Sorted By Test Name - Mayo Medical Laboratories

UREDF
83255
4986
1 0.35-0.69 Equivocal
2 0.70-3.49 Positive
3 3.50-17.4 Positive
4 17.5-49.9 Strongly positive
5 50.0-99.9 Strongly positive
6 > or =100 Strongly positive Reference values
apply to all ages.
Clinical References: Homburger HA: Allergic diseases. In Clinical Diagnosis and Management by
Laboratory Methods. 21st edition. Edited by RA McPherson, MR Pincus. New York, WB Saunders
Company, 2007, Chapter 53, Part VI, pp 961-971
Reducing Substance, Feces
Clinical Information: Sugars (eg, glucose, galactose, fructose, maltose, lactose, and pentose) are
characterized as reducing substances based on their ability to reduce cupric ions to cuprous ions. Fecal
reducing substances may be increased in carbohydrate malabsorption syndromes.
Useful For: Diagnosing intestinal malabsorption in children Assisting in the differentiation between
osmotic and nonosmotic diarrhea Screening test for: -Diarrhea from disaccharidase deficiencies, (eg,
lactase deficiency) -Monosaccharide malabsorption
Interpretation: Negative: negative Normal: 0.50 g/dL (grade 2-4)
Reference Values:
Negative or trace
Clinical References: Todd S: Archives of disease in childhood: differentiation of osmotic and
secretory diarrhea by stool carbohydrate and osmolar measurements. In Clinical Diagnosis and
Management by Laboratory Methods. Vol 77. 20th edition. Edited by JB Henry, FR Davey, CJ Herman,
et al. Philadelphia, Saunders, 2001, pp 201-205
Renal Biopsy, Electron Microscopy
Clinical Information: Kidney biopsy has proven of value in the clinical evaluation and management
of patients with undiagnosed kidney disease. The clinical setting may include acute renal failure,
nephrotic syndrome, asymptomatic proteinuria and hematuria. Kidney diseases in the setting of a systemic
disease are often diagnosed on kidney biopsy. Biopsy of the transplanted kidney is important in the
determination of the presence of acute rejection, infection, or recurrent disease. Optimal interpretaion of a
kidney biopsy requires integration of clinical and laboratory results with light microscopic,
immunofluorescent histology, and electron microscopy findings. Electron microscopy is required for the
diagosis of Alport syndrome, dense deposit disease, thin glomeular basement membrane nephropathy, and
fibrillary glomerulonephritis; and is helpful in evaluating secondary causes of glomerulonephritis such as
lupus nephritis.
Useful For: Evaluation of patients with undiagnosed kidney disease Following the course of therapy or
progression of disease Diagnosing disease with only electron microscopic alterations
Interpretation: A written report is issued along with appropriate annotated electron microscopic
photomicrographs.
Reference Values:
An interpretive report will be provided.
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