A nurse is infusing an IV fluid at 40 mL/hr, and 376 mL of fluid remains in the bag. The current time is 19:30. What is the infusion time in hr and min?
9 hr and 15 min
9 hr and 24 min
9 hr and 30 min
9 hr and 40 min
The Correct Answer is B
We can use the following formula to calculate the infusion time:
Infusion time (in hours) = Remaining volume (in mL) / Infusion rate (in mL/hr)
First, let's convert the current time to minutes since we will be calculating the infusion time in minutes as well:
19:30 = 19 hours x 60 minutes/hour + 30 minutes = 1170 minutes Now we can substitute the given values into the formula:
Infusion time (in hours) = 376 mL / 40 mL/hr Infusion time (in hours) = 9.4 hours
To convert this to hours and minutes, we can separate the integer and decimal parts of the answer:
9 hours (integer part) and 0.4 hours x 60 minutes/hour = 24 minutes (decimal part)
Therefore, the infusion time is 9 hours and 24 minutes, and the infusion will finish at approximately 04:54 (19:30 + 9 hours and 24 minutes).
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Related Questions
Correct Answer is B
Explanation
To calculate the dose of dobutamine in mg/hr, we need to convert the patient's weight from pounds (lb) to kilograms (kg) and then use the ordered dose of 10 mcg/kg/min.
1 lb = 0.453592 kg (rounded to 6 decimal places) Patient's weight in kg = 110 lb x 0.453592 kg/lb
Patient's weight in kg = 49.89512 kg (rounded to 5 decimal places)
Now we can calculate the dose of dobutamine in mg/hr using the following formula:
Dose (in mg/hr) = Weight (in kg) x Dose (in mcg/kg/min) x 60 (to convert minutes to hours) / 1000 (to convert mcg to mg)
Dose (in mg/hr) = 49.89512 kg x 10 mcg/kg/min x 60 / 1000
Dose (in mg/hr) = 29.937072 mg/hr (rounded to 3 decimal places)
Therefore, the patient should receive a dose of approximately 29.9 mg/hr of dobutamine.
Correct Answer is C
Explanation
To calculate the dose that the child receives, we need to first convert the volume of the suspension from teaspoons to milliliters. One teaspoon is equal to 5 milliliters, so 2 teaspoons is equal to 10 milliliters. Then, we can use the concentration of the suspension to find the amount of cefuroxime in 10 milliliters. The concentration is 25 mg in 2 mL, or 12.5 mg in 1 mL. Therefore, the amount of cefuroxime in 10 mL is:
10 mL × 12.5 mg/mL = 125 mg
Therefore, the child receives 125 mg of cefuroxime once a day orally.
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