BiO2 wins an investigational device exemption from the FDA for a pivotal trial of its Angel catheter and inferior vena cava filter in the prevention of pulmonary embolism.BiO2 said it won an FDA nod for a pivotal trial of its Angel catheter and vena cava filter in the prevention of pulmonary embolism.Angel Medical Systems Inc., Food & Drug Administration (FDA)News Well, Clinical Trials, Investigational Device Exemption (IDE), Vascularread more