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https://www.readbyqxmd.com/read/28227711/detection-of-fetal-kicks-using-body-worn-accelerometers-during-pregnancy-trade-offs-between-sensors-number-and-positioning
#1
Marco Altini, Patrick Mullan, Michiel Rooijakkers, Stefan Gradl, Julien Penders, Nele Geusens, Lars Grieten, Bjoern Eskofier, Marco Altini, Patrick Mullan, Michiel Rooijakkers, Stefan Gradl, Julien Penders, Nele Geusens, Lars Grieten, Bjoern Eskofier, Julien Penders, Michiel Rooijakkers, Nele Geusens, Stefan Gradl, Patrick Mullan, Lars Grieten, Bjoern Eskofier, Marco Altini
Monitoring fetal wellbeing is key in modern obstetrics. While fetal movement is routinely used as a proxy to fetal wellbeing, accurate, noninvasive, long-term monitoring of fetal movement is challenging. A few accelerometer-based systems have been developed in the past few years, to tackle common issues in ultrasound measurement and enable remote, self-administrated monitoring of fetal movement during pregnancy. However, many questions remain unanswered to date on the optimal setup in terms of body-worn accelerometers as well as signal processing and machine learning techniques used to detect fetal movement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227615/smart-monitoring-of-fluid-intake-and-bladder-voiding-using-pressure-sensitive-mats
#2
Madison Cohen-McFarlane, James R Green, Frank Knoefel, Rafik Goubran, Madison Cohen-McFarlane, James R Green, Frank Knoefel, Rafik Goubran, Frank Knoefel, Madison Cohen-McFarlane, Rafik Goubran, James R Green
Pressure sensitive mats have been used in noninvasive smart monitoring for a variety of problems including breathing rate monitoring, sleep monitoring, mobility, and weight. This paper describes a proof of concept application of pressure mats to monitor fluid intake/output (fluid cycle) events during the night. The ability to more accurately track such events has potential implications for monitoring those individuals who have nocturia, a condition where a person wakes at night to urinate. Data were collected from a healthy young female subject instructed to drink as much water as was comfortable (700mL) and lie in a supine position on a mattress located directly on three pressure mats...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227580/non-invasive-bcg-monitoring-for-non-traditional-settings
#3
Esteban J Pino, Constanza Larsen, Javier Chavez, Pablo Aqueveque, Esteban J Pino, Constanza Larsen, Javier Chavez, Pablo Aqueveque, Javier Chavez, Constanza Larsen, Pablo Aqueveque, Esteban J Pino
This paper presents the results from actual measurements of cardiac activity acquired through the use of noninvasive sensors to detect Ballistocardiogram (BCG). The results show that it is feasible to unobtrusively monitor heart rate in non-standard settings such as waiting rooms or at school using simple chairs fitted with capacitive sensors. The selected sensors, based on electromechanical principles, are able to measure BCG from a variety of subjects. We present the results for 114 participants from homes, school and a hospital waiting room, adding up over 815 minutes of data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227449/comparison-of-methods-for-the-evaluation-of-nibp-from-pulse-transit-time
#4
L Peter, N Noury, M Cerny, I Nykl, L Peter, N Noury, M Cerny, I Nykl, L Peter, I Nykl, N Noury, M Cerny
Non-invasive blood pressure measurement (NIBP) is one of the most discussed topic in cardiovascular medicine. Currently continuous measurement of blood pressure is possible by invasive methods, which makes the measurement impractical for Doctors and uncomfortable for the patients. It is possible to use special devices to measure blood pressure noninvasively continuously but there are still some problems with long time monitoring and comfort for patient. Physiologically there is connection between electrical and mechanical heart functions, propagation of pulse wave and blood pressure value...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227448/a-pulse-transit-time-based-fusion-method-for-the-noninvasive-and-continuous-monitoring-of-respiratory-rate
#5
Xiao-Rong Ding, Yuan-Ting Zhang, Hon Ki Tsang, Walter Karlen, Xiao-Rong Ding, Yuan-Ting Zhang, Hon Ki Tsang, Walter Karlen, Hon Ki Tsang, Walter Karlen, Yuan-Ting Zhang, Xiao-Rong Ding
The purpose of this study was to investigate whether pulse transit time (PTT) can be used for continuous monitoring of respiratory rate (RR). We derived PTT from the electrocardiogram and photoplethysmogram obtained from 42 recordings of CapnoBase, a publicly available benchmark data set for validating respiratory related measurements. The number of breaths in a minute (RR#) was estimated from the heart rate interval (HRI), pulse rate interval (PRI), and from PTT. In addition, to improve the estimation reliability, we investigated a fusion of the three HRI, PRI and PTT derived estimations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227244/towards-development-of-a-mobile-rf-doppler-sensor-for-continuous-heart-rate-variability-and-blood-pressure-monitoring
