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. For the next 24 hours, notify the nurse when the bladder is full, and the nurse will collect catheterized specimens: This instruction is incorrect for a 24-hour urine collection. Catheterized specimens are not typically used for creatinine clearance tests, and the nurse should not be notified when the bladder is full. B. Urinate immediately into a urinal, and the lab will collect the specimen every 6 hours for the next 24 hours: This instruction is incorrect for a 24-hour urine collection. Creatinine clearance tests require collection of all urine produced over a 24-hour period, not just specimens at specific intervals. C. Urinate at a specified time, discard this urine, and collect all subsequent urine during the next 24 hours: This is the correct instruction for a 24-hour urine collection. The client should begin by discarding the first voided urine and then collect all subsequent urine produced over the next 24 hours, including the urine from the specified time. D. Cleanse around the meatus, discard the first portion of voiding, and collect the rest in a sterile bottle: This instruction is not appropriate for a 24-hour urine collection. It describes a procedure for collecting a clean-catch urine sample, which is different from a 24-hour urine collection for creatinine clearance.