Collection and Preservation of 24-Hour Urine Specimens
Patient:
The 24-hour collection container may contain chemicals (as a preservative)
that are hazardous.
DO NOT urinate directly into the container.
Collect urine in a clean, dry vessel and carefully pour the urine into the
24-hour collection container.
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Follow your physician’s advice regarding any food, drink or
drugs before and during collection.
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Empty your bladder completely upon awakening and discard this urine.
This is your start date and time. Write it on your paperwork
and/or the collection container.
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Collect all urine for the next 24 hours. The last urine
collected should be that voided upon awakening the second day, at the
same time as the start time.
- Recap the collection container carefully and completely.
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Return the collection container to where you were instructed to return
it as soon as possible.
NOTE: Some urine tests require that the 24-hour urine collection be
refrigerated during collection. Follow your physician’s
instructions for all collection procedures.
Provider/Nurse:
If it is necessary to measure the total amount of soluble substances
excreted in a 24-hour period, a strictly timed 24-hour specimen is
required, because many soluble substances exhibit diurnal variations.
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Collect the specimen in one or more disposable, wide-mouthed, clean
plastic container(s) with a plastic lid large enough to hold about 3
L. Amber-colored containers may be required for light-sensitive
analytes.
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Determine if the collection will require a preservative, ensuring the
collection container has the appropriate preservative, at the correct
concentration, along with a warning label indicating the preservative
in use.
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Label the collection container including the patient identification
(name and hospital number), test(s) required, and preservative
used.
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The start date and time plus the finish date and time should be
recorded on the container and requisition at the beginning and end of
the collection period.
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The 24-hour collection should begin by having the patient empty his or
her bladder or catheter bag at a fixed time and discard the
specimen. Record this start date and time on the collection
container and on the laboratory requisition.
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If a preservative is required, the patient must be advised to collect
the urine in a separate clean container and then carefully transfer
the urine to the collection container that will be transported to the
laboratory. Comment: Assume that all preservatives are
hazardous (most are).
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Instruct the patient (or nurse) to collect all voided urine during the
24-hour collection period and add it to the collection container.
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The collection should end exactly 24 hours after it began, by having
the patient empty his or her bladder, or catheter bag, and adding this
specimen to the collection container.
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Record the ending date and time on the collection container and on the
laboratory requisition.
- Carefully seal the cap tightly so as to avoid leakage.
Consult the following on-line resources:
Department of Nursing Services and Patient Care policies:
Pathology Laboratory Services Handbook: