| 主权项 |
1. A system for providing pins in a patient's pelvis for attaching an orientation sensor in a known relationship to the patient's pelvic axis, the system comprising:
an axis guide for placement over a patient's right and left ASIS having a surgical side and a non-surgical side, the surgical side including at least two guide mating holes; at least two guides attachable to the guide mating holes so as to provide a through hole that is perpendicular to the axis guide; at least two probes, each probe fitting through the through holes and having a locking feature that engages a feature on the guides that locks the axial position of the probe so that it extends by a predetermined distance beyond the end of the axis guide when assembled; and at least two bone engaging pins, each bone engaging pin fitting through the through holes and having a bone engaging feature on its distal end; wherein when the guides are assembled to the axis guide and the probes are assembled to the guides, and the axis guide is placed so that the probes contact the patient's pelvis, the probes can be replaced by the pins so as to mount the pins to the patient's pelvis in a direction that is normal to the patient's coronal plane. |
