Product: eopa 3d 20 fr arterial cannula from medtronic ref # (b)(4).The silastic ring that hooks into the medtronic straight aortic cannula was not found upon removal from the pt's chest and was suspected have intruded into the ascending aorta.The device did not malfunction; this piece is not attached by design.Surgeon notified mfr and was told this piece was radio-opaque.Xrays and ct's taken and it was not located.Pt did have a cva but it is unk if it is related to this event, as she was high risk.
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