#hemorrhage

Hemorrhage doodle :]

Hemorrhage is defined as a loss of 15% or more of the total blood volume. An adult human body generally has between 4500 and 5500 mL of blood. People can usually lose up to 14% of their blood volume (between 630 and 770 mL [1.3 to 1.6 pints] depending on the total volume) without experiencing symptoms. After 15% (Class I), hemorrhage is divided into three classes:

Class II: 15% to 30%

Class III: 30% to 40%

Class IV: more than 40%

Hemorrhage can be external or internal. Internal hemorrhage may manifest with blood in the vomit, urine, or stool or there may be no visible blood.

Hypovolemic shock, or shock caused by too little circulating blood, can occur at any point in the hemorrhage and is divided into three degrees:

Mild (15% to 25%): characterized by sweating, weakness, fast heart rate, and a slight fall in blood pressure

Moderate (25% to 35%): characterized by pallor, restlessness, reduced urine output, and a moderate fall in blood pressure

Severe (35% to 50%): characterized by a significant fall in blood pressure, agitation, confusion, and no urine output

Hemorrhage is treated by controlling the source of bleeding, if possible, and initiating fluid resuscitation with saline or lactated ringer solution through large bore IVs. Blood and blood product transfusions are also indicated when there has been a significant loss of blood components such as red blood cells. Oxygen is also administered, as oxygen saturation tends to drop as the body loses more red blood cells.

If there's anything specific you want to know, send me another ask!

Don't fall away, and leave me to myself

Don't fall away, and leave love bleeding in my hands

Let's see if I phrase this one right it's been rolling in my brain a bit

Assumptions are the character heals a slower than Wolverine and they've just suffered some serious blood loss. Like they lost ~3L of it and the wound has now closed up and the body's working to create as much blood as possible.

Given how bone marrow is where blood comes from, what sorts of things might they have to deal with in the recovery period? Like, as the body is taxing the marrow like that (and/or whatever else it has to)?

I'm going to assume this is a ~200lb man, just to give some leeway. So a big guy like this would have maybe 6 liters of blood in him (most humans range from 4-6 L). If he loses ~3 L, I would say he would probably just die. If blood loss is >40%, that's a Class IV hemorrhage, which presents with absent peripheral pulses, hypotension (low blood pressure), and no peepee output. This person will go into hemorrhagic shock. Since they lack the oxygen-carrying hemoglobin that is found in blood, they will not be able to supply oxygen to their tissues. This stops the usually metabolic processes and switches the body to anaerobic metabolism, which makes lactic acid and very little ATP (energy). Lactic acid leads to acidosis. Acidosis leads to cell death, coma, and plain ole death. He will die.