A 45-year-old man with confusion is brought to the Emergency Department by ambulance.

This patient has life-threatening complications of missed dialysis , including severe hyperkalemia (K⁺ 7.1 mmol/L), metabolic acidosis (HCO₃⁻ 11 mmol/L), volume overload with pulmonary edema (hypoxia, crackles, elevated JVP), and altered mental status. MCCQE objectives emphasize immediate recognition and treatment of emergent indications for dialysis (AEIOU: Acidosis, Electrolyte abnormalities, Intoxication, Overload, Uremia) . This patient meets multiple criteria—particularly refractory hyperkalemia and pulmonary edema—requiring urgent hemodialysis .

In emergencies where delay would risk death or serious harm, treatment proceeds under implied consent , even if the patient is confused and capacity is uncertain. Contacting family or psychiatry would dangerously delay life-saving care. While temporizing measures (e.g., IV calcium, insulin/glucose) may be given, definitive management is emergent dialysis. Morphine and furosemide alone are inadequate in severe renal failure with life-threatening hyperkalemia. Therefore, immediate initiation of urgent dialysis is the correct next step.