What body systems should a nurse focus on in the assessment of a postoperative gastrectomy patient?

In assessing a postoperative gastrectomy patient, a nurse should focus on the gastrointestinal system to monitor for signs of complications such as nausea, vomiting, or ileus. Additionally, the respiratory system is crucial to assess for any issues related to anesthesia or reduced mobility, which can increase the risk of pneumonia. The nurse should also evaluate the cardiovascular system for signs of fluid imbalance or shock, and the integumentary system to check the surgical site for infection or proper healing.