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A low-cost and effective wearable digital stethoscope for healthcare monitoring through wireless transmission module is proposed in this paper. The design integrates heart and lung sound signal acquisition, amplification, wireless transmission and signal processing using National Instruments Labview. The device can be used to record patients' cardiopulmonary sound. It has further applications for real time monitoring over long distance. The accuracy, robust and cost-effectiveness of this design make it a suitable method for real time visualized signal monitoring over long distance, data storage, replay function and auto disease preliminary assessment.
In India, about 25 percent deaths occurs in the age group of 25 – 69 years because of a cardio-vascular disease [7]. There are numerous diagnostic tests are available that can be used to determine variety of heart disease depending upon risk of heart disease, patient history and the symptoms one might have but the initial diagnose can be done using the stethoscope which is used to hear auscultations. The stethoscope serves as the most frequently employed technique in primary health care especially in rural areas. Sometimes hearing the patient Heart Sound & Murmur which are low amplitude and frequency signal using a stethoscope could lead to the false diagnosis. Also this technique requires lots of expertise and skills which is decreased over the time. The solution of this issue is highly important in early detection of abnormality of heart sound by medical professionals. In this paper, an embedded stethoscope has been designed to serve as a platform for the computer aided diagnosis (CAD) of cardiac sound for the detection of cardiac murmurs. The portable device has ability to hear heart sound in real-time and at the same time display it on TFT LCD Display for visual interpretation. In addition, the heart sound signal can be stored in micro SD card that can be helpful for offline analysis. Critical analysis can be done on the recorded sound signal in time and frequency domain using NI LabVIEW. Software module discloses predominant information about the cardiovascular disorders; hence solve the shortage of specialist doctors and help them in urban as well as rural clinics and hospitals.
New low cost electronic stethoscopes are being developed to address telemedicine needs [6,7,8] and hospital acquired infections [4,5] that will require a means to effectively compare their acoustical performance. While the human ear may detect some qualitative differences between scopes the study here presents an experimental method that measures the step response of different electronic and passive stethoscopes, and then calculates their frequency transfer function so that they may be compared quantitatively. This study presents comparative results of passive stethoscopes (disposable and nurse types) with a commercially available electronic stethoscope (Littmann) and a new, very low cost, electronic stethoscope still in development for medical purposes [6]. This new design utilizes a commercially available cell phone for signal processing. Our results show that both passive and electronic types have resonant type responses resulting in poor low and high frequency transmission, but electronic amplification helps aid the stethoscope function in those extremes. We also show that the new, very low cost, electronic stethoscope design was found to have comparable performance and even better sensitivity to currently marketed electronic stethoscopes.
In this paper, we introduce a visible Bluetooth wireless electronic stethoscope solution, which can separate the sound of heart from cardiopulmonary sound. This new device is based on the embedded system, TCP/IP networking, Bluetooth wireless transmission technology, visualized instrument technology and others. The Bluetooth visual electronic stethoscope can not only separate heart sounds from cardiopulmonary sound at the same time, but also possesses the features of computer real-time display, playback and sound record functions.
IoT Based Smart Health Care Monitoring System
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Design and Implementation of Digital Stethoscope with Heart Defect Detection Algorithm
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Joret 2 and M. Mahadi Abdul Jamil "Design and Development of Wireless Stethoscope with Data Logging Function
- S. Nur Hidayah Malek
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S. Nur Hidayah Malek, W. Suhaimizan Wan Zaki, A. Joret 2 and M. Mahadi Abdul Jamil "Design and Development of Wireless Stethoscope with Data
Logging Function", IEEE International Conference on Control System, Computing and Engineering, 2013.
Electronic stethoscope prototype with adaptive noise cancellation
- N Jatupaiboon
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