While passive leg raising is sometimes used as a
method to increase central blood volume during
resuscitation, only 100-150 mL are transferred to the
intravascular space by this method.19 Intravenous fluids
including blood, colloid and saline solutions are
administered until blood pressure and peripheral
perfusion are satisfactory or until the PAoP is between
12-18 mmHg.
20,21 Replacement of blood loss in an adult
with colloid or crystalloid solutions (e.g. fresh frozen
plasma, 5% albumin, polygeline, 0.9% saline) will cause
a reduction in the haemoglobin by approximately 1
g/100mL per 500 ml of colloid or crystalloid solution
remaining in the vascular compartment.