A medtronic representative reported that after the surgeon opened the skull flap during a tumor resection, there was a malfunction with the mayfield head-frame.The patient's head was slipping out of the skull pins causing an inaccuracy in relation to the reference frame for navigation.The surgeon immediately noticed the inaccuracy, however as the patient was still in the sterile field, they were unable to re-register with navigation.The patient was repositioned, re-pinned with a different mayfield, and the surgeon completed the surgery without navigation.There was no impact on the outcome of the patient.(b)(4).This report reflects information received by fda in the form of a notification per 803.22 (b)(2).
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