urethral catheter, urine collection arrangement, connector for connecting urethral catheters, bladder catheter, system for inducing negative pressure in a portion of a patient's urinary tract, method for extracting urine from a patient's ureter or kidney, method for inhibiting renal damage by applying negative pressure, method for treating acute renal damage due to venous congestion, method for treating nyha class iii or heart failure class iv, method for treating nyha class ii, class iii, or heart failure class iv, method for treating stage 4 or stage 5 of chronic reindeer disease and method for treating stage 3, stage 4 or stage 5 of chronic kidney disease

摘要

the urethral catheters and arrangements provided include: a drainage lumen including a proximal portion configured to be positioned in at least a portion of a patient's urethra and a distal portion configured to be positioned in a patient ureter and / or kidney, the portion including a coiled retaining portion including at least a first spring having a first diameter and a second spring having a second diameter, or wherein the retaining portion extends radially outwardly from the distal end portion of the drainage lumen portion, the retention portion including a proximal end having a first diameter, a distal end having a second diameter, and a wall and / or surface extending therebetween, the retention portion having a second diameter greater than the first diameter when implanted; or wherein the retaining portion includes a plurality of drainage pipes.