A client who is receiving an IV infusion of heparin sodium 25,000 units in 5% dextrose injection 500 mL at 1,000 units/hour has a partial thromboplastin time (PTT) of 10 seconds. The sliding scale prescription reads, "If the PTT is less than 65 seconds, increase the rate by 200 units/hour; and if the PTT is greater than 95 seconds, decrease the rate by 200 units/hour." The nurse should regulate the infusion pump for how many mL/hour?
(Enter numerical value only.)
The Correct Answer is ["24"]
To calculate the infusion rate, we need to use the formula:
Infusion rate (mL/h) = Dose (units/h) x Volume (mL) / Concentration (units)
First, we need to adjust the dose according to the sliding scale prescription based on the PTT result. In this case, since the PTT is less than 65 seconds, we need to increase the dose by 200 units/hour. Therefore, the new dose is 1,000 units/hour + 200 units/hour = 1,200 units/hour.
Plugging in the given values, we get:
Infusion rate (mL/h) = 1,200 units/h x 500 mL / 25,000 units
Simplifying, we get:
Infusion rate (mL/h) = 24 mL/h
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["3.5"]
Explanation
To calculate the total volume of diluted medication, we need to use the formula:
Total volume (mL) = Drug volume (mL) + Diluent volume (mL)
First, we need to calculate the drug volume by dividing the dose by the concentration. In this case, 1 mg of hydromorphone is equivalent to 0.5 mL of hydromorphone injection.
Plugging in the given values, we get:
Total volume (mL) = 0.5 mL + 3 mL
Simplifying, we get:
Total volume (mL) = 3.5 mL
Correct Answer is ["0.9"]
Explanation
To calculate the volume of filgrastim solution, we need to use the formula:
Volume (mL) = Dose (mcg) / Concentration (mcg/mL)
First, we need to calculate the dose by multiplying the prescribed rate by the weight in kilograms. To convert the weight from pounds to kilograms, we multiply by 0.454. In this case, 190 pounds is equivalent to 86.26 kg.
Plugging in the given values, we get:
Volume (mL) = 5 mcg/kg/day x 86.26 kg / 480 mcg/mL
Simplifying, we get:
Volume (mL) = 0.897 mL
Rounding to the nearest tenth, we get:
Volume (mL) = 0.9 mL
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