Dynamic profiles of volatile organic compounds in exhaled breath as determined by a coupled PTR-MS/GC-MS study.

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：: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：: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：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：OBJECTIVE:This paper aims to report on the accuracy of estimating sleep stages using a wrist-worn device that measures movement using a 3D accelerometer and an optical pulse photoplethysmograph (PPG). APPROACH:Overnight recordings were obtained from 60 adult participants wearing these devices on their left and right w...

journal_title：Physiological measurement

authors： Beattie Z,Oyang Y,Statan A,Ghoreyshi A,Pantelopoulos A,Russell A,Heneghan C

更新日期：2017-10-31 00:00:00

abstract：:The electrocardiogram (ECG) is a well studied signal from which many clinically relevant parameters can be derived, such as heart rate. A key component in the estimation of these parameters is the accurate detection of the R peak in the QRS complex. While corruption of the ECG by movement artefact or sensor failure ca...

journal_title：Physiological measurement

authors： Johnson AE,Behar J,Andreotti F,Clifford GD,Oster J

更新日期：2015-08-01 00:00:00

abstract：:Although previous studies have established the feasibility of monitoring esophageal temperature during radiofrequency cardiac ablation using an esophageal temperature probe (ETP), some questions remain regarding its efficacy. The aims of this study were to study the effect of the location of the ETP on the temperature...

journal_title：Physiological measurement

authors： Rodríguez I,Lequerica JL,Berjano EJ,Herrero M,Hornero F

更新日期：2007-05-01 00:00:00

abstract：:Hand bone equivalent phantoms (250 ml) carrying selenium in various amounts were irradiated and counted for in vivo neutron activation analysis (IVNAA) by employing a 4π NaI(TI) based detection system. During the analysis of counting data, a feature at a higher energy than the gamma ray peak from (77m)Se (0.162 MeV) w...

journal_title：Physiological measurement

authors： Tahir SN,Chettle DR

更新日期：2015-12-01 00:00:00

abstract：OBJECTIVE:Accurate bladder size estimation is an important clinical parameter that assists physicians, enabling them to provide better treatment for patients who are suffering from urinary incontinence. Electrical impedance tomography (EIT) is a non-invasive medical imaging method that estimates organ boundaries assumi...

journal_title：Physiological measurement

authors： Konki SK,Khambampati AK,Sharma SK,Kim KY

更新日期：2020-12-18 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：OBJECTIVE:To investigate the effect of maternal hyperoxygenation on fetal heart rate (FHR) when applied for suspected fetal distress during the second stage of term labor. APPROACH:A single-center randomized controlled trial was conducted in a tertiary care hospital in The Netherlands. Participants were included durin...

journal_title：Physiological measurement

authors： Moors S,Joshi R,Bullens LM,van Oostrum NHM,Regis M,van den Heuvel ER,Oei SG,van Laar JOEH,van der Hout-van der Jagt MB

更新日期：2020-12-11 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 aim of our study was to check the effect of varying blood volume in the chest and gravity on the distribution of ventilation and aeration in the lungs. The change in intrathoracic blood volume was elicited by application of lower body negative pressure (LBNP) of -50 cmH2O. The variation of gravity in terms of hypo...

journal_title：Physiological measurement

authors： Frerichs I,Bodenstein M,Dudykevych T,Hinz J,Hahn G,Hellige G

更新日期：2005-04-01 00:00:00

abstract：:Cardiac output (CO) monitoring is not only essential for critically ill patients in the hospital, but also for patients at home and those undergoing cardiopulmonary exercise testing. However, CO is difficult to monitor during daily activities and exercise. In this paper, we aim at developing a novel CO estimation meth...

journal_title：Physiological measurement

authors： Wang L,Poon CC,Zhang YT

更新日期：2010-05-01 00:00:00

abstract：OBJECTIVE:In this research, we introduce a new methodology for atrial fibrillation (AF) diagnosis during sleep in a large population sample at risk of sleep-disordered breathing. APPROACH:The approach leverages digital biomarkers and recent advances in machine learning (ML) for mass AF diagnosis from overnight-hours o...

journal_title：Physiological measurement

authors： Chocron A,Efraim R,Mandel F,Rueschman M,Palmius N,Penzel T,Elbaz M,Behar JA

更新日期：2020-11-06 00:00:00

abstract：:There are currently no objective means of quantifying chest wall vibrations during manual physiotherapy. The aims of the study were to (i) develop a method to quantify physiotherapy-applied forces and simultaneous changes in respiratory flow and pressure, (ii) assess the feasibility of using this method in ventilated ...

