CJA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Full Text (PDF)
Right arrow Submit a scholarly reply
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by TARHAN, S.
Right arrow Articles by LUNDBORG, R. O.
Right arrow Search for Related Content
PubMed
Right arrow Articles by TARHAN, S.
Right arrow Articles by LUNDBORG, R. O.

Canadian Journal of Anesthesia, Vol 17, 4-11, Copyright © 1970 by Canadian Anesthesiologists' Society

Effects of Increased Expiratory Pressure on Blood Gas Tensions and Pulmonary Shunting During Thoracotomy with use of the Carlens Catheter

SAIT TARHAN M.D.1 and RICHARD O. LUNDBORG M.D.1

1 Mayo Clinic and Mayo Foundation, Section of Anesthesiology, Rochester, Minnesota

Blood gases and acid-base status of fourteen patients undergoing thoracic surgery were studied. All patients were intubated with the Carlens catheter. A large degree of pulmonary shunting and corresponding hypoxaemia was often seen during collapse of one lung. Attempts to prevent the mediastinal shift and to reverse atelectasis in the dependent lung with increased expiratory pressurefurther decreased arterial oxygen tension in most patients. The mechanism involved in this adverse effect is most likely an increase of shunting through the collapsed non-dependent lung. However, effects of decreased cardiac output on these parameters cannot be excluded from the present study.

Increased expiratory pressure appears to reverse collapse of air spaces, but its effect on PaOO2 was not seen until after release of the pressure. This type of ventilation does not seem to be effective in correcting the hypoxaemia that may accompany the use of the Carlens catheter during thoracic surgery.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1970 by the Canadian Anesthesiologists' Society.