Final answer:
The manual IV flow rate for administering cefazolin 1 g in 0.9 sodium chloride 250ml over 30 minutes with a drop factor of 10gtt/ml is 83.33 gtt/min, rounded to 83 gtt/min.
Step-by-step explanation:
The student is asking how to calculate the flow rate for administering a dose of cefazolin via an intravenous (IV) bolus. Using a manual IV drop factor of 10 gtt/ml, the question requires the determination of the appropriate IV flow rate to deliver the medication over the specified time.
To calculate this, we use the formula: Flow rate (gtt/min) = (Total volume in ml × Drop factor) / Total time in minutes. In this case, Total volume is 250 ml, Drop factor is 10 gtt/ml, and Total time is 30 min. Substituting the values, we get: Flow rate = (250 ml × 10 gtt/ml) / 30 min = 2500 gtt / 30 min = 83.33 gtt/min. Since the infusion pump cannot be set to a non-integer value, the flow rate would be rounded to the nearest whole number, which is 83 gtt/min, making option D (84 gtt/min) the closest choice even though it is a slight overestimation.