MAUDE Adverse Event Report: LIVANOVA CANADA CORP. MITROFLOW LXA; TISSUE HEART VALVE

Model Number LXA23

Device Problem Degraded (1153)

Patient Problems Aortic Insufficiency (1715); Heart Failure (2206); Cardiogenic Shock (2262); Respiratory Failure (2484)

Event Date 05/21/2020

Event Type  Injury  

Manufacturer Narrative

Since the device was not returned, no further testing on the device are possible at this time.However, the results of the pathological examination performed at the hospital lab were received and confirmed the absence of vegetation or masses on the explanted prosthesis.The report also records the presence of leaflet fragments, ''having thickened yellow-tan appearance." based on the available information, it is not possible to draw a definitive conclusion on the reported event.As reported in the scientific literature, structural valve deterioration is the major cause of failure of bioprosthetic heart valves.It is possible that the patient¿s clinical history and risk factors (hypertension, hyperlipidemia) may have contributed to the structural valve deterioration observed in this mitroflow valve (although not further discussed in the pathology report received, the, "thickened yellow-tan appearance" noted in the leaflet suggests the presence of lipid infiltration which may be related to the hyperlipidemia reported).It should be noted that structural valve deterioration is listed as a possible adverse event in the mitroflow ifu.The event is, therefore, a known inherent risk of the device.The manufacturer is presently retrieving and reviewing the device history records of this device.A follow up report will be provided upon completion of the investigation.

Event Description

The manufacturer was informed on this event through the device tracking department.Based on the information reported on the patient implant form, a mitroflow lxa23 that was implanted on (b)(6) 2012 was explanted on (b)(6) 2020.Based on additional information provided, it was reported that the patient did well up until (b)(6) 2020, when the patient presented to the emergency room in florid pulmonary edema, cardiogenic shock.Echocardiography confirmed severe aortic valve insufficiency with probably either a torn leaflet or disruption, no signs for endocarditis.The patient received an impella to relieve the volume load and over the course of the next 48 hours the patient's condition stabilized nicely.A valve replacement was then performed.Upon inspection, the aortic valve did have some flimsy material on it, although it did not appear at all infected.The right coronary leaflet was fibrotic and rigid, and this was reportedly the cause of the leak.A decision was made to implant a mechanical valve this time, and a carbomedics s5-021 was ultimately implanted.The patient was transferred back to the icu in stable conditions and recovered well postoperatively.The patient was restarted on anticoagulation and was discharged to home on (b)(6) 2020, with close follow up.The principal discharge diagnosis was of cardiogenic shock, acute systolic heart failure with reduced ejection fraction, acute hypoxic respiratory failure, failed aortic valve.

Manufacturer Narrative

The manufacturing and material records for the mitroflow bioprosthetic pericardial heart valve, model # lxa23, s/n # (b)(6), as they pertain to the reported event, were retrieved and reviewed by quality engineering at livanova canada corp.The results confirmed that this valve satisfied all material, visual, and performance standards required for a lxa23 mitroflow aortic pericardial heart valve at the time of manufacture and release.The root cause analysis previously provided remains unchanged.

• Brand Name: MITROFLOW LXA
• Type of Device: TISSUE HEART VALVE
• Manufacturer (Section D): LIVANOVA CANADA CORP.; 5005 north fraser way; burnaby, bc
• MDR Report Key: 10766966
• MDR Text Key: 216114505
• Report Number: 3004478276-2020-00227
• Device Sequence Number: 1
• Product Code: LWR
• UDI-Device Identifier: 00896208000115
• UDI-Public: (01)00896208000115(240)LXA23(17)161231
• Combination Product (y/n): N
• PMA/PMN Number: P060038
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,health
• Type of Report: Initial,Followup
• Report Date: 11/11/2020

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Expiration Date: 12/31/2016
• Device Model Number: LXA23
• Device Catalogue Number: LXA23
• Was Device Available for Evaluation?: No
• Was the Report Sent to FDA?: No
• Initial Date Manufacturer Received: 10/02/2020
• Initial Date FDA Received: 10/30/2020
• Supplement Dates Manufacturer Received: 11/10/2020
• Supplement Dates FDA Received: 11/11/2020
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Age: 76 YR