1 Hour Glucose (OB Screen)Print this page
Updated Test Information:
1 Hour Glucose (OB Screen)
GTT, 1 hour, Glucose Tolerance Test
|Alternate Specimen Type||
Red, Li-heparin plasma, K2EDTA, NaF/Na2EDTA, KF/Na2EDTA, NaF/K‑Oxalate
|Specimen Collection / Processing Instructions||
GTT 1H - Administer 50 g glucola 1 hour prior to drawing the patient. Do not mix with water unless directions on product label indicate to do so. The patient does not need to be fasting for the screen. During the test period, the patient should remain inactive and receive nothing by mouth including nicotine products. Small sips of water or ice is permissible.
|Additional Processing Details||
Plasma or serum samples without preservative (NaF) should be separated from the cells or clot within half an hour of being drawn.
8 hours at 25 °C
3 days at 4 °C
Stability in fluoride plasma: 3 days at 15‑25 °C
|Minimum Sample Volume||
|Pediatric Min. Volume (if applicable)||