b. Number 14 Fr. and 16 Fr. are used for female adults.
c. Number 20 Fr. and 22 Fr. are usually used for male adults.
TYPES OF URINARY CATHETERS
The catheters most commonly used are made of plastic. 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.