journal_title：Physiological measurement

authors： Gregson RK,Stocks J,Petley GW,Shannon H,Warner JO,Jagannathan R,Main E

更新日期：2007-09-01 00:00:00

abstract：:This paper presents the design, construction and testing of a device to measure pressure-volume loops in the left ventricle of conscious, ambulatory rats. Pressure is measured with a standard sensor, but volume is derived from data collected from a tetrapolar electrode catheter using a novel admittance technique. Ther...

journal_title：Physiological measurement

authors： Raghavan K,Feldman MD,Porterfield JE,Larson ER,Jenkins JT,Escobedo D,Pearce JA,Valvano JW

更新日期：2011-06-01 00:00:00

abstract：OBJECTIVE:Sleep-stage scoring is important for sleep-quality evaluation and the diagnosis of related diseases. In this study, an automatic sleep-stage scoring method using photoplethysmographic (PPG) signals was proposed. APPROACH:To construct the classification model, we extracted 14 time-domain features, 17 frequenc...

journal_title：Physiological measurement

authors： Wu X,Yang J,Pan Y,Zhang X,Luo Y

更新日期：2020-06-30 00:00:00

abstract：OBJECTIVE:Physical activity has been shown to impact future health outcomes in adults, but little is known about the long-term impact of physical activity in toddlers. Accurately measuring the specific types and amounts of physical activity in toddlers will help us to understand, predict, and better affect their future...

journal_title：Physiological measurement

authors： Albert MV,Sugianto A,Nickele K,Zavos P,Sindu P,Ali M,Kwon S

更新日期：2020-03-06 00:00:00

abstract：OBJECTIVE:This paper aims to present how physiological signals can be processed based on wavelet decomposition to calculate multiple physiological parameters in real-time on an embedded platform. APPROACH:An ECG and PPG are decomposed to the appropriate scale based on a quadratic spline wavelet base in order to obtain...

journal_title：Physiological measurement

authors： Tang M,Xia P,He Z,Zhao Z,Chen X,Yang T,Zhang Z,Zhan Q,Li X,Fang Z

更新日期：2020-03-06 00:00:00

abstract：:Sedentary behaviour (SB) is associated with a number of adverse health outcomes. Studies that have used ActiGraph monitors to define sedentary time tend to use a threshold of  <100 counts per minute (cpm) for classifying SB; however, this cut-point was not empirically derived for adults. It is not known whether ActiGr...

journal_title：Physiological measurement

authors： Clarke-Cornwell AM,Farragher TM,Cook PA,Granat MH

更新日期：2016-10-01 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：:Two studies concerning multi-frequency impedance measurements are presented. The first uses tetrapolar measurements made on the thorax and the second electrical impedance tomography images, also made from the thorax. The way in which the impedance and the changes in impedance with ventilation depend upon frequency are...

journal_title：Physiological measurement

authors： Brown BH,Barber DC,Wang W,Lu L,Leathard AD,Smallwood RH,Hampshire AR,Mackay R,Hatzigalanis K

更新日期：1994-05-01 00:00:00

abstract：:Body surface potential maps recorded during catheter pace mapping can facilitate the localization of the site of origin of ventricular tachycardia. In this study, we investigated the value of a realistic computer model of the human ventricular myocardium in generating body surface potential maps as templates for ident...

journal_title：Physiological measurement

authors： Hren R,Horácek BM

更新日期：1997-11-01 00:00:00

abstract：:We used finite element analysis to study the relationship between the intraventricular blood conductance and the right ventricular volume. Previous studies reported a quasi-linear dependence between these two quantities. We quantified the effects of the resistivities of the surrounding tissues (e.g. heart wall, lungs)...

journal_title：Physiological measurement

authors： Panescu D,Webster JG,Stratbucker RA

更新日期：1994-02-01 00:00:00

abstract：OBJECTIVE:Eye-tracking devices have become widely used as clinical assessment tools in a variety of applied-scientific fields to measure saccadic eye movements. With the emergence of multiple static and dynamic devices, the concurrent need for algorithm development and validation is paramount. APPROACH:This review ass...

journal_title：Physiological measurement

authors： Stuart S,Hickey A,Vitorio R,Welman K,Foo S,Keen D,Godfrey A

更新日期：2019-02-26 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：: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：OBJECTIVE:To investigate if modern seismocardiography (SCG) and ballistocardiography (BCG) are useful in the detection of hemodynamic changes occurring during simulated obstructive apneic events. METHODS:Forty-seven healthy volunteers performed a voluntary maximum Mueller maneuver (MM) for 10 s, and SCG and BCG signal...

journal_title：Physiological measurement

authors： Morra S,Hossein A,Gorlier D,Rabineau J,Chaumont M,Migeotte PF,Van De Borne P

更新日期：2020-07-09 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