A nurse is preparing to administer piperacillin 3.375 g by intermittent IV bolus every 6 hr. Available in piperacillin 3.375 g in dextrose 5% in water (D5W) 100 mL to infuse over 30 min. The nurse should set the IV pump to deliver how many mL/hr?
ANSWER.
* Calculation of ml/hr.
ml/hr = Volume(ml) / Time(hr).
Calculation of volume(ml).
Volume(ml) = Desired dose/Dose in hand * Quantity.
Here
Desired dose (D) = 3.375 g.
Dose in hand (H) = 3.375 g.
Quantity (Q) = 100 ml.
As per above formula
Volume(ml) of piperacillin required = D/H * Q
= 3.375/3.375 * 100
= 100 ml.
Time(hr) = 0.5 hr (30 min)
So
ml/hr = 100 / 0.5
= 200 ml/hr.
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