What is the recommended procedure for collecting a 24-hour urine sample?

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Multiple Choice

What is the recommended procedure for collecting a 24-hour urine sample?

The key idea is to define a single 24-hour window for urine collection and capture all urine produced within that window. Begin by emptying the bladder and discarding that first morning urine to mark the start time. Then collect every urine sample for the next 24 hours, including the urine produced on waking the next morning. This method ensures you account for every drop in the full 24-hour period, preventing under- or over-collection. If you included the first morning urine as part of the 24-hour collection or started timing at a different point, you’d shift the window and risk missing part of the excretion or double-counting another portion, leading to inaccurate results.

The key idea is to define a single 24-hour window for urine collection and capture all urine produced within that window. Begin by emptying the bladder and discarding that first morning urine to mark the start time. Then collect every urine sample for the next 24 hours, including the urine produced on waking the next morning. This method ensures you account for every drop in the full 24-hour period, preventing under- or over-collection.

If you included the first morning urine as part of the 24-hour collection or started timing at a different point, you’d shift the window and risk missing part of the excretion or double-counting another portion, leading to inaccurate results.

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