Effects of an acute exacerbation on nutritional and metabolic profile of patients with COPD

In this study, we investigated the influence of an acute disease exacerbation on the nutritional and metabolic status of patients with chronic obstructive pulmonary disease (COPD). The study group consisted of 23 patients acutely admitted to the hospital for standardized medical treatment. Dietary intake (dietary records and diet history), resting energy expenditure (ventilated hood), body composition (bioelectrical impedance spectroscopy) and disease symptoms (visual analogue scale) were assessed on admission, daily throughout the hospitalization period, at discharge and 3 months thereafter in stable clinical condition. Dietary intake, since aggravation of disease symptoms, prior to admission, (5,640+/-2,671 kJ) was significantly lower than habitual intake (7,863+/-2,005 kJ). The balance between dietary intake with measured resting energy expenditure and estimated diet-induced thermogenesis was severely impaired during the first 3 days of hospitalization, stabilizing thereafter to 145+/-24% at discharge. Resting energy expenditure decreased from 6,812+/-900 kJ (123+/-11%) on admission to 6,196+/-795 kJ (113+/-14%) at discharge (p<0.001). During treatment, no significant shift in water compartments, fat-free mass and body weight was seen. Follow-up data were obtained from 10 out of 23 patients. Three months after admission, dietary intake was not significantly different from usual dietary intake (8,512+/-2,290 and 8,415+/-2,600 kJ, respectively), resting energy expenditure was similar to the value at discharge, and a significant body weight gain was seen. We conclude that an acute exacerbation of chronic obstructive pulmonary disease is accompanied by an impaired energy balance due to a decreased dietary intake and an increased resting energy expenditure.

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