A new method for measurement of gas exchange during anaesthesia using an extractable marker gas.

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：OBJECTIVE:To validate the accuracy of the Oura ring in the quantification of resting heart rate (HR) and heart rate variability (HRV). BACKGROUND:Wearable devices have become comfortable, lightweight, and technologically advanced for assessing health behavior. As an example, the novel Oura ring integrates daily physic...

journal_title：Physiological measurement

authors： Kinnunen H,Rantanen A,Kenttä T,Koskimäki H

更新日期：2020-05-07 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：OBJECTIVE:Advanced neuroimaging has proved to be pivotal in the management of acute ischemic stroke. The use of CT perfusion (CTP) core and penumbra parameters to predict the outcome in wake-up stroke (WUS) patients in everyday clinical scenarios has not yet been investigated. The aim of our study was to investigate th...

journal_title：Physiological measurement

authors： Ajčević M,Furlanis G,Stella AB,Cillotto T,Caruso P,Ridolfi M,Lugnan C,Miladinović A,Ukmar M,Cova MA,Accardo A,Manganotti P,Naccarato M

更新日期：2020-08-11 00:00:00

abstract：:A method was developed for simultaneously measuring plasma resistance, cell interior resistance and cell membrane capacitance of blood. A three-element circuit model for simulating the impedance of blood was evaluated by comparing measured and calculated impedance frequency curves and was found feasible. The values of...

journal_title：Physiological measurement

authors： Zhao TX,Jacobson B,Ribbe T

更新日期：1993-05-01 00:00:00

abstract：:The most common method of clinical measurement of arterial blood pressure is by means of the cuff sphygmomanometer. This instrument has provided fundamental quantitative information on arterial pressure in individual subjects and in populations and facilitated estimation of cardiovascular risk related to levels of blo...

journal_title：Physiological measurement

authors： Avolio AP,Butlin M,Walsh A

更新日期：2010-01-01 00:00:00

abstract：:Near infrared spectroscopy (NIRS) is a widely employed method for assessment of regional cerebral oxygenation (RcStO2). RcStO2 values are expected to vary with changes in the relative amount of oxyhaemoglobin. The present experimental study aimed to assess the response of RcStO2 to controlled alterations of carotid bl...

journal_title：Physiological measurement

authors： Svenmarker S,Häggmark S,Johansson G,Axelsson B,Wiklund U,Haney M

更新日期：2014-07-01 00:00:00

abstract：:This paper describes an open loop feedback intelligent system for neonatal intensive care management. The system provides a tool enabling the user to make the final decision to accept or reject the advice given. The system collects 18 parameters from the bedside monitor and ventilator using a Medical Information Bus (...

journal_title：Physiological measurement

authors： Belal SY,Taktak AF,Nevill A,Spencer A

更新日期：2005-08-01 00:00:00

abstract：:Part I of this series showed that the five-element circuit model accurately mimics impedances measured using multi-frequency electrical impedance myography (MFEIM), focusing on changes brought on by disease. This paper addresses two requirements which must be met if the method is to qualify for clinical use. First, th...

journal_title：Physiological measurement

authors： Shiffman CA,Rutkove SB

更新日期：2013-02-01 00:00:00

abstract：:During voluntary contractions in humans, the subcutaneous tissues between surface electrodes and active motor units have been shown to attenuate surface electromyographic (EMG) signal amplitude. The purpose of this investigation was to examine the relationship between adipose tissue thickness and the electromechnical ...

journal_title：Physiological measurement

authors： Stock MS,Thompson BJ

更新日期：2016-03-01 00:00:00

abstract：:Vital signs monitoring is ubiquitous in clinical environments and emerging in home-based healthcare applications. Still, since current monitoring methods require uncomfortable sensors, respiration rate remains the least measured vital sign. In this paper, we propose a video-based respiration monitoring method that aut...

journal_title：Physiological measurement

authors： Janssen R,Wang W,Moço A,de Haan G

更新日期：2016-01-01 00:00:00

abstract：:The ability to image the impedance changes that accompany neuronal depolarization in the brain would constitute a major advance in neuroscience technology. Unfortunately, these changes are likely to be small and rapid and so difficult to measure. The impedance change at frequencies above 10 kHz, as used by conventiona...

journal_title：Physiological measurement

authors： Boone KG,Holder DS

更新日期：1995-08-01 00:00:00

abstract：:Measurements of blood volume pulse (BVP) and skin conductance are commonly used as indications of psychological arousal in affective computing and human-machine interfaces. To date, palmar surfaces remain the primary site for these measurements. Placement of sensors on palmar surfaces, however, is undesirable when rec...

journal_title：Physiological measurement

authors： Kushki A,Fairley J,Merja S,King G,Chau T

更新日期：2011-10-01 00:00:00

abstract：:Temporal variability of parameters which describe dynamic cerebral autoregulation (CA), usually quantified by the short-term relationship between arterial blood pressure (BP) and cerebral blood flow velocity (CBFV), could result from continuous adjustments in physiological regulatory mechanisms or could be the result ...

journal_title：Physiological measurement

authors： Panerai RB,Sammons EL,Smith SM,Rathbone WE,Bentley S,Potter JF,Samani NJ

更新日期：2008-04-01 00:00:00

abstract：:A study of the concentrations of the common breath metabolites ammonia, acetone, isoprene, ethanol and acetaldehyde in the breath of five subjects over a period of 30 days has been carried out. Breath samples were taken and analysed in the early morning on arrival at the laboratory. The real time analyses of three con...

