Used to assess total urea excretion in patients receiving parenteral nutrition
24 HOUR URINE COLLECTION PROTOCOLS
The specimen must be collected into a clean, labelled container provided by the laboratory
The patient must be told not to urinate directly in to the bottle if it contains acid, because of the danger of acid burns
If the patient does not urinate directly into the bottle, each micturation must be added to that already collected
Start collection after the patient has emptied the bladder. This time must be recorded on the specimen bottle
The bottle must kept in the refrigerator between collections
All urine passed for the next 24 hours must be collected, including the last of the morning
Complete all details on conatiner label and deliver to the laboratory as soon as possible. If some urine is lost or contaminated during the colelction period, the collection must cease and a new 24 collection commenced
24 hour collection in a plain bottle
Bottle should be refrigerated during collection and be delivered to the laboratory promptly | 
