The healthcare provider prescribes ganciclovir 375 mg intravenous (IV) every 12 hour to infuse over 90 minutes. The pharmacy delivers ganciclovir 375 mg in a 150 mL IV bag. How many drops/minute should the nurse regulate the gravity infusion using a drip chamber that delivers 10 drops/mL? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["17"]
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.20"]
Explanation
First, we need to convert the client’s weight from pounds to kilograms since the dosage is prescribed in mg/kg. We know that 1 kg is approximately 2.20462 pounds. So,
Weightinkg = Weightinpounds / 2.20462 = 132/ 2.20462 ≈ 59.87kg
The prescribed dosage is 1 mg/kg every 12 hours, so the total daily dosage (for 24 hours) in mg would be:
Dailydosageinmg= 2 × (Dosageperkg × Weightinkg) = 2 × (1mg/kg × 59.87kg) ≈ 119.74mg
The medication is available in a concentration of 60 mg/0.6 mL, which simplifies to 100 mg/mL. Therefore, the volume to be administered per day in mL would be:
VolumeinmL=Dailydosageinmg/ Concentrationinmg/mL = 119.74mg / 100mg/mL ≈ 1.20mL
So, the nurse should administer approximately 1.20 mL of enoxaparin per day. Always consult with a healthcare professional for accurate information.
Correct Answer is ["12","000"]
Explanation
Here's the calculation for how many heparin units the client will receive in 12 hours:
Heparin concentration: The concentration of the heparin solution is 20,000 units in 500 mL (given). This translates to 40 units/mL (concentration = total units / volume).
Infusion rate: The client is receiving the solution at a rate of 25 mL/hour (given).
Time: We need to find the total heparin units received over 12 hours.
Calculation:
Find the total volume of the solution infused in 12 hours:
Total volume (mL) = Rate (mL/hour) x Time (hours)
Total volume (mL) = 25 mL/hour x 12 hours
Total volume (mL) = 300 mL
Find the total heparin units delivered in the infused volume:
Total heparin units = Volume of solution (mL) x Concentration (units/mL)
Total heparin units = 300 mL x 40 units/mL
Total heparin units = 12,000 units
Therefore, the client will receive 12,000 units of heparin in 12 hours.
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