Final answer:
To calculate the amount of amikacin to add to the 200 ml of d5w, we need to determine the total dose required for the patient based on their weight. The dose is given as 7.5 mg/kg, and the patient weighs 90 kg, so the total dose needed is 675 mg. The concentration of the amikacin in the vial is 250 mg/ml, so you will need to add 2.7 ml of amikacin to the 200 ml of d5w.
Step-by-step explanation:
To calculate the amount of amikacin to add to the 200 ml of d5w, we need to determine the total dose required for the patient based on their weight. The dose is given as 7.5 mg/kg, and the patient weighs 90 kg, so the total dose needed is 7.5 mg/kg x 90 kg = 675 mg.
The concentration of the amikacin in the vial is 250 mg/ml, so we can use the following equation to determine the volume of amikacin to add: volume (ml) = dose (mg) / concentration (mg/ml). Plugging in the values, we get volume (ml) = 675 mg / 250 mg/ml = 2.7 ml.
Therefore, you will need to add 2.7 ml of amikacin to the 200 ml of d5w.