The 5-hydroxyindoleacetic acid level in a 24-hour urine specimen and the chromogranin A level in blood were reportedly normal, as were the results of pulmonary function testing and colonoscopy.

Your doctor will request a random sample or a 24-hour sample. A random urine sample requires overnight fasting (except water). You collect your second urination of the day, disposing of the first.

They said that physicians currently ask patients to run 24-hour urine collections, and that fluid is then examined for specific substances — like uric acid — to make inferences on dietary intake.

Typically, a doctor will request a 24-hour urine sample as a follow-up test if the single sample shows a large amount of protein in the urine.

The 24-hour urine sample test is also commonly used to take an accurate measurement of the protein content in the urine over a 24-hour period.

Some studies have shown the urine protein: reatinine ratio to be a better predictor of progression to renal failure than the 24-hour urine specimen. — Julee B. Waldrop, DNP (176-4) ...

Plasma porphyrins were grossly elevated, and a 24-hour urine specimen collected in a dark container also showed remarkably elevated porphyrin levels. Some were several thousand times the normal ...

Estimating dietary phosphorus intake from a single 24-hour urine sample resulted in underestimation up to 98% in some patients and overestimation up to 79% in others.

A 24-hour urine specimen contained 5.33 g of protein, 80.3% of which was albumin by UPEP. Serum protein electrophoresis did not reveal an M-protein. Serum and urine IFE detected λ Bence Jones ...

24-Hour Urine Results The 24-hour urine volume was 1100 mL. Normal volume is >20 mL/kg body weight , so this volume is slightly below normal for a young woman of Molly's weight. [1] The analysis was: ...

The 24-hour urine sample contained 14.8 gm. of protein, 656 mg. of siderophilin and 120 microgm. of iron. Thus, siderophilin comprised 4.4 per cent of the total protein contained in this urine sample.