Gauge, depth, surgical

Intended purpose

A surgical instrument used to accurately determine the depth of a recess (usually a drilled hole). It typically consists of a moveable (sliding) centrepiece (a prong), the tip of which is inserted into the recess; when the tip makes contact with the bottom a reading is visually taken from a scale marked on the side of the device. The device may remain invasive for some time during particular sugical procedures. It is made of corrosive resistant materials (e.g., stainless steel, titanium), and is reusable.