[High-caloric nutrition in chronic obstructive lung disease]

Area of Science:

• Pulmonary Medicine
• Nutritional Science
• Clinical Research

Background:

• Low body weight (<90% ideal) adversely affects chronic obstructive pulmonary disease (COPD) prognosis.
• Short-term studies suggest increased caloric intake (45 kcal/kg) improves respiratory function, exercise tolerance, and immunity in COPD patients.

Purpose of the Study:

• To evaluate the effect of a 12-month high-calorie diet intervention on nutritional status, respiratory parameters, and exercise capacity in COPD patients.

Main Methods:

• A 12-month randomized trial involving 30 COPD patients (average FEV1 0.8 L).
• 14 patients received a high-calorie diet, partially supplemented with Fresubin (fluid nutrient formula).
• Compared weight gain, skin fold thickness, ventilatory parameters, and 6-minute walking distance against a control group.

Main Results:

• Significant weight gain (7 kg, p=0.003) was observed in the intervention group, but the difference versus the control group was not statistically significant (p=0.08).
• No significant differences were found in skin fold thickness, ventilatory parameters, or 6-minute walking distance between groups.
• Patients receiving dietary intervention reported impressive subjective improvements, potentially due to increased attention.

Conclusions:

• While objective measures did not show statistically significant differences, subjective improvements in COPD patients with dietary intervention suggest a potential benefit.
• Dietary counseling emphasizing increased intake of calories, vitamins, and calcium is crucial for managing COPD patients.