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Digital stethoscope

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https://www.readbyqxmd.com/read/28508991/digital-stethoscopes-compared-to-standard-auscultation-for-detecting-abnormal-paediatric-breath-sounds
#1
Ajay C Kevat, Anaath Kalirajah, Robert Roseby
Our study aimed to objectively describe the audiological characteristics of wheeze and crackles in children by using digital stethoscope (DS) auscultation, as well as assess concordance between standard auscultation and two different DS devices in their ability to detect pathological breath sounds. Twenty children were auscultated by a paediatric consultant doctor and digitally recorded using the Littman™ 3200 Digital Electronic Stethoscope and a Clinicloud™ DS with smart device. Using spectrographic analysis, we found those with clinically described wheeze had prominent periodic waveform segments spanning expiration for a period of 0...
May 16, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28488929/mobile-diagnostic-units-for-rural-patients-in-colombia
#2
Luis Fernando Cifuentes
BACKGROUND: The literature on the use of mobile diagnostic units for the adult population is limited. This is a report for the first time in Colombia (Latin America) on the use of mobile diagnostic units for patients in rural areas and resolution of complex cases through telemedicine. INTRODUCTION: Telemedicine is an alternative because it takes advantage of advances in telecommunications and technology for the provision of health services to patients in rural areas of a country...
May 10, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28460759/utility-of-physical-examination-and-comparison-to-echocardiography-for-cardiac-diagnosis
#3
Ashish Patel, Nitin Singh Tomar, Anil Bharani
OBJECTIVE: To find out the accuracy of cardiac auscultation using non-digital stethoscope in physical diagnosis of cardiac diseases. METHODS: We enrolled 104 consecutive patients with abnormal cardiac auscultatory findings attending cardiology clinic and not previously evaluated by echocardiography. One time detailed cardiac physical examination followed by echocardiography within 1 month was undertaken. Agreement between two methods was calculated using mean pair percentage agreement, kappa statistics (κ) and calculation of 95% confidence interval (CI) for kappa statistics...
March 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28269245/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#4
Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero
We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227479/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#5
Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Jose L Garcia-Cordero, Alan Gonzalez-Suarez, Marx Chavez-Campos
We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28199732/a-systematic-review-of-novel-technology-for-monitoring-infant-and-newborn-heart-rate
#6
REVIEW
Ajay C Kevat, Denise V R Bullen, Peter G Davis, C Omar F Kamlin
Heart rate (HR) is a vital sign for assessing the need for resuscitation. We performed a systematic review of studies assessing novel methods of measuring HR in newborns and infants in the neonatal unit. Two investigators completed independent literature searches. Identified papers were independently evaluated, and relevant data were extracted and analysed. CONCLUSION: This systematic review identified seven new technologies, including camera-based photoplethysmography, reflectance pulse oximetry, laser Doppler methods, capacitive sensors, piezoelectric sensors, electromyography and a digital stethoscope...
May 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28150025/initial-field-test-of-a-cloud-based-cardiac-auscultation-system-to-determine-murmur-etiology-in-rural-china
#7
Lee Pyles, Pouya Hemmati, J Pan, Xiaoju Yu, Ke Liu, Jing Wang, Andreas Tsakistos, Bistra Zheleva, Weiguang Shao, Quan Ni
A system for collection, distribution, and long distant, asynchronous interpretation of cardiac auscultation has been developed and field-tested in rural China. We initiated a proof-of-concept test as a critical component of design of a system to allow rural physicians with little experience in evaluation of congenital heart disease (CHD) to obtain assistance in diagnosis and management of children with significant heart disease. The project tested the hypothesis that acceptable screening of heart murmurs could be accomplished using a digital stethoscope and internet cloud transmittal to deliver phonocardiograms to an experienced observer...
February 2, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28138529/epidermal-mechano-acoustic-sensing-electronics-for-cardiovascular-diagnostics-and-human-machine-interfaces
#8
Yuhao Liu, James J S Norton, Raza Qazi, Zhanan Zou, Kaitlyn R Ammann, Hank Liu, Lingqing Yan, Phat L Tran, Kyung-In Jang, Jung Woo Lee, Douglas Zhang, Kristopher A Kilian, Sung Hee Jung, Timothy Bretl, Jianliang Xiao, Marvin J Slepian, Yonggang Huang, Jae-Woong Jeong, John A Rogers
Physiological mechano-acoustic signals, often with frequencies and intensities that are beyond those associated with the audible range, provide information of great clinical utility. Stethoscopes and digital accelerometers in conventional packages can capture some relevant data, but neither is suitable for use in a continuous, wearable mode, and both have shortcomings associated with mechanical transduction of signals through the skin. We report a soft, conformal class of device configured specifically for mechano-acoustic recording from the skin, capable of being used on nearly any part of the body, in forms that maximize detectable signals and allow for multimodal operation, such as electrophysiological recording...
