[Urethral catheters].

After a historical summary on the development of urethral catheters, this article analyzes various aspects about catheters. These aspects include: types of catheters and their recommended use, their counterindications, their classification, how to select the appropriate catheter, the information which a patient should be provided regarding the use of a catheter, the techniques and equipment necessary for their use, the most common problems encountered and how to solve them,...