Accuracy of tidal volume, lung volume, and flow measurements by inductance vest in COPD patients

Hudgel, David W.; Capehart, M.; Johnson, B. D.; Hill, Paul; Robertson, D. G.

doi:10.1152/jappl.1984.56.6.1659

Cited by 28 publications

(10 citation statements)

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“…HUDGEL et al [17] demonstrated a similar agreement of flow traces from PTG and calibrated inductance vest in chronic obstructive pulmonary disease (COPD) patients. MAXWELL et al [18] used calibrated RIP to estimate lung volume changes during histamine-induced bronchoconstriction in recurrently wheezy infants.…”

Section: Discussionmentioning

confidence: 76%

Pressure sensor plethysmography: a method for assessment of respiratory motion in children

Bánovčin¹,

Seidenberg²,

Hardt³

1995

Eur Respir J

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P Pr re es ss su ur re e s se en ns so or r p pl le et th hy ys sm mo og gr ra ap ph hy y: : a a m me et th ho od d f fo or r a as ss se es ss sm me en nt t o of f r re es sp pi ir ra at to or ry y m mo ot ti io on n i in n c ch hi il ld dr re en n P. Banovcin*, J. Seidenberg**, H. von der Hardt** For this purpose, we used two pressure sensors attached to the skin above the umbilicus and in the right medioclavicular line at the fourth intercostal space: "pressure sensor plethysmography". We tested the ability of this method to assess thoracoabdominal asynchrony and TPEF/TE by comparison with respiratory inductance plethysmographic and pneumotachographic measurements in 30 children, aged 1-12 yrs, with airway obstruction.The mean difference (95% confidence interval (95% CI)) between phase angles obtained by respiratory inductance plethysmography and pressure sensor plethysmography was only -5.8°(range -18.0 to +6.4°). Similarly, all methods used to measure TPEF/TE agreed well: mean differences (95% CI) between pneumotachographic and respiratory inductance plethysmographic, pneumotachographic and pressure sensor plethysmographic, and respiratory inductance plethysmographic and pressure sensor plethysmographic measurements of TPEF/TE were +0.01 (range -0.05 to +0.06), -0.03 (-0.09 to +0.03) and -0.03 (-0.10 to +0.04), respectively.We conclude that pressure sensor plethysmography is a simple and noninvasive method, and suitable to measure thoracoabdominal asynchrony and TPEF/ TE ratios as well as respiratory inductance plethysmography and pneumotachography.

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Section: Discussionmentioning

confidence: 76%

Pressure sensor plethysmography: a method for assessment of respiratory motion in children

Bánovčin¹,

Seidenberg²,

Hardt³

1995

Eur Respir J

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“…In clinical pulmonary function tests, the specific manifestations of COPD p include decreased FEV1/FVC levels [28], as well as reduced expressions of MMEF and other ventilation indicators [29]. Diminished levels of basic and superimposed lung volume indicators, such as ERV, inspiratory reserve volume (IRV), and FRC, are also indicative of COPD [30]. Unlike clinical data, the pulmonary data collected from animal models are affected by existing instruments, and the indicators of different instruments may vary.…”

Section: Effect Of Incremental Smoke Exposure On Lung Function and Stmentioning

confidence: 99%

The rat model of COPD skeletal muscle dysfunction induced by progressive cigarette smoke exposure: a pilot study

