[Experimental study on head and neck hemodynamics after ligation of jugular veins]

To study alteration of neck hemodynamics after ligation of jugular veins during radical neck dissection.

4 rhesus monkeys were selected to simulate the human bilateral radical neck dissection. After operation, the jugular veins were ligated or loosen and the blood stream quantities and blood pressure of jugular veins and arteries were measured simultaneously.

The hemodynamic index would changed after jugular vein was ligated, the more the jugular veins were ligated, the greater effects the hemodynamics index of jugular veins were occurred, but there was little effect on arteries.

The external jugular veins have the effect of compensating cerebral venous outflow after removing the internal jugular veins, and the external jugular veins should be conserved when bilateral or unilateral radical neck dissection was done.