For certain studies, it is necessary to collect the entire urine a day. This happens for example in the determination of electrolytes in the analysis of proteinuria (excretion of protein in urine) for the detection of various urinary metabolites.
How it's done.
It is important that the person knows exactly how he must proceed. It will set a date "zero". At this time (preferably in the morning), the bladder and the bowel is emptied. Only then begins the collection period. Every drop of urine, which then escapes, is caught in a vessel. After expiration of the 24 hours from the time "zero", once the bladder is completely emptied and this urine is collected.
The bowel is very important before.
Common mistakes in the 24-h urine arise when this procedure is not adhered to exactly. Also the bowel is very important. The reason is that often involuntary defecation and urine is drained. This is missing in the urine sample and then it is faulty.
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