an iv infusion of gamma globulin 2g/kg over 12 hours has been ordered for a 22 lb child. which dose is correct?
attempt
22lb/ 2.2kg= 10kg
2g x 10kg= 20g/day
20g/ 2 doses (24hr/12hr)= 10g
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To calculate the correct dose of IV infusion of gamma globulin for the 22 lb child, you need to convert the weight from pounds to kilograms.
1 lb is approximately equal to 0.45 kg, so to convert the weight from pounds to kilograms, divide the weight in pounds by 2.2.
In this case, the child weighs 22 lbs, so the weight in kilograms is 22 lbs / 2.2 kg/lb = 10 kg.
The ordered dose is 2g/kg, so you need to multiply the weight (10 kg) by the dose (2 g/kg) to get the total dose.
Total dose = 10 kg x 2 g/kg = 20 g.
The total dose of gamma globulin for the 22 lb child is 20 grams.
However, in the question, it states that the dose is to be given over 12 hours. To calculate the dose per hour, divide the total dose (20 g) by the infusion time (12 hours).
Dose per hour = 20 g / 12 hours = 1.67 g/hour.
Therefore, the correct dose for the IV infusion of gamma globulin for the 22 lb child is 1.67 g/hour.