Urinary Glucose

Test interactions Positive Coombs (direct) test, false-positive urinary and/or serum proteins, false-positive or false-negative urinary glucose using Clinitest Positive Coombs (direct) test, false-positive urinary and/or serum proteins... 

Drug/Lab test interactlons Su tor am 6es may produce false-positive urinary glucose tests when performed by Benedict s method. Sulfisoxazole may interfere with the Urobilistix test and may produce false-positive results with sulfosalicylic acid tests for urinary protein. 

A urine dipstick indicates a urinary glucose of >25 mmol/L but is negative for nitrites and leucocyte esterase. 

Drugs can cause false results in clinical chemistry tests, e.g. plasma cortisol, urinary catecholamine, urinary glucose. 

The presence of high concentrations of ascorbic acid in the urine can interfere with tests for urinary glucose. With concentrations as low as 200 pg/ml, tests performed with glucose oxidase paper can be inhibited, giving a false negative result (46). 

Mayson JS, Schumaker O, Nakamura RM. False negative tests for urinary glucose in the presence of ascorbic acid. Am J Clin Pathol 1972 58(3) 297-9. 

Treatment with levodopa results in false-positive tests for urinary glucose (66). 

James RC, Chase GR. Evaluation of some commonly used semiquantitative methods for urinary glucose and ketone determinations. Diabetes 1974 23 474-9. 

This patient s elevated urinary glucose and his dehydration episode are caused by a deficiency in which of the following ... 

Plasma, Serum or Blood Glucose, and Urinary Glucose... 

Interferences with Urinary Glucose and Enzymes—Endogenous Inhibitors... 

Berg, B. 1986. Ascorbate interference in the estimation of urinary glucose by test strips. Journal of Clinical Chemistry and Clinical Biochemistry 24 89-96. 

Figure 4. Overall mean SEM) daily urinary glucose loss in 18 diabetics (22 studies) over 5 d without (control) and with 14-26 g guar per day added to meta-bolically controlled diets.

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