journal_title：Physiological measurement

authors： Diskin AM,Spanel P,Smith D

更新日期：2003-02-01 00:00:00

abstract：:Conventional bioimpedance spectrometers measure resistance and reactance over a range of frequencies and, by application of a mathematical model for an equivalent circuit (the Cole model), estimate resistance at zero and infinite frequencies. Fitting of the experimental data to the model is accomplished by iterative, ...

journal_title：Physiological measurement

authors： Ward LC,Essex T,Cornish BH

更新日期：2006-09-01 00:00:00

abstract：:Electrical impedance tomography (EIT) estimates an image of change in electrical properties within a body from stimulations and measurements at surface electrodes. There is significant interest in EIT as a tool to monitor and guide ventilation therapy in mechanically ventilated patients. In lung EIT, the EIT inverse p...

journal_title：Physiological measurement

authors： Grychtol B,Adler A

更新日期：2014-06-01 00:00:00

abstract：:This review describes recent developments in microfabricated flow cytometers and related microfluidic devices that can detect, analyze, and sort cells or particles. The high-speed analytical capabilities of flow cytometry depend on the cooperative use of microfluidics, optics and electronics. Along with the improvemen...

journal_title：Physiological measurement

authors： Huh D,Gu W,Kamotani Y,Grotberg JB,Takayama S

更新日期：2005-06-01 00:00:00

abstract：:A photoplethysmographic (PPG) signal can provide very useful information about a subject's cardiovascular status. Motion artifacts (MAs), which usually deteriorate the waveform of a PPG signal, severely obstruct its applications in the clinical diagnosis and healthcare area. To reduce the MAs from a PPG signal, in the...

journal_title：Physiological measurement

authors： Peng F,Liu H,Wang W

更新日期：2015-10-01 00:00:00

abstract：:Several factors affect the viability of biosensor design. A computer-based model is being developed to enable the sources and effect of noise and variability within the sensor to be analysed. The work now presented details the modelling of the biochemical aspect of the biosensor model-the immunoassay. The equilibrium ...

journal_title：Physiological measurement

authors： Keating SM,Flanagan MT

更新日期：2001-08-01 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：:The goal of the present study was to develop and evaluate a new method for the prediction of unexplained syncope occurrences. Diagnosis of syncope is currently based on the reproduction of symptoms in combination with hypotension and bradycardia induced by a 45 min 60-70 degrees head-upright tilt test (HUTT). The main...

journal_title：Physiological measurement

authors： Schang D,Feuilloy M,Plantier G,Fortrat JO,Nicolas P

更新日期：2007-02-01 00:00:00

abstract：OBJECTIVE:Bioimpedance has been used to investigate changes in electrical parameters during ischemia in various tissues. The small intestine is a multi-layered structure, with several distinct tissue types, and ischemia related changes occur at different times in the different intestinal layers. When investigating how ...

journal_title：Physiological measurement

authors： Strand-Amundsen RJ,Reims HM,Tronstad C,Kalvøy H,Martinsen ØG,Høgetveit JO,Ruud TE,Tønnessen TI

更新日期：2017-05-01 00:00:00

abstract：:Spectral analysis of heart rate variability (HRV) is used for the assessment of cardiovascular autonomic control. In this study, a data-driven adaptive technique called empirical mode decomposition (EMD) and the associated Hilbert spectrum has been used to evaluate the effect of local anaesthesia on HRV parameters in ...

journal_title：Physiological measurement

authors： Shafqat K,Pal SK,Kumari S,Kyriacou PA

更新日期：2011-04-01 00:00:00

abstract：:A majority of geriatric patients experience difficulty in performing sit-to-stand (SiSt) transitions. A detailed assessment of SiSt ability is a prerequisite for successful rehabilitation. Body fixed sensors (BFSs) are increasingly used to assess functional performances. As to date there is no system which analyzes cl...

journal_title：Physiological measurement

authors： Schwenk M,Gogulla S,Englert S,Czempik A,Hauer K

更新日期：2012-11-01 00:00:00

abstract：:We tested the hypothesis that transmission of arterial pressure to brain tissue oxygenation is low under conditions of arterial pressure instability. Two experimental models of hemodynamic instability were used in healthy human volunteers; (1) oscillatory lower body negative pressure (OLBNP) (N = 8; 5 male, 3 female),...

journal_title：Physiological measurement

authors： Rickards CA,Sprick JD,Colby HB,Kay VL,Tzeng YC

更新日期：2015-04-01 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：:It has previously been shown that extreme changes in ambient air temperature can affect whole-body bioelectrical impedance. The purpose of this study was to determine if more moderate changes in ambient air temperature, such as those experienced in most laboratory settings, would also affect bioelectric impedance anal...

journal_title：Physiological measurement

authors： Buono MJ,Burke S,Endemann S,Graham H,Gressard C,Griswold L,Michalewicz B

更新日期：2004-02-01 00:00:00

abstract：:Skinfold anthropometry is a widely practiced technique often with little appreciation of its limitations. The large residual error appearing in any regressions of body density versus sums of skinfolds is primarily due to biological causes, in particular the non-constancy of the ratio of subcutaneous to total body fat....

journal_title：Physiological measurement

authors： Beddoe AH,Samat SB

更新日期：1998-08-01 00:00:00

abstract：:Impedance cardiography (ICG) has been proposed to estimate the stroke volume (SV) and cardiac output (CO) in various medical indications. The aim of this study was to explore the reliability of ICG during pregnancy with respect to SV and CO measurements. Blood pressure, heart rate and thoracic impedance were monitored...

journal_title：Physiological measurement

authors： Moertl MG,Schlembach D,Papousek I,Hinghofer-Szalkay H,Weiss EM,Lang U,Lackner HK

更新日期：2012-06-01 00:00:00