The action of intramedullary 'K' nail is -: (A) Two-point fixation, (B) Three-point fixation, (C) Compression, (D) Weight concentration
Answer is B. K-nail is used for transverse or short oblique fracture of the femur, especially in the ischemic area.
K-nail (Kuntscher cloverleaf intramedullary nail) provides three points fixation due to elastic deformation.
These three points of fixation are both ends of bone (2 points) and isthmus (3rd point).