PTCB Math Practice Exam - Prep & Practice Questions Study Guide

To determine the correct dosage in milligrams for a patient weighing 116 lbs with a dosage order of 28 mg/kg, the following steps are taken:

First, convert the patient's weight from pounds to kilograms. The conversion factor is that 1 kg is approximately equal to 2.2 lbs. Therefore, to convert 116 lbs to kg, divide the weight by 2.2:

116 lbs ÷ 2.2 = 52.727 kg (approximately).

Next, multiply the weight in kilograms by the prescribed dosage in mg/kg:

52.727 kg × 28 mg/kg = 1476.44 mg.

This result indicates that the patient should receive approximately 1476.44 mg per dose. Thus, the correct answer reflects the calculated dosage accurately based on the dosage order and the patient's weight.