Wallach's Interpretation of Diagnostic Tests: Pathways to Arriving at a Clinical Diagnosis (956 page)

   Major trauma

   Stroke

   Myocardial infarction

   Oral steroid therapy

   Burns, infections

   Pheochromocytoma

Decreased In

   Treatment with ascorbic acid, levodopa, or mercurial diuretics

   Limitations

   Prolonged exposure of urine sample to room temperature lower glucose results due to microbial contamination and glycolysis.

   Specific gravity >1.020 and increased pH cause reduced sensitivity and falsely low glucose levels.

GLUCOSE, WHOLE BLOOD, SERUM, PLASMA

   Definition

   A blood glucose test measures the amount of a type of sugar, called glucose. Glucose comes from carbohydrate foods and is the main source of energy used by the body. Glucose levels are regulated by insulin and glucagon.

   
Normal ranges:
see Table 16.38.

TABLE 16–38. Normal Ranges for Glucose