Comparison of First and Second Capillary Blood Drops for Blood Glucose Measurement

This study aimed to evaluate the effects of different capillary blood sampling techniques on blood glucose measurement results in people with diabetes. Blood glucose measurements obtained from the first and second capillary blood drops after antiseptic application were compared. In addition, measurements obtained with and without finger squeezing were evaluated. The findings may contribute to improving standardization in capillary blood glucose monitoring procedures and reducing unnecessary repeated finger punctures in clinical practice.

Inclusion Criteria: * Aged 18 years or older * Diagnosed with diabetes mellitus * Provided written and verbal informed consent to participate in the study * Eligible for blood glucose measurement after at least 6 hours of fasting * No condition preventing capillary blood sampling from the fingertip * Physically and mentally able to undergo the measurement procedures specified in the study Exclusion Criteria: * Presence of a physical disability or deformity affecting fingertip blood glucose measurement * Presence of coagulation disorders (e.g., hemophilia) or severe medical conditions affecting blood sampling * Use of steroids within the previous 24 hours that could affect blood glucose levels * Presence of physical or mental conditions limiting compliance with study procedures * Inability or unwillingness to provide informed consent