Major visceral surgery encompasses a broad range of operations with a wide variety of procedures that fall under this category. The majority of patients undergoing major visceral surgery often present with cancer and other medical comorbidities and are put at an elevated risk of a large number of medical and surgical postoperative complications

Complications following major visceral surgery are relatively common and are estimated to occur in 18-23% of patients . The management of complications is challenging for both the elderly patient and the perioperative team, and adds considerably to the cost of care particularly when further interventions involve readmission, unplanned admission to an intensive care unit, interventional radiology and/or an unplanned return to theatre. With the advancement of online patient portals, the use of internet to seek for health information is already a common phenomenon; Chatbot may become a more significant source of information for patients.

Inclusion Criteria:

• Patients aged 60 years old and above, both sex, scheduled for elective major visceral surgery, able to communicate in the local language, and without any cognitive impairment.

Exclusion Criteria:

• Elderly patients with a history of major psychiatric disorders, patients with a history of previous major visceral surgery, and patients who were unable to provide informed consent will be excluded from the study.