mrcem2-0595

A 68 year old is brought into the emergency department by ambulance after experiencing a seizure. The nursing home staff inform the patient has been exhibiting increased lethargy in recent days. Blood samples are sent to the laboratory and the lab calls shortly after to report the abnormal sodium level (shown below):

Na+ 116 mmol/l
K+ 4.9 mmol/l
Urea 10.5 mmol/l
Creatinine 109 µmol/l

What is the most suitable course of action for managing this patient?