A nurse is preparing to administer morphine 0.1 mg/kg IM to a school-age child who weighs 88 Ib. The amount available is morphine 4 mg/mL. How many ml should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1"]
Step-by-Step Solution:
Convert the child's weight from pounds to kilograms.
1 pound is approximately 0.453592 kilograms.
88 pounds = 88 x 0.453592 = 39.916736 kilograms.
Calculate the total dose of morphine.
The prescribed dose is 0.1 mg/kg.
The child weighs 39.916736 kg.
Total dose = 0.1 mg/kg x 39.916736 kg = 3.9916736 mg.
Calculate the volume of morphine injection to administer.
The available morphine injection is 4 mg/mL.
To find the volume, we can set up a proportion:
4 mg / 1 mL = 3.9916736 mg / x mL
Cross-multiplying:
4x = 3.9916736
Solving for x:
x = 3.9916736 / 4 = 0.9979184 mL
Round the answer to the nearest whole number: 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.005"]
Explanation
1. Determine the desired dose and the available concentration:
- Desired dose: 0.25 mg
- Available concentration: 50 mg/mL
2. Set up the calculation:
- We need to find out how many mL contain 0.25 mg of digoxin. We can use the following formula:
- (Desired Dose) / (Available Concentration) = Volume to Administer
3. Perform the calculation:
- 0.25 mg / 50 mg/mL = 0.005 mL
4. Round the answer:
- The answer is 0.005 mL.
- Since the question asks to round to the nearest whole number and use a leading zero if it applies, and not use a trailing zero, and since this number is less than 1, we add a leading zero.
- The answer is 0.005mL.
Therefore, the nurse should administer 0.005 mL of digoxin elixir.
Correct Answer is ["0.45"]
Explanation
Identify the given information:
Dose of tobramycin: 2.5 mg/kg/day
Weight of the child: 48 lb
Concentration of tobramycin injection: 40 mg/mL
Convert the child's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total daily dose of tobramycin in mg:
Total daily dose = Dose/kg/day x Weight (kg)
Substitute the values:
Total daily dose = 2.5 mg/kg/day x 48 lb x (0.453592 kg/1 lb)
Total daily dose ≈ 54.43 mg
Calculate the dose per dose (every 8 hours):
Dose per dose = Total daily dose / 3
Substitute the values:
Dose per dose = 54.43 mg / 3
Dose per dose ≈ 18.14 mg
Calculate the volume of tobramycin injection to be administered:
Volume = Dose per dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 18.14 mg / 40 mg/mL
Volume ≈ 0.45 mL
Round the answer to the nearest hundredth:
Volume ≈ 0.45 mL
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