[Screening for gestational diabetes with capillary blood glucose]

Area of Science:

• Obstetrics and Gynecology
• Endocrinology
• Clinical Chemistry

Background:

• Gestational diabetes mellitus (GDM) diagnosis relies on accurate glucose monitoring.
• Traditional screening methods involve venous blood sampling, which can be invasive.

Purpose of the Study:

• To evaluate the feasibility of using capillary blood glucose measurements for screening gestational diabetes mellitus.
• To determine a potential abnormal threshold for capillary glucose levels in GDM screening.

Main Methods:

• A prospective study involving 220 third-trimester pregnant women.
• Simultaneous collection of capillary and venous blood samples one hour after a 50g oral glucose challenge test.
• Analysis using receiver operator characteristic (ROC) curves to identify threshold values.

Main Results:

• A strong positive correlation (r = 0.87, P < 0.01) was observed between capillary and venous glucose levels.
• A capillary glucose threshold of 9.1 mmol/L was identified as a potential abnormal value for a 100g oral glucose tolerance test (OGTT).
• The consistency rate between capillary and venous glucose tests was 91.8%.

Conclusions:

• Capillary blood glucose testing demonstrates high concordance with venous measurements.
• The proposed capillary glucose threshold of 9.1 mmol/L may serve as an effective screening tool for gestational diabetes mellitus.
• Capillary blood glucose testing offers a potentially less invasive and feasible alternative for GDM screening.