Post-Void Residual


A catheter is a small, hollow, flexible tube that is gently inserted into the bladder to drain any remaining (residual) urine after you have emptied (voided) your bladder. A catheterized urine sample is obtained to send a sterile (uncontaminated) sample to the lab for examination and to check for infection. Some patients after surgery will have an “indwelling catheter”, which is a catheter that remains in the bladder for a few weeks while they are recovering from surgery. Some patients desire to be taught to catheterize themselves after surgery rather than have an indwelling catheter.

The test takes about 10 minutes. The teaching visit takes 20-30 minutes.


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