A1cNow InView: a new simple method for office-based glycohemoglobin measurement

Area of Science:

• Clinical Chemistry
• Point-of-Care Testing
• Diabetes Mellitus Diagnostics

Background:

• Glycohemoglobin A1c (HbA1c) is crucial for monitoring glycemic control in diabetes.
• Portable HbA1c devices offer immediate results, enhancing patient self-management.
• Evaluating new point-of-care devices is essential for clinical practice.

Purpose of the Study:

• To assess the accuracy and precision of the A1cNow InView capillary monitor.
• To determine the device's suitability for use in physicians' offices.
• To compare the device's performance against a reference laboratory standard.

Main Methods:

• Tested 35 EDTA-preserved whole blood samples with HbA1c results ranging from 4% to 13%.
• Measured HbA1c using the A1cNow InView capillary monitor and a reference laboratory.
• Analyzed device precision by measuring one sample nine times; assessed consistency via linear regression.

Main Results:

• Correlation coefficient between the InView device and the reference laboratory was 0.96.
• The coefficient of variation for the device was 2.71%, indicating high precision.
• Thirty-five samples were tested, demonstrating strong agreement with established methods.

Conclusions:

• The A1cNow InView capillary monitor demonstrates reliable accuracy and precision.
• Further prospective studies are needed to verify feasibility, reproducibility, and cost-effectiveness in real-world clinical settings.
• The device shows potential for improving diabetes care through immediate point-of-care results.