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 ["17"]
Explanation
Here's how to calculate the drip rate (drops/minute) for the ganciclovir infusion:
1. We know:
Ganciclovir dose: 375 mg (given)
Infusion bag volume: 150 mL (given)
Infusion time: 90 minutes (given) = 1.5 hours (convert minutes to hours)
Drip chamber calibration: 10 drops/mL (given)
2. We need to find:
Drip rate (drops/minute)
3. Steps:
Calculate the concentration of ganciclovir in the bag (assuming all medication is in the bag):
Concentration (mg/mL) = Dose (mg) / Volume (mL)
Concentration (mg/mL) = 375 mg / 150 mL
Concentration (mg/mL) = 2.5 mg/mL
Calculate the total volume to infuse (considering the prescribed dose):
We already know the volume of the bag (150 mL), but this might contain more volume than needed to deliver the prescribed dose.
Calculate the volume to infuse based on the dose and concentration:
Volume to infuse (mL) = Dose (mg) / Concentration (mg/mL)
Volume to infuse (mL) = 375 mg / 2.5 mg/mL
Volume to infuse (mL) = 150 mL (This confirms that the full bag volume delivers the prescribed dose)
Calculate the infusion rate (mL/hour):
Infusion rate (mL/hour) = Total volume to infuse (mL) / Infusion time (hours)
Infusion rate (mL/hour) = 150 mL / 1.5 hours
Infusion rate (mL/hour) = 100 mL/hour
Calculate the drip rate (drops/minute):
Drip rate (drops/minute) = Infusion rate (mL/hour) x Drip chamber calibration (drops/mL)
Drip rate (drops/minute) = 100 mL/hour x 10 drops/mL
Drip rate (drops/minute) = 1000 drops/hour (convert to minutes)
Drip rate (drops/minute) = 1000 drops/hour / 60 minutes/hour
Drip rate (drops/minute) = 16.67 drops/minute (round to nearest whole number as requested)
Therefore, the nurse should regulate the gravity infusion at approximately 17 drops/minute.
Correct Answer is ["7.5"]
Explanation
Here's how to calculate the concentration (mg/mL) of the reconstituted ceftazidime solution:
We know:
Total ceftazidime content after reconstitution: 750 mg (given)
Reconstitution volume: 100 mL sterile water (given)
We need to find:
Concentration of ceftazidime in mg/mL after reconstitution
Calculation:
Concentration (mg/mL) = Total amount of medication (mg) / Volume after reconstitution (mL)
Concentration (mg/mL) = 750 mg / 100 mL
Concentration (mg/mL) = 7.5 mg/mL (round to nearest tenth)
Therefore, the reconstituted ceftazidime medication provides 7.5 mg/mL.
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