mrcem2-1171

mrcem2-1171

A 72 year old female is brought into the emergency department with a history of worsening dizziness, muscle cramps, fatigue, and weakness. Examination reveals the patient to have normal blood pressure, regular heart sounds, and a pulse rate of 88 beats per minute. Respiratory examination shows resonant chest sounds in all areas, normal respiratory rate, and oxygen saturations of 96% with coarse crackles heard at the right base. Neurological examination is unremarkable. You order urine and blood tests for analysis. The results are as follows:

Na+ 122 mmol/l
K+ 5.2 mmol/l
Urea 7.1 mmol/l
Creatinine 98 µmol/l
Glucose 6.4 mmol/l
Urine osmolality 410 mosmol/kg

Which of the following actions should be included in this patient’s management plan?