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Catheter insertion is performed by placing the catheter into the urethra and allowing urine to drain from the bladder freely and may be attached to an external urine collection bag to store the urine. There are primarily three types of catheters: â¢ Indwelling or foley catheters. â¢ Intermittent catheters. â¢ External catheters. Indwelling or foley catheters are flexible tubes placed into the bladder to drain urine. Patients who require long-term catheterization use them.
Each type of catheter (figure 3-1) has a rounded tip to prevent injury to the meatus or the urethra. The Foley catheter is frequently used. It is usually inserted by the nurse. The Malecot four-wing catheter and the dePezzer mushroom catheter are inserted by the urologist using a stylet. The stylet is removed after the catheter has been inserted. Because they are very difficult to sterilize, catheters should be considered disposable and discarded after they have been removed. Figure 3-1. Urinary catheters. a. Intermittent Catheter. An intermittent catheter is used to drain the bladder for short periods (5-10 minutes). It may be inserted by the patient. b. Retention/Indwelling Catheter. This type of catheter is placed into the bladder and secured there for a period of time. It is used following surgery, bladder injury, or in bladder infections. It may also be used for an incontinent or nonresponsive patient. (1) It provides continuous temporary or permanent drainage of urine.