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Structural failure of a Starr-Edwards aortic track valve
R E Ringel1, A L Moulton, J E Burns
1Division of Pediatric Cardiology, University of Maryland Hospital, Baltimore, Maryland 21201, USA.
Texas Heart Institute Journal
|March 1, 1983
Summary
Sudden structural failure of a Starr-Edwards aortic valve occurred 4 years post-implantation. Examination revealed fractured struts, a previously undocumented malfunction in this medical device.
Area of Science:
- Biomedical Engineering
- Cardiovascular Surgery
- Materials Science
Background:
- Mechanical heart valves are crucial for treating valvular heart disease.
- Starr-Edwards valves have a long history of use, but long-term durability can be a concern.
- Understanding device failure modes is critical for patient safety and future design.
Purpose of the Study:
- To report a novel structural failure mode of a Model 2400 Starr-Edwards aortic valve.
- To investigate the cause of sudden valve malfunction after 4 years of implantation.
Main Methods:
- Surgical explantation of the aortic valve prosthesis.
- Macroscopic and microscopic examination of the excised valve components.
- Analysis of strut integrity and fracture points.
Main Results:
- Sudden structural failure of the Model 2400 Starr-Edwards aortic valve occurred 4 years after implantation.
- Examination revealed fractures in three struts above their insertion into the valve ring.
- Minimal cloth wear and no signs of infection were observed on the explanted prosthesis.
Conclusions:
- Fracture of the valve struts represents a previously uncharacterized failure mechanism for this specific aortic valve model.
- This finding highlights the importance of continued surveillance and investigation of long-term device performance.
- Further research may be needed to understand the biomechanical factors leading to strut fracture in Starr-Edwards valves.