Final answer:
When obtaining a 24-hour urine collection from a patient who uses a bedside commode, the PCT should save all urine, including the initial void, in the collection container.
Step-by-step explanation:
When obtaining a 24-hour urine collection from a patient who uses a bedside commode, the PCT (Patient Care Technician) should save all urine, including the initial void, in the collection container (Option B). This is because a 24-hour urine collection requires collecting all urine produced by the patient over a specific time period. Discarding urine in the toilet after each void (Option A) or collecting only the urine from the last 12 hours (Option C) would not provide an accurate measurement of the total daily urinary volume and the various substances being measured in the urine. Placing the collection container in the refrigerator between voids (Option D) is not necessary unless specifically instructed by a healthcare professional.