Catheter

(kath’-e-ter). An instrument for withdrawing water from the bladder; made either of silver, india-rubber, silk elastic, gla or whalebone. When not in use, the instrument should be kept in 1 in 20 carbolic; just before and just after using, it should be sterilised; it is usual to lubricate it with antiseptic oil before pa ing. The method of pa ing can only be learned by practice.