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Time-varying acoustic emission characterization for guidewire coronary artery perforation identification

Artery guidewire-induced perforation during coronary interventions is an uncommon but potentially serious complication with significant morbidity and mortality rates. For minimizing its impact it is crucial for the surgeon to early detect that a perforation has occurred. However, this is not always easy since perforation sometimes is not characterized by any symptom or sign. In this work a time-varying (TV) characterization of coronary artery perforation is proposed through a TV parametrical modeling of an audio signal acquired from the proximal part of a guide wire. Results show that guide wire perforation leaves a characteristic TV trace which can be tracked through the TV-poles and spectrum. This results in clear differentiating patterns allowing around 90% of correct perforation classification.