Pyrolytic carbon mechanical bileaflet heart valves beat over 30 million times per year. Microscopic cavitation and hinge wear can lead to leaflet jamming and acute fatal hemodynamic collapse. This engineering research outlines the integration of inductive micro-coils measuring sub-micron hinge travel variations across decades of clinical operation.
Eddy current micro-sensors integrated into the titanium valve ring track leaflet transit times with 50-nanosecond precision, alerting cardiologists to micro-thrombus accumulation long before echocardiography can detect regurgitation.
Acoustic emission piezoelectric transducers embedded in the sewing ring capture high-frequency cavitation collapse signals, guiding anticoagulant dosage titration to prevent mechanical wear and systemic thromboembolism.