(b)(6) healthcare is the initial importer of the device which is a wheelchair.(b)(6) has not received the unit back for evaluation.If we receive the unit back we will file a follow-up submission.The wheelchair was in use when a bolt came loose from its nut.The wheel came lose.The end-user fell.It is reported that the end-user sustained serious and permanent injuries "including, but not limited to, brain trauma resulting in multiple seizures and brain surgery.".