Joseph Huh, MD, Matthew Brenner, MD, John C

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Presentation transcript:

Changes In Pulmonary Physiology After Lung Volume Reduction Surgery In A Rabbit Model Of Emphysema Joseph Huh, MD, Matthew Brenner, MD, John C. Chen, MD, Benedict Yoong, BS, Adam Gassel, BS, Fernando Katie, MD, Jeffrey C. Milliken, MD, Robert McKenna, MD, Richard J. Fischel, MD, PhD, Arthur Gelb, MD, Archie F. Wilson, MD, PhD The Journal of Thoracic and Cardiovascular Surgery Volume 115, Issue 2, Pages 328-335 (February 1998) DOI: 10.1016/S0022-5223(98)70276-4 Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 1 Multibreath gas dilution lung volume measurement. Figure shows continuous helium gas concentration measured as digital signal intensity from a mass spectrometer. Helium concentration reaches a stable final concentration within four to five breaths, with no delayed mixing. FRC, Forced residual capacity; LVRS, lung volume reduction surgery. The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 2 Change in lung volume. Graph shows effect of increasing lung mass excision on percent change in forced residual capacity (FRC) from preoperative to postoperative measurement (r = 0.54, p = 0.047). LVRS, Lung volume reduction surgery. The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 3 Static compliance. Graphs shows lung compliance at baseline before induction of emphysema, preoperatively (4 weeks after induction of emphysema), and postoperatively (1 week after surgery). The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 4 Change in compliance. Graph shows effect of increasing lung mass excision on percent change in maximal airway pressure at 60 cc inflation from preoperative to postoperative measurement (r = 0.74, p = 0.0024). LVRS, Lung volume reduction surgery. The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 5 Flow-volume relationship. Graph shows dynamic flow-volume relationship at 33% and 66% of exhaled volume at baseline, preoperatively, and postoperatively. The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig. 6 A, Histologic findings in elastase-induced emphysema. Effect of 15,000 units of aerosolized elastase. Hematoxylin-eosin stain at 10× magnification. B, Histologic findings of normal rabbit lung. Hematoxylin-eosin stain at 10× magnification. The Journal of Thoracic and Cardiovascular Surgery 1998 115, 328-335DOI: (10.1016/S0022-5223(98)70276-4) Copyright © 1998 Mosby, Inc. Terms and Conditions