November 2016: Science Advances
https://www.readbyqxmd.com/read/27754183/hw-02-1-is-it-the-end-of-a-long-and-productive-era-the-future-of-the-mercury-sphygmomanometer-and-the-stethoscope
#9
Jinho Shin
Arterial pulsation which had long been studied for estimation of blood pressure or mean blood pressure was replaced by the measurement of systolic and diastolic blood pressure using Korotkoff sound detected by stethoscope in the beginning of the previous century. In the meantime, vast of modern knowledge of human hypertension from epidemiology to randomized clinical trial had been built on the Korotkoff sound and stethoscope methodology. Hypertension is very special clinical entity in terms of the diagnosis is solely dependent on the manual blood pressure measurement by a physician or nurse...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27659352/automated-signal-quality-assessment-of-mobile-phone-recorded-heart-sound-signals
#10
David B Springer, Thomas Brennan, Ntobeko Ntusi, Hassan Y Abdelrahman, Liesl J Zühlke, Bongani M Mayosi, Lionel Tarassenko, Gari D Clifford
Mobile phones, due to their audio processing capabilities, have the potential to facilitate the diagnosis of heart disease through automated auscultation. However, such a platform is likely to be used by non-experts, and hence, it is essential that such a device is able to automatically differentiate poor quality from diagnostically useful recordings since non-experts are more likely to make poor-quality recordings. This paper investigates the automated signal quality assessment of heart sound recordings performed using both mobile phone-based and commercial medical-grade electronic stethoscopes...
October 2016: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27643140/hw-02-1-is-it-the-end-of-a-long-and-productive-era-the-future-of-the-mercury-sphygmomanometer-and-the-stethoscope
#11
Jinho Shin
Arterial pulsation which had long been studied for estimation of blood pressure or mean blood pressure was replaced by the measurement of systolic and diastolic blood pressure using Korotkoff sound detected by stethoscope in the beginning of the previous century. In the meantime, vast of modern knowledge of human hypertension from epidemiology to randomized clinical trial had been built on the Korotkoff sound and stethoscope methodology. Hypertension is very special clinical entity in terms of the diagnosis is solely dependent on the manual blood pressure measurement by a physician or nurse...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27613456/telemedicine-is-as-effective-as-in-person-visits-for-patients-with-asthma
#12
Jay M Portnoy, Morgan Waller, Stephen De Lurgio, Chitra Dinakar
BACKGROUND: Access to asthma specialists is a problem, particularly in rural areas, thus presenting an opportunity for management using telemedicine. OBJECTIVE: To compare asthma outcomes during 6 months in children managed by telemedicine vs in-person visits. METHODS: Children with asthma residing in 2 remote locations were offered the choice of an in-person visit or a telemedicine session at a local clinic. The telemedicine process involved real-time use of a Remote Presence Solution (RPS) equipped with a digital stethoscope, otoscope, and high-resolution camera...
September 2016: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/27566472/a-sneak-peek-into-digital-innovations-and-wearable-sensors-for-cardiac-monitoring
#13
REVIEW
Frederic Michard
Many mobile phone or tablet applications have been designed to control cardiovascular risk factors (obesity, smoking, sedentary lifestyle, diabetes and hypertension) or to optimize treatment adherence. Some have been shown to be useful but the long-term benefits remain to be demonstrated. Digital stethoscopes make easier the interpretation of abnormal heart sounds, and the development of pocket-sized echo machines may quickly and significantly expand the use of ultrasounds. Daily home monitoring of pulmonary artery pressures with wireless implantable sensors has been shown to be associated with a significant decrease in hospital readmissions for heart failure...
August 26, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27328380/digital-auscultation-of-the-uterine-artery-a-measure-of-uteroplacental-perfusion
#14
Diana Riknagel, Birthe Dinesen, Henrik Zimmermann, Richard Farlie, Samuel Schmidt, Egon Toft, Johannes Jan Struijk
This observational study investigated digital auscultation for the purpose of assessing the clinical feasibility of monitoring vascular sounds in pregnancy. The study was performed at the Regional Hospital Viborg, Denmark, and included 29 pregnant women, 10 non-pregnant women and 10 male participants. Digital auscultation was performed with an electronic stethoscope bilaterally near the uterine arteries and correlated to the clinical diagnosis of preeclampsia (PE), intrauterine growth restriction (IUGR) or normal pregnancy in the group of pregnant participants...
