Reproducibility of regional lung ventilation distribution determined by electrical impedance tomography during mechanical ventilation.

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 experiments were performed on 10 anaesthetized supine pigs ventilated in a volume-controlled mode. EIT measurements were performed with the Goe-MF II device (Viasys Healthcare, Höchberg, Germany) during repeated changes in positive end-expiratory pressure (PEEP) from 0 to 10 cm H2O. Regional lung ventilation was determined in the right and left hemithorax as well as in 64 regions of interest evenly distributed over each chest side in the ventrodorsal direction. Ventilation distributions in both lungs were visualized as ventrodorsal ventilation profiles and shifts in ventilation distribution quantified in terms of centres of ventilation in relation to the chest diameter. The proportion of the right lung on total ventilation in the chest cross-section was 0.54+/-0.04 and remained unaffected by repetitive PEEP changes. Initial PEEP increase resulted in a redistribution of ventilation towards dorsal lung regions with a shift of the centre of ventilation from 45+/-3% to 49+/-3% of the chest diameter in the right and from 47+/-2% to 50+/-2% in the left hemithorax. Excellent reproducibility of the results in the individual regions of interest with almost identical patterns of ventilation distribution was found during repeated PEEP changes.

journal_name

Physiol Meas

authors

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

doi

10.1088/0967-3334/28/7/S19

subject

Has Abstract

pub_date

2007-07-01 00:00:00

pages

S261-7

issue

7

eissn

0967-3334

issn

1361-6579

pii

S0967-3334(07)36585-4

journal_volume

28

pub_type

杂志文章
  • Trabecular thickness measurement in cancellous bones: postmortem rat studies with the zoom-in micro-tomography technique.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/26/5/008

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

    更新日期:2005-10-01 00:00:00

  • Electrical biopsy of irradiated intestinal tissue with a simple electrical impedance spectroscopy system for radiation enteropathy in rats--a pilot study.

    abstract::Electrical impedance is one of the most often used parameters for characterizing material properties, especially in biomedical applications. Electrical impedance spectroscopy (EIS), used for revealing both resistive and capacitive characteristics, is good for use in tissue characterization. In this study, a portable a...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/32/9/010

    authors: Huang YJ,Huang EY,Lu YY,Chen CY,Cheng KS

    更新日期:2011-09-01 00:00:00

  • Imaging pathologic pulmonary air and fluid accumulation by functional and absolute EIT.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/27/5/S16

    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

  • A clinical distortion index for compressed echocardiogram evaluation: recommendations for Xvid codec.

    abstract::This paper introduces a new clinical distortion index able to measure the decrease in diagnostic content in compressed echocardiograms. It is calculated using cardiologists' answers to a clinical testbed composed of two types of tests: one blind and the other semi-blind. This index may be used to compare clinical perf...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/30/5/001

    authors: Alesanco A,Hernández C,Portolés A,Ramos L,Aured C,García M,Serrano P,García J

    更新日期:2009-05-01 00:00:00

  • The possible role of the vagal nervous system in the recovery of the blood pressure control after cardiac arrest: a porcine model study.

    abstract::Previous studies have proved that the baroreceptor reflex (baroreflex) control of heart rate can be used for stratification of post-infarction population and, in general, cardiovascular disease populations. Many methods have been proposed to estimate the so-called baroreflex sensitivity (BRS) expressed as ms mmhg-1. M...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/1361-6579/38/1/63

    authors: Lavanga M,Baselli G,Fumagalli F,Ristagno G,Ferrario M

    更新日期:2017-01-01 00:00:00

  • Comparison of blood volume pulse and skin conductance responses to mental and affective stimuli at different anatomical sites.

    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

    pub_type: 临床试验,杂志文章

    doi:10.1088/0967-3334/32/10/002

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

    更新日期:2011-10-01 00:00:00

  • Time-varying analysis of heart rate variability signals with a Kalman smoother algorithm.

