Find the flow rate for manual regulation:__________.
Ordered: 220 mL D5LR to infuse over 4 h using tubing calibrated to 60 gtt/mL
The Correct Answer is ["55"]
Calculation:
Total volume = 220 mL.
Drop factor = 60 gtt/mL.
- Convert the total time from hours to minutes.
Total time = 4 hours × 60 minutes/hour
= 240 minutes.
- Calculate the flow rate.
Flow rate (gtt/min) = (Total volume (mL) × Drop factor (gtt/mL)) / Time (min)
= (220 mL × 60 gtt/mL) / 240 minutes
= 13200 gtt / 240 minutes
= 55 gtt/min.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["3.73"]
Explanation
- Calculate the total dose in milligrams (mg) for the patient.
Total dose (mg) = Ordered dose (mg/kg) × Patient weight (kg)
= 10 mg/kg × 56 kg
= 560 mg.
Dosage strength = 150 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Total dose (mg) / Dosage strength (mg/mL)
= 560 mg / 150 mg/mL
= 3.7333... mL.
- Round to the nearest hundredth.
= 3.73 mL/dose.
Correct Answer is D
Explanation
A. hypertonic: Hypertonic solutions have a higher solute concentration than plasma, pulling water out of cells and shrinking them. Lactated Ringer’s does not draw water from cells, so it is not classified as hypertonic.
B. therapeutic: "Therapeutic" refers to the intended treatment effect of a medication or fluid but is not a classification related to the osmolarity or fluid balance behavior of a solution.
C. isotonic: Lactated Ringer's has a similar osmolarity to plasma, meaning it does not cause water to move into or out of cells. Because it maintains fluid balance across cell membranes, it is accurately classified as an isotonic solution.
D. hypotonic: Hypotonic solutions have a lower solute concentration than body fluids, causing water to move into cells and potentially leading to cellular swelling. Lactated Ringer's does not cause this shift and therefore is not hypotonic.
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