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https://www.readbyqxmd.com/read/29136608/variation-of-the-korotkoff-stethoscope-sounds-during-blood-pressure-measurement-analysis-using-a-convolutional-neural-network
#1
Fan Pan, Peiyu He, Chengyu Liu, Taiyong Li, Alan Murray, Dingchang Zheng
Korotkoff sounds are known to change their characteristics during blood pressure (BP) measurement, resulting in some uncertainties for systolic and diastolic pressure (SBP and DBP) determinations. The aim of this study was to assess the variation of Korotkoff sounds during BP measurement by examining all stethoscope sounds associated with each heartbeat from above systole to below diastole during linear cuff deflation. Three repeat BP measurements were taken from 140 healthy subjects (age 21 to 73 years; 62 female and 78 male) by a trained observer, giving 420 measurements...
November 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/29127555/continuous-monitoring-of-blood-pressure-by-analyzing-the-blood-flow-sound-of-arteriovenous-fistula-in-hemodialysis-patients
#2
Yuka Kamijo, Eiichiro Kanda, Hayato Horiuchi, Noriyuki Kounoue, Keisuke Ono, Keizo Maeda, Akane Yanai, Kazuya Honda, Ryuji Tsujimoto, Mai Yanagi, Yoshitaka Ishibashi, Masayuki Yoshida
BACKGROUND: Patients with end-stage renal disease undergoing hemodialysis (HD) have an elevated risk of cardiovascular disease-related morbidity and mortality. To prevent from such a life-threatening event, the continuous blood pressure (BP) monitoring system may contribute to detect BP decline in early stages and may help to do appropriate disposal. Our research team has introduced an electronic stethoscope (Asahi Kasei Co, Ltd., Tokyo, Japan), which translates sound intensity of Arteriovenous Fistula (AVF) to BP data using the technique of Fourier transformation that can predict continuous BP non-invasively...
November 10, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29072875/oxford-specialist-handbooks-in-neurology-stroke-medicine
#3
Jennie McNaught
This is a pocket sized book (if your pockets are 20×18×2 cm big, that is) and it weighs less than two decent stethoscopes. Its small physical size belies the comprehensive coverage given to the subject. It is a really a compact textbook covering all aspects of stroke care.
2017: Acute Medicine
https://www.readbyqxmd.com/read/29065922/persisting-demand-and-supply-gap-for-maternal-and-newborn-care-in-eastern-uganda-a-mixed-method-cross-sectional-study
#4
Rornald Muhumuza Kananura, Suzanne Namusoke Kiwanuka, Elizabeth Ekirapa-Kiracho, Peter Waiswa
BACKGROUND: The slow progress in reducing maternal and newborn death in low and middle-income countries is attributed to both demand and supply-side factors. This study assessed the changes in maternal and newborn services in health facilities as well as demand for maternal and newborn health services in Eastern Uganda. METHODS: The health assessment data were collected in August 2013 and September 2015 in the districts of Kamuli, Pallisa, and Kibuku. We purposively collected data on the availability of services from 40 health facilities that provided maternal and newborn services...
October 24, 2017: Reproductive Health
https://www.readbyqxmd.com/read/29060920/automated-lung-sound-analysis-for-detecting-pulmonary-abnormalities
#5
Shreyasi Datta, Anirban Dutta Choudhury, Parijat Deshpande, Sakyajit Bhattacharya, Arpan Pal
Identification of pulmonary diseases comprises of accurate auscultation as well as elaborate and expensive pulmonary function tests. Prior arts have shown that pulmonary diseases lead to abnormal lung sounds such as wheezes and crackles. This paper introduces novel spectral and spectrogram features, which are further refined by Maximal Information Coefficient, leading to the classification of healthy and abnormal lung sounds. A balanced lung sound dataset, consisting of publicly available data and data collected with a low-cost in-house digital stethoscope are used...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060917/a-robust-dataset-agnostic-heart-disease-classifier-from-phonocardiogram
#6
Rohan Banerjee, Anirban Dutta Choudhury, Parijat Deshpande, Sakyajit Bhattacharya, Arpan Pal, K M Mandana
Automatic classification of normal and abnormal heart sounds is a popular area of research. However, building a robust algorithm unaffected by signal quality and patient demography is a challenge. In this paper we have analysed a wide list of Phonocardiogram (PCG) features in time and frequency domain along with morphological and statistical features to construct a robust and discriminative feature set for dataset-agnostic classification of normal and cardiac patients. The large and open access database, made available in Physionet 2016 challenge was used for feature selection, internal validation and creation of training models...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060901/novel-features-from-autocorrelation-and-spectrum-to-classify-phonocardiogram-quality
#7
Deepan Das, Rohan Banerjee, Anirban Dutta Choudhury, Sakyajit Bhattacharya, Parijat Deshpande, Arpan Pal, Kayapanda M Mandana
