The common clinical practice of blood gas analysis is to draw arterial blood from an artery using a syringe. The purpose of blood gas analysis is to see if the patient has hypoxemia and acid-base balance disorders. In cases of shock, heart disease, and multiple organ dysfunction, the body may experience hypoxia and acid-base imbalance, and their values are of great significance. It is necessary to adjust the treatment of the patient through the values, so the analysis is still relatively common in clinical use. Most of the parts taken for analysis use arteries, such as the flexor artery in the wrist and the femoral artery in the root of the thigh, etc. After the blood collection is completed, it is necessary for the family members to press the blood collection point a little hard for at least ten minutes, the reason for doing so is to prevent the bleeding of the blood vessel’s eye of the needle.