THE CONTROL OF BLEEDING DURING OPERATION BY INDUCED HYPOTENSION

Abstract

The olfactory groove meningioma is a benign tumor which arises from the midline of the floor of the anterior fossa of the skull, and its removal is beset with difficulties for the following reasons: First, the location of the tumor renders it relatively inaccessible; second, it is a large and vascular growth; third, its nutrient vessels come up through the base of the skull so that they are difficult to control until after the tumor is removed. The best method of dealing with these tumors is to perform a right frontal craniotomy and to excise the portion of the right frontal lobe overlying the lateral aspect of the growth. With the electrosurgical unit the tumor is then removed in fragmentary fashion, after which the nutrient vessels in the floor of the skull at its area of attachment are treated by application of the cautery and bone wax. The loss of