This document presents three nursing case studies, each detailing a different patient scenario and the corresponding nursing interventions. The first case focuses on a 9-year-old patient, Haley, diagnosed with type 1 diabetes, highlighting the assessment of hyperglycemia, polyuria, and polydipsia. The case analyzes the pathophysiology of the condition, identifies nursing priorities such as managing hyperglycemia and low blood pressure, and outlines the actions taken, including patient education and medication administration. The second case continues with Haley, presenting her in the ICU with severe dehydration, low blood pressure, and metabolic acidosis. The case emphasizes the importance of managing hypoglycemia and establishes goals to stabilize the patient's condition. The final case introduces Tom Habury, a 58-year-old with a history of depression and chest pain due to chronic angina. This case explores the assessment of his condition, including high blood pressure and the administration of GTN and morphine. The document emphasizes the importance of monitoring vital signs, managing chest pain, and preventing potential complications like heart attack or stroke. Each case includes reflection on the learning process and the application of the clinical reasoning cycle.