Abstract Adequate pulmonary ventilation during anesthesia is essential for maximum protection of the patient during surgical operations. Allbritten, Haupt, and Amadeo1 have shown that a decrease in effective pulmonary ventilation frequently occurs during anesthesia and that a considerable increase in the minute volume of ventilation is required to provide a consistently adequate pulmonary ventilation. They also demonstrated that consistently adequate pulmonary ventilation could be provided without excessive airway pressure by assisting the deflation phase of respiration as well as the inflation phase during anesthesia. Adequacy of ventilation was directly related to ventilatory volume. As an outgrowth of this interest in the importance of the volume of pulmonary ventilation during anesthesia, this present study was conducted to show the relationship of lung volume to airway pressure both in the conscious patient and in the anesthetized patient undergoing surgical operation and to determine what factors influence this relationship. Rohrer and co-workers2 References 1. References 3 and 4. 2. Allbritten, F. F., Jr.; Haupt, G. J., and Amadeo, J. H.: The Change in Pulmonary Alveolar Ventilation Achieved by Aiding the Deflation Phase of Respiration During Anesthesia for Surgical Operations , Ann. Surg. 140:569-582 ( (Oct.) ) 1954.Crossref 3. Rohrer, F.; Nakasone, K., and Wirz, K.: Physiologie der Atembewgung , in Handbuch der normalen und pathologischen Physiologie , edited by H. Rosenberg, 1925, Vol. 2, pp. 7-127. 4. Rahn, H.; Otis, A. B.; Chadwick, L. E., and Fenn, W. O.: The Pressure-Volume Diagram of the Thorax and Lung , Am. J. Physiol. 146:161-178 ( (May) ) 1946. 5. Otis, A. B.; Rahn, H., and Fenn, W. O.: Venous Pressure Changes Associated with Positive Intra-Pulmonary Pressures: Their Relationship to the Distensibility of the Lung , Am. J. Physiol. 146:307-317 ( (May) ) 1946. 6. Nims, R. G.; Conner, E. H., and Comroe, J. H., Jr.: The Compliance of the Human Thorax in Anesthetized Patients , J. Clin. Invest. 34:744-750 ( (May) ) 1955.Crossref 7. Holaday, D. A., and Israel, J.: Alterations of the Work of Respiration During Anesthesia , Fed. Proc. 14:74-75 ( (March) ) 1955. 8. Ferris, B. G., Jr.; Mead, J.; Whittenberger, J. L., and Saxton, G. A., Jr.: Pulmonary Function in Convalescent Poliomyelitis Patients: Compliance of the Lungs and Thorax , New England J. Med. 247:390-393 ( (Sept. 11) ) 1952.Crossref 9. Nisell, O. I., and Dubois, A. B.: Relationship Between Compliance and FRC of the Lungs in Cats, and Measurement of Resistance to Breathing , Am. J. Physiol. 178:206-210 ( (Aug.) ) 1954.
A.M.A. Archives Surgery – American Medical Association
Published: Jun 1, 1956
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