Perioperative Immunonutrition Intervention and Oral Decontamination in Elderly Surgical Patients

Patients in the intervention group will receive additional immunonutrition supplementation, which is oral intake of ORAL IMPACT™ 2 servings per day from the day of allocation at the preoperative anesthesia clinic until the day before surgery.

Patients in the intervention group will receive oral chlorhexidine decontamination using 0.12% chlorhexidine oral rinse twice daily from the day before surgery until postoperative day 3.