The nurse plans to collect a 24 hour urine specimen for a creatinine clearance test. Which instruction should the nurse provide to the adult male client?

A. Urinate at a specified time, discard this urine, and collect all subsequent urine during the next 24 hours: Discarding the first void ensures the collection begins with an empty bladder, and all urine afterward is included for accurate measurement. B. Urinate immediately into a urinal, and the lab will collect the specimen every 6 hours, for the next 24 hours: This describes timed urine sampling, not a continuous 24-hour collection required for creatinine clearance. C. For the next 24 hours, notify nurse when the bladder is full, and the nurse will collect catheterized specimens: Routine creatinine clearance testing does not require catheterization unless the client is already catheterized. D. Cleanse around the meatus, discard first portion of voiding, and collect the rest in a sterile bottle: This describes a midstream or clean-catch technique, typically used for urine cultures, not 24-hour collections.