An apparatus and method for penetrating the bone marrow is provided. The
apparatus includes a housing, a penetrator assembly, operable to
penetrate the bone marrow, a connector operable to releasably attach the
penetrator assembly to a drill shaft, the drill shaft operable to connect
the penetrator assembly to a gear assembly, a gear assembly operable to
engage and rotate the drill shaft, a motor operable to engage the
reduction gear assembly and drive the penetrator into the bone marrow by
rotation of the drill shaft, and a power supply and associated circuitry
operable to power the motor. The apparatus and method may be adapted to
insert a probe through the skull and into the brain.
