Title :
Phonocardiographic recording from the trachea: use of a special endotracheal tube
Author_Institution :
Dept. of Gen. Anesthesiology, Cleveland Clinic Found., OH, USA
Abstract :
In this report we present a novel method of phonocardiography based on the capture of heart sounds from the cuff of a modified endotracheal tube (ETT). The ETT cuff is connected to a special leak-free microphone using a three-way valve after ETT cuff inflation to around 20 mm Hg pressure. An audio amplifier amplifies the signal from the microphone to a level suitable for recording.
Keywords :
audio recording; audio-frequency amplifiers; biological organs; biomedical electronics; biomedical measurement; cardiology; catheters; medical signal processing; microphones; patient monitoring; 20 mmHg; ETT cuff inflation; audio amplifier; endotracheal tube; heart sounds; leak-free microphone; phonocardiographic recording; three-way valve; trachea; Audio recording; Band pass filters; Esophagus; Heart; Mercury (metals); Microphones; Patient monitoring; Pressure measurement; Stethoscope; Valves;
Conference_Titel :
Engineering in Medicine and Biology Society, 2003. Proceedings of the 25th Annual International Conference of the IEEE
Print_ISBN :
0-7803-7789-3
DOI :
10.1109/IEMBS.2003.1280807
