CATHETER

摘要

A catheter has an entrance opening defined by the first end of a catheter body and non-smooth inner surface. The entrance opening intersects a longitudinal axis extending longitudinally through the center of a lumen adapted to drain urine from a bladder. The non-smooth inner surface can have dimples, channels, or grooves, all of which decrease frictional fluid forces against the inner surface as the urine drains. The catheter is free of any eyelets formed in the side wall of the catheter body. The catheter is further free from any hemispheric tip located at one end.

主权项

1. A urinary catheter comprising:
a generally cannular sidewall with first and second ends that therebetween define a longitudinal axis, said first end adapted to be inserted into a patient's urethral canal; said sidewall having an outer surface spaced apart from an inner surface; a lumen defined by the inner surface adapted to drain the fluid from the patient's bladder; and an entrance opening defined in the first end of the sidewall, and wherein a plane of the opening intersects the longitudinal axis.