| Correlation between Caloric Intake and Lung Function Parameters in Patients with Chronic Obstructive Pulmonary Disease. |
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Ho Il Yoon, Young Mi Park, Ryowon Choue, Yeong Ae Kang, Sung Youn Kwon, Jae Ho Lee, Choon Taek Lee |
1Medicine and Respiratory Center, Seoul National University Bundang Hospital, Department of Internal Medicine, Seoul National University College of Medicine, Lung Institute of Seoul National University Medical Research Center, Seoul, Korea. dextro@snu.ac.k
2Department of Nutrition, Seoul National University Bundang Hospital, Seoul, Korea.
3Department of Medical Nutrition, Graduate School of East-West Medical Science, Research Institute of Clinical Nutrition, Kyung Hee University, Seoul, Korea. |
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| Abstract |
BACKGROUND
There are reports that food deprivation causes emphysematous changes in the lungs of rats and humans. However, the meaning of this phenomenon in patients with chronic obstructive pulmonary disease has not been evaluated. The aim of this study was to determine the correlations between the caloric intake and parameters of the lung function in patients with chronic obstructive pulmonary disease. METHODS: Patients with chronic obstructive pulmonary disease who had visited the respiratory clinic from March, 2006 for one year were enrolled in this study. The patients underwent pulmonary function tests, and a dietitian evaluated their nutritional intake using a food record method. RESULTS: There was no correlation between the total caloric intake and forced vital capacity (FVC, %predicted) or forced expiratory volume in one second (FEV1, %predicted). The total caloric intake showed a positive correlation with the diffusing capacity of carbon monoxide (DLCO %predicted, DLCO/VA %predicted), and a negative correlation with the total lung capacity (TLC, %predicted). Of the calories taken, only calories from protein intake correlated with the diffusing capacity of carbon monoxide (DLCO %predicted, DLCO/VA %predicted). CONCLUSION: The total caloric intake of patients with chronic obstructive pulmonary disease showed a positive correlation with the diffusing capacity of the lung, and a negative correlation with the total lung capacity. Further study on the linkage between the caloric intake and severity of emphysema is needed. |
| Key Words:
Chronic obstructive pulmonary disease, Nutrition, Emphysema, Energy intake, Lung function |
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