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An impella rp flex smartassist was inserted via right femoral vein access in a 48-year-old female patient presenting with acute myocardial infarction and cardiogenic shock.The patient's comorbidities included coronary artery disease and prior coronary artery bypass graft surgery.Prior to initiation of support, the patient was classified as society for cardiovascular angiography and interventions (scai) shock stage e, characterized by hypoperfusion and end-organ dysfunction despite extensive therapeutic intervention and associated with high mortality.Prior to implantation, the patient was supported with inotropes, vasopressors, respiratory support, and extracorporeal membrane oxygenation (ecmo), which served as the primary support modality.On the day following implantation, the medical team identified laboratory evidence of hemolysis with a plasma free hemoglobin level of 600 mg/dl.A repeat plasma free hemoglobin measurement remained elevated at 299 mg/dl.No specific intervention for the reported hemolysis was documented.The patient remained supported with the impella rp flex smartassist and ecmo and was also receiving dialysis during support.After approximately 36 hours of support, the decision was made to withdraw care and the patient expired.During support, the impella rp flex smartassist functioned as intended.No device malfunction, interruption in support, or abnormal pump performance was reported.While on support the device functioned as expected at performance level p-9 with 3.6l/min flow with 5% dextrose in water with sodium bicarbonate in the purge solution.The reported hemolysis is considered multifactorial in nature.Mechanical circulatory support devices are associated with increased red blood cell shear stress and may contribute to hemolysis.Contributing factors in this case may include the concurrent use of both impella rp flex smartassist and ecmo, which can further increase the risk of hemolysis.Additional contributing factors include the patient's dialysis therapy and possible pump movement associated with transfer from the community hospital to the tertiary care center.The patient's death is most likely attributable to the underlying critical clinical condition, including acute myocardial infarction, cardiogenic shock, and scai shock stage e with persistent hypoperfusion and end-organ dysfunction despite maximal medical therapy and multiple forms of mechanical circulatory support.The impella rp flex smartassist functioned as intended throughout the support period, and no device-related malfunction was reported.
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Product complaint # (b)(4).This report is being submitted pursuant to the provisions of 21 cfr, part 803.This report may be based on information which has not been investigated or verified prior to the required reporting date.This report does not reflect a conclusion by abiomed inc or its employees that the report constitutes an admission that the product, abiomed inc, or its employees, caused or contributed to the potential event described in this report.If information is obtained that was not available for the initial report, a follow-up report will be filed as appropriate.
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