Phonocardiogram (PCG) or auscultation via a stethoscope forms the basis of preliminary medical screening. But PCG recorded in an uncontrolled environment is inherently noisy. In this paper we have derived novel features from the spectral domain and autocorrelation waveforms. These are used to identify the quality of a PCG recording and accepting only diagnosable quality recordings for further analysis. These features proved to be robust irrespective of variations in devices and in data collection protocols employed to ensure consistent data quality...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060470/detection-of-explosive-cough-events-in-audio-recordings-by-internal-sound-analysis
#8
B M Rocha, L Mendes, R Couceiro, J Henriques, P Carvalho, R P Paiva
We present a new method for the discrimination of explosive cough events, which is based on a combination of spectral content descriptors and pitch-related features. After the removal of near-silent segments, a vector of event boundaries is obtained and a proposed set of 9 features is extracted for each event. Two data sets, recorded using electronic stethoscopes and comprising a total of 46 healthy subjects and 13 patients, were employed to evaluate the method. The proposed feature set is compared to three other sets of descriptors: a baseline, a combination of both sets, and an automatic selection of the best 10 features from both sets...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060434/a-comparative-study-of-electronic-stethoscopes-for-cardiac-auscultation
#9
C Pinto, D Pereira, J Ferreira-Coimbra, J Portugues, V Gama, M Coimbra
There are several electronic stethoscopes available on the market today, with a very high potential for healthcare namely telemedicine, assisted decision and education. However, there are no recent comparatives studies published about the recording quality of auscultation sounds. In this study we aim to: a) define a ranking, according to experts opinion of 6 of the most relevant electronic stethoscopes on the market today; b) verify if there are any relations between a stethoscope's performance and the type of pathology present; c) analyze if some pathologies are more easily identified than others when using electronic auscultation...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060142/classification-of-voluntary-coughs-applied-to-the-screening-of-respiratory-disease
#10
Christian Infante, Daniel B Chamberlain, Rahul Kodgule, Richard Ribon Fletcher
Pulmonary and respiratory diseases (e.g. asthma, COPD, allergies, pneumonia, tuberculosis, etc.) represent a large proportion of the global disease burden, mortality, and disability. In this context of creating automated diagnostic tools, we explore how the analysis of voluntary cough sounds may be used to screen for pulmonary disease. As a clinical study, voluntary coughs were recorded using a custom mobile phone stethoscope from 54 patients, of which 7 had COPD, 15 had asthma, 11 had allergic rhinitis, 17 had both asthma and allergic rhinitis, and four had both COPD and allergic rhinitis...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060123/a-novel-acoustic-catheter-stethoscope-based-acquisition-and-signal-processing-framework-to-extract-multiple-bio-signals
#11
Prashanth Chetlur Adithya, Ravi Sankar, Wilfrido A Moreno, Stuart Hart
In this study, a novel acoustic stethoscope based on an intravenous catheter was introduced to measure vascular pressures from a Yorkshire pig. Our hypothesis is that by means of this single device (measurement system) and by applying signal analysis and processing framework, multiple vital bio signals can be extracted. In contrast, current conventional state-of-the-art technologies use multiple devices to provide the same information. The framework used to extract these bio signals consisted of a noise cancellation technique and wavelet based source separation...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29033010/stethoscope-a-short-autobiography
#12
EDITORIAL
V P Singh
No abstract text is available yet for this article.
September 29, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28976861/the-other-end-of-the-stethoscope
#13
Evan F Joiner
New England Journal of Medicine, Volume 377, Issue 14, Page 1315-1317, October 2017.
October 5, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28949087/effect-of-spontaneous-saliva-swallowing-on-short-term-heart-rate-variability-hrv-and-reliability-of-hrv-analysis
#14
Metin Yildiz, Serian Doma
The effects of effortful swallowing and solid meal ingestions on heart rate variability (HRV) have been examined previously. The effects of spontaneous saliva swallowing on short-term HRV and reliability of HRV analysis have not been studied before. The effect of saliva swallowing on HRV analyses parameters [meanRRI, SDNN (standard deviation of normal-to-normal), LF (low frequency), HF (high frequency) powers, LH/HF] and the reliability of LF and HF powers were investigated by frequency, time-frequency and intraclass correlation coefficient (ICC) analyses...
September 26, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28937016/impact-of-usage-of-personal-music-systems-on-oto-acoustic-emissions-among-medical-students
#15
Prasanth G Narahari, Jayashree Bhat, Arivudai Nambi, Anshul Arora
BACKGROUND: Intact hearing is essential for medical students and physicians for communicating with patients and appreciating internal sounds with a stethoscope. With the increased use of (PMSs), they are exposed to high sound levels and are at a risk of developing hearing loss. The effect of long term personal music system (PMS) usage on auditory sensitivity has been well established. Our study has reported the immediate and short term effect of PMS usage on hearing especially among medical professionals...
