A comb filter based signal processing method to effectively reduce motion artifacts from photoplethysmographic signals.

abstract：:Electrical impedance tomography (EIT) could be used as a portable non-invasive means to image the development of ischaemic stroke or haemorrhage. The purpose of this study was to examine if this was possible using time difference imaging, in the anesthetised rat using 40 spring-loaded scalp electrodes with applied con...

journal_title：Physiological measurement

authors： Dowrick T,Blochet C,Holder D

更新日期：2016-06-01 00:00:00

abstract：:Electrical impedance is one of the most often used parameters for characterizing material properties, especially in biomedical applications. Electrical impedance spectroscopy (EIS), used for revealing both resistive and capacitive characteristics, is good for use in tissue characterization. In this study, a portable a...

journal_title：Physiological measurement

authors： Huang YJ,Huang EY,Lu YY,Chen CY,Cheng KS

更新日期：2011-09-01 00:00:00

abstract：:Twenty-nine patients were monitored overnight for breathing distress patterns during postoperative analgesia. Nasal flow apnoea monitoring and pulse oximetry data were recorded at 50 Hz. Respiratory inductive plethysmography (RIP) tracked tidal volume (TV) thoracoabdominal motion, and supplemented the flow monitoring ...

journal_title：Physiological measurement

authors： Millard RK

更新日期：1999-05-01 00:00:00

abstract：:The objective of this study was to adapt a novel near-infrared diffuse correlation spectroscopy (DCS) flow-oximeter for simultaneous and continuous monitoring of relative changes in cerebral blood flow (rCBF) and cerebral oxygenation (i.e. oxygenated/deoxygenated/total hemoglobin concentration: Δ[HbO2]/Δ[Hb]/ΔTHC) dur...

journal_title：Physiological measurement

authors： Hou Y,Shang Y,Cheng R,Zhao Y,Qin Y,Kryscio R,Rayapati A,Hayes D,Yu G

更新日期：2014-10-01 00:00:00

abstract：UNLABELLED:The study created an 'ex vivo' model to test different algorithms for measurements of mucosal haemoglobin saturation with visible light spectrophotometry (VLS). The model allowed comparison between algorithms, but it also allowed comparison with co-oximetry using a 'gold standard' method. This has not been d...

journal_title：Physiological measurement

authors： Gade J,Greisen G

更新日期：2016-09-01 00:00:00

abstract：:Previous studies have proved that the baroreceptor reflex (baroreflex) control of heart rate can be used for stratification of post-infarction population and, in general, cardiovascular disease populations. Many methods have been proposed to estimate the so-called baroreflex sensitivity (BRS) expressed as ms mmhg-1. M...

journal_title：Physiological measurement

authors： Lavanga M,Baselli G,Fumagalli F,Ristagno G,Ferrario M

更新日期：2017-01-01 00:00:00

abstract：:EPR oximetry is a promising, relatively non-invasive method for monitoring the partial pressure of oxygen in tissue (PtO2) that has proved useful in following changes under various physiologic and pathophysiologic conditions. Optimal utilization of the method will be facilitated by systematic comparisons with other av...

journal_title：Physiological measurement

authors： O'Hara JA,Khan N,Hou H,Wilmo CM,Demidenko E,Dunn JF,Swartz HM

更新日期：2004-12-01 00:00:00

abstract：OBJECTIVE:Brain-computer interfaces (BCIs) are aimed at providing a new way of communication between the human brain and external devices. One of the major tasks associated with the BCI system is to improve classification performance of the motor imagery (MI) signal. Electroencephalogram (EEG) signals are widely used f...

journal_title：Physiological measurement

authors： Su J,Yang Z,Yan W,Sun W

更新日期：2020-08-11 00:00:00

abstract：:Cycling on an ergometer is one effective means of measuring cardiovascular function while applying stress on the heart. Bathing in a hot water bath applies a low stress to the heart. The electrocardiograms of a healthy adult male (aged 35 at the start of study) were recorded while taking a hot water bath with no elect...

journal_title：Physiological measurement

authors： Ishijima M,Togawa T

更新日期：1999-11-01 00:00:00

abstract：:We investigated the utility of ICA for evaluation of fetal rhythm in five uncomplicated twin pregnancies and in five twin pregnancies complicated by fetal arrhythmia. Using objective and subjective criteria, we sought to determine how the signal-to-noise ratio, signal fidelity and interference rejection are affected w...

