Study: NCT06591507

Intervention type: DIETARY_SUPPLEMENT
Group type: EXPERIMENTAL
Intervention: BCAA Nutritional Intervention
Description: Patients will receive BCAA nutritional supplements. The supplement is taken orally twice daily, with each sachet containing 10g of powder, of which 6g is BCAA, and the remainder consists of preservatives and fruit flavorings to enhance palatability. The morning dose is taken with breakfast, and the second dose is taken as a late evening snack after dinner. For critically ill patients, enteral nutrition is provided instead. During each follow-up visit, patients are required to retain and submit all empty and unused sachets to accurately assess compliance. Dietitians will adjust the type and amount of food for each patient according to the guidelines of the European Society for Parenteral and Enteral Nutrition to ensure a total caloric intake of 35-40 kcal/kg and a protein intake of 1.2-1.5 g/kg (including BCAA supplements).

Intervention type: DIETARY_SUPPLEMENT
Group type: EXPERIMENTAL
Intervention: BCAA Nutritional Intervention
Description: Patients will receive BCAA nutritional supplements. The supplement is taken orally twice daily, with each sachet containing 10g of powder, of which 6g is BCAA, and the remainder consists of preservatives and fruit flavorings to enhance palatability. The morning dose is taken with breakfast, and the second dose is taken as a late evening snack after dinner. For critically ill patients, enteral nutrition is provided instead. During each follow-up visit, patients are required to retain and submit all empty and unused sachets to accurately assess compliance. Dietitians will adjust the type and amount of food for each patient according to the guidelines of the European Society for Parenteral and Enteral Nutrition to ensure a total caloric intake of 35-40 kcal/kg and a protein intake of 1.2-1.5 g/kg (including BCAA supplements).

Intervention type: DIETARY_SUPPLEMENT
Group type: EXPERIMENTAL
Intervention: BCAA Nutritional Intervention
Description: Patients will receive BCAA nutritional supplements. The supplement is taken orally twice daily, with each sachet containing 10g of powder, of which 6g is BCAA, and the remainder consists of preservatives and fruit flavorings to enhance palatability. The morning dose is taken with breakfast, and the second dose is taken as a late evening snack after dinner. For critically ill patients, enteral nutrition is provided instead. During each follow-up visit, patients are required to retain and submit all empty and unused sachets to accurately assess compliance. Dietitians will adjust the type and amount of food for each patient according to the guidelines of the European Society for Parenteral and Enteral Nutrition to ensure a total caloric intake of 35-40 kcal/kg and a protein intake of 1.2-1.5 g/kg (including BCAA supplements).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Muscle Rehabilitation Training
Description: Phase 1: Resistance Training (During Hospital Stay, First Month) Phase 2: Resistance Training (Home-Based, From Hospital Discharge Until 3 Months Post-Surgery) Phase 3: Physical Activity Training (Post-Surgery, After 3 Months)

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Muscle Rehabilitation Training
Description: Phase 1: Resistance Training (During Hospital Stay, First Month) Phase 2: Resistance Training (Home-Based, From Hospital Discharge Until 3 Months Post-Surgery) Phase 3: Physical Activity Training (Post-Surgery, After 3 Months)

Intervention type: DIETARY_SUPPLEMENT
Group type: PLACEBO_COMPARATOR
Intervention: Standard Nutritional Therapy
Description: Standard Nutritional Therapy