A bone drill is a nasty-sounding device that looks like something you'd find on the shelf at Home Depot. You wouldn't want to see one coming at you, but if you needed one, you'd likely be in such bad shape that you wouldn't even notice.
The devices, which typically cost about $300 each, are used to access the marrow and vascular system inside bones when a patient's veins have collapsed or are inaccessible. They're standard features in most American ambulances and emergency rooms.
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