journal_title：Physiological measurement

authors： Mensah-Brown NA,Lutter WJ,Comani S,Strasburger JF,Wakai RT

更新日期：2011-01-01 00:00:00

abstract：:A nonlinear model predictive controller has been developed to maintain normoglycemia in subjects with type 1 diabetes during fasting conditions such as during overnight fast. The controller employs a compartment model, which represents the glucoregulatory system and includes submodels representing absorption of subcut...

journal_title：Physiological measurement

authors： Hovorka R,Canonico V,Chassin LJ,Haueter U,Massi-Benedetti M,Orsini Federici M,Pieber TR,Schaller HC,Schaupp L,Vering T,Wilinska ME

更新日期：2004-08-01 00:00:00

abstract：:Vascular and clinical assessments of arterio-venous fistula (AVF) function and access are important in patients undergoing or preparing to undergo renal dialysis. Objective assessment techniques include colour duplex ultrasound and more recently medical infrared thermography. Ideally, these should help assess problems...

journal_title：Physiological measurement

authors： Allen J,Oates CP,Chishti AD,Ahmed IA,Talbot D,Murray A

更新日期：2006-01-01 00:00:00

abstract：:This paper investigates the main characteristics of the magneto-hemodynamic (MHD) response for application as a biomarker of vascular blood flow. The induced surface potential changes of a volunteer exposed to a 3 T static B0 field of a magnetic resonance imaging (MRI) magnet were measured over time at multiple locati...

journal_title：Physiological measurement

authors： Kyriakou A,Neufeld E,Szczerba D,Kainz W,Luechinger R,Kozerke S,McGregor R,Kuster N

更新日期：2012-02-01 00:00:00

abstract：:Urinary catheters (drainage tubes) are in widespread use. The most common type of long-term catheter is the Foley, which is made from natural or synthetic rubber. Foley catheters are passed into the bladder via the urethra or the suprapubic puncture channel (through the abdominal wall). A simulator for the abdominal w...

journal_title：Physiological measurement

authors： Coveney VA,Gröver D

更新日期：2001-08-01 00:00:00

abstract：:Plethysmographic measurement of airway resistance (R(aw)) has been determined by single-point analysis, usually at 50% of maximum inspiratory flow (MIF). Computer-assisted (best fit) analysis, however, allows R(aw) to be calculated by applying a regression line to any portion of the plethysmograph pressure-flow loop. ...

journal_title：Physiological measurement

authors： Thomas M,Greenough A,Blowes R,Rafferty GF,Calvert S,Marlow N,Peacock JL,Milner AD

更新日期：2002-05-01 00:00:00

abstract：OBJECTIVE:Using raw, sub-second-level accelerometry data, we propose and validate a method for identifying and characterizing walking in the free-living environment. We focus on sustained harmonic walking (SHW), which we define as walking for at least 10 s with low variability of step frequency. APPROACH:We utilize th...

journal_title：Physiological measurement

authors： Urbanek JK,Zipunnikov V,Harris T,Fadel W,Glynn N,Koster A,Caserotti P,Crainiceanu C,Harezlak J

更新日期：2018-02-28 00:00:00

abstract：:Unstable gait is a risk factor for falls. Wearable accelerometers enable remote monitoring of daily walking. Here, new methods for measuring stride-to-stride oscillations are validated against optical motion capture, normative data determined, and dependency on walking speed investigated. Walks by 13 young people (mea...

journal_title：Physiological measurement

authors： Brodie MA,Beijer TR,Canning CG,Lord SR

更新日期：2015-05-01 00:00:00

abstract：:Electrical impedance tomography (EIT) has shown significant promise for lung imaging. One key challenge for EIT in this application is the movement of electrodes during breathing, which introduces artefacts in reconstructed images. Various approaches have been proposed to compensate for electrode movement, but no comp...

journal_title：Physiological measurement

authors： Biguri A,Grychtol B,Adler A,Soleimani M

更新日期：2015-06-01 00:00:00

abstract：:Non-invasive in vivo neutron activation analysis (NAA) was used to measure the fluorine concentration in 35 people in Hamilton, Ontario, Canada. Measurement and precision data of this second generation NAA system were determined in 2013, and the results were compared with the performance of a first generation system u...

journal_title：Physiological measurement

authors： Mostafaei F,McNeill FE,Chettle DR,Wainman BC,Pidruczny AE,Prestwich WV

更新日期：2015-03-01 00:00:00

abstract：:In this phenomenological study we focus on dynamic measurements of volatile organic compounds (VOCs) in exhaled breath under exercise conditions. An experimental setup efficiently combining breath-by-breath analyses using proton transfer reaction mass spectrometry (PTR-MS) with data reflecting the behaviour of major h...

