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01-01-2012 | Experimental

Early detection of deteriorating ventilation by monitoring bilateral chest wall dynamics in the rabbit

Authors: Dan Waisman, Anna Faingersh, Carmit Levy, Eugene Konyukhov, Fatmi Ifat Colman Klotzman, Avi Rotschild, Amir Landesberg

Published in: Intensive Care Medicine | Issue 1/2012

Abstract

Purpose

Mechanical complications during assisted ventilation can evolve due to worsening lung disease or problems in airway management. These complications affect lung compliance or airway resistance, which in turn affect the chest wall dynamics. The objective of this study was to explore the utility of continuous monitoring of the symmetry and dynamics of chest wall motion in the early detection of complications during mechanical ventilation.

Methods

The local tidal displacement (TDi) values of each side of the chest and epigastrium were measured by three miniature motion sensors in 18 rabbits. The TDi responses to changes in peak inspiratory pressure (n = 7), induction of one-lung intubation (n = 7), and slowly progressing pneumothorax (PTX) (n = 6) were monitored in parallel with conventional respiratory (SpO₂, EtCO₂, pressure and flow) and hemodynamic (HR and BP) indices. PTX was induced by injecting air into the pleural space at a rate of 1 mL/min.

Results

A strong correlation (R ² = 0.99) with a slope close to unity (0.94) was observed between percent change in tidal volume and in TDi. One-lung ventilation was identified by conspicuous asymmetry development between left and right TDis. These indices provided significantly early detection of uneven ventilation during slowly developing PTX (within 12.9 ± 6.6 min of onset, p = 0.02) almost 1 h before the SpO₂ dropped (77.3 ± 27.4 min, p = 0.02). Decreases in TDi of the affected side paralleled the progression of PTX.

Conclusions

Monitoring the local TDi is a sensitive method for detecting changes in tidal volume and enables early detection of developing asymmetric ventilation.

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Title: Early detection of deteriorating ventilation by monitoring bilateral chest wall dynamics in the rabbit
Authors: Dan Waisman
Anna Faingersh
Carmit Levy
Eugene Konyukhov
Fatmi Ifat Colman Klotzman
Avi Rotschild
Amir Landesberg
Publication date: 01-01-2012
Publisher: Springer-Verlag
Published in: Intensive Care Medicine / Issue 1/2012
Print ISSN: 0342-4642
Electronic ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-011-2398-7

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Early detection of deteriorating ventilation by monitoring bilateral chest wall dynamics in the rabbit

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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