How to Measure Blood Glucose
Aug 03, 2021
Source: Cainiu Health
Dr. Xing Jian
Introduction
When measuring blood glucose, begin by performing the test in the morning, as this generally ensures an 8-hour fasting period. Next, prepare your blood glucose monitoring device, wash your hands thoroughly, and use a small lancet to prick your thumb or finger. Gently squeeze the punctured finger to obtain a drop of blood, then apply the blood to the test strip for analysis. This allows you to clearly determine your fasting blood glucose level.
Hyperglycemia is a relatively common metabolic disorder today. Once blood glucose levels rise abnormally, it may easily progress to diabetes mellitus. Moreover, blood glucose meters are not devices that can be used indiscriminately; failure to observe certain precautions may lead to inaccurate test results. So, how exactly should blood glucose be measured? The following section provides answers to this question.
How to Measure Blood Glucose
When measuring blood glucose, it is recommended to perform the test in the morning, as this generally ensures an overnight fast of at least eight hours. Next, prepare your blood glucose meter and thoroughly wash both hands. Using a lancet, puncture the side of the fingertip (e.g., thumb), then gently massage or squeeze the finger to obtain a sufficient drop of blood. Apply the blood sample directly onto the test strip for analysis. This procedure yields an accurate fasting blood glucose reading. Modern blood glucose meters offer high measurement accuracy; thus, individuals with diabetes who wish to monitor their blood glucose regularly—without frequent hospital visits—may consider purchasing a home-use glucose meter. However, strict adherence to two key requirements is essential: maintaining an eight-hour fast prior to testing and ensuring proper hand hygiene. While various testing protocols exist—including fasting blood glucose and postprandial (after-meal) blood glucose measurements—the fundamental precautions remain largely the same.
Knowledge Extension: Common Errors in Blood Glucose Monitoring
1. Inconsistent Testing Times
Many individuals with diabetes measure their blood glucose at random times—whenever they happen to remember—while skipping tests entirely on busy days. Such inconsistency compromises data reliability and may yield misleading results. To ensure meaningful interpretation and effective comparison of readings, blood glucose monitoring should follow a consistent, scheduled routine.
2. Excessive Squeezing of the Fingertip
Some individuals with diabetes apply excessive pressure to the fingertip during blood collection when insufficient blood flow occurs. However, vigorous squeezing is inappropriate: it forces interstitial fluid and tissue fluids—including lipids—into the blood sample, thereby diluting it. This contamination leads to falsely low or otherwise inaccurate test results.
The above outlines the correct method for measuring blood glucose. We hope this information proves helpful to you.
