A nurse is preparing to administer diphenhydramine 25 mg/kg IM to a child who weighs 68 lb. Available is diphenhydramine Injection 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["15.4"]
To calculate the correct dose of diphenhydramine, we need to follow these steps:
-
Convert pounds to kilograms:
- 68 lb * 0.4536 kg/lb = 30.8 kg
-
Calculate the total dose in milligrams:
- 25 mg/kg * 30.8 kg = 770 mg
-
Determine the volume needed from the available concentration:
- 770 mg * (1 mL / 50 mg) = 15.4 mL
Therefore, the nurse should administer 15.4 mL of diphenhydramine.
Answer: 15.4 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["100"]
Explanation
The label on the vial indicates that the insulin glargine has a concentration of 100 units per milliliter (U-100) and the total volume of the vial is 10 mL.
To calculate the total number of units in the vial, you multiply the volume by the concentration:
Total units = Volume × Concentration = 10 mL×100 units/mL = 1000 units
Then, to find out how many doses of 10 units each are in the vial,
you divide the total number of units by the number of units per dose:
Number of doses = Total units/ Units per dose
= 1000 units /10 units per dose
= 100 doses
So, the vial contains 100 doses of this medication when administered at 10 units per dose
Correct Answer is ["2"]
Explanation
Dosage per capsule: The available capsules contain 10 mg of nifedipine each.
Required dosage per dose: The nurse needs to administer 20 mg of nifedipine.
Number of capsules: To determine the number of capsules, we can divide the required dosage by the dosage per capsule:
Number of capsules = Required dosage (mg) / Dosage per capsule (mg)
Number of capsules = 20 mg / 10 mg/capsule
Number of capsules = 2
Since medication cannot be administered in parts of capsules, we round up to 2 to ensure the patient receives the full 20 mg dose.
Therefore, the nurse should administer 2 capsules of nifedipine 10 mg per dose.
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