Safety and Effectiveness of the Akura Thrombectomy System in the Treatment of Acute Pulmonary Embolism

Who can take part

• Patient is > 18 and < 90 years old
• Clinical signs and symptoms consistent with acute PE
• PE symptom duration ≤ 14 days
• CTA evidence of proximal PE (filling defect in at least one main or lobar pulmonary artery as determined by the investigator)
• CTA evidence of RV/LV ratio > 0.9 note: based on Investigator's interpretation of RV/LV ratio at baseline
• Systolic BP ≥ 90 mmHg note: initial SBP may be < 90 mmHg but ≥ 80 mmHg if the pressure recovers with volume resuscitation
• Stable heart rate (HR) < 130 BPM prior to procedure
• Patient is deemed medically eligible for interventional procedure(s), per investigator guidelines and clinical judgment
• Subject or legally authorized representative (LAR) is willing and able to provide written informed consent prior to receiving any non-standard of care protocol specific procedures

Who cannot take part

• Prior PE < 180 days from index procedure
• Thrombolytic use < 48 hours prior to baseline CTA
• Presence of intracardiac lead in right ventricle or atrium placed within 6 months prior to screening assessment
• Cardiovascular or pulmonary surgery within 7 days of index procedure
• Known anaphylactic reaction to radiographic contrast agents that cannot be pretreated
• Current participation in another investigational drug or device treatment study Note: observational or registry studies may be permitted with Sponsor approval
• Pulmonary hypertension with peak pulmonary artery systolic pressure (PASP) >70 mmHg by right heart catheterization
• Actively progressing cancer treated by chemotherapeutics
• Known bleeding diathesis or coagulation disorder
• History of severe or chronic pulmonary arterial hypertension
• History of decompensated heart failure
• History of underlying lung disease that is oxygen dependent
• History of chest irradiation
• History of heparin-induced thrombocytopenia (HIT)
• Known residual iliac deep vein thrombosis (DVT), inferior vena cava (IVC) clot or clot in transit (right atrium and/or right ventricle)
• Platelets count <100,000/µL
• eGFR <30 ml/min per 1.73 m2
• International normalized ratio (INR) >3
• History of chronic left heart disease with left ventricular ejection fraction ≤ 30%
• Vasopressor requirement after fluids to keep pressure at ≥90 mmHg
• FiO2 requirement >40% or >6 LPM to keep oxygen saturation >90%
• Hematocrit <28% (Note: hematocrit required within 6 hrs. of index procedure)
• Major trauma injury severity score (ISS) > 15
• Left bundle branch block
• Contraindication to systemic or therapeutic doses of anticoagulants
• CTA imaging or other evidence that suggest, in the opinion of the investigator, the Subject is not appropriate for aspiration thrombectomy intervention (e.g., inability to navigate to target location, predominantly chronic clot or non-clot embolus)
• Life expectancy <90 days, as determined by investigator
• Female who is pregnant or nursing