A client is receiving heparin intravenous (IV) at a rate of 1,800 units/hour. The IV solution is labeled, "Heparin Sodium 20,000 Units in 5% Dextrose Injection 500 mL* After receiving the partial thromboplastin time (PTT) result, the healthcare provider prescribes an Increase of 5 mL/hour in the IV rate. The nurse should set the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
The Correct Answer is ["50"]
First, let’s calculate the current infusion rate in mL/hour.
The IV solution contains 20,000 units of heparin in 500 mL, so the concentration is:
Concentration = Total units/ Total volume = 20,000 units /500 mL = 40 units/mL
The client is currently receiving 1,800 units/hour. At a concentration of 40 units/mL, this dosage is equivalent to:
Current rate = Dose/ Concentration = 1,800 units/hour / 40 units/mL = 45 mL/hour
The healthcare provider prescribed an increase of 5 mL/hour in the IV rate. Therefore, the new rate should be:
New rate = Current rate + Increase = 45 mL/hour + 5 mL/hour = 50 mL/hour
So, the nurse should set the infusion pump to deliver 50 mL/hour. If rounding is required, this is already rounded to the nearest whole number.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2.4"]
Explanation
Here's how to calculate the volume (mL) of the reconstituted cefazolin solution the nurse should administer for each dose:
1. We know the following:
Prescribed dose: 800 mg cefazolin (given)
Vial information:
Contains 1 gram cefazolin (given) = 1000 mg (since 1 gram = 1000 milligrams)
Reconstituted with 2.5 mL sterile water for injection (given)
Yields a total volume of 3.0 mL (given)
2. We need to find the concentration of cefazolin (mg/mL) in the reconstituted solution.
3. Then, we can find the volume (mL) to administer for the prescribed dose (800 mg) considering the concentration.
Steps:
a. Calculate the concentration after reconstitution:
Total volume after reconstitution = 3.0 mL (given)
Total amount of cefazolin after reconstitution = 1 gram (from the vial) = 1000 mg
Concentration (mg/mL) = Total amount of medication (mg) / Total volume after reconstitution (mL)
Concentration (mg/mL) = 1000 mg / 3.0 mL
Concentration (mg/mL) = 333.33 mg/mL (round to one decimal place)
b. Calculate the volume to administer:
Volume to administer (mL) = Dose (mg) / Concentration (mg/mL)
Volume to administer (mL) = 800 mg / 333.33 mg/mL
Volume to administer (mL) = 2.4 mL (round to nearest tenth)
Therefore, the nurse should administer approximately 2.4 mL of the reconstituted cefazolin solution intramuscularly every 6 hours.
Correct Answer is ["83"]
Explanation
Here's how to calculate the infusion pump rate (mL/hour) for the penicillin G administration:
We know:
Total penicillin G dose: 20 million units (given)
Total volume of saline solution: 2 liters (given) = 2000 mL (convert liters to mL)
Penicillin G concentration in saline delivered by pharmacy: 10 million units/liter (given)
We need to find:
Infusion rate (mL/hour)
Steps:
Calculate the concentration of penicillin G in the final infusion solution:
We cannot directly add the penicillin G units to the saline volume because they represent different quantities. Penicillin G is measured in units, while saline volume is measured in liters (or mL).
We need to find the total volume of saline containing the prescribed dose of penicillin G:
We know the total penicillin G dose (20 million units) and the concentration of penicillin G in the saline delivered by pharmacy (10 million units/liter).
Volume of saline containing the dose (liters) = Total penicillin G dose (units) / Concentration of penicillin G in saline (units/liter)
Volume of saline containing the dose (liters) = 20 million units / 10 million units/liter
Volume of saline containing the dose (liters) = 2 liters (This confirms we received the correct concentration from the pharmacy to deliver the prescribed dose)
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