![]() | This article about biology may be excessively human-centric. |
Bleeding | |
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Other names | Hemorrhaging, haemorrhaging, blood loss |
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A bleeding wound in the finger | |
Specialty | Emergency medicine, hematology |
Complications | Exsanguination, hypovolemic shock, coma, shock |
Bleeding, hemorrhage, haemorrhage or blood loss is blood escaping from the circulatory system from damaged blood vessels.[1] Bleeding can occur internally, or externally either through a natural opening such as the mouth, nose, ear, urethra, vagina or anus, or through a puncture in the skin. Hypovolemia is a massive decrease in blood volume, and death by excessive loss of blood is referred to as exsanguination.[2] Typically, a healthy person can endure a loss of 10–15% of the total blood volume without serious medical difficulties (by comparison, blood donation typically takes 8–10% of the donor's blood volume).[3] The stopping or controlling of bleeding is called hemostasis and is an important part of both first aid and surgery.
Hemorrhage is active bleeding, in which blood escapes from the blood vessels, either into the internal organs and tissues or outside of the body.
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