Snore site discrimination using statistical moments of free field snoring sounds recorded during sleep nasendoscopy.

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：:Multiple frequency bio-electrical impedance analysis (MFBIA) may be useful for monitoring fluid balance in newborn infants or to provide early prediction of the outcome following perinatal asphyxia. A reference range of data is needed for identification of babies with abnormal impedance values. This was a cross-sectio...

journal_title：Physiological measurement

authors： Healy GN,Lingwood BE

更新日期：2006-11-01 00:00:00

abstract：:Focused impedance measurements (FIM) are used in several fields, and address the problem of measuring the volume impedance of an object within a volume conductor. Several electrode configurations are possible, and these have different properties. Sensitivity fields of four configurations have been investigated. We pre...

journal_title：Physiological measurement

authors： Pettersen FJ,Ferdous H,Kalvøy H,Martinsen ØG,Høgetveit JO

更新日期：2014-06-01 00:00:00

abstract：:Using a primary coil that induces eddy currents in a volume conductor, and a pair of secondary coils configured to form a differential transformer, it is possible to measure the conductivity of a volume conductor by the magnetic fields of the induced eddy currents. This method is especially favourable for measuring im...

journal_title：Physiological measurement

authors： Netz J,Forner E,Haagemann S

更新日期：1993-11-01 00:00:00

abstract：:An analytic solution of the potential distribution on a 2D homogeneous disk for electrical impedance tomography under the complete electrode model is expressed via an infinite system of linear equations. For the shunt electrode model with two electrodes, our solution coincides with the previously derived solution expr...

journal_title：Physiological measurement

authors： Demidenko E

更新日期：2011-09-01 00:00:00

abstract：:The assessment and diagnosis of lower limb peripheral arterial occlusive disease (PAOD) is important since it can lead progressively to disabling claudication, ischaemic rest pain and gangrene. Historically, the first assessment has been palpation of the peripheral pulse since it can become damped, delayed and diminis...

journal_title：Physiological measurement

authors： Allen J,Oates CP,Lees TA,Murray A

更新日期：2005-10-01 00:00:00

abstract：OBJECTIVE:Predictive analytics monitoring that informs clinicians of the risk for failed extubation would help minimize both the duration of mechanical ventilation and the risk of emergency re-intubation in ICU patients. We hypothesized that dynamic monitoring of cardiorespiratory data, vital signs, and lab test result...

journal_title：Physiological measurement

authors： Keim-Malpass J,Enfield KB,Calland JF,Lake DE,Clark MT

更新日期：2018-07-16 00:00:00

abstract：:In this paper a description is given of the development, characterisation and first results of a thermal imaging device aimed at significantly reducing the incidence of diabetic foot ulceration (DFU). These devices will be used in three clinical centres and in two preliminary clinical trials. The first will be on heal...

journal_title：Physiological measurement

authors： Machin G,Whittam A,Ainarkar S,Allen J,Bevans J,Edmonds M,Kluwe B,Macdonald A,Petrova N,Plassmann P,Ring F,Rogers L,Simpson R

更新日期：2017-03-01 00:00:00

abstract：:The aim of this study was to analyse the feasibility of long-term measurements of cerebral (crSO2) and peripheral (prSO2) regional tissue oxygen saturation on the first day of life by determining the amount of artefacts and their influence on rSO2. Near infrared spectroscopy (NIRS) measurements were performed fronto-p...

journal_title：Physiological measurement

authors： Schmitz J,Pichler G,Schwaberger B,Urlesberger B,Baik N,Binder C

更新日期：2014-07-01 00:00:00

abstract：:There has been a surge of interest in using electrical impedance tomography (EIT) for monitoring regional lung ventilation, however, EIT is an ill-conditioned problem, and errors/noise in the boundary voltages can have an undesirable effect on the quality of the final image. Most EIT systems in clinical usage use seri...

journal_title：Physiological measurement

authors： Yerworth R,Bayford R

更新日期：2013-06-01 00:00:00

abstract：:Analysis of human eye pupil reactivity is a very valuable diagnostic method used mainly for evaluation of the condition of the autonomic nervous system and the visual system. The paper presents an experimental pupillometer built in the Institute of Physics of the Wroclaw University of Technology. The apparatus makes i...

