NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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How is the fluid need calculated for an individual weighing more than 20 kg?

1500 mL + (20 mL) * (weight in kg - 20)
BEE x activity factor x stress factor
mg x valence / MW
E = (58.5)(i) / (MW of drug)(1.8)

The correct answer is: 1500 mL + (20 mL) * (weight in kg - 20)

When calculating the fluid needs for an individual weighing more than 20 kg, the formula to use is 1500 mL plus 20 mL for every additional kilogram above 20 kg. This formula accounts for the normal fluid needs (1500 mL) and adjusts for the additional fluid requirements based on the individual's weight. This approach ensures that the fluid calculation is tailored to the specific weight of the patient, providing a more accurate estimation of their fluid needs. Options B, C, and D are unrelated to calculating fluid needs based on weight and are not applicable in this context. Option B refers to calculating energy expenditure, option C relates to molecular weight, and option D involves osmolarity calculations for IV solutions, none of which are relevant to determining fluid requirements based on weight.