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Respiratory work in relation to cardiopulmonary bypass
  1. Cedric W. Deal,
  2. John J. Osborn,
  3. Eugene Louis,
  4. Stanley Elliott,
  5. Frank Gerbode
  1. Department of Cardiovascular Surgery, Presbyterian Medical Center, and the Institute of Medical Sciences, San Francisco, California 94115


    Twenty-four patients undergoing cardiopulmonary bypass have been studied and the work of respiration was measured (1) before the incision, (2) before bypass with the thorax open, (3) after bypass, and (4) after suturing of the incision. Our results indicate that moving the thoracic wall requires 10 to 14% of the respiratory work and that little change occurs as a consequence of cardiopulmonary bypass.

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    • 1 Aided in part by grants from U.S.P.H.S., HE5349 and HE06311, and Bay Area Research Committee