I know it's just a prop, but for a precision surgical instrument it needs to be more like a Dremel tool or a soldering iron-- or a pencil. Something that can be used in close, single-handed, and allow the fingers to do what they do best-- exert precision control!
The picture of the doctor slicing open someone's stomach shows just how bad a design it is-- two hands to control! Give me an old-fashioned scalpel! An Exacto #11 or #22 blade! Even a single-edged razor blade!
--Paul E Musselman