A digital esophageal stethoscope system for monitoring anesthetized patients’ cardiovascular system

Purpose Esophageal stethoscope is a device to measure heart sound or respiratory sound by inserting a catheter into the patients’ esophagus during operation. It is easy to use, noninvasive, and not influenced by ambient noise, but does not provide the quantitative information about cardiovascular sy...

Full description

Saved in:
Bibliographic Details
Published in:Biomedical engineering letters 2012, 2(4), , pp.265-270
Main Authors: Shin, Ji Yun, Kim, Young Chol, Lim, Seung Woon, Bae, Jin Ho, Shin, Young Duck, Lee, Tae Soo
Format: Article
Language:English
Subjects:
Biological and Medical Physics
Biomedical Engineering and Bioengineering
Biomedicine
Biophysics
Engineering
Medical and Radiation Physics
Original Article
의공학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Purpose Esophageal stethoscope is a device to measure heart sound or respiratory sound by inserting a catheter into the patients’ esophagus during operation. It is easy to use, noninvasive, and not influenced by ambient noise, but does not provide the quantitative information about cardiovascular system. Thus, in this study, we tried to develop a digital esophageal stethoscope system (DESS) that can be used to monitor the heart sounds of anesthetized patients during operation. Methods It consists of the wireless sensor module and the base station. The wireless sensor module acquires and amplifies heart sound data with microphone connected to esophageal catheter and transmits the data to the base station through Bluetooth. The base station is composed of a receiver and a PC. The receiver processes and forwards the heart sound data to a PC, where MatLab based software (Cardiac Sound Analyzer) records and displays the heart sound as phonocardiogram and spectrogram in time and frequency domain in real time. Besides, it can quantify and objectify heart sound information by calculating its intervals, heart rates, and intensity values in dB. Results We performed a pilot experiment with patients under general anesthetic surgery and evaluated the performance of the developed system. Conclusions This system is so simple and useful for anesthesiologist to evaluate the included information on cardiac condition without being disturbed by ambient noise and is helpful for comparing a patient’s states before and after surgery.
ISSN:2093-9868
2093-985X
DOI:10.1007/s13534-012-0080-9