This nursing assignment presents a comprehensive overview of Hyperosmolar Hyperglycemic Syndrome (HHS), focusing on the case of Mr. Stan Coombe, a 76-year-old patient with type 2 diabetes mellitus, pneumonia, and a urinary tract infection. The report begins with an introduction to HHS, detailing its characteristics and common causes, followed by an ISBAR handover providing a clear patient situation, background, assessment, and recommendations. The pathophysiology of HHS is explained, highlighting the mechanisms behind hyperglycemia and hyperosmolarity. The report then discusses multidisciplinary care, identifying the main problems, goals of care, and outlining both medical and nursing interventions. Medical care includes airway management, intravenous access, and aggressive fluid resuscitation, while nursing care emphasizes the importance of assessing precipitating factors, monitoring vital signs, and providing laboratory studies. The report concludes by emphasizing the need for prompt treatment, including intravenous fluids and insulin, to address dehydration and hyperglycemia. References to relevant medical literature are included to support the information presented.