Visual, dimensional, material and functional analysis could not be performed as the device was not returned.Device history records could not be reviewed as a valid lot number was not provided and could not be obtained.Complaint history records were reviewed for this catalog number, and no adverse trends were observed.A company representative reported that the chesapeake expandable drill guide disengaged from the implant during surgery while the surgeon was removing awl for the second screw hole.The drill guide was not reattached and the second screw was inserted freehand into the previously created pilot hole.Only 2 screws were used instead of 3.The surgery was being performed at l5-s1.The patient was closed and the surgeon intends to follow up with a posterior fixation case at a later date.It was confirmed that no trouble was faced with the device while attaching or holding the implant.It is likely that the drill guide was not attached adequately with the implant and disengaged while removing the awl during the surgery.
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