A patient is prescribed 250 mL of packed red blood cells to be transfused over 120 minutes. The drop factor on the tubing is 15 gtt/mL. At what rate should the nurse regulate the IV (gtt/min)? (round to the nearest whole number)
The Correct Answer is ["31"]
(Volume to be infused (mL) × Drop factor (gtt/mL)) / Time (min).
For the patient prescribed 250 mL of packed red blood cells with a drop factor of 15 gtt/mL over 120 minutes, the calculation would be (250 mL × 15 gtt/mL) / 120 min, which equals 31.25 gtt/min.
Therefore, the nurse should regulate the IV to 31 gtt/min.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Counting the number of large squares between R-R intervals and dividing by 30 is not the correct method for estimating the ventricular rate on an ECG strip.
B. Printing a 1-minute ECG strip and counting the QRS complexes (option B) is accurate but unnecessary for a quick estimation.
C. The most common and efficient method for estimating the ventricular rate quickly is to count the number of QRS complexes in a 6-second strip (often marked by two dashed lines) and multiply by 10. This gives an estimate of the heart rate per minute.
D. Counting the number of small squares between QRS complexes and dividing by 1500 is the most accurate method but requires more time and precision than counting QRS complexes in 6 seconds.
Correct Answer is D
Explanation
A. This would be concerning, but it is not the correct choice. If a pacemaker is functioning abnormally, it would require an assessment and troubleshooting, not simply a routine rhythm.
B. This is typical for biventricular pacemakers used in heart failure patients, but it would not apply to a patient with a standard pacemaker unless specified. A recent pacemaker placement does not necessarily indicate biventricular pacing.
C. This is correct if only the atrium is paced; however, in the case of a typical pacemaker like DDD (dual- chamber pacemaker), both the atrium and ventricle are paced.
D. This is correct for dual-chamber pacemakers (like DDD), which pace both the atrium and the ventricle to coordinate the heart's rhythm.
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