Question

1. There is 500 mg of potassium in 1 cup (240 ml) of orange juice. Your renal patient must watch his potassium intake not to exceed 2 mg per kg of body weight per day from Orange juice alone. How much juice (in ml) can this patient have per day if the patient weighs 135 lb?

Answer 1

Patient weight is 135lb

135 lb = 61.3 kg (1 kg = 2.2 lb)

The restriction is the potassium intake not to exceed 2 mg/kg of body weight per day from orange juice alone.

So, safe limit will be 122.6 mg of potassium per day from orange juice.

61.3kg x 2mg/kg = 122.6mg

240 ml of orange juice contains 500 mg of potassium.

(59 ml)

240mg + 500ml x 122.6mg=58.84ml

Answer - This patient can take 59 ml of orange juice daily not more than this.