GLUCOSE

GLU

1.0 mL plasma collected in a PST (LiHeparin tube)

0.5 mL

Plasma-EDTA (Lavender);
Plasma-NaF KOxl (Gray);
Serum-SST, Red Top or Tiger Top
Sterile container - Body fluids and CSF

Room Temperature:
Plasma \Serum 8 hours at 15-25°C
Fluoride Plasma 3 days at 15-25°C

Refrigerated:
Plasma \Serum 3 days at 2-8°C
CSF should be analyzed immediately or stored at 4°C or -20 °C

Frozen: Not specified

Grossly Hemolyzed, Lipemic and Icteric are unacceptable

Plasm/Serum:
45 - 108 mg/dL    0 days to 30 days old
70 - 108 mg/dL   Adult

1 hour prenatal screen < 135mg/dL

CSF
40 – 70mg/dL

Body fluids: No established reference range

Critical Values
Plasma/Serum: 
      < 40 mg/dL or >130 mg/dL             0 days to 30 days old
      < 50 or >500 mg/dL                        Adult

Glucose is the major carbohydrate present in the peripheral blood. Oxidation of glucose is the major source of cellular energy in the body. Glucose derived from dietary sources is converted to glycogen for storage in the liver or to fatty acids for storage in adipose tissue. The concentration of glucose in blood is controlled within narrow limits by many hormones, the most important of which are produced by the pancreas. The most frequent cause of hyperglycemia is diabetes mellitus resulting from a deficiency in insulin secretion or action. A number of secondary factors also contribute to elevated blood glucose levels. These include pancreatitis, thyroid dysfunction, renal failure and liver disease. Hypoglycemia is less frequently observed. A variety of conditions may cause low blood glucose levels such as insulinoma, hypopituitarism or insulin induced hypoglycemia. Glucose measurement in urine is used as a diabetes screening procedure and to aid in the evaluation of glycosuria, to detect renal tubular defects, and in the management of diabetes mellitus. Glucose measurement in cerebrospinal fluid is used for evaluation of meningitis, neoplastic involvement of meninges and other neurological disorders.