What is tested in a blood draw with a green-top tube?

Green-top blood collection tubes are generally used to test kidney function, liver function, and blood gas analysis. Fasting is usually required before blood draw to ensure more accurate test results. Specific details are as follows:

1. Kidney Function

The green-top tube contains sodium heparin, which prevents blood coagulation and is commonly used for kidney function testing.

2. Liver Function

The green-top tube is a commonly used method in blood collection and can be applied in liver function tests, helping assess the health status of the liver and understand any existing diseases.

3. Blood Gas Analysis

The green-top tube is generally suitable for biochemical measurements, allowing evaluation of blood gas analysis and red blood cell fragility tests, among others.

In addition, it is recommended to maintain a light diet the day before blood collection and avoid spicy or stimulating foods, as these may affect blood composition and lead to inaccurate test results.