alexa Alveolar Stress, How to Measure? | OMICS International | Abstract
ISSN: 2161-105X

Journal of Pulmonary & Respiratory Medicine
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Short Communication

Alveolar Stress, How to Measure?

Erikson Custódio Alcântara1*, Wátila de Moura Sousa1, Carlos Oscar Paschetta2, Pablo Jorge Galíndez2 and Krislainy de Sousa Corrêa1

1Faculty of Medicine, Federal University of Goias, Professor at the Pontifical Catholic University of Goias/Santa Casa de Misericordia de Goiânia, Brasil

2Master in automatic control engineering and electronic engineering from the University of National Technology Cordoba, Argentina

*Corresponding Author:
Erikson Custódio Alcântara
Faculty of Medicine, Federal University of Goias
Professor at the Pontifical Catholic
University of Goias/Santa Casa de Misericordia de Goiânia, Brazil
Tel: 55-62-91663824
E-mail: [email protected]

Received date: January 20, 2015; Accepted date: July 15, 2015; Published date: July 20, 2015

Citation:Alcântara EC, Sousa WdM, Paschetta CO, Galíndez PJ, Corrêa KdS (2015) Alveolar Stress, How to Measure?. J Pulm Respir Med 5:273. doi:10.4172/2161-105X.1000273

Copyright: ©2015 Alcântara EC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The Alveolar Stress Index is an under explored tool, promising and may help to prevent the deleterious effects of mechanical ventilation. The aim of this study was to describe the importance of Alveolar Stress Index tool, as well as aspects in ventilatory support. This tool evaluates the pressure-volume loop, which, although measures the pulmonary mechanical stress, it does not consider the heterogeneity of the respiratory system. The Alveolar Stress Index, checked in screen monitor of mechanical ventilation equipments, facilitates the detection of alveolar collapse zones (alveolar stress index <0.9) or overdistension (alveolar stress index >1.1) of lung areas. If the index value indicates alveolar collapse (atelectrauma=pulmonary lesion caused by the cyclic opening and closing of alveolar units and distal airways), it is recommended to increase the PEEP (Positive end-expiratory pressure). On the other hand, if the value indicates alveolar distension (volutrauma=pulmonary lesion induced by high tidal volume, thus causing the distension of the lung parenchyma), the initial orientation is to decrease the tidal volume. It is worth mentioning that the intention of measuring alveolar stress index is not to replace other parameters, but to add it to patient monitoring, to the median and multicompartmental observation of the ventilated area, considering the heterogeneity of lung ventilation distribution, so that more tools are available to the professional, thus avoiding or hindering lung injuries, when under mechanical ventilation.

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