Name: Glucose, Fasting
Test Name: Glucose, Fasting
Health Link Test Code: HCFSGLU
LIS Test Code: FSGLU
CPT Code(s): 82947
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Patient should have nothing to eat or drink (except water) for a minimum of 8 hours before test.
Collection Container: Green cap with yellow ring (PST)
Also Acceptable: Green top, Red cap with yellow ring (SST), Red top
Collection Volume: 1 mL
Pediatric Collection Volume: 0.4 mL
PST: 48 hours
SST: 4 days
Sample Analyzed: Plasma or serum
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.2 mL
Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
|0 days to 23 hours||40-60|
|24 hours to 30 days||50-80|
|31 days to 5 years||60-99|
|6 years and up||70-99|
Interpretation Type: Reference Interval
Critical Calls: yes
A fasting glucose greater than or equal to 100 mg/dL, but less than 126 mg/dL, indicates an impaired fasting glucose level and a relatively high risk of developing diabetes.