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General Information

Websites

Mayo Clinic Laboratories

Lima Memorial Health System

Mayo Clinic Laboratories

Test Code GL2 Glucose, 2-Hour Postprandial, Plasma or Serum

Performing Laboratory

Lima Memorial Health System Laboratory

Specimen Requirements

Patient Preparation

1. Patient should eat an adequate meal 2 hours prior to draw as specified by physician. Patient is allowed his/her usual meal (breakfast or lunch).

2. At end of 2 hours, draw specimen as follows:

 

Preferred:
Container/Tube: Green cap-yellow ring Top (Lithium Heparin Gel) tube
Minimum Volume: 1.0 mL 
Collection Instructions:  Centrifuge within 2 hours of collection.
Also Acceptable:
Container/Tube: Plain, Red Top or Serum gel (SST-Gel) tube

Reference Values

65-120 mg/dl

Alarm values (automatic call-back):  <50 mg/dL or >400 mg/dL

Specimen Stability

Ambient: 8 hours
Refrigerate: 48 hours
Frozen: aliquot for longer storage

Day(s) Test Set Up

Monday through Sunday

Methodology

Hexokinase G-6-PDH

Test Classification and CPT Coding

82947

Mnemonics

GL2, GLUPP