et al. 2020

BMC Pulm Med

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Background: Chronic obstructive pulmonary disease (COPD) skeletal muscle dysfunction is a prevalent malady that significantly affects patients' prognosis and quality of life. Although the study of this disease has attracted considerable attention, a definite animal model is yet to be established. This study investigates whether smoke exposure could lead to the development of a COPD skeletal muscle dysfunction model in rats. Methods: Sprague Dawley rats were randomly divided into model (MG, n = 8) and control groups (CG, n = 6). The MG was exposed to cigarette smoke for 16 weeks while the CG was not. The body weight and forelimb grip strength of rats were monitored monthly. The pulmonary function and the strength of tibialis anterior muscle were assessed in vitro and compared after establishing the model. The histological changes in lung and gastrocnemius muscles were observed. The expressions of interleukin (IL)-6, IL-8, and tumor necrosis factor (TNF)-α were detected by ELISA, while the expressions of Atrogin-1 and MuRF1 in the gastrocnemius muscle were determined by Western blotting. Results: Smoke exposure slowly increases the body weight and forelimb grip strength of MG rats, compared to CG rats. However, it significantly decreases the pulmonary ventilation function and the skeletal muscle contractility of the MG in vitro. Histologically, the lung tissues of MG show typical pathological manifestations of emphysema, while the skeletal muscles present muscular atrophy. The expressions of IL-6, IL-8, and TNF-α in MG rats are significantly higher than those measured in CG rats. Increased levels of Atrogin-1 and MuRF1 were also detected in the gastrocnemius muscle tissue of MG. Conclusion: Progressive smoking exposure decreases the contractile function of skeletal muscles, leading to muscular atrophy. It also increases the expressions of inflammatory and muscle protein degradation factors in COPD rats. This indicates that smoke exposure could be used to establish a COPD skeletal muscle dysfunction model in rats.

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“…Lennox and coworkers (41) found that drift of an inductive plethysmography signal was only 22% of the drift arising from changes in temperature within a body plethysmograph. Other investigators (42)(43)(44) have also reported that drift of inductive plethysmography is small over short periods. Artifactual changes in volume related to drift were further minimized by relating changes in end-expiratory lung volume to a reference point within that same cycle of Cheyne-Stokes respiration, namely the lung volume during the preceding apnea.…”

Section: Methodologic Considerationsmentioning

confidence: 90%

Fluctuations in End-Expiratory Lung Volume during Cheyne-Stokes Respiration

Brack

Jubran

Laghi

et al. 2005

Am J Respir Crit Care Med

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We hypothesized that patients with Cheyne-Stokes respiration exhibit periodic increases in end-expiratory lung volume, mediated by changes in breath components, postinspiratory inspiratory muscle activity, or both. Calibrated inductive plethysmography revealed that 12 of 12 patients with Cheyne-Stokes respiration experienced increases in end-expiratory volume during hyperpnea: maximum 412 +/- 112 (SE) ml (range 75-1,543 ml). Compared with quiet breathing, the breath with largest increase in end-expiratory volume had larger tidal volume (867 +/- 107 vs. 567 +/- 38 ml, p < 0.01) and shorter expiratory time (1.25 +/- 0.11 vs. 1.66 +/- 0.15 seconds, p < 0.05). During decrescendo, the breath with largest decrease in end-expiratory volume had smaller tidal volume (p < 0.01) and longer expiratory time (p < 0.01). Cross-correlation of time series revealed that end-expiratory volume was related to both breath components (p < 0.0001). Bipolar needle electrodes revealed that scalene muscle activity at end-expiration was 50.7 +/- 14.0% higher at highest increase in lung volume than during preceding apnea (p < 0.05). Time series for scalene activity and end-expiratory volume were cross-correlated (p < 0.008). Increase in tonic scalene activity at end-expiration, however, was equivalent during crescendo and decrescendo phases: 50.6 +/- 22.1 versus 42.0 +/- 12.9% (p = 0.48). In conclusion, patients with Cheyne-Stokes respiration exhibit fluctuations in end-expiratory lung volume, primarily because of alterations in tidal volume and expiratory time rather than postinspiratory inspiratory muscle activity.

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Accuracy of tidal volume, lung volume, and flow measurements by inductance vest in COPD patients

Cited by 28 publications

References 0 publications

Pressure sensor plethysmography: a method for assessment of respiratory motion in children

Pressure sensor plethysmography: a method for assessment of respiratory motion in children

The rat model of COPD skeletal muscle dysfunction induced by progressive cigarette smoke exposure: a pilot study

Fluctuations in End-Expiratory Lung Volume during Cheyne-Stokes Respiration

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