For both malfunctions, the lot numbers were not provided and lot history reviews were not performed.The devices were not returned to the manufacturer for evaluation; however, medical records were provided for both malfunctions and medical records included images.For both malfunctions, the investigation is confirmed for perforation of inferior vena cava, filter tilt and material deformation.Based upon the available information, the definitive root cause is unknown.The devices are labeled for single use.
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