A 1cm-diameter hole cut in the skull using a drill.
a surgical opening in the skull that is usually about the size of a nickel
A hole drilled in the skull. This is usually to suck out a collection of blood or to insert a gauge for monitoring INTRACRANIAL PRESSURE (qv). Before the advent of the CT SCAN (qv), burr holes were drilled in some circumstances as an exploratory procedure.
A small opening in the skull made with a surgical drill.
Surgical hole made in the skull