Abstract
4/2005
vol. 1
SHORT COMMUNICATIONThe lung function in operated acquired mitral and aortic valve diseases without left ventricular failure – preliminary observations before operation
Arch Med Sci 2005; 1, 4: 254-257
Online publish date: 2005/12/22
Introduction: The study has been designed to evaluate the influence of the operations on cardio-pulmonary by-pass, particulary with systemic normothermia and cold crystalloid cardioplegia on the function of heart and lungs.
Material and methods: 27 non-smokers 21-78 year old, 16 with aortic, 11 mitral valve diseases, 22 in NYHA III, 5 – IV class, randomly chosen pursuing excluding criteria before operation.
Bodypletysmography, spirometry, and diffusing capacity were compared to the control group, and with American Thoracic Society (ATS) norms.
Results: Following patients\' data values were significantly worse: Vital Capacity (p<0.05) – sitting position, and in sitting and supine positions: Forced Vital Capacity (p<0.001), Alveollar Volume (VA, p<0.05), Hemoglobin standardized Lung Diffusing Capacity for Carbon monoxide (TLCOc; p<0.05), and body surface area standardized TLCOc (TLCOc/BSA; p<0.001), whereas TLCOc/VA – insignificantly. After changing the position from sitting to supine most changes are similar, but the patients lacked a fall in percent-normal Residual Volume (RV), unlike in RV % Total Lung Capacity.
Conclusions: Mild restrictive lung dysfunction is associated with acquired valve diseases before left ventricular failure develops, and respiratory adaptation to the supine position is almost unaffected.
Material and methods: 27 non-smokers 21-78 year old, 16 with aortic, 11 mitral valve diseases, 22 in NYHA III, 5 – IV class, randomly chosen pursuing excluding criteria before operation.
Bodypletysmography, spirometry, and diffusing capacity were compared to the control group, and with American Thoracic Society (ATS) norms.
Results: Following patients\' data values were significantly worse: Vital Capacity (p<0.05) – sitting position, and in sitting and supine positions: Forced Vital Capacity (p<0.001), Alveollar Volume (VA, p<0.05), Hemoglobin standardized Lung Diffusing Capacity for Carbon monoxide (TLCOc; p<0.05), and body surface area standardized TLCOc (TLCOc/BSA; p<0.001), whereas TLCOc/VA – insignificantly. After changing the position from sitting to supine most changes are similar, but the patients lacked a fall in percent-normal Residual Volume (RV), unlike in RV % Total Lung Capacity.
Conclusions: Mild restrictive lung dysfunction is associated with acquired valve diseases before left ventricular failure develops, and respiratory adaptation to the supine position is almost unaffected.
Keywords
bodypletysmography, lung diffusing capacity, sitting and supine positions, cardio-pulmonary by-pass
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