THE ACCURATE collection of a 24-hour urine sample is an essential part of many diagnostic protocols and clinical research studies. In young infants, such collections present, at the very least, a difficult nursing problem, since constant supervision is necessary in order to ensure complete collections. Inaccurate specimens of 24-hour urines could lead to spurious test results with possible serious consequences for the patient.
Most present methods utilize some form of collecting apparatus which must be tightly applied to the perineum. These range from the "bird feeder" types to variants of a colostomy bag. Skin ulceration, urinary leakage, and fecal contamination are the most frequently encountered problems with these apparatuses. A hammock assembly designed by Hepner and Lubchenco1 has proved useful for separate urine and stool collections in newborn infants. This report presents an adaptation of the hammock principle to a large but mobile metabolic crib, capable of providing prolonged