A data packet is received, wherein the data packet includes i) a checksum and ii) a timestamp. The device is fitted to a user’s head and sounds an audible alarm or similar alarm indicator once the angular displacement of the device exceeds a set level. The base 12 further comprises a second base ellipsoidal portion 34 having a second base minor axis 27\u2033 and sharing the major longitudinal axis 38. A first cell of the set of cells enclosing the object is determined. Each bearing surface is adapted to engage a corresponding bearing surface on the cutting insert in a manner such that the cutting insert is pulled against the body when the rotary cutting tool is rotated about the tool axis. With the spin nut and connector fitting engaged, the medical line can be released from the adaptor by twisting and pulling upon the spin nut.