This invention identifies cavitation as a damaging problem in catheterizing, such cavitation occurring upon removal of the catheter from the urethra. This invention shows venting the catheter tip to reduce cavitation related damage to the urinary track upon catheter removal. This invention discloses methods to reduce or prevent cavitation damage to portions of the urinary track This invention shows a vent to reduce partial vacuum formation leading to cavitation damage can be plastic “trimmer lines” used in lawn trimmers also called “weed eaters”.
