Question

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

Answer:

58.79 mL of juice

Step-by-step explanation:

To do this, let's gather the data first:

In 1 cup of orange juice we have 500 mg of potassium. A patient weights 135 lb, and he needs to take care of it's potassium intake and not exceed 2 mg of K / kg per day.

So obviously he cannot drink a whole cup of orange juice. It has to be less. In order to know this, we need to know first the weight in kg. 1 lb equals 0.4536 kg so in 135 lb:

W = 135 lb * 0.4536 kg/lb = 61.24 kg

Now, we need to know with this weight, how much potassium it can takes:

Intake = 61.24 kg * 2 mg/kg = 122.48 mg of K

So, the maximum amount of potassium per day is 122.48 mg. This means that the quantity of orange juice this person can take is:

Juice = 122.48 mg * 240 mL / 500 mg

Juice = 58.79 mL of juice or simply 59 mL