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Proximal end is widely used in clinic, especially in emergency treatment. Talk about the proximal end Telecentric end It is relative to a certain position, roughly speaking, it can be based on heart But the most scientific one is based on the blood vessels and blood flow direction here. The proximal end is from the upstream of the artery to the heart, and the distal end is from the downstream of the vein to the capillaries. If a blood vessel bleeds, it should first be judged whether it is a vein or an artery. It can be judged according to the depth of the wound, blood flow rate, color, etc. If it is an artery bleeding, it should first be bound near the heart end, and then the far heart end to prevent blood loss. If it is a vein, the distal end should be bound first, and then the proximal end. Blood circulation is also divided into systemic circulation and pulmonary circulation.
