. Modern surgery, general and operative. ^ cm. from the midline and 3 cm. in front of the. Fig. 599.—Opening the mastoid antrum and the lateral sinus; exposure of the temporo-sphenoidal lobe and puncture of the descending horn of the lateral ventricle: a, Temporo-sphenoidal lobe (descending cornu of lateral ventricle is i cm. deeper); b, inner surface ofperiosteum; c, mastoid antrum; d, lateral sinus (Kocher). fissure of Rolando. After an aseptic cerebral operation, as a rule, do not drainunless hemorrhage has been considerable. In many cases after trephiningreplace the bone, but not when the
. Modern surgery, general and operative. ^ cm. from the midline and 3 cm. in front of the. Fig. 599.—Opening the mastoid antrum and the lateral sinus; exposure of the temporo-sphenoidal lobe and puncture of the descending horn of the lateral ventricle: a, Temporo-sphenoidal lobe (descending cornu of lateral ventricle is i cm. deeper); b, inner surface ofperiosteum; c, mastoid antrum; d, lateral sinus (Kocher). fissure of Rolando. After an aseptic cerebral operation, as a rule, do not drainunless hemorrhage has been considerable. In many cases after trephiningreplace the bone, but not when the bone is diseased, is infected, is very com-pact, or if we desire to alter pressure. Control of Hemorrhage in Brain Operations.—Elevation of the patientshead decidedly lessens hemorrhage. A table should be used which permitselevation. If the blood-pressure falls rapidly the head must be rubber band around the head usually controls scalp bleeding; but will actuallyincrease it if there is a large cortical growth with greatly enlarged vesselsjoining intracranial and extracran
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