A practical approach to storage and retrieval of high-frequency physiological signals.

abstract：:Electrical impedance tomography (EIT) could be significantly advantageous to continuous monitoring of lung development in newborn and, in particular, preterm infants as it is non-invasive and safe to use within the intensive care unit. It has been demonstrated that accurate boundary form of the forward model is import...

journal_title：Physiological measurement

authors： Khor JM,Tizzard A,Demosthenous A,Bayford R

更新日期：2014-06-01 00:00:00

abstract：OBJECTIVE:Evoked tympanic membrane displacement (TMD) is a non-invasive technique for assessing intracranial pressure (ICP). The aim of this study was to define reference intervals (RIs) in the healthy population. APPROACH:Measurements were made in 154 healthy adults. Results were quantified by V m, which is the most ...

journal_title：Physiological measurement

authors： Campbell-Bell CM,Birch AA,Vignali D,Bulters D,Marchbanks RJ

更新日期：2018-01-31 00:00:00

abstract：:In this work, we describe a beat-by-beat method for assessing the clinical utility of pulsatile waveforms, primarily recorded from cardiovascular blood volume or pressure changes, concentrating on the photoplethysmogram (PPG). Physiological blood flow is nonstationary, with pulses changing in height, width and morphol...

journal_title：Physiological measurement

authors： Li Q,Clifford GD

更新日期：2012-09-01 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：:Non-contact heart and lung activity monitoring would be a desirable supplement to conventional monitoring techniques. Based on the potential of non-contact magnetic induction measurements, requirements for an adequate monitoring system were estimated. This formed the basis for the development of the presented extendab...

journal_title：Physiological measurement

authors： Steffen M,Heimann K,Bernstein N,Leonhardt S

更新日期：2008-06-01 00:00:00

abstract：:Electrical impedance tomography (EIT) is expected to become a valuable tool for monitoring mechanically ventilated patients due to its ability to continuously assess regional lung ventilation and aeration. Several sources of interference with EIT examinations exist in intensive care units (ICU). Our objectives are to ...

journal_title：Physiological measurement

authors： Frerichs I,Pulletz S,Elke G,Gawelczyk B,Frerichs A,Weiler N

更新日期：2011-12-01 00:00:00

abstract：:Objective assessment of stroke-patients' ability to control arm movements is vital for evidence-based therapy and progress monitoring. This study compares three different indices to quantify the quality of wrist movement during a task involving tracking a target on a screen. Each method is assessed in terms of agreeme...

journal_title：Physiological measurement

authors： Notley SV,Turk R,Pickering R,Simpson DM,Burridge JH

更新日期：2007-08-01 00:00:00

abstract：:A new image reconstruction algorithm is proposed to visualize static conductivity images of a subject in magnetic resonance electrical impedance tomography (MREIT). Injecting electrical current into the subject through surface electrodes, we can measure the induced internal magnetic flux density B = (Bx, By, Bz) using...

journal_title：Physiological measurement

authors： Park C,Park EJ,Woo EJ,Kwon O,Seo JK

更新日期：2004-02-01 00:00:00

abstract：:Electrical impedance tomography (EIT) has the potential to become a new tool for bedside monitoring of regional lung ventilation. The aim of our study was to assess the reproducibility of regional lung ventilation distribution determined by EIT during mechanical ventilation under identical ventilator settings. The exp...

journal_title：Physiological measurement

authors： Frerichs I,Schmitz G,Pulletz S,Schädler D,Zick G,Scholz J,Weiler N

更新日期：2007-07-01 00:00:00

abstract：:Balance is the ability to maintain equilibrium while sitting or standing. There are a number of different methods which are used to assess balance: technical methods such as sway magnetometry, ataxia meter and force platforms, and clinical methods such as the functional reach test, Berg balance test and fall risk inde...

journal_title：Physiological measurement

authors： Browne J,O'Hare N

更新日期：2000-11-01 00:00:00

abstract：:We used the finite element (FE) method to estimate the spatial sensitivity of a needle electrode for bioimpedance measurements. This current conducting needle with an insulated shaft was inserted in a saline solution and the current was measured at the neutral electrode. Model resistance and reactance were calculated ...

journal_title：Physiological measurement

authors： Høyum P,Kalvøy H,Martinsen ØG,Grimnes S

更新日期：2010-10-01 00:00:00

abstract：:The increasing use of EIT in clinical research on severely ill lung patients requires a clarification of the influence of pathologic impedance distributions on the validity of the resulting tomograms. Significant accumulation of low-conducting air (e.g. pneumothorax or emphysema) or well-conducting liquid (e.g. haemat...

