De forma amplia, podemos definir hemostasia como «el mecanismo de defensa del organismo que tiene por objeto evitar la hemorragia (o detenerla si se ha producido), mantener la integridad de la pared vascular y restablecer la circulación sanguínea cuando se ha obstruido un vaso». Para ello, consta de cuatro bien diferenciadas, aunque interrelacionadas: 1.-Vasoconstricción local
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