This document provides information about a case study on a 90-year-old female patient diagnosed with type 2 diabetes mellitus. It includes the patient's personal details and medical history. Assessment findings over two days showed the patient appeared weak, had a non-healing diaper rash, and laboratory tests revealed high blood glucose levels. The document discusses the anatomy and physiology of glucose metabolism and the role of insulin. It also outlines the diagnostic criteria and procedures used to diagnose diabetes, including blood glucose monitoring and complete blood count. Nursing care focused on managing the patient's diabetes and diaper rash through diet, medication, and wound care.