#6
Insoo Kim, Yusuf A Bhagat, Insoo Kim, Yusuf A Bhagat, Insoo Kim, Yusuf A Bhagat
The standard in noninvasive blood pressure (BP) measurement is an inflatable cuff device based on the oscillometric method, which poses several practical challenges for continuous BP monitoring. Here, we present a novel ultra-wide band RF Doppler radar sensor for next-generation mobile interface for the purpose of characterizing fluid flow speeds, and for ultimately measuring cuffless blood flow in the human wrist. The system takes advantage of the 7.1~10.5 GHz ultra-wide band signals which can reduce transceiver complexity and power consumption overhead...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227242/noninvasive-and-continuous-blood-pressure-measurement-via-superficial-temporal-artery-tonometry
#7
Julia Canning, Kendall Helbert, Grigoriy Iashin, Jonathan Matthews, Jason Yang, Margaret K Delano, Charles G Sodini, Quan Zhang, Julia Canning, Kendall Helbert, Grigoriy Iashin, Jonathan Matthews, Jason Yang, Margaret K Delano, Charles G Sodini, Quan Zhang, Jason Yang, Margaret K Delano, Grigoriy Iashin, Jonathan Matthews, Charles G Sodini, Quan Zhang, Julia Canning, Kendall Helbert
The measurement of blood pressure is an important cardiovascular health assessment, yet the current set of methodologies is limited in resolution, repeatability, accuracy, simplicity, and safety. This paper presents the design and prototype implementation of a novel and easy-to-use medical device for noninvasive and continuous blood pressure monitoring through tonometry at the superficial temporal artery (STA). The device features a stable form factor inspired by over-ear headphones that adjusts easily from person to person using a combination prismatic and rotational joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227207/photoacoustic-imaging-based-temperature-monitoring-for-high-intensity-focused-ultrasound-therapy
#8
Xun Wu, Jean Lunsford Sanders, Douglas N Stephens, Omer Oralkan, Xun Wu, Jean Lunsford Sanders, Douglas N Stephens, Omer Oralkan, Douglas N Stephens, Jean Lunsford Sanders, Omer Oralkan, Xun Wu
Temperature monitoring during high-intensity focused ultrasound (HIFU) application is necessary to ensure effective therapy while minimizing thermal damage to adjacent tissue. In this study, we demonstrate a noninvasive approach for temperature measurement during HIFU therapy based on photoacoustic imaging (PAI). Because of the dependence of photoacoustic (PA) signal amplitude on temperature of the source tissue and the linearity of the PAI system, changes in temperature will cause changes in PA image intensity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227081/noninvasive-estimation-of-alveolar-pressure
#9
Francesco Vicario, Roberto Buizza, William A Truschel, Nicolas W Chbat, Francesco Vicario, Roberto Buizza, William A Truschel, Nicolas W Chbat, Francesco Vicario, Roberto Buizza, Nicolas W Chbat, William A Truschel
This paper presents an algorithm for noninvasive estimation of alveolar pressure in mechanically ventilated patients who are spontaneously breathing. Continual monitoring of alveolar pressure is desirable to prevent ventilator-induced lung injury and to assess the intrinsic positive end-expiratory pressure (PEEPi), which is a parameter of clinical relevance in respiratory care and difficult to measure noninvasively. The algorithm is based on a physiological model of the respiratory system and, as such, it also provides insight into the respiratory mechanics of the patient under mechanical ventilation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226991/noninvasive-health-condition-monitoring-device-for-workers-at-high-altitudes-conditions
#10
Pablo Aqueveque, Cristopher Gutierrez, Francisco Saavedra, Esteban J Pino, Pablo Aqueveque, Cristopher Gutierrez, Francisco Saavedra, Esteban J Pino, Cristopher Gutierrez, Francisco Saavedra, Pablo Aqueveque, Esteban J Pino
This work presents the design and implementation of a continuous monitoring device to control the health state of workers, for instance miners, at high altitudes. The extreme ambient conditions are harmful for peoples' health; therefore a continuous control of the workers' vital signs is necessary. The developed system includes physiological variables: electrocardiogram (ECG), respiratory activity and body temperature (BT), and ambient variables: ambient temperature (AT) and relative humidity (RH). The noninvasive sensors are incorporated in a t-shirt to deliver a functional device, and maximum comfort to the users...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226745/in-vivo-characterization-of-genetic-expression-of-virus-transduced-calcium-indicators-in-retinal-ganglion-cells-using-a-low-cost-funduscope
