Whole-body plethysmography

Podlesch, I; Ulmer, W. T.

doi:10.1183/1025448x.00031002

Cited by 43 publications

(71 citation statements)

References 9 publications

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“…Body plethysmography with spirometry (MasterScreen Body, Erich Jaeger GmbH)17 provided information about flow and volume parameters, FEV 1 , FVC, FEV 1 /FVC, functional residual capacity (FRC), residual volume (RV), inspiratory capacity (IC) and total lung capacity (TLC), and resistance, including inspiratory resistance ( R in ) and expiratory resistance ( R ex ). Single-breath helium dilution carbon monoxide diffusion (MasterScreen Diffusion, Erich Jaeger GmbH)18–20 was performed to obtain diffusion capacity of the lung for carbon monoxide (D L,CO ), alveolar volume (VA), D L,CO /VA, RV, FRC and TLC.…”

Section: Methodsmentioning

confidence: 99%

Bronchodilator response of advanced lung function parameters depending on COPD severity

Jarenbäck

Eriksson

Peterson

et al. 2016

COPD

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BackgroundCOPD is defined as partly irreversible airflow obstruction. The response pattern of bronchodilators has not been followed in advanced lung function parameters.PurposeThe aim of this study was to investigate bronchodilator response pattern in advanced lung function parameters in a continuous fashion along forced expiratory volume in 1 second (FEV1) percent predicted (%p) in COPD patients and controls.Patients and methodsEighty-one smokers/ex-smokers (41 controls and 40 COPD) performed spirometry, body plethysmography, impulse oscillometry and single-breath helium dilution carbon monoxide diffusion at baseline, after salbutamol inhalation and then after an additional inhalation of ipratropium.ResultsMost pulmonary function parameters showed a linear increase in response to decreased FEV1%p. The subjects were divided into groups of FEV1%p <65 and >65, and the findings from continuous analysis were verified. The exceptions to this linear response were inspiratory capacity (IC), forced vital capacity (FVC), FEV1/FVC and expiratory resistance (Rex), which showed a segmented response relationship to FEV1%p. IC and FVC, with break points (BP) of 57 and 58 FEV1%p respectively, showed no response above, but an incresed slope below the BP. In addition, in patients with FEV1%p <65 and >65, response of FEV1%p did not correlate to response of volume parameters.ConclusionResponse of several advanced lung function parameters differs depending on patients’ baseline FEV1%p, and specifically response of volume parameters is most pronounced in COPD patients with FEV1%p <65. Volume and resistance responses do not follow the flow response measured with FEV1 and may thus be used as a complement to FEV1 reversibility to identify flow, volume and resistance responders.

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Section: Methodsmentioning

confidence: 99%

Bronchodilator response of advanced lung function parameters depending on COPD severity

Jarenbäck

Eriksson

Peterson

et al. 2016

COPD

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“…Since infants and young children are unable to follow the instruction for the spirometry test, it is inappropriate for them. On the other hand, whole-body plethysmography is a technique for measuring lung volume and pressure passively in the research settings, however, its use for infants has been limited for research purposes and not for clinical management of the patients [6].…”

Section: B Related Work: Non-invasive Respiration Monitoringmentioning

confidence: 99%

“…Using k 1 computed for the spontaneous session, airway resistance R can be calculated based on (6). Fig.…”

Section: Spontaneous Breathing Sessionmentioning

confidence: 99%

A passive quantitative measurement of airway resistance using depth data

Ostadabbas¹,

Bulach²,

Ku³

et al. 2014

2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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The Respiratory Syncytial Virus (RSV) is the most common cause of serious lower respiratory tract infections in infants and young children. RSV often causes increased airway resistance, clinically detected as wheezing by chest auscultation. In this disease, expiratory flows are significantly reduced due to the high resistance in patient's airway passages. A quantitative method for measuring resistance can have a great benefit to diagnosis and management of children with RSV infections as well as with other lung diseases. Airway resistance is defined as the lung pressure divided by the airflow. In this paper, we propose a method to quantify resistance through a simple, non-contact measurement of chest volume that can act as a surrogate measure of the lung pressure and volumetric airflow. We used depth data collected by a Microsoft Kinect camera for the measurement of the lung volume over time. In our experimentation, breathing through a number of plastic straws induced different airway resistances. For a standard spirometry test, our volume/flow estimation using Kinect showed strong correlation with the flow data collected by a commercially-available spirometer (five subjects, each performing 20 breathing trials, correlation coefficient = 0.88, with 95% confidence interval). As the number of straws decreased, emulating a higher airway obstruction, our algorithm was sufficient to distinguish between several levels of airway resistance.

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“…16 Body plethysmography with spirometry (MasterScreen Body, Erich Jaeger GmbH) 17 provided information about flow and volume parameters, FEV 1 , FVC, FEV 1 /FVC, functional residual capacity (FRC), residual volume (RV), inspiratory capacity (IC) and total lung capacity (TLC), and resistance, including inspiratory resistance (R in ) and expiratory resistance (R ex ). Single-breath helium dilution carbon monoxide diffusion (MasterScreen Diffusion, Erich Jaeger GmbH) [18][19][20] was performed to obtain diffusion capacity of the lung for carbon monoxide (D L,CO ), alveolar volume (VA), D L,CO /VA, RV, FRC and TLC.…”

Section: Methodsmentioning

confidence: 99%