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(Chest. 1966;50:142-149.)
© 1966 American College of Chest Physicians

The Effect of Position and Thoracotomy on the Pressure Required to Inflate Each Lung

Antonio A. Garzon M.D.1; Stanley Lichtenstein B.S.1; and Karl E. Karlson M.D.1

1 Department of Surgery, State University of New York Downstate Medical Center and Kings County Hospital Center

1. With the use of a bronchospirometry catheter, the effect of position and thoracotomy upon the pressure-volume relationships of each lung was studied in 12 patients.

2. Lateral position and thoracotomy decreased the pressure required to expand the uppermost lung. During thoracotomy, it required as much as three times more pressure to inflate the dependent lung as to inflate the dependent lung as to inflate the upper lung.

3. The difference in compliance between the two lungs during thoracotomy serves to decrease ventilation to the dependent lung and decreases the ventilation-perfusion ratio of the dependent lung.






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Copyright © 1966 by the American College of Chest Physicians.