ISEKI Hiroshi    Department   Research Institutes and Facilities, Research Institutes and Facilities    Position
Language	Japanese
Title	Audio recording system using stethoscope for individual speech voice and heart sound of operating room staff
Conference Type	Nationwide Conferences
Presentation Type	Speech
Date	2008/10/31
Society abstract	日本コンピュータ外科学会誌 10(3),431-432 2008
Summary	Abstract: Introduction: Intraoperative troubles will be reduced by detection of potential incidents, and by the prediction and prevention of hazardous situation. Those incidents and situations can be found in daily surgical operation, which are automatically extracted from recorded audio-visual information using importance evaluation function. Especially for the speech information, recognition of the speaker will enhance the recognition of the atmosphere of the operating room. Heart beat rate will also indicate the intensity of concentration. Method: We implemented a prototype system to record speech voice and heart sound of individual medical staff using chest piece of stethoscope, miniaturized microphone, and transceiver. Wireless communication to recording system does not disturb the surgical operation, compared with wired connection. Results: Laboratory feasibility evaluation was conducted. Though conversation and heart sound were respectively recorded clearly, speech voice drowned out the heart sound. Rustle of clothing generated a lot of noise. Spectrogram of recorded sound showed that each sound of voice, heart, and rustle had different characteristics. Conclusion: Audio recording system using transceiver recorded speech voice and heart sound. Signal processing using software can separate voice and heart sound, and eliminate rustle of clothing.