MS-3603

A homeless 40-year-old male had an emergency inguinal hernia repair 48 hours ago. He has a BMI of 15. The patient is currently on a feeding plan of 35 kcal/kg/day without any additional medications. The nursing staff reaches out to you as the patient has become disoriented and unsteady. Upon examination, the patient displays diplopia, nystagmus, and disorientation to place. What is the probable diagnosis?