September 2017: Noise & Health
https://www.readbyqxmd.com/read/28930184/use-of-wavelet-transform-to-detect-compensated-and-decompensated-stages-in-the-congestive-heart-failure-patient
#16
Pratibha Sharma, Kimberly Newman, Carlin S Long, A J Gasiewski, Frank Barnes
This research work is aimed at improving health care, reducing cost, and the occurrence of emergency hospitalization in patients with Congestive Heart Failure (CHF) by analyzing heart and lung sounds to distinguish between the compensated and decompensated states. Compensated state defines stable state of the patient but with lack of retention of fluids in lungs, whereas decompensated state leads to unstable state of the patient with lots of fluid retention in the lungs, where the patient needs medication. Acoustic signals from the heart and the lung were analyzed using wavelet transforms to measure changes in the CHF patient's status from the decompensated to compensated and vice versa...
September 20, 2017: Biosensors
https://www.readbyqxmd.com/read/28916326/are-wireless-electronic-stethoscopes-useful-for-respiratory-rate-monitoring-during-intravenous-sedation
#17
Keiko Morimoto, Yukako Tsutsui, Shin Ogura, Katsuhisa Sunda
PURPOSE: Wireless stethoscopes can measure respiratory rate noninvasively and continuously, but there are no reports of their use during dental treatment. This study evaluated the usefulness of wireless stethoscopes during dental procedures requiring intravenous sedation (IVS). MATERIALS AND METHODS: This study was a prospective cohort study. The study sample consisted of dental patients who received IVS by propofol or midazolam administration at the Nippon Dental University Hospital (Tokyo, Japan)...
August 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28883927/listening-panel-agreement-and-characteristics-of-lung-sounds-digitally-recorded-from-children-aged-1-59-months-enrolled-in-the-pneumonia-etiology-research-for-child-health-perch-case-control-study
#18
Eric D McCollum, Daniel E Park, Nora L Watson, W Chris Buck, Charatdao Bunthi, Akash Devendra, Bernard E Ebruke, Mounya Elhilali, Dimitra Emmanouilidou, Anthony J Garcia-Prats, Leah Githinji, Lokman Hossain, Shabir A Madhi, David P Moore, Justin Mulindwa, Dan Olson, Juliet O Awori, Warunee P Vandepitte, Charl Verwey, James E West, Maria D Knoll, Katherine L O'Brien, Daniel R Feikin, Laura L Hammit
INTRODUCTION: Paediatric lung sound recordings can be systematically assessed, but methodological feasibility and validity is unknown, especially from developing countries. We examined the performance of acoustically interpreting recorded paediatric lung sounds and compared sound characteristics between cases and controls. METHODS: Pneumonia Etiology Research for Child Health staff in six African and Asian sites recorded lung sounds with a digital stethoscope in cases and controls...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28880397/transcranial-doppler-a-stethoscope-for-the-brain-neurocritical-care-use
#19
REVIEW
Chiara Robba, Danilo Cardim, Mypinder Sekhon, Karol Budohoski, Marek Czosnyka
Transcranial Doppler (TCD) ultrasonography is a noninvasive bedside monitoring technique that can evaluate cerebral blood flow hemodynamics in the intracranial arterial vasculature. TCD allows assessment of linear cerebral blood flow velocity, with a high temporal resolution and is inexpensive, reproducible, and portable. The aim of this review is to provide an overview of the most commonly used TCD derived signals and measurements used commonly in neurocritical care. We describe both basic (flow velocity, pulsatility index) and advanced concepts, including critical closing pressure, wall tension, autoregulation, noninvasive intracranial pressure, brain compliance, and cerebrovascular time constant; we also describe the clinical applications of TCD to highlight their utility in the diagnosis and monitoring of cerebrovascular diseases as the "stethoscope for the brain...
September 7, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28821520/preclinical-medical-students-understandings-of-academic-and-medical-professionalism-visual-analysis-of-mind-maps
#20
Janusz Janczukowicz, Charlotte E Rees
INTRODUCTION: Several studies have begun to explore medical students' understandings of professionalism generally and medical professionalism specifically. Despite espoused relationships between academic (AP) and medical professionalism (MP), previous research has not yet investigated students' conceptualisations of AP and MP and the relationships between the two. OBJECTIVES: The current study, based on innovative visual analysis of mind maps, therefore aims to contribute to the developing literature on how professionalism is understood...
August 18, 2017: BMJ Open
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