#11
Yao-Chuan Chang, Steven T Walston, Robert H Chow, James D Weiland, Yao-Chuan Chang, Steven T Walston, Robert H Chow, James D Weiland, Robert H Chow, Yao-Chuan Chang, Steven T Walston, James D Weiland
Virus-transduced calcium indicators are effective reporters of neural activity, offering the advantage of cell-specific labeling. To track the level of in vivo expression of genetically encoded calcium indicators (GECIs) in rodent retina, we developed a noninvasive imaging approach based on a custom-modified low-cost and simple fundus system that enabled us to monitor and characterize in vivo bright-field and fluorescence retinal image. The system clearly resolves individual retinal ganglion cells (RGCs) and axons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226610/data-driven-estimation-of-blood-pressure-using-photoplethysmographic-signals
#12
Shi Chao Gao, Peter Wittek, Li Zhao, Wen Jun Jiang, Shi Chao Gao, Peter Wittek, Li Zhao, Wen Jun Jiang, Shi Chao Gao, Peter Wittek, Li Zhao, Wen Jun Jiang
Noninvasive measurement of blood pressure by optical methods receives considerable interest, but the complexity of the measurement and the difficulty of adjusting parameters restrict applications. We develop a method for estimating the systolic and diastolic blood pressure using a single-point optical recording of a photoplethysmographic (PPG) signal. The estimation is data-driven, we use automated machine learning algorithms instead of mathematical models. Combining supervised learning with a discrete wavelet transform, the method is insensitive to minor irregularities in the PPG waveform, hence both pulse oximeters and smartphone cameras can record the signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226467/wearable-deep-body-thermometers-and-their-uses-in-continuous-monitoring-for-daily-healthcare
#13
Ming Huang, Toshiyo Tamura, Takumi Yoshimura, Tadahiro Tsuchikawa, Shigehiko Kanaya, Ming Huang, Toshiyo Tamura, Takumi Yoshimura, Tadahiro Tsuchikawa, Shigehiko Kanaya, Toshiyo Tamura, Takumi Yoshimura, Ming Huang, Shigehiko Kanaya, Tadahiro Tsuchikawa
This paper introduces noninvasive deep body thermometers suitable for continuous deep body temperature (DBT) measurement. On the basis of their features, they were used in DBT monitoring for daily healthcare. A thermometer based on the dual-heat-flux method (T_DHFM), and an aural canal thermistor (ACT), were used in two studies of daily healthcare. The medical device CoreTemp by Terumo, based on the zero-heat-flux method, was also used for a DBT reference. The first study focused on preventing heat stroke in a high-temperature and high-humidity environment, while the other focused on the temperature monitoring of patients with spinal cord injuries...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226234/zooming-in-on-plant-hormone-analysis-tissue-and-cell-specific-approaches
#14
Ondřej Novák, Richard Napier, Karin Ljung
Plant hormones are a group of naturally occurring, low-abundance organic compounds that influence physiological processes in plants. Our knowledge of the distribution profiles of phytohormones in plant organs, tissues, and cells is still incomplete, but advances in mass spectrometry have enabled significant advances in tissue- and cell-type-specific analyses of phytohormones over the last decade. Mass spectrometry is able to simultaneously identify and quantify hormones and their related substances. Biosensors, on the other hand, offer continuous monitoring; can visualize local distributions and realtime quantification; and, in the case of genetically encoded biosensors, are noninvasive...
February 10, 2017: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/28221201/influence-of-fraction-of-inspired-oxygen-on-noninvasive-hemoglobin-measurement-parallel-assessment-of-2-monitors
#15
Etienne Gayat, Nicolas Imbert, Ariane Roujansky, Léa Lemasle, Marc Fischler
BACKGROUND: Previous reports have brought specific attention to the relationship between oxygenation of the patient and the accuracy of noninvasive measurement of hemoglobin (Hb) using an optical sensor. This study aimed to assess prospectively the relationship between fraction of inspired oxygen (FIO2) and the bias of the measurement of Hb by the use of 2 different noninvasive monitors compared with the classic invasive technique. METHODS: Forty-four patients were included prospectively...