journal_title：Physiological measurement

authors： King J,Mochalski P,Kupferthaler A,Unterkofler K,Koc H,Filipiak W,Teschl S,Hinterhuber H,Amann A

更新日期：2010-09-01 00:00:00

abstract：:This paper describes a method of reducing the influence of the data error caused by non-ideal boundary shape and electrode placement on reconstructed images. A data calibration and a modified Newton-Raphson reconstruction are combined in the method to ensure rapid convergence and small reconstruction error. The method...

journal_title：Physiological measurement

authors： Li J

更新日期：1994-05-01 00:00:00

abstract：:Thermal sweating manikins are used to analyse the heat and mass transfer phenomena in the skin-clothing-environment system. However, the limiting factor of present thermal manikins is their inability to simulate adequately the human thermal behaviour, which has a significant effect on the clothing microenvironment. A ...

journal_title：Physiological measurement

authors： Psikuta A,Richards M,Fiala D

更新日期：2008-02-01 00:00:00

abstract：: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 ausculta...

journal_title：Physiological measurement

authors： Riknagel D,Dinesen B,Zimmermann H,Farlie R,Schmidt S,Toft E,Struijk JJ

更新日期：2016-07-01 00:00:00

abstract：:A multi-frequency electrical impedance tomography system for cardiopulmonary monitoring has been designed with specialized digital signal processors developed primarily for the telecommunications sector. The system consists of two modules: a scan-head and a base-station. The scan-head, located close to the patient's t...

journal_title：Physiological measurement

authors： Robitaille N,Guardo R,Maurice I,Hartinger AE,Gagnon H

更新日期：2009-06-01 00:00:00

abstract：:In this study, we designed and tested a new algorithm, which we call the 'restricted parabola', to identify the optimum atrioventricular (AV) delay in patients with biventricular pacemakers. This algorithm automatically restricts the hemodynamic data used for curve fitting to the parabolic zone in order to avoid inadv...

journal_title：Physiological measurement

authors： Dehbi HM,Jones S,Sohaib SM,Finegold JA,Siggers JH,Stegemann B,Whinnett ZI,Francis DP

更新日期：2015-09-01 00:00:00

abstract：OBJECTIVE:Doppler ultrasound (US) is the most commonly applied method to measure the fetal heart rate (fHR). When the fetal heart is not properly located within the ultrasonic beam, fHR measurements often fail. As a consequence, clinical staff need to reposition the US transducer on the maternal abdomen, which can be a...

journal_title：Physiological measurement

authors： Hamelmann P,Vullings R,Schmitt L,Kolen AF,Mischi M,van Laar JOEH,Bergmans JWM

更新日期：2017-09-21 00:00:00

abstract：OBJECTIVE:The creation of artificial gravity on board a space station is one of the promising methods for preventing health problems during space missions; a short-radius centrifuge (SRC) is the model of such a method on Earth. Our goal was to evaluate the sensitivity of bioimpedance polysegmental measurements for moni...

journal_title：Physiological measurement

authors： Takhtobina YV,Shchelykalina SP,Smirnov YI,Smirnov AV,Koloteva MI,Vassilieva GY,Nikolaev DV

更新日期：2020-05-07 00:00:00

abstract：:The ambulatory arterial stiffness index (AASI) is claimed to be a new estimator for arterial rigidity. It was recently defined as one minus the slope of the linear regression of systolic to diastolic ambulatory pressure during 24 h. Although several reports testify its clinical relevance, the explanation of how this n...

journal_title：Physiological measurement

authors： Craiem D,Graf S,Salvucci F,Chironi G,Megnien JL,Simon A,Armentano RL

更新日期：2010-07-01 00:00:00

abstract：:The main components responsible for the mechanical behavior of the arterial wall are collagen, elastin, and smooth muscle cells (SMCs) in the medial layer. We determined the structural and mechanical changes in porcine carotid arteries after administration of Triton® X-100, elastase, and collagenase using the inflatio...

journal_title：Physiological measurement

authors： Kochová P,Kuncová J,Svíglerová J,Cimrman R,Miklíková M,Liška V,Tonar Z

更新日期：2012-08-01 00:00:00

abstract：:Stroke is a major cause of disability within the western world. About 20% of strokes are a consequence of atheromatous narrowing of the origin of the internal carotid artery. Carotid endarterectomy has been shown to be an effective treatment for those with symptomatic and severe stenosis, provided the risk of death an...

journal_title：Physiological measurement

authors： Crossman J,Banister K,Bythell V,Bullock R,Chambers I,Mendelow AD

更新日期：2003-05-01 00:00:00