    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

    pub_type: 临床试验,杂志文章

    doi:10.1088/0967-3334/27/3/002

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

    更新日期:2006-03-01 00:00:00

  • Measurement of pupil reactivity using fast pupillometry.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/28/1/006

    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

  • Choice of reconstructed tissue properties affects interpretation of lung EIT images.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/35/6/1035

    authors: Grychtol B,Adler A

    更新日期:2014-06-01 00:00:00

  • A comparison of methods for measurement of spatial resolution in two-dimensional circular EIT images.

    abstract::The literature concerning measurement of spatial resolution in electrical impedance tomography (EIT) is vague. Different groups often use their own method or a modified version of a better known method, thus hindering a generalized resolution measurement which could be useful for gauging the performance of one system ...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/23/1/316

    authors: Wheeler JL,Wang W,Tang M

    更新日期:2002-02-01 00:00:00

  • Validity of an activity monitor in young people with cerebral palsy gross motor function classification system level I.

    abstract::The activPAL™ activity monitor has potential for use in youth with Cerebral Palsy (CP) as it has demonstrated acceptable validity for the assessment of sedentary and physical activity in other populations. This study determined the validity of the activPAL™ activity monitor for the measurement of sitting, standing, wa...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/35/11/2307

    authors: O' Donoghue D,Kennedy N

    更新日期:2014-11-01 00:00:00

  • The independent components of auditory P300 and CNV evoked potentials derived from single-trial recordings.

    abstract::The back-projected independent components (BICs) of single-trial, auditory P300 and contingent negative variation (CNV) evoked potentials (EPs) were derived using independent component analysis (ICA) and cluster analysis. The method was tested in simulation including a study of the electric dipole equivalents of the s...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/28/8/001

    authors: Jervis B,Belal S,Camilleri K,Cassar T,Bigan C,Linden DE,Michalopoulos K,Zervakis M,Besleaga M,Fabri S,Muscat J

    更新日期:2007-08-01 00:00:00

  • Design considerations and performance of a prototype system for imaging neuronal depolarization in the brain using 'direct current' electrical resistance tomography.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/16/3a/009

    authors: Boone KG,Holder DS

    更新日期:1995-08-01 00:00:00

  • Monitoring of body fluid redistribution using segmental bioimpedance during rotation on a short-radius centrifuge.

    abstract:OBJECTIVE:The creation of artificial gravity on board a space station is one of the promising methods for preventing health problems during space missions; a short-radius centrifuge (SRC) is the model of such a method on Earth. Our goal was to evaluate the sensitivity of bioimpedance polysegmental measurements for moni...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/1361-6579/ab840b

    authors: Takhtobina YV,Shchelykalina SP,Smirnov YI,Smirnov AV,Koloteva MI,Vassilieva GY,Nikolaev DV

    更新日期:2020-05-07 00:00:00

  • Fetal motion estimation from noninvasive cardiac signal recordings.

    abstract::Fetal motility is a widely accepted indicator of the well-being of a fetus. In previous research, it has be shown that fetal motion (FM) is coherent with fetal heart rate accelerations and an indicator for active/rest cycles of the fetus. The most common approach for FM and fetal heart rate (FHR) assessment is by Dopp...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/37/11/2003

    authors: Biglari H,Sameni R

    更新日期:2016-11-01 00:00:00

  • Techniques for early detection of Alzheimer's disease using spontaneous EEG recordings.

    abstract::Alzheimer's disease (AD) is a degenerative disease which causes serious cognitive decline. Studies suggest that effective treatments for AD may be aided by the detection of the disease in its early stages, prior to extensive neuronal degeneration. In this paper, we propose a set of novel techniques which could help to...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/28/4/001

    authors: Woon WL,Cichocki A,Vialatte F,Musha T

    更新日期:2007-04-01 00:00:00

  • A comparative study of several exciting magnetic fields for induced current EIT.

    abstract::In this study, the selection of coil configuration parameters (coil radius and coil centre shift) for induced current EIT using circular coils is investigated. An alternative coil configuration is suggested, which produces approximately linear (spatially) magnetic fields in order to strengthen the currents in the cent...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/15/2a/007

    authors: Gençer NG,Ider YZ

    更新日期:1994-05-01 00:00:00

  • A measurement of pulmonary blood volume increase during systole in humans.

    abstract::Pulmonary blood volume increase during systole was measured in patients by analysing chest images obtained during ECG gated radionuclide angiography examination. The difference in the total radiation counts between systole and diastole in regions of interest, which included the lungs and the left ventricle, was measur...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章

    doi:10.1088/0967-3334/15/4/010

    authors: Nitzan M,Mahler Y,Schechter D,Yaffe S,Bocher M,Chisin R

    更新日期:1994-11-01 00:00:00

  • The effect of ambient air temperature on whole-body bioelectrical impedance.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/25/1/011

    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

  • A support vector machine approach for AF classification from a short single-lead ECG recording.

