A High School Athlete Is Brought to the Emergency Department

A high school athlete is brought to the emergency department after collapsing during outdoor practice on a hot day. The patient is weak, irritable, and confused. Serum sodium is 152 mEq/L and has dry mucous membranes and tachycardia. What is the initial approach to rehydration in this patient?

A) Hypotonic intravenous fluid replacement
B) Intravenous fluid resuscitation with an isotonic solution
C) Loop diuretics and hypotonic intravenous fluids
D) Oral water replacement