Mr. Santos, a 55-year-old Male, Was Admitted to the Medical-surgical Unit with Severe Abdominal Pain. He Rates His Pain as 9 out of 10 on the Pain Scale. the Pain Started Suddenly and Is Localized in the Right Lower Quadrant. He Has a History of Appendicitis and Underwent an Appendectomy 10 Years Ago. on Physical Examination and Rebound Tenderness Is Present in the Right Lower Quadrant