Blood sugar

Glucose in the blood is called blood sugar. Glucose is an important component of the human body and a vital source of energy. A normal human body requires a large amount of sugar daily to provide energy for the proper functioning of various tissues and organs. Therefore, blood sugar must be maintained at a certain level to meet the needs of all organs and tissues in the body. Blood glucose tests come in various forms, including venous blood glucose, capillary blood glucose, interstitial fluid glucose, and arterial blood glucose. The first two are the most commonly used. This article primarily focuses on venous blood glucose. Venous blood glucose: Blood drawn from a vein in the elbow or other sites, and the measured glucose is called venous blood glucose, or more precisely, venous plasma glucose. Capillary blood glucose: Blood drawn from the earlobe or fingertip, and the measured glucose is called capillary blood glucose. Due to numerous factors influencing capillary blood glucose, it is generally not used as a basis for diagnosing diabetes, but rather as a reference for blood glucose monitoring and treatment adjustment in diabetic patients. Based on the relationship with food intake, venous blood glucose can be classified as: Fasting venous blood glucose: Blood glucose measured in the morning after waking up, in a fasting state. 1-hour postprandial venous blood glucose: Blood glucose measured 1 hour after the first bite of a meal. 2-hour postprandial venous blood glucose: Blood glucose measured 2 hours after the first bite of a meal. Random venous blood glucose: Venous blood glucose measured at any time, regardless of fasting or post-meal status. OGTT 1-hour blood glucose: OGTT stands for "Oral Glucose Tolerance Test," which is a test to measure venous blood glucose before and after consuming a sugar solution containing 75 g of anhydrous glucose. It is the standard test for diagnosing diabetes. OGTT 1-hour blood glucose refers to the venous blood glucose measured 1 hour after the first sip of the sugar solution. OGTT 2-hour blood glucose: Refers to the venous blood glucose measured 2 hours after the first sip of the sugar solution.