You may fall asleep as a result of the anaesthetic. Or it might just numb the region being operated on. The operation will last 30 minutes to an hour. Other factors such as blood loss and need for transfusions will determine how long the case takes. Hemorrhagic surgery is any type of surgery that involves cutting into blood vessels or other organs/tissues where blood is released into the environment. This can be detrimental to your health if not done properly. In some cases, blood transfusions are necessary to keep you alive during this time. Blood transfusions involve injecting blood into your body either through an artery or a vein. The goal is to replace lost blood cells with fresh ones. Blood transfusions are used to treat people who have bleeding due to trauma, illness, or pregnancy. Transfusions are also used to prevent potentially fatal effects of anesthesia in patients who have heart problems or are older than 70 years old. The only way to know if you require a blood transfusion is by having tests done before and after surgery. If levels of red blood cells, white blood cells, or platelets decline after surgery, you will likely need one.