As the lot number for the device was not provided, a review of the device history records could not be performed.The sample was not returned to the manufacturer for inspection/evaluation.Therefore, the investigation of the reported event is inconclusive.Based upon the available information, the definitive root cause for this event is unknown.The instructions for use (ifu) is adequate for the reported device/patient code(s) and provides general instructions for use, as well as warnings, precautions and potential complications associated with the device.Upon receipt of new or additional information, a follow-up report will be submitted as applicable.Takuro inoue, satoshi shitara, yukihiro goto, abrar arham, mustaqim prasetya, lori radclife, et al (2021).Bridge technique for hemifacial spasm with vertebral artery involvement.Acta neurochirurgica, 163:3311¿3320.Doi: 10.1007/s00701-021-05006-8.
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