Disease States Involving Disturbances of Haemostasis. (Nursing Project)
Disease States Involving Disturbances of Haemostasis.
Normal Human Haemostatic Mechanisms
Haemostasis is the control of blood loss from the circulation, involving a number of separate events including coagulation.
The process is as follows:
1. Vasoconstriction (Vasospasm).
When the initial injury occurs to a blood vessel, it constricts with enough intensity to close the vessel. It occurs as the result of 2 separate mechanisms:
a) local reflexes of the nervous system.
b) biochemical- serotonin and epinephrine are released by aggregated platelets causing vasoconstriction.
Histamine is re…
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