Sign in →

Test Code LAB83 Glucose Tolerance, 1 Hour - Gestational Diabetes Screen

Department

CHEMISTRY

Collection Requirements

Non-fasting.

Give the patient a 50 gram load of a prepared dextrose solution.

Draw a glucose specimen one hour after giving the prepared dextrose.

Primary Collection Container

Green PST (Lithium Heparin)

Alternate Collection Container

Green Microtainer PST

Transport

Plasma refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Separate from cells if testing is delayed more than 2 hours.

Deliver to Chemistry ASAP.

Stability

Refrigerated: 72 hours

Minimum Testing Volume

0.5 mL

Reference Range

68 – <130

Methodology

Hexokinase (HK) Roche c503

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

82950

Unacceptable Conditions

Gross hemolysis.

Delay in separating cells from plasma.

Additional Information

This is a screening procedure for gestational diabetes in pregnant females.

A value of 140 mg/dL or greater one hour after a 50 gram oral glucose load indicates the need for a full diagnostic 100 gram glucose load, three (3) hour glucose tolerance test.