RecruitingDevice studyAcute Pulmonary Embolism Treatment With the AlphaVac Multipurpose Mechanical Aspiration System and the AlphaReturn Blood Management System: Evaluation of Safety and EffectivenessThe investigation is intended to evaluate the safety and effectiveness of the AlphaReturn Blood Management System when used in conjunction with the cleared AlphaVac MMA F1885 System for the treatment of acute pulmonary embolism.