Assessment of cerebrospinal fluid outflow conductance using constant-pressure infusion--a method with real time estimation of reliability.

abstract：:The purpose of this study was to examine the validity and reliability of estimated parameters of the work-time relationship during cross-country ski ergometry using the traditional multi-trial critical power (CP) test and a 3 min 'all-out' test (3MT). Fourteen recreationally active male participants (mean ± SD; age: 2...

journal_title：Physiological measurement

authors： Fukuda DH,Hetrick RP,Kendall KL,Smith-Ryan AE,Jackson ME,Stout JR

更新日期：2014-01-01 00:00:00

abstract：:Despite significant advances in adult clinical electrocardiography (ECG) signal processing techniques and the power of digital processors, the analysis of non-invasive foetal ECG (NI-FECG) is still in its infancy. The Physionet/Computing in Cardiology Challenge 2013 addresses some of these limitations by making a set ...

journal_title：Physiological measurement

authors： Behar J,Oster J,Clifford GD

更新日期：2014-08-01 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：:The heart rate responds dynamically to various intrinsic and environmental stimuli. The autonomic nervous system is said to play a major role in this response. Multifractal analysis offers a novel method to assess the response of cardiac interbeat intervals. Twenty-four hour ECG recordings of RR interbeat intervals (o...

journal_title：Physiological measurement

authors： Makowiec D,Rynkiewicz A,Wdowczyk-Szulc J,Zarczyńska-Buchowiecka M,Gałaska R,Kryszewski S

更新日期：2011-10-01 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：: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：: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：:Agitation is a significant problem in the intensive care unit (ICU), affecting 71% of sedated adult patients during 58% of ICU patient-days (Fraser and Riker 2001 NY Health-Syst. Pharm. 20 17-24). Subjective scale-based assessment methods are currently used to assess the level of patient agitation, but are limited in ...

journal_title：Physiological measurement

authors： Chase JG,Starfinger C,Lam Z,Agogue F,Shaw GM

更新日期：2004-08-01 00:00:00

abstract：:Electrical impedance tomography (EIT) measures the conductivity distribution within an object based on the current applied and voltage measured at surface electrodes. Thus, EIT images are sensitive to electrode properties (i.e. contact impedance, electrode area and boundary shape under the electrode). While some of th...

journal_title：Physiological measurement

authors： Boyle A,Adler A

更新日期：2011-07-01 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: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：:High-frequency (HF) oscillations in RR interval from 0.15-0.40 Hz are widely accepted as a measure of cardiac vagal outflow but the HF/RR relationship appears complex, particularly with longer RR intervals. The aim of this study was to evaluate the HF/RR interval relationship during free and paced breathing. HF power ...

journal_title：Physiological measurement

authors： Sandercock G,Gladwell V,Dawson S,Nunan D,Brodie D,Beneke R

更新日期：2008-07-01 00:00:00

abstract：:There is considerable interest in unobtrusive and portable methods of monitoring sleepiness outside the laboratory setting. This study evaluates the usefulness of combined electrocardiogram (ECG) and photoplethysmogram (PPG) measurements for estimating psychomotor vigilance. The psychomotor vigilance test (PVT) was pe...

journal_title：Physiological measurement

authors： Chua CP,McDarby G,Heneghan C

更新日期：2008-08-01 00:00:00

abstract：:In order to detect minute amounts of glucose in diluted urine, we applied the Raman spectroscopy method. To simulate abnormal diluted urine in a toilet bowl, we diluted normal urine ten-fold with water and added glucose up to 8 mg dl(-1). Data were collected using a low-resolution Raman spectrometer that was preproces...

journal_title：Physiological measurement

authors： Park C,Kim K,Choi J,Park K

更新日期：2007-05-01 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：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：:This paper discusses some important issues for the design of electrical impedance measurement systems intended for body fluid shift monitoring, in particular during dialysis treatments. We have studied two common signal generation systems: digital synthesis and carrier recovery. We have found that in prolonged measure...

journal_title：Physiological measurement

authors： Lozano A,Rosell J,Pallás-Areny R

更新日期：1995-11-01 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：: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 time-varying parametric spectrum estimation method for analysing non-stationary heart rate variability signals is presented. As a case study, the dynamics of heart rate variability during an orthostatic test is examined. In this method, the non-stationary signal is first modelled with a time-varying autoregressive m...

journal_title：Physiological measurement

authors： Tarvainen MP,Georgiadis SD,Ranta-Aho PO,Karjalainen PA

更新日期：2006-03-01 00:00:00

abstract：:Generalizability theory was used to investigate the score consistency of observed extracellular fluid/intracellular fluid (ECF/ICF) ratio measurements for both the global and leg-segmental bio-impedance spectroscopy methods. The test instrument used was a Xitron Hydra ECF/ICF Bio-Impedance Analyzer System, model 4200 ...

journal_title：Physiological measurement

authors： Turner AA,Lozano-Nieto A,Bouffard M

更新日期：2006-04-01 00:00:00

abstract：OBJECTIVE:The ratio of the partial pressure of arterial oxygen to fraction of inspired oxygen is a key component of the sequential organ failure assessment score that operationally defines sepsis. But, it is calculated infrequently due to the need for the acquisition of an arterial blood gas. So, we sought to find an o...

journal_title：Physiological measurement

authors： Gadrey SM,Lau CE,Clay R,Rhodes GT,Lake DE,Moore CC,Voss JD,Moorman JR

更新日期：2019-12-03 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：: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：: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：: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：:Using the cross-sectional images taken with the zoom-in micro-tomography technique, we measured trabecular thicknesses of femur bones in postmortem rats. Since the zoom-in micro-tomography technique is capable of high resolution imaging of a small local region inside a large subject, we were able to measure the trabec...

journal_title：Physiological measurement

authors： Cho MH,Chun IK,Lee SC,Cho MH,Lee SY

更新日期：2005-10-01 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：:Wearables such as accelerometers are emerging as powerful tools for quantifying gait in various environments. Flexibility in wearable location may improve ease of use and data acquisition during instrumented testing. However, change of location may impact algorithm functionality when evaluating associated gait charact...

journal_title：Physiological measurement

authors： Del Din S,Hickey A,Hurwitz N,Mathers JC,Rochester L,Godfrey A

更新日期：2016-10-01 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