Merck Manual

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Obtaining a Clean-Catch Urine Sample

Obtaining a Clean-Catch Urine Sample

  • The head of a man’s penis or opening of a woman’s urethra is cleansed, usually with a small pad that contains an antiseptic substance. Uncircumcised men should retract their foreskin to cleanse the head of the penis.

  • The first few drops of urine are allowed to flow into the toilet, washing out the urethra.

  • Urination is resumed, and a sample is collected from the stream into a sterile cup. Usually the sample is obtained before the stream ends (midstream).