Design and Implementation of PC-Based Prototype Electronic Stethoscope for Internet-Based Telemedicine System Application
This paper is a progress report on our recent experiments of the design and implementation of prototype PC-based portable electronic stethoscope for generating four types of auscultation mode that have better auscultation frequency and sound amplifier than acoustic stethoscope. This system has also the software to record the patients’ identity and auscultation sound that useful for medical diagnosis. The four types of auscultation mode that can be selected i.e. normal mode (20 Hz – 2 kHz), respiratory mode (150 Hz – 2 kHz), cardiac mode (20 Hz- 660 Hz) and wheeze mode (60 Hz – 2 kHz). The auscultation sound is recorded by PC in digital form that can be transmitted to the other area/unit through the Internet using GSM/CDMA mobile phone as the telemedicine system application. This prototype utilizes electrets microphone, preamplifier, wide band pass filter, mode selector circuit, 4 filter circuit, audio amplifier and dynamic speaker. This prototype is connected to the Personal Computer for recording patients’ identity and auscultation sound in the database system. The results of preliminary hardware test show that maximum audio amplifier is 38,8dB and the frequencies of auscultation mode have error 0.6%-0.7% from the design specifications. Therefore the auscultation sound can be heard clearly. The software has been tested and has succeeded to record and retrieve the patients’ identity and auscultation sound files.
Dibuat oleh : Hendi Handian R. 1), Soegijardjo Soegijoko 2), Erie Isdyanto 3)
E-mail: hendi_059@yahoo.com, hitamlucu@yahoo.com, soegi@ieee.org
Kata Kunci : Ausculatation, database, electronic stethoscope, internet, PC-based, telemedicine system.
Keterangan : Makalah ini dimuat pada Proceedings BME Days 2008: International Conference on Biomedical Engineering, (ISBN : 978-979-11847-0-9) pada tanggal 11-12 November 2008 di Surabaya, Indonesia.