GLUCOSE

Mnemonic

GLUC

Synonym

Sugar in serum or plasma

Specimen Collection Requirements

Collect

Preferred: Plasma, one 4.0 mL gray (sodium fluoride/potassium oxalate) top tube Also acceptable: Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

The gold and green top tubes must be delivered to the lab immediately. Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferably, separate serum or plasma from cells within 1 hour of collection. If unable to spin, preferred specimen is gray (sodium fluoride/potassium oxalate) top tube.

Preferred Volume

0.5 mL

Minimum Volume

0.3 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Serum or Heparin Plasma specimens not separated from cells within 2 hours.

Specimens separated from the cells > 1 hour and <2 hours after collection may be tested, but glucose results will be falsely decreased.

This does not apply to sodium fluoride/potassium (gray top) specimens.

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient (15-25°C): 8 hours; Refrigerated (2-8°C): 3 days; Frozen (at or below -20°C): 1 month

Testing Information

Performed

7 days/week

Method

Colorimetry

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Male and Female fasting (age-adjusted ranges):

0-2 days: 40-60 mg/dl

2 days-1 year: 50-80 mg/dl

1-13 years: 61-110 mg/dl

> 13 years: 70-99 mg/dl

Critical Values

Male and Female (age-adjusted critical values):

0-7 days: <30 or >300 mg/dl

7 days-1 year: <45 or >300 mg/dl

>1 year: <60 or >400 mg/dl

CPT Codes

82947

Last Updated: Tuesday, June 27, 2017 08:54:43 AM