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1. (WO2001035842) METHOD AND DEVICE FOR THE DETERMINATION OF REDUCTION PARAMETERS FOR THE SUBSEQUENT REDUCTION OF A FRACTURED BONE

Pub. No.:    WO/2001/035842    International Application No.:    PCT/CH1999/000538
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Tue Nov 16 00:59:59 CET 1999
IPC: G01B 5/00
A61B 17/60
A61B 17/64
A61B 34/20
A61B 5/107
A61F 5/04
G01B 11/00
G01B 21/00
Applicants: SYNTHES AG CHUR
SYNTHES (U.S.A.)
PERREN, Stephan
MITKOVIC, Milorad
HEHLI, Markus
Inventors: PERREN, Stephan
MITKOVIC, Milorad
HEHLI, Markus
Title: METHOD AND DEVICE FOR THE DETERMINATION OF REDUCTION PARAMETERS FOR THE SUBSEQUENT REDUCTION OF A FRACTURED BONE
Abstract:
The method for the determination of reduction parameters comprises: A) measuring points on the surfaces of the corresponding bones of interest at the patient's left and right side of the body; B) establishing a plane of symmetry containing an anterior-posterior axis and a proximal-distal axis; C) a mirror image of the patient's non-fractured bone is generated symmetrically to the plane of symmetry; and D) the reduction parameters are then determined by comparison of the coordinates of the points at the fractured bone with the coordinates of the points within the mirror image. The device according to the invention comprises: A) a cylindric or prismatic reference bar; B) clamps displaceable on and fastenable to the reference bar; C) screws or pins screwable into the bone transversely to the reference bar within the clamps; and D) an adjustable clamp to fasten a pin capable of being set with its tip to desired points on the surface of the bone.