Glucose Fasting GTT

GLUCF is test code for SV.

GLUCF / GLUC F - NOCO

Glucose Fasting Serum

1.0 ml plasma from Green top (Lithium Heparin)

0.5 mL
Note: For neonate requirements see Neonate Minimum Blood Volumes

1.0 mL serum from Serum Gel or Red Top

Specimen Type	Temperature	Time
Plasma Li Hep	Refrigerated	72 hours
Serum SST	Refrigerated	72 hours
Red Top – Separated*	Refrigerated	72 hours

 
*Centrifuge and aliquot into a plastic vial.

Gross hemolysis
For NCMC only: Gross lipemia if plasma - Serum specimen needed if Grossly Lipemic

Monday through Sunday; Continuously

Same day

SV & OCH
            0-31 days: 50-80 mg/dL
            >31days: 60-99 mg/dL
            Critical value (automatic call-back): <50 mg/dL or >500 mg/dL
NCMC, MMC, BFCMC, SRMC & EMCH
            0-31 days: 50 – 80 mg/dL
            1 month – 10 years: 60 – 99 mg/dL
            10-150 years: 70 – 99 mg/dL
            Critical value (automatic call-back): <50 mg/dL or >500 mg/dL

Glucose is major carbohydrate present in peripheral blood. Oxidation of glucose is major source of cellular energy in body. Glucose derived from dietary sources is converted to glycogen for storage in liver or to fatty acids for storage in adipose tissue. Concentration of glucose in blood is controlled within narrow limits by many hormones, most important of which are produced by pancreas. Most frequent cause of hyperglycemia is diabetes mellitus resulting from a deficiency in insulin secretion or action. 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 cerebrospinal fluid is used for evaluation of meningitis, neoplastic involvement of meninges and other neurological disorders