July 2016: Physiological Measurement
https://www.readbyqxmd.com/read/27165498/respiratory-modulation-of-oscillometric-cuff-pressure-pulses-and-korotkoff-sounds-during-clinical-blood-pressure-measurement-in-healthy-adults
#15
Diliang Chen, Fei Chen, Alan Murray, Dingchang Zheng
BACKGROUND: Accurate blood pressure (BP) measurement depends on the reliability of oscillometric cuff pressure pulses (OscP) and Korotkoff sounds (KorS) for automated oscillometric and manual techniques. It has been widely accepted that respiration is one of the main factors affecting BP measurement. However, little is known about how respiration affects the signals from which BP measurement is obtained. The aim was to quantify the modulation effect of respiration on oscillometric pulses and KorS during clinical BP measurement...
May 10, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/26728637/development-of-digital-stethoscope-for-telemedicine
#16
Aparna Lakhe, Isha Sodhi, Jyothi Warrier, Vineet Sinha
The stethoscope is a medical acoustic device which is used to auscultate internal body sounds, mainly the heart and lungs. A digital stethoscope overcomes the limitations of a conventional stethoscope as the sound data is transformed into electrical signals which can be amplified, stored, replayed and, more importantly, sent for an expert opinion, making it very useful in telemedicine. With the above in view, a low cost digital stethoscope has been developed which is interfaceble with mobile communication devices...
2016: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/26629704/detection-of-heart-sounds-in-children-with-and-without-pulmonary-arterial-hypertension-daubechies-wavelets-approach
#17
Mohamed Elgendi, Shine Kumar, Long Guo, Jennifer Rutledge, James Y Coe, Roger Zemp, Dale Schuurmans, Ian Adatia
BACKGROUND: Automatic detection of the 1st (S1) and 2nd (S2) heart sounds is difficult, and existing algorithms are imprecise. We sought to develop a wavelet-based algorithm for the detection of S1 and S2 in children with and without pulmonary arterial hypertension (PAH). METHOD: Heart sounds were recorded at the second left intercostal space and the cardiac apex with a digital stethoscope simultaneously with pulmonary arterial pressure (PAP). We developed a Daubechies wavelet algorithm for the automatic detection of S1 and S2 using the wavelet coefficient 'D6' based on power spectral analysis...
2015: PloS One
https://www.readbyqxmd.com/read/26213659/dysphagia-screening-contributions-of-cervical-auscultation-signals-and-modern-signal-processing-techniques
#18
Joshua M Dudik, James L Coyle, Ervin Sejdić
Cervical auscultation is the recording of sounds and vibrations caused by the human body from the throat during swallowing. While traditionally done by a trained clinician with a stethoscope, much work has been put towards developing more sensitive and clinically useful methods to characterize the data obtained with this technique. The eventual goal of the field is to improve the effectiveness of screening algorithms designed to predict the risk that swallowing disorders pose to individual patients' health and safety...
August 2015: IEEE Transactions on Human-machine Systems
https://www.readbyqxmd.com/read/26075332/high-fidelity-digital-recording-and-playback-sphygmomanometry-system-device-description-and-proof-of-concept
#19
Jongshill Lee, Youngjoon Chee, Inyoung Kim, Nikos Karpettas, Anastasios Kollias, Neil Atkins, George S Stergiou, Eoin O'Brien
OBJECTIVES: This study describes the development of a new digital sphygmocorder (DS-II), which allows the digital recording and playback of the Korotkoff sounds, together with cuff pressure waveform, and its performance in a pilot validation study. MATERIALS AND METHODS: A condenser microphone and stethoscope head detect Korotkoff sounds and an electronic chip, dedicated to audio-signal processing, is used to record high-quality sounds. Systolic and diastolic blood pressure (SBP/DBP) are determined from the recorded signals with an automatic beat detection algorithm that displays the cuff pressure at each beat on the monitor...
October 2015: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/26053756/using-k-nearest-neighbor-classification-to-diagnose-abnormal-lung-sounds
#20
Chin-Hsing Chen, Wen-Tzeng Huang, Tan-Hsu Tan, Cheng-Chun Chang, Yuan-Jen Chang
A reported 30% of people worldwide have abnormal lung sounds, including crackles, rhonchi, and wheezes. To date, the traditional stethoscope remains the most popular tool used by physicians to diagnose such abnormal lung sounds, however, many problems arise with the use of a stethoscope, including the effects of environmental noise, the inability to record and store lung sounds for follow-up or tracking, and the physician's subjective diagnostic experience. This study has developed a digital stethoscope to help physicians overcome these problems when diagnosing abnormal lung sounds...
2015: Sensors
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