    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

    pub_type: 杂志文章

    doi:10.1088/1361-6579/aac7aa

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

    更新日期:2018-06-25 00:00:00

  • Decomposition method of an electrical bio-impedance signal into cardiac and respiratory components.

    abstract::The paper presents a method for adaptive decomposition of an electrical bio-impedance (BI) signal into two components: cardiac and respiratory. The decomposition of a BI signal is not a trivial process because of the non-stationarity of the signal components and overlapping of their harmonic spectra. An application sp...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/29/6/S02

    authors: Krivoshei A,Kukk V,Min M

    更新日期:2008-06-01 00:00:00

  • Feasibility of long-term cerebral and peripheral regional tissue oxygen saturation measurements.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/35/7/1349

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

    更新日期:2014-07-01 00:00:00

  • Simultaneous measurement of force and respiratory profiles during chest physiotherapy in ventilated children.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/28/9/004

    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

  • Life-threatening false alarm rejection in ICU: using the rule-based and multi-channel information fusion method.

    abstract::False alarm (FA) rates as high as 86% have been reported in intensive care unit monitors. High FA rates decrease quality of care by slowing staff response times while increasing patient burdens and stresses. In this study, we proposed a rule-based and multi-channel information fusion method for accurately classifying ...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/37/8/1298

    authors: Liu C,Zhao L,Tang H,Li Q,Wei S,Li J

    更新日期:2016-08-01 00:00:00

  • In vivo measurement of human skin absorption of topically applied substances by a photoacoustic technique.

    abstract::A photoacoustic technique is used for studying topically applied substance absorption in human skin. The proposed method utilizes a double-chamber PA cell. The absorption determination was obtained through the measurement of the thermal effusivity of the binary system substance-skin. The theoretical model assumes that...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/23/3/304

    authors: Gutiérrez-Juárez G,Vargas-Luna M,Córdova T,Varela JB,Bernal-Alvarado JJ,Sosa M

    更新日期:2002-08-01 00:00:00

  • Aging in autonomic control by multifractal studies of cardiac interbeat intervals in the VLF band.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/32/10/014

    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

  • Repeatability of body sway measurements; day-to-day variation measured by sway magnetometry.

    abstract::The postural stability of 30 normal subjects in the age range 15 to 64 years was measured on five separate occasions, using the sway magnetometry technique, to determine the day-to-day repeatability of this measurement technique. On each occasion the pathlength and area enclosed by movement of the hips in a horizontal...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/19/2/003

    authors: Elliott C,Murray A

    更新日期:1998-05-01 00:00:00

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

    abstract::A new method for the measurement of pulmonary gas exchange during inhalational anaesthesia is described which measures fresh gas and exhaust gas flows using carbon dioxide as an extractable marker gas. The theoretical precision of the method was compared by Monte Carlo modelling with other approaches which use marker ...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/0967-3334/25/1/001

    authors: Peyton PJ,Robinson GJ,Terry D,Junor PA

    更新日期:2004-02-01 00:00:00

  • Topographic distribution of idiopathic pulmonary fibrosis: a hybrid physics- and agent-based model.

    abstract:OBJECTIVE:Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal disease characterized by excessive deposition of collagen and associated stiffening of lung tissue. While it is known that inflammation and dysfunction of fibroblasts are involved in disease development, it remains poorly understood how cells and ...

    journal_title:Physiological measurement

    pub_type: 杂志文章

    doi:10.1088/1361-6579/aaca86

    authors: Wellman TJ,Mondoñedo JR,Davis GS,Bates JHT,Suki B

    更新日期:2018-06-28 00:00:00

  • Determination of Cole parameters in multiple frequency bioelectrical impedance analysis using only the measurement of impedances.

    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

    pub_type: 杂志文章

    doi:10.1088/0967-3334/27/9/007

    authors: Ward LC,Essex T,Cornish BH

    更新日期:2006-09-01 00:00:00