End-expiratory lung impedance change enables bedside monitoring of end-expiratory lung volume change

Hinz, J.; Hahn, G.; Neumann, Peter; Sydow, M.; Mohrenweiser, P.; Hellige, G.; Burchardi, H.

doi:10.1007/s00134-002-1555-4

Cited by 199 publications

(191 citation statements)

References 26 publications

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“…[8][9][10][11] Corley et al 8 used electrical lung impedance tomography to assess changes in lung volume. 28,29 They showed that HFNC was associated with an increase in end-expiratory lung volume and confirmed the generation of positive oropharyngeal pressure reported in earlier studies. Moreover, they reported a significant correlation between end-expiratory lung impedance and airway pressure and demonstrated that at least part of the improvement in oxygenation in subjects with acute hypoxemic respiratory failure was due to alveolar recruitment.…”

Section: P Ao2 /F Io2supporting

confidence: 78%

“…The difference between HFNC and CPAP was not significant (23 [18 -25] breaths/min versus 21 [21][22][23][24][25][26][27][28][29][30][31][32] breaths/min, P ϭ .9) (Fig. 2).…”

Section: Effects On Oxygenation and Ventilationmentioning

confidence: 99%

“…HFNC caused a significant reduction in median breathing frequency compared with the first non-rebreathing mask session (25 [21][22][23][24][25][26][27][28][29][30][31][32][33] breaths/min versus 23 [18 -25] breaths/min, P Ͻ .01). The difference between HFNC and CPAP was not significant (23 [18 -25] breaths/min versus 21 [21][22][23][24][25][26][27][28][29][30][31][32] breaths/min, P ϭ .9) (Fig.…”

Section: Effects On Oxygenation and Ventilationmentioning

confidence: 99%

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Physiologic Effects of High-Flow Nasal Cannula Oxygen in Critical Care Subjects

et al. 2015

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INTRODUCTION: High-flow nasal cannula (HFNC) can deliver heated and humidified gas (up to 100% oxygen) at a maximum flow of 60 L/min via nasal prongs or cannula. The aim of this study was to assess the short-term physiologic effects of HFNC. Inspiratory muscle effort, gas exchange, dyspnea score, and comfort were evaluated. METHODS: Twelve subjects admitted to the ICU for acute hypoxemic respiratory failure were prospectively included.

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Section: P Ao2 /F Io2supporting

confidence: 78%

“…The difference between HFNC and CPAP was not significant (23 [18 -25] breaths/min versus 21 [21][22][23][24][25][26][27][28][29][30][31][32] breaths/min, P ϭ .9) (Fig. 2).…”

Section: Effects On Oxygenation and Ventilationmentioning

confidence: 99%

Section: Effects On Oxygenation and Ventilationmentioning

confidence: 99%

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Physiologic Effects of High-Flow Nasal Cannula Oxygen in Critical Care Subjects

et al. 2015

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“…A good correlation has been previously demonstrated between changes in lung impedance measured by EIT and changes in lung volume, 30,[33][34][35][36][37] suggesting that the application of high-flow therapy could increase functional residual capacity. This finding was already reported in a recent study, 19 where HFNC significantly increased global EELI in a population of post-cardiac surgery patients with respiratory dysfunction.…”

Section: Discussionmentioning

confidence: 69%

“…[27][28][29] Interestingly, good correlations have been found between changes in end-expiratory lung impedance (EELI) and changes in end-expiratory lung volume (EELV), 30,31 which is equivalent to functional residual capacity in nonintubated subjects. Another important feature of EIT is the possibility of assessing regional changes of impedance.…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Flow Nasal Cannula and Body Position on End-Expiratory Lung Volume: A Cohort Study Using Electrical Impedance Tomography

et al. 2013

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BACKGROUND: Electrical impedance tomography measures changes in lung impedance, which are mainly related to changes in lung volume. We used electrical impedance tomography to investigate the effects of high-flow nasal cannula (HFNC) and body position on global and regional end-expiratory lung impedance variation (⌬EELI). METHODS: Prospective study with 20 healthy adults. Two periods were defined: the first in supine position and the second in prone position. Each period was divided into 3 phases. In the first and the third phases the subjects were breathing ambient air, and in the second HFNC was implemented. Four regions of interest were defined: 2 ventral and 2 dorsal. All men by nature desire to know.-Aristotle, Metaphysics

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Lung Function Tests in Neonates and Infants with Chronic Lung Disease: Global and Regional Ventilation Inhomogeneity

Pillow

Frerichs²,

Stocks³

2006

Pediatr. Pulmonol.

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This review considers measurement of global and regional ventilation inhomogeneity (VI) in infants and young children with acute neonatal respiratory disorders and chronic lung disease of infancy (CLDI). We focus primarily on multiple-breath inert gas washout (MBW) and electrical impedance tomography (EIT). The literature is critically reviewed and the relevant methods, equipment, and studies are summarized, including the limitations and strengths of individual techniques, together with the availability and appropriateness of any reference data. There has been a recent resurgence of interest in using MBW to monitor lung function within individuals and between different groups. In the mechanically ventilated, sedated, and paralyzed patient, VI indices can identify serial changes occurring following exogenous surfactant. Similarly, global VI indices appear to be increased in infants with CLDI and to differentiate between infants without lung disease and those with mild, moderate, and severe lung disease following preterm birth. While EIT is a relatively new technique, recent studies suggest that it is feasible in newborn infants, and can quantitatively identify changes in regional lung ventilation following alterations to ventilator settings, positive end expiratory pressure (PEEP), and administration of treatments such as surfactant. As such, EIT represents one of the more exciting prospects for continuous bedside pulmonary monitoring. For both techniques, there is an urgent need to establish guidelines regarding data collection, analysis, and interpretation in infants both with and without CLDI.

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End-expiratory lung impedance change enables bedside monitoring of end-expiratory lung volume change

Abstract: EIT is a simple bedside technique which enables monitor lung volume changes during ventilatory manoeuvres such as PEEP changes.

Cited by 199 publications

References 26 publications

Physiologic Effects of High-Flow Nasal Cannula Oxygen in Critical Care Subjects

Physiologic Effects of High-Flow Nasal Cannula Oxygen in Critical Care Subjects

Effect of High-Flow Nasal Cannula and Body Position on End-Expiratory Lung Volume: A Cohort Study Using Electrical Impedance Tomography

Lung Function Tests in Neonates and Infants with Chronic Lung Disease: Global and Regional Ventilation Inhomogeneity

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