(b)(4).The results of this investigation are inconclusive because the 10mm amplatzer muscular vsd occluder was not returned to sjm for evaluation.A review of the device history record confirmed the occluder met all visual, dimensional, and functional specifications at the time it was manufactured, prior to shipment.There was no evidence to suggest there was an intrinsic defect in the occluder, and the cause for the embolization remains unknown.However, information from the field suggests the chosen device was too small for the defect.
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