PROBLEM TO BE SOLVED: To reduce burdens on a patient and an operator, and to reproduce a position and an angle as planned before an operation in a short time.SOLUTION: A guide instrument for artificial joint replacement includes: an emitter cylinder 11 provided with two laser beam emitting parts 11A-11D spreading in a disk shape and a conical shape and a posture detection part 11E for detecting displacement of a posture angle a first abutting and holding part 12 which freely detachably holds the emitter cylinder 11 or a drill member and has an abutting part 12C formed to abut a distal end to a joint part a slider 14 and a rod holding part 16 which hold a first rod 17 for abutting the distal end to the joint part and an imaging part 15 for photographing the shape and the size of respective emitted laser beam tracks, and vary and fix a distance from the first abutting and holding part 12 and the angle a transmission part 11F which transmits images obtained in the imaging part 15 and posture information detected in the posture detection part 11E and a guide rod holding part 18 which has a guide pin holder 19A for guiding the position and direction of drilling, holds a guide rod 19 for abutting the distal end to a joint outer edge, and varies and fixes the position of the guide rod 19.COPYRIGHT: (C)2013,JPO&INPIT【課題】患者と術者の負担を軽減し、短時間で術前計画通りの位置及び角度を再現する。【解決手段】円盤状及び円錐状に広がる2つのレーザ光出射部11A~11D、姿勢角度の変位を検出する姿勢検出部11Eを設けた出射筒体11と、出射筒体11又はドリル部材を着脱自在に保持し、関節部に先端を当接する当接部12Cを形成した第1当接保持部12と、関節部に先端を当接する第1ロッド17、出射した各レーザ光跡の形状及び大きさを撮影する撮像部15を保持し、第1当接保持部12との距離、角度を可変、固定するスライダ14、ロッド保持部16と、撮像部15で得た画像と姿勢検出部11Eで検出した姿勢情報を送信する送信部11Fと、穿孔の位置及び方向をガイドするためのガイドピンホルダ19Aを有し、先端を関節外縁に当接するガイドロッド19を保持し、ガイドロッド19の位置を可変、固定するガイドロッド保持部18とを備える。【選択図】図1
