Patent ID: 8425525

Claim:
Instrument set for minimally invasive preparation for a bone nailing, comprising: a) at least one base sleeve which has a selected axial length with a drive-in end and a tool working end and an inner diameter selected for holding working sleeves or a nail; b) at least one substantially rigid guide wire which has a selected diameter and a fixing tip at one end; c) at least one dilation sleeve which has an outer diameter adapted to the inner diameter of the base sleeve for guided displacement therein, an end section tapering away therefrom with an outlet opening for the guided longitudinal displacement of the guide wire through this, and a length which is greater than that of the base sleeve; d) at least one working sleeve which has an outer diameter adapted to the inner diameter of the base sleeve or a next largest working sleeve for guided displacement therein, a length which is greater than that of the base sleeve, an inner diameter adapted for guidance of a drill or cutter or a nail to be inserted, and a stop at its one end for engaging with the tool working end of the base sleeve; and e) a fixing extension extending the outlet opening of the dilation sleeve, the inner diameter of which is dimensioned for a sliding seat with the guide wire and the outer surface of which has a polygonal cross-section.