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Hesi rn dosage calculation
Total Questions : 40
Showing 10 questions, Sign in for moreThe healthcare provider prescribes one liter of 1/4 strength saline in 5% dextrose solution (D5 1/4 NS) to infuse at a keep-open rate over 24 hours. The IV administration set delivers 15 gtt/mL. The nurse should regulate the infusion pump to deliver how many mL/hr? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
Explanation
Calculation:
Convert liters to milliliters:
1 liter (L) = 1000 milliliters (mL)
Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Total volume (mL) / Total time (hours)
= 1000 mL / 24 hours
= 41.67 mL/hr
Round to the nearest whole number:
= 42 mL/hr
The nurse is preparing to administer enoxaparin 90 mg SUBQ daily to a client admitted with a pulmonary embolism. The pharmacy provides a prefilled syringe labeled, “Enoxaparin 100 mg/1 mL.” How many mL should the nurse administer? (Enter numeric value only.)
Explanation
Calculation:
Identify the desired dose:
Desired dose = 90 mg
Identify the available concentration:
Available concentration = 100 mg / 1 mL
Calculate the volume to administer:
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 90 mg / 100 mg/mL
= 0.9 mL
The nurse is preparing a change of shift report for a client who has an IV infusion of 1000 mL of 0.9% sodium chloride. The infusion was started 5 hours ago at a rate of 125 mL/hour via an infusion pump. The nurse should report how many mL remain to be infused to the oncoming nurse? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
Explanation
Calculation:
Calculate the total volume infused:
Volume infused (mL) = Infusion rate (mL/hr) x Time (hours)
= 125 mL/hr x 5 hours
= 625 mL
Calculate the remaining volume to be infused:
Remaining volume (mL) = Total volume (mL) - Volume infused (mL)
= 1000 mL - 625 mL
= 375 mL
A client is receiving phenytoin 0.2 gram PO twice daily. The medication is available in 100 mg capsules. How many capsules should the nurse administer? (Enter numeric value only.)
Explanation
Calculation:
Desired dose = 0.2 gram
Available dose per capsule = 100 mg per capsule
Ensure the units are the same:
Convert grams to milligrams:
0.2 g x 1000 mg/g = 200 mg
Calculate the number of capsules:
Number of capsules = Desired dose (mg) / Available dose per capsule (mg/capsule)
= 200 mg / 100 mg/capsule
= 2 capsules
A client is receiving a secondary IV infusion of potassium chloride (KCl) 30 mEq at a rate of 10 mEq an hour. The pharmacy dispenses a 100 mL of 0.9% normal saline (NS) containing KCl 30 mEq. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
Explanation
Calculation:
Total amount of KCl to be infused: 30 mEq
Rate of KCl infusion: 10 mEq/hour
Determine the total infusion time in hours:
Total infusion time (hours) = Total KCl (mEq) / KCl infusion rate (mEq/hour)
= 30 mEq / 10 mEq/hour
= 3 hours
Calculate the infusion rate in mL/hour:
Infusion rate (mL/hour) = Total volume (mL) / Total infusion time (hours)
= 100 mL / 3 hours
≈ 33.33 mL/hour
Round to the nearest whole number:
= 33 mL/hour
The healthcare provider (HCP) prescribes lorazepam 50 mcg/kg IM two hours before a scheduled procedure for a client who weighs 74 kg. The medication is available as "Lorazepam 2 mg/mL vial." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
Explanation
Calculation:
Calculate the prescribed dose in micrograms:
Dose (mcg) = Prescribed dose (mcg/kg) x Client's weight (kg)
= 50 mcg/kg x 74 kg
= 3700 mcg
Convert the dose from micrograms to milligrams:
Dose (mg) = Dose (mcg) / 1000 mcg/mg
= 3700 mcg / 1000 mcg/mg
= 3.7 mg
Calculate the volume to administer in mL:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 3.7 mg / 2 mg/mL
= 1.85 mL
Round to the nearest tenth:
Rounded volume = 1.9 mL
The healthcare provider prescribes ganciclovir 375 mg IV every 12 hour to infuse over 90 minutes. The pharmacy delivers ganciclovir 375 mg in a 150 mL IV bag. How many drops/minute should the nurse regulate the gravity infusion using a drip chamber that delivers 10 drops/mL? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
Explanation
Calculation:
Total volume to be infused = 150 mL
Infusion time in minutes = 90 minutes
Drop factor of the IV tubing = 10 drops/mL
Calculate the total number of drops to be infused:
Total drops = Total volume (mL) x Drop factor (drops/mL)
= 150 mL x 10 drops/mL
= 1500 drops
Calculate the infusion rate in drops per minute (drops/minute):
Infusion rate (drops/minute) = Total drops / Infusion time (minutes)
= 1500 drops / 90 minutes
≈ 16.67 drops/minute
Round to the nearest whole number:
= 17 drops/minute
A client with cachexia is receiving 3/4 strength of a liquid nutritional supplement 360 mL every 6 hours via nasogastric tube. Full strength of the nutritional supplement is available in a 240 mL can. How many mL of the nutritional supplement should the nurse use to prepare the feeding? (Enter numerical value only. If rounding is required, round to nearest whole number if needed.)
Explanation
Calculation:
First, determine the volume of the full strength supplement needed for one feeding if it were given at full strength:
Full strength volume = 360 mL
Calculate the volume of the full strength supplement needed to prepare a 3/4 strength feeding:
Volume of full strength supplement = (Fraction of strength) x (Total volume of feeding)
= (3/4) x 360 mL
= 0.75 x 360 mL
= 270 mL
Therefore, the nurse should use 270 mL of the full strength nutritional supplement to prepare the feeding.
The healthcare provider prescribes filgrastim 410 mcg SUBQ every day for a client post bone marrow transplant. The medication available dose is, "Filgrastim 600 mcg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth).
Explanation
Calculation:
Desired dose = 410 mcg
Available concentration = 600 mcg/mL
Calculate the volume to administer:
Volume to administer (mL) = Desired dose (mcg) / Available concentration (mcg/mL)
= 410 mcg / 600 mcg/mL
≈ 0.6833 mL
Round to the nearest tenth:
Rounded volume = 0.7 mL
A client receives a prescription for lactated Ringer’s 2 liters IV to be infused over 20 hours. How many mL should the nurse program the infusion pump to deliver? (Enter numerical value only.)
Explanation
Calculation:
Convert the total volume from liters to milliliters:
Total volume (mL) = Total volume (liters) x 1000 mL/liter
= 2 liters x 1000 mL/liter
= 2000 mL
Total infusion time in hours = 20 hours
Calculate the infusion rate in mL per hour:
Infusion rate (mL/hour) = Total volume (mL) / Total infusion time (hours)
= 2000 mL / 20 hours
= 100 mL/hour
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