Human body usually contains 5L of blood (suggestions for a standard male are anywhere from 4.5-7L)
Basically the body can cope with up to 15% loss (750ml). Any more and the heart seriously starts to struggle. Read for yourself, and make an estimate based on the 'photos' of 'Jeff' of how much blood you think is on the ground. I'm a First Aider, and I've seen people slice their hand open with knives & tools and lose a few ml of blood who look paler and struggle to hold it together. To me, it looks like our 'Jeff' should be a whole lot more anxious (medically in shock)
source:http://www.ambulancetechnicianstudy.co. ... X6jNbVOR8EHypovolemic shock
A form of shock. A condition where the heart is unable to supply enough blood to the body because of blood loss, or inadequate blood volume. Clinical symptoms may not present until 10-20% of total whole-blood volume is lost.
Causes and Risks:
Loss of approximately one-fifth or more of the normal blood volume produces hypovolemic shock. The loss can be from any cause, including external bleeding, internal bleeding, or diminished blood volume resulting from excessive loss of other body fluids (such as can occur with diarrhoea, vomiting and burns).
Prevention:
Preventing shock is easier than trying to treat it once it happens. Prompt treatment of the underlying cause will reduce the risk of developing severe shock.
Stages of Hypovolemic Shock
Stage 1
Up to 15% blood volume loss (750mls)
Compensated by constriction of vascular bed
Blood pressure maintained
Normal respiratory rate
Pallor of the skin
Slight anxiety
Stage 2
15-30% blood volume loss (750 - 1500mls)
Cardiac output cannot be maintained by arterial constriction
Tachycardia
Increased respiratory rate
Blood pressure maintained
Increased diastolic pressure
Narrow pulse pressure
Sweating from sympathetic stimulation
Mildly anxious/Restless
Stage 3
30-40% blood volume loss (1500 - 2000mls)
Systolic BP falls to 100mmHg or less
Classic signs of hypovolemic shock
Marked tachycardia >120 bpm
Marked tachypnoea >30 bpm
Decreased systolic pressure
Alteration in mental status (Anxiety, Agitation)
Sweating with cool, pale skin
Stage 4
Loss greater than 40% (>2000mls)
Extreme tachycardia with weak pulse
Pronounced tachypnoea
Significantly decreased systolic blood pressure of 70 mmHg or less
Decreased level of consciousness
Skin is sweaty, cool, and extremely pale (moribund)
@brianv, I'm also not sure what the two photos are showing, regarding the CD case etc.