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The Annals of Thoracic Surgery, Vol 26, 126-132, Copyright © 1978 by The Society of Thoracic Surgeons
RW Sewell, JG Fewel, FL Grover and KV Arom
Reexpansion pulmonary edema following pneumothorax is clinically uncommon
but occasionally life threatening. This study documents the functional and
anatomical abnormalities that occur when a collapsed lung is reexpanded.
Right pneumothorax was created through open tube thoracostomy in 30 goats.
The animals were divided into six groups by duration of pneumothorax (24,
48, or 72 hours) and technique of reexpansion (waterseal vs 10 cm H2O
suction). Arterial blood gases and alveolar-arterial oxygen tension
difference (A-aDO2) were analyzed before pneumothorax and after
reexpansion. Each lung was reexpanded for 2 hours, chest roentgenograms
were obtained, and both lungs were removed. The left lung served as the
control. Both lungs were checked for surfactant activity and pulmonary
extravascular water volume (PEWY). Light and electron microscopy were also
performed. Anatomical and functional changes were present in the reexpanded
lung after relief of pneumothorax. Both increased time of collapse and
suction reexpansion tended to correlate with increased PEWV, decreased
surfactant and arterial PO2, and increased A-aDO2.
ARTICLES
Experimental evaluation of reexpansion pulmonary edema
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