Article Figures & Tables
Tables
- Box 1: Blood glucose test results for a 53-year-old woman with sickle cell anemia, by method of measurement
Method Result, mmol/L Venous blood sample without an inhibitor of glycolysis (multiple measurements) 2.6–3.4 Capillary blood sample (twice daily over 2 wk) 3.9–5.1 Fasting whole blood sample using a blood gas analyzer 4.8 Fasting venous blood sample collected in a tube containing sodium fluoride 4.6 - Box 2: Commonly encountered sources of artifacts in measurements of blood glucose
Measurement method Reason for falsely low blood glucose Reason for falsely elevated glucose Capillary glucose Decreased circulation (2) (hypotension, Raynaud phenomenon, peripheral vascular disease)
Analytical errors (3) (high hematocrit, high oxygen levels [> 100 mm Hg], test strip expiry)
Operator error (3)
Venous glucose Leukocytosis (1), (2) (leukemia, (2) reactive leukocytosis (4))
Reticulocytosis (1), (2) (polycythemia vera, (2), (5) chronic hemolytic anemia (6))
Prolonged delay in transport or analysis (1)
Hyperviscosity (2)
Subcutaneous glucose monitor Local compression (7)
Presence of salicylic acid (8)
First 12 h of new sensor (8)
Acetaminophen (9)*
Hydroxyurea (9)
Vitamin C (8)
↵* Method dependent.