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Boring sensor for intramedullary nail and corresponding intramedullary nail

  • US 4,781,181 A
  • Filed: 08/26/1986
  • Issued: 11/01/1988
  • Est. Priority Date: 08/27/1985
  • Status: Expired due to Term
First Claim
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1. A boring sensor for use with an intramedullary nail having a wall defining an internal cavity, a screw hole in the wall and a longitudinal axis, for drilling a passage in the cortical wall of a bone, said boring sensor comprising:

  • a guiding and positioning unit axially movable in said internal cavity of the nail, said unit including a passage extending therethrough, said passage including a first portion substantially parallel with the axis of the nail and a second portion forming an angle with the first portion, said second portion terminating in a distal orifice on a surface of the unit;

    a sheath having a proximal end exiting the internal cavity of said nail substantially parallel to the axis of said unit and a distal end connected with said unit and in open communication with said passage, said sheath including a bore extending therethrough from said proximal end to said distal end thereof;

    a flexible shaft rotatably positioned in said sheath and said passage, said flexible shaft having a distal end with a boring head thereat and a proximal end adapted to be coupled to a rotary motor; and

    positioning means on said unit for cooperating with positioning means of said nail to position the distal orifice of said unit in line with said screw hole in the wall of said nail.

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