Order: 1000ml D5W at 120ml/hr. Available: Macro drop 15ml/hr. What is the drip factor in drops per minute?
30 gtt/min.
33 gtt/min.
31 gtt/min.
32 gtt/min.
The Correct Answer is A
Step 1 is (120 mL ÷ 60 min) × 15 gtt/mL.
Step 2 is (2 mL/min) × 15 gtt/mL.
Step 3 is 30 gtt/min.
Final calculated answer is 30 gtt/min.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Magnesium plays a role in various cellular functions, including enzyme activity and muscle contraction, but it does not directly inactivate troponin to enable actin and myosin interaction.
Choice B rationale
Sodium is essential for action potential generation and nerve impulse transmission but does not directly influence troponin activity or muscle contraction through actin and myosin bridge formation.
Choice C rationale
Potassium is critical for maintaining cellular resting membrane potential and repolarization of cells but does not play a direct role in inactivating troponin to facilitate muscle contraction.
Choice D rationale
Calcium is the electrolyte that inactivates troponin, allowing actin and myosin to form cross-bridges and contract muscle fibers. Calcium binds to troponin, causing a conformational change that exposes binding sites for myosin on actin filaments.
Correct Answer is B
Explanation
Choice A rationale
Ethosuximide (Zarontin) is used to treat absence seizures and is not suitable for emergency control of status epilepticus. It primarily works by affecting the T-type calcium channels in the brain.
Choice B rationale
Diazepam (Valium) is used in the emergency control of status epilepticus due to its fast-acting anticonvulsant properties. It enhances the effect of the neurotransmitter GABA, leading to an inhibitory effect on neuronal activity.
Choice C rationale
Phenobarbital (Luminal) is a barbiturate used for long-term management of epilepsy but is less preferred for immediate emergency control of status epilepticus due to its slower onset of action.
Choice D rationale
Phenytoin (Dilantin) can be used for the maintenance treatment of seizures, but it is less effective for the immediate control of status epilepticus compared to benzodiazepines like diazepam.
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