a coaxial arrangement of the two catheter tubes (13, 14) is so designed that the outer tube (14) is shorter than the inner tube (13) which latter forms the open catheter tip (12). The inner tube (13) is 4-6 cm longer than the outer tube (14) and, beginning from the tip (12), it has 4 pairs of lateral openings (11) at mutual spacings of between 8 and 12 mm. The outer tube (14) at its end has, over a length of 3.

Abstract: An especially designed double lumen catheter (10) for use in a device for in-vivo purification of blood, by means of which blood pumped out of a vein is subjected to intensive ultrafiltration and the retentate, together with a quantity of a substitute fluid roughly coresponding, volumetrically, to the filtrate, is returned to the vein.The double lumen catheter (10) with a coaxial arrangement of the two catheter tubes (13,14) is so designed that the outer tube (14) is shorter than the inner tube (13) which latter forms the open catheter tip (12). The inner tube (13) is 4-6 cm longer than the outer tube (14) and, beginning from the tip (12), it has 4 pairs of lateral openings (11) at mutual spacings of between 8 and 12 mm. The outer tube (14) at its end has, over a length of 3.

Abstract: Device for in-vivo purification of the blood, with which blood pumped from a vein is subjected to intensive ultrafiltration and the filtrate, together with a quantity of the substitution fluid volumetrically corresponding to the filtrate, is returned to the vein, which device combines a double lumen catheter, an inserted, initial tube pump, and an ultrafiltration filter, with connecting tubes between catheter and pump. A feed line, with an inserted, second pump for the substitute fluid, opens into the return line from the hemofilter to the catheter, and a feed line for anticoagulants opens into the feed line to the first tube pump; the ultrafilatration filter is also connected through a precisely adjustable valve to a measuring container in which the fluid drawn out of the system is collected.

Abstract: A perfusion catheter, designed as a double catheter which includes a splint catheter (1) and a mounted second catheter tube (3), which is shorter than the splint catheter (1) and which branches off from splint catheter (1). The splint catheter includes an attached shunt tube (2) and at least one lateral opening (4). A solid rod (7) is inserted into the splint catheter (1) from its back end so as to temporarily close the lateral opening(s) (4) and the shunt (2). The catheter is particularly useful for the isolated perfusion of the liver.