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Ati lpn medical calculations exam
Total Questions : 23
Showing 10 questions, Sign in for moreConvert 8 kg to lbs. Round off to the nearest tenth.
Explanation
Here's how to convert 8 kg to pounds:
1. Use the conversion factor: 1 kg = 2.20462 lbs
2. Multiply the kilograms by the conversion factor:
8 kg x 2.20462 lbs/kg = 17.637 lbs
3. Round to the nearest tenth:
17.637 lbs ≈ 17.6 lbs
A nurse is preparing to administer 0.9% sodium chloride (NaCl) 750 mL IV to infuse over 8 hr. 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.)
Explanation
Let's calculate the IV pump rate step-by-step:
1. Determine the infusion rate:
Total volume (mL) / Infusion time (hours) = Infusion rate (mL/hour)
750 mL / 8 hours = 93.75 mL/hour
2. Round to the nearest whole number:
93.75 mL/hour ≈ 94 mL/hour
A nurse is preparing to administer potassium chloride 20 mEq. The amount available is potassium chloride liquid 40 mEq/15 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.)
Explanation
Let's calculate the dosage step-by-step:
1. Determine the concentration of potassium chloride in the liquid:
40 mEq / 15 mL = 2.67 mEq/mL
2. Calculate the volume needed:
20 mEq / 2.67 mEq/mL ≈ 7.5 mL
A nurse is preparing to administer lactated Ringer's solution IV to infuse at 120 mL/hr for a client who has a respiratory disorder. The drop factor on the manual IV tubing is 60 gtt/mL. The nurse should set the IV flow rate to deliver how many gtt/min? (Round to the nearest whole number.)
Explanation
Let's calculate the IV flow rate step-by-step:
Calculate the drops per minute:
Total volume (mL) x Drop factor (gtt/mL) / Infusion time (minutes) = Drops per minute (gtt/min)
120 mL/hour x 60 gtt/mL / 60 minutes/hour = 120 gtt/min
A nurse is preparing to administer dextrose 5% in water (DSW) 200 mL IV to infuse over 24 hr. The drop factor of the manual IV tubing is 15 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Let's calculate the IV flow rate step-by-step:
1. Calculate the total infusion time in minutes:
24 hours x 60 minutes/hour = 1440 minutes
2. Calculate the drops per minute:
Total volume (mL) x Drop factor (gtt/mL) / Infusion time (minutes) = Drops per minute (gtt/min)
1200 mL x 15 gtt/mL / 1440 minutes = 12.5 gtt/min
3. Round to the nearest whole number:
12.5 gtt/min ≈ 13 gtt/min
Convert 300 lbs to kg. Round off to the nearest tenth.
Explanation
Here's how to convert 300 lbs to kilograms:
1. Use the conversion factor: 1 lb = 0.453592 kg
2. Multiply the pounds by the conversion factor:
300 lbs x 0.453592 kg/lb = 136.078 kg
3. Round to the nearest tenth:
136.078 kg ≈ 136.1 kg
A nurse is preparing to administer haloperidol lactate 12 mg PO for a client who has schizophrenia and who cannot swallow tablets. Available is haloperidol 2 mg/mL oral solution. 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.)
Explanation
Let's calculate the dosage step-by-step:
1. Determine the concentration of haloperidol in the solution:
2 mg/mL
2. Calculate the volume needed:
12 mg / 2 mg/mL = 6 mL
Convert 1000mg to g
Explanation
Here's how to convert 1000 mg to grams:
1. Use the conversion factor: 1 gram = 1000 milligrams
2. Divide the milligrams by the conversion factor:
1000 mg / 1000 mg/g = 1 g
A nurse is assisting with care of a client who has a prescription for 3,000 mL of intravenous fluids over the next 24 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round to the nearest whole number)
Explanation
Let's calculate the IV pump rate step-by-step:
Determine the infusion rate:
Total volume (mL) / Infusion time (hours) = Infusion rate (mL/hour)
3000 mL / 24 hours = 125 mL/hour
A nurse is preparing to administer 400 mL of 0.9% sodium chloride IV over 8 hr. The drop factor of the manual IV tubing is 60 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Let's calculate the IV flow rate step-by-step:
1. Calculate the total infusion time in minutes:
8 hours x 60 minutes/hour = 480 minutes
2. Calculate the drops per minute:
Total volume (mL) x Drop factor (gtt/mL) / Infusion time (minutes) = Drops per minute (gtt/min)
400 mL x 60 gtt/mL / 480 minutes = 50 gtt/min
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