February 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28220762/drug-detection-in-breath-non-invasive-assessment-of-illicit-or-pharmaceutical-drugs
#16
Phillip Trefz, Svend Kamysek, Patricia Fuchs, Pritam Sukul, Jochen Schubert, Wolfram Miekisch
Breath analysis not only holds great potential for the development of new non-invasive diagnostic methods, but also for the identification and follow up of drug levels in breath. This is of interest for both, forensic and medical science. On the one hand, the detection of drugs of abuse in exhaled breath - similar to the well-known breath alcohol tests - would be highly desirable as an alternative to blood or urine analysis in situations such as police controls for drugged driving. The noninvasive detection of drugs and their metabolites is thus of great interest in forensic science, especially since marijuana is becoming legalized in certain parts of the U...
February 21, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28219399/noninvasive-detection-of-alarming-intracranial-pressure-changes-by-auditory-monitoring-in-early-management-of-brain-injury-a-prospective-invasive-versus-noninvasive-study
#17
Fabrice Giraudet, François Longeras, Aurélien Mulliez, Aurélie Thalamy, Bruno Pereira, Paul Avan, Laurent Sakka
BACKGROUND: In brain-injured patients intracranial pressure (ICP) is monitored invasively by a ventricular or intraparenchymal transducer. The procedure requires specific expertise and exposes the patient to complications such as malposition, hemorrhage or infection. As inner-ear fluid compartments are connected to the cerebrospinal fluid space, ICP changes elicit subtle changes in the physiology of the inner ear. Notably, we previously demonstrated that the phase of cochlear microphonic potential (CM) generated by sound stimuli rotates with ICP...
February 21, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28218469/diagnostic-accuracy-of-reflectance-confocal-microscopy-using-vivascope-for-detecting-and-monitoring-skin-lesions-a-systematic-review
#18
S J Edwards, G Osei-Assibey, R Patalay, V Wakefield, C Karner
BACKGROUND: Skin cancer is one of the most common cancers in the UK. Patients with suspicious skin lesions are assessed clinically with/without dermoscopy, and lesions still considered suspicious are then surgically removed or have the diagnosis confirmed by a punch biopsy. AIM: To evaluate the diagnostic accuracy of the in vivo VivaScope(©) reflective confocal microscopy (RCM) system, a noninvasive technology designed to provide a more accurate presurgical diagnosis, leading to fewer biopsies of benign lesions, or to provide greater accuracy for lesion margins...
February 20, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28217434/gold-nanoparticle-based-platforms-for-circulating-cancer-marker-detection
#19
Xiaohua Huang, Ryan O'Connor, Elyahb Allie Kwizera
Detection of cancer-related circulating biomarkers in body fluids has become a cutting-edge technology that has the potential to noninvasively screen cancer, diagnose cancer at early stage, monitor tumor progression, and evaluate therapy responses. Traditional molecular and cellular detection methods are either insensitive for early cancer intervention or technically costly and complicated making them impractical for typical clinical settings. Due to their exceptional structural and functional properties that are not available from bulk materials or discrete molecules, nanotechnology is opening new horizons for low cost, rapid, highly sensitive, and highly specific detection of circulating cancer markers...
2017: Nanotheranostics (Syd)
https://www.readbyqxmd.com/read/28217052/topical-versus-caudal-ketamine-bupivacaine-combination-for-postoperative-analgesia-in-children-undergoing-inguinal-herniotomy
#20
Hala Saad Abdel-Ghaffar, Seham Mohamed Moeen, Ahmed Mohamed Moeen
BACKGROUND: Multiple studies claim that caudal administration of ketamine causes effective postoperative analgesia. The aim of this study was to assess the clinical effectiveness of ketamine after caudal or topical administration in pediatric patients undergoing inguinal herniotomy. PATIENTS AND METHODS: This randomized, comparative, double-blind study included eighty children (aged 6 months to 6 years) received either 1 ml/kg of 0.25% bupivacaine/ketamine 0.5 mg/kg for caudal analgesia (caudal group) or 0...
January 2017: Saudi Journal of Anaesthesia
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