This case study examines a 75-year-old man admitted to the emergency department with a urinary tract infection (UTI) and sepsis. The analysis focuses on arterial blood gas (ABG) results, including pH levels, PaO2, PaCO2, and HCO3 levels, to understand the patient's condition. The ABG results revealed metabolic acidosis due to a low pH, decreased oxygen levels (hypoxia), and low PaCO3 levels. The study also highlights the presence of ketoacidosis and a high lactate level, indicating a severe condition. The findings suggest that the UTI may have affected kidney function, necessitating immediate pharmacological intervention to support the patient's well-being. References from Perkins (2016), Akirov & Elis (2016), Khanal (2016), Liang (2016) and Rossaint & Zarbock (2015) are included.