journal_title：Physiological measurement

authors： Hahn G,Just A,Dudykevych T,Frerichs I,Hinz J,Quintel M,Hellige G

更新日期：2006-05-01 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：:Nasal obstruction disturbs comfort during daytime, and sleep quality. Convenient objective assessment of nasal ventilation would be desirable. Therefore, we developed a technique for unobtrusive monitoring of bilateral nasal airflow. Nasal cannulae with separated left- and right-sided tubings were connected to two pre...

journal_title：Physiological measurement

authors： Kohler M,Thurnheer R,Bloch KE

更新日期：2005-02-01 00:00:00

abstract：:This paper represents a reconstruction algorithm using a direct sensitivity matrix (DSM) approach for fast 3D image reconstruction in electrical impedance imaging. The boundary element method (BEM) is used in the construction of this matrix. The first images of a conductivity perturbation inside a sphere are reconstru...

journal_title：Physiological measurement

authors： Morucci JP,Granié M,Lei M,Chabert M,Marsili PM

更新日期：1995-08-01 00:00:00

abstract：:A magnetic pulse generator has been set up in order to study gastric activity. Two coils 1.05 m in diameter, arranged in a Helmholtz configuration, were used. The system generated magnetic field pulses higher than 15 mT, of duration 17.3+/-1.2 ms. Measurements were performed in 11 male volunteers, with average age 29....

journal_title：Physiological measurement

authors： Cordova-Fraga T,Bernal-Alvarado JJ,Gutierrez-Juarez G,Sosa M,Vargas-Luna M

更新日期：2004-10-01 00:00:00

abstract：:Cooperative sensors is a novel measurement architecture that allows the acquiring of biopotential signals on patients in a comfortable and easy-to-integrate manner. The novel sensors are defined as cooperative in the sense that at least two of them work in concert to measure a target physiological signal, such as a mu...

journal_title：Physiological measurement

authors： Rapin M,Proença M,Braun F,Meier C,Solà J,Ferrario D,Grossenbacher O,Porchet JA,Chételat O

更新日期：2015-04-01 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：:Previous studies demonstrate that it is possible to evaluate a heart graft rejection condition using a bioimpedance technique by means of an intracavitary catheter. We propose to use a less invasive technique consisting in the use of a transoesophageal catheter and two standard ECG electrodes on the thorax. The aim of...

journal_title：Physiological measurement

authors： Giovinazzo G,Ribas N,Cinca J,Rosell-Ferrer J

更新日期：2011-07-01 00:00:00

abstract：:Obesity is a major health issue in both developed and developing countries. The balance between energy intake and exercise is important, and measurements of both energy intake and energy expenditure are required. Many studies have attempted to monitor energy intake via wearable technology, but no standard methods have...

journal_title：Physiological measurement

authors： Tamura T

更新日期：2019-09-03 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：:The transthoracic electrical impedance is an important defibrillation parameter, affecting the defibrillating current amplitude and energy, and therefore the defibrillation efficiency. A close relationship between transthoracic impedance and defibrillation success rate was observed. Pre-shock measurements (using low a...

journal_title：Physiological measurement

authors： Al Hatib F,Trendafilova E,Daskalov I

更新日期：2000-02-01 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

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：:Fetal heart rate monitoring is used for pregnancy surveillance in obstetric units all over the world but in spite of recent advances in analysis methods, there are still inherent technical limitations that bound its contribution to the improvement of perinatal indicators. In this work, a previously published wavelet t...

journal_title：Physiological measurement

authors： Almeida R,Gonçalves H,Bernardes J,Rocha AP

更新日期：2014-08-01 00:00:00

abstract：:The purpose of this study was to examine the performance of dual-energy computed tomography (DECT) for the quantification of liver fat content (LFC). We prepared two phantoms: homogenized mixtures of porcine liver and fat and homogeneous mixtures of liver- and fat-equivalent solutions. Tubes containing mixtures with k...

journal_title：Physiological measurement

authors： Li JH,Tsai CY,Huang HM

更新日期：2014-04-01 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：: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：: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：OBJECTIVE:In this paper, a support vector machine (SVM) approach using statistical features, P wave absence, spectrum features, and length-adaptive entropy are presented to classify ECG rhythms as four types: normal rhythm, atrial fibrillation (AF), other rhythm, and too noisy to classify. APPROACH:The proposed algori...

journal_title：Physiological measurement

authors： Liu N,Sun M,Wang L,Zhou W,Dang H,Zhou X

更新日期：2018-06-25 00:00:00