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Animal model of unilateral ventilator-induced lung injury. | LitMetric

Animal model of unilateral ventilator-induced lung injury.

Intensive Care Med

Unitat de Biofisica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona-IDIBAPS, Spain.

Published: March 2005

AI Article Synopsis

Article Abstract

Objective: To design, implement, and test a selective lung ventilator for setting a rat model of unilateral ventilator-induced lung injury (VILI).

Design And Setting: Interventional animal study in a university laboratory for animal research.

Subjects: Anesthetized and paralyzed male Wistar rats.

Interventions: A selective ventilator designed to apply varying tidal volume, PEEP, and breathing gas to each lung of the rat was implemented and evaluated. Five control animals were ventilated at 7 ml/kg (3.5 ml/kg each lung). Unilateral VILI was induced in six animals subjected to selective ventilation (3.5 ml/kg in one lung and 15 ml/kg in the other lung). After 3 h of ventilation the animals were killed and the lungs excised.

Measurements And Results: Lung edema was assessed by means of the ratio between wet and dry lung weights. No significant differences were found in lungs of control animals (5.16+/-0.22 and 4.96+/-0.25), but the W/D ratio in the over ventilated lung (8.98+/-3.80) was significantly greater than that in the normally ventilated lung (4.76+/-0.15), indicating selective induction of lung edema by over stretch.

Conclusions: This selective ventilator can be implemented into a rat model of unilateral VILI to gain further insight into the mechanisms of pulmonary injury induced by different ventilatory strategies.

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Source
http://dx.doi.org/10.1007/s00134-004-2534-8DOI Listing

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