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The complainant reported a patient in acute myocardial infarction/cardiogenic shock was implanted with an impella cp device for mechanical circulatory support.While on support, the patient developed hemolysis, the patient¿s urine was reported to be very dark red, urine analysis red blood count was less than ten and multiple laboratory results were hemolyzed.It was reported attempts were made to reposition the impella, however the patient¿s anatomy made proper placement impossible.Reportedly further hemolyzed laboratory results were noted on (b)(6) 2021, despite repositioning, and the continuous renal replacement therapy.It was also reported on (b)(6) 2021 that the patient¿s ejection fraction was very poor with no apparent recovery and the patient coded three times the day before.The patient was turned down for surgical intervention and the family was being contacted for possible withdrawal of care.Survival outcome at explant noted the patient expired.Medical safety review of the event noted there is not enough information to exclude the impella device as an associated factor in the patient's demise.
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The impella device was not received from the customer, therefore, investigation of the device was not possible.Should the device or any new information be received, a supplemental mdr will be filed.Impella cp with smart assist system instructions for use for the related event are as follows: as noted in the impella ifu: section: potential adverse events (united states) as noted in the impella ifu ¿acute renal dysfunction, aortic valve injury, bleeding, cardiogenic shock, cerebral vascular accident/stroke, death, hemolysis, limb ischemia, myocardial infarction, renal failure, thrombocytopenia and cardiac or vascular injury (including ventricular perforation).¿ section: use of echocardiography for positioning of the impella catheter as noted in the impella ifu ¿evaluate the position of the impella catheter if the automated impella controller displays position alarms or if you observe lower than expected flows or signs of hemolysis.If the catheter does not appear to be correctly positioned, initiate steps to reposition it.¿ impella catheter too far into the left ventricle as noted in the impella ifu ¿obstruction of the impella catheter inlet area can lead to increased mechanical forces on blood cell walls and subsequent hemolysis, which often presents as dark or blood colored urine.¿ section: hemolysis as noted in the impella ifu ¿hemolysis should be monitored during support.Patients who develop high levels of hemolysis may show signs of decreased hemoglobin levels, dark or blood-colored urine, and in some cases, acute renal failure.Plasma-free hemoglobin (pfhgb) is the best indicator to confirm whether a patient is exposed to an unacceptable level of hemolysis¿ as noted in the impella ifu ¿patient conditions¿ including catheter position, pre-existing medical conditions, and small left ventricular volumes¿ may also play a role in patient susceptibility to hemolysis.¿ section: suction as noted in the impella ifu ¿suction may occur if the blood volume available for the impella catheter is inadequate or restricted.Suction limits the amount of support that the impella catheter can provide to the patient and results in a decrease in arterial pressure and cardiac output.It can damage blood cells, leading to hemolysis.It may also be an indicator of right heart failure.¿ this report is being filed as part of a retrospective review of historical records.
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