J Clin Monit Comput - Heart sounds analysis via esophageal stethoscope system in beagles.

Tópicos

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Resumo

Esophageal stethoscope is less invasive and easy to handling. And it gives a lot of information. The purpose of this study is to investigate the correlation of blood pressure and heart sound as measured by esophageal stethoscope. Four male beagles weighing 10 to 12?kg were selected as experimental subjects. After general anesthesia, the esophageal stethoscope was inserted. After connecting the microphone, the heart sounds were visualized and recorded through a self-developed equipment and program. The amplitudes of S1 and S2 were monitored real-time to examine changes as the blood pressure increased and decreased. The relationship between the ratios of S1 to S2 (S1/S2) and changes in blood pressure due to ephedrine was evaluated. The same experiment was performed with different concentration of isoflurane. From S1 and S2 in the inotropics experiment, a high correlation appeared with change in blood pressure in S1. The relationship between S1/S2 and change in blood pressure showed a positive correlation in each experimental subject. In the volatile anesthetics experiment, the heart sounds decreased as MAC increased. Heart sounds were analyzed successfully with the esophageal stethoscope through the self-developed program and equipment. A proportional change in heart sounds was confirmed when blood pressure was changed using inotropics or volatile anesthetics. The esophageal stethoscope can achieve the closest proximity to the heart to hear sounds in a non-invasive manner.

Resumo Limpo

esophag stethoscop less invas easi handl give lot inform purpos studi investig correl blood pressur heart sound measur esophag stethoscop four male beagl weigh kg select experiment subject general anesthesia esophag stethoscop insert connect microphon heart sound visual record selfdevelop equip program amplitud s s monitor realtim examin chang blood pressur increas decreas relationship ratio s s ss chang blood pressur due ephedrin evalu experi perform differ concentr isofluran s s inotrop experi high correl appear chang blood pressur s relationship ss chang blood pressur show posit correl experiment subject volatil anesthet experi heart sound decreas mac increas heart sound analyz success esophag stethoscop selfdevelop program equip proport chang heart sound confirm blood pressur chang use inotrop volatil anesthet esophag stethoscop can achiev closest proxim heart hear sound noninvas manner

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