journal_title：Physiological measurement

authors： Hachol A,Szczepanowska-Nowak W,Kasprzak H,Zawojska I,Dudzinski A,Kinasz R,Wygledowska-Promienska D

更新日期：2007-01-01 00:00:00

abstract：:Measurement of intracranial pressure (ICP) can be invaluable in the management of critically ill patients. Cerebrospinal fluid is produced by the choroid plexus in the brain ventricles (a set of communicating chambers), after which it circulates through the different ventricles and exits into the subarachnoid space ar...

journal_title：Physiological measurement

authors： Zhang X,Medow JE,Iskandar BJ,Wang F,Shokoueinejad M,Koueik J,Webster JG

更新日期：2017-07-24 00:00:00

abstract：:Tetrapolar linear arrays are commonly used in geophysics to explore the vertical distribution of resistivity values in a geological section of a specific point on the earth. This technique, known as vertical electric sounding (VES), uses different electrode configurations. For our experiments, we utilized its more pop...

journal_title：Physiological measurement

authors： Gonzalez CA,offniga O,Padilla LE

更新日期：1997-02-01 00:00:00

abstract：OBJECTIVE:In this study, electroencephalography activity recorded during monotonous driving was investigated to examine the predictive capability of monopolar EEG analysis for fatigue/sleepiness in a cohort of train drivers. APPROACH:Sixty-three train drivers participated in the study, where 32- lead monopolar EEG dat...

journal_title：Physiological measurement

authors： Lees T,Chalmers T,Burton D,Zilberg E,Penzel T,Lal S,Lal S

更新日期：2018-10-30 00:00:00

abstract：:In magnetic resonance electrical impedance tomography (MREIT) we inject currents through electrodes placed on the surface of a subject and try to reconstruct cross-sectional resistivity (or conductivity) images using internal magnetic flux density as well as boundary voltage measurements. In this paper we present a st...

journal_title：Physiological measurement

authors： Lee BI,Oh SH,Woo EJ,Lee SY,Cho MH,Kwon O,Seo JK,Baek WS

更新日期：2003-05-01 00:00:00

abstract：OBJECTIVE:Characteristic impedance (Zc) is an important component in the theory of hemodynamics. It is a commonly used metric of proximal arterial stiffness and pulse wave velocity. Calculated using simultaneously measured dynamic pressure and flow data, estimates of characteristic impedance can be obtained using metho...

journal_title：Physiological measurement

authors： Qureshi MU,Colebank MJ,Schreier DA,Tabima DM,Haider MA,Chesler NC,Olufsen MS

更新日期：2018-01-31 00:00:00

abstract：:External defibrillation requires the application of high voltage electrical impulses via large external electrodes, placed on selected locations on the thorax surface. The position of the electrodes is one of the major determinants of the transthoracic impedance (TTI) which influences the intracardiac current flow dur...

journal_title：Physiological measurement

authors： Krasteva V,Matveev M,Mudrov N,Prokopova R

更新日期：2006-10-01 00:00:00

abstract：:Extension of the frequency range of electrical impedance myography (EIM) to 2 MHz discloses a major rise in the reactance of muscle above 3-500 kHz, together with a slow decrease in the resistance consonant with the Kramers-Kronig relations. This 'upturn' phenomenon is found when the distant current electrode configur...

journal_title：Physiological measurement

authors： Shiffman CA,Kashuri H,Aaron R

更新日期：2008-06-01 00:00:00

abstract：:Direct digital acquisition of images using a scanning laser ophthalmoscope (SLO) offers several advantages over the conventional fundus camera; in particular, the ability to produce tomographic images using a confocal aperture. This note describes measurements of the performance of an SLO. Spatial resolution, measured...

journal_title：Physiological measurement

authors： Manivannan A,Sharp PF,Forrester JV

更新日期：1994-08-01 00:00:00

abstract：:Nasal obstruction is common and may disturb well-being during daytime and sleep. Its objective assessment by standard methods requires patient cooperation and inconvenient instrumentation. Therefore, the purpose of this study was to develop a novel, unobtrusive technique for continuous monitoring of changes in nasal c...

