A nurse is preparing to administer 0/9% sodium chloride (0.9% NaCl) 20ml/kg IV tp infuse over 6 hr to a school-age child who weighs 55 lbs. The nurse should set the IV pump to deliver how many ml/hr? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
8 mL/hr
8.3 mL/hr
83.3 mL/hr
83 mL/hr
The Correct Answer is D
Ordered dose of 0.9% Sodium Chloride: 20 mL/kg
Child's weight: 55 lbs
Infusion time: 6 hours
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 55 lbs x 0.453592 kg/lb = 24.94756 kg
Step 2: Calculate the total volume of 0.9% Sodium Chloride:
Total volume (mL) = Ordered dose (mL/kg) x Child's weight (kg)
Total volume (mL) = 20 mL/kg x 24.94756 kg
Total volume (mL) = 498.9512 mL
Step 3: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Total volume (mL) / Infusion time (hr)
Infusion rate (mL/hr) = 498.9512 mL / 6 hr
Infusion rate (mL/hr) = 83.15853333 mL/hr
Step 4: Round to the nearest whole number:
Infusion rate (mL/hr) ≈ 83 mL/hr
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Naxlex Comprehensive Predictor Exams
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Correct Answer is A
Explanation
A) Diazepam
Diazepam (a benzodiazepine) is the first-line treatment for status epilepticus, especially in emergency situations. It works by quickly calming overactive electrical activity in the brain and can be administered intravenously for rapid effect. Diazepam is commonly given as an initial treatment due to its fast onset of action in stopping seizures.
B) Phenobarbital
Phenobarbital is an anticonvulsant that can also be used for seizures, but it is typically used in cases where seizures persist after initial treatment, or as a long-term maintenance therapy. It is not the first-line drug for status epilepticus and is typically administered after other options like diazepam have been tried.
C) Valproic acid
Valproic acid is an anticonvulsant used for chronic seizure management (like for generalized seizures and some focal seizures), but it is not typically used as the immediate treatment in status epilepticus. It may be used in the long-term management or when other drugs fail, but diazepam or lorazepam are preferred for immediate control of seizures.
D) Phenytoin
Phenytoin is another commonly used anticonvulsant, but it has a slower onset of action compared to benzodiazepines like diazepam. While phenytoin is often used for long-term seizure prevention, it is not the most immediate choice in an emergency setting. After initial seizure control with a benzodiazepine, phenytoin may be given for continued seizure prevention.
Correct Answer is B
Explanation
Given:
Ordered dose of Digoxin: 0.375 mg daily
Available Digoxin tablets: 0.25 mg/tablet
Step 1: Set up the proportion:
Desired dose (mg) / Available tablet strength (mg/tablet) = Number of tablets
Step 2: Substitute the values:
0.375 mg / 0.25 mg/tablet = Number of tablets
Step 3: Calculate the number of tablets:
Number of tablets = 0.375 mg ÷ 0.25 mg/tablet
Number of tablets = 1.5 tablets
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