(b)(4).Synovis has elected to submit mdrs related to coupler malfunctions regardless if the event was considered likely or unlikely to cause or contribute to death or serious injury.The device history record for this lot number was reviewed.100% visual inspection for broken or missing parts and pin alignment is performed on each assembly during the manufacturing process.The ring retention force is within specification.According to the device history record, the device met specification prior to market release.Two coupler rings and one wing jaw assembly were returned for evaluation.Both coupler rings appeared to be in good condition.Three pins of one coupler ring were bent.Both rings had visual evidence of blood and/or tissue.The wing jaw assembly also had residual dry blood.No functional testing was performed.The coupler rings were returned loose, not in the wing jaw assembly.The customer report states that the ring slid out during setup, but both rings have blood on the surface, which would indicate that the ring was in contact with the patient or surgical field.The event could not be confirmed.There is no immediate evidence to support why the ring did not stay in the wing jaw during use.No additional information is available at this time.
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