journal_title：Physiological measurement

authors： Thurnheer R,Bloch KE

更新日期：2004-04-01 00:00:00

abstract：:Linear methods of reconstruction play an important role in medical electrical impedance tomography (EIT) and there is a wide variety of algorithms based on several assumptions. With the Graz consensus reconstruction algorithm for EIT (GREIT), a novel linear reconstruction algorithm as well as a standardized framework ...

journal_title：Physiological measurement

authors： Antink CH,Pikkemaat R,Malmivuo J,Leonhardt S

更新日期：2015-06-01 00:00:00

abstract：:The outflow conductance (C(out)) of the cerebrospinal fluid (CSF) system is a parameter considered to be predictive in selection for hydrocephalus surgery. C(out) can be determined through an infusion test. A new apparatus for performing infusion tests in a standardized and automated way was developed. The objective w...

journal_title：Physiological measurement

authors： Andersson N,Malm J,Bäcklund T,Eklund A

更新日期：2005-12-01 00:00:00

abstract：:In nine healthy subjects, magnetic resonance imaging was used to measure blood flow waveforms in the common (CCA), internal (ICA) and external (ECA) carotid arteries. Useful data were acquired from 14 carotid arteries in total. Flow rates were determined from regions of interest placed over the arteries in CINE-phase ...

journal_title：Physiological measurement

authors： Marshall I,Papathanasopoulou P,Wartolowska K

更新日期：2004-06-01 00:00:00

abstract：:The use of artificial neural networks (ANNs) to interpret sleep monitoring signals is described. Recordings from ten infants with apparent life threatening episodes were assigned into training feedforward R-PROP networks. In order to separate good signal from artefact, 60 second time frames of SaO2 and TcPO2 signals w...

journal_title：Physiological measurement

authors： Taktak AF,Simpson S,Patel S,Meyer G

更新日期：2000-08-01 00:00:00

abstract：:Easily applicable and inexpensive water-specific techniques to evaluate local oedema, swollen tissue problems and fluid retention in humans are not available. In the present investigation a recently constructed non-invasive device for a local measurement of changes in tissue water in human skin and subcutaneous fat (S...

journal_title：Physiological measurement

authors： Nuutinen J,Ikäheimo R,Lahtinen T

更新日期：2004-04-01 00:00:00

abstract：OBJECTIVE:Though the mutual influence of cardiovascular and respiratory rhythms in healthy newborns has been documented, its full characterization is still pending. In general, the activity of many physiological subsystems has a well-expressed rhythmic character, and often an interdependency between physiological rhyth...

journal_title：Physiological measurement

authors： Lucchini M,Pini N,Fifer WP,Burtchen N,Signorini MG

更新日期：2018-06-19 00:00:00

abstract：:Active locomotion of wireless capsule endoscopes has the potential to improve the diagnostic yield of this painless technique for the diagnosis of gastrointestinal tract disease. In order to design effective locomotion mechanisms, a quantitative measure of the propelling force required to effectively move a capsule in...

journal_title：Physiological measurement

authors： Natali CD,Beccani M,Obstein KL,Valdastri P

更新日期：2014-07-01 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：:A new algorithm for classifying ECG recording quality based on the detection of commonly observed ECG contaminants which often render the ECG unusable for diagnostic purposes was evaluated. Contaminants (baseline drift, flat line, QRS-artefact, spurious spikes, amplitude stepwise changes, noise) were detected on indiv...

journal_title：Physiological measurement

authors： Di Marco LY,Duan W,Bojarnejad M,Zheng D,King S,Murray A,Langley P

更新日期：2012-09-01 00:00:00

abstract：:We present an adaptive algorithm for solving the inverse problem in electrical impedance tomography. To strike a balance between the accuracy of the reconstructed images and the computational efficiency of the forward and inverse solvers, we propose to combine an adaptive mesh refinement technique with the adaptive Ka...

journal_title：Physiological measurement

authors： Li T,Isaacson D,Newell JC,Saulnier GJ

更新日期：2014-06-01 00:00:00