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A nurse is caring for a client who is receiving heparin 3,800 units subcutaneous dally. Available is heparin 5,000 units/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth.)
Correct Answer: 0.8 mL
Rationale: To calculate the mL of heparin to administer, use the formula: amount needed (units) / amount per mL (units) = mL to administer. In this case, 3,800 units / 5,000 units/mL = 0.76 mL. Rounded to the nearest tenth, the correct answer is 0.8 mL. Option A is the correct answer because it is the calculated result. Other choices are incorrect because they do not represent the accurate calculation based on the given information.
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A nurse is caring for client who is postoperative following an appendectomy and is prescribed D, lactated Ringer's at 150 mL/hr by continuous IV iinfusion for 12 hr. The drop factor of the manual IV tubing is 20 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.)
Correct Answer: 50 gtt/min
Rationale: To calculate the IV infusion rate in drops per minute (gtt/min), we use the formula: (Volume to be infused in mL) x (Drop factor) / (Time in minutes). In this case, the volume is 150 mL, the drop factor is 20 gtt/mL, and the time is 60 minutes (12 hours x 60 minutes/hour). Plugging in the values: (150 mL) x (20 gtt/mL) / (720 min) = 50 gtt/min. Therefore, the correct answer is 50 gtt/min. This rate ensures the prescribed volume is infused correctly over the specified time.
Incorrect options:
A) Incorrect, as it does not calculate the correct drop rate.
B-G) These options are also incorrect as they do not provide the accurate calculation for the IV infusion rate.
A nurse is preparing to administer 150 mg of an antibiotic IM. Available is 2 g/10 mL. Haw many mi should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 0.8 mL
Rationale: To determine the correct answer, first, convert 150 mg to grams (150 mg = 0.15 g). Then, calculate how many milliliters of the antibiotic contain 0.15 g by setting up a proportion: 2 g is in 10 mL, so 0.15 g is in x mL. Solving for x gives us 0.75 mL. However, since the question asks for the answer rounded to the nearest tenth, the nurse should administer 0.8 mL per dose. The other choices are incorrect because they are not the result of the accurate conversion and calculation process.
A nurse is caring for an infant who weighs 12 lb and is prescribed cefuroxime sodium 15mg/kg PO every 12 hr. Available is cefuroxime sodium oral solution 125mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 3.2 mL
Rationale: To calculate the correct dosage for the infant, we first need to determine the infant's weight in kg. 12 lb is approximately 5.45 kg. Then, we calculate the total dose: 15 mg/kg * 5.45 kg = 81.75 mg per dose. Next, we convert the dose to mL using the concentration of the oral solution: 125 mg/5 mL = 25 mg/mL. Therefore, 81.75 mg ÷ 25 mg/mL = 3.27 mL. Since we need to round to the nearest tenth, the correct answer is 3.2 mL.
Summary:
- Choice A: Incorrect, as it does not follow the correct calculation method.
- Choices B-G: Irrelevant as they do not provide the correct calculation for the dosage.
A nurse is preparing to administer amoxicillin 2 gm/day PO divided into two doses. The amount available is amoxicillin 500 mg tablets. How many tablets should the nurse administer with each dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 2 tablets
Rationale: To administer 2 gm/day of amoxicillin divided into two doses, first, convert 2 gm to mg: 2 gm = 2000 mg. Since each tablet is 500 mg, divide the total dose by the tablet strength: 2000 mg ÷ 500 mg = 4 tablets for the whole day. Divide this by 2 for each dose: 4 tablets ÷ 2 = 2 tablets per dose. Therefore, the correct answer is 2 tablets. Other choices would be incorrect because they do not follow the correct dosage calculation based on the available tablet strength and the prescribed total dose.
A nurse is preparing to titrate morphine 5 mg via tv bolus to a client. The amount available 6 morphine 8 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 0.63 mL
Rationale: To calculate the mL to administer per dose, use the formula: Desired dose (5 mg) / Stock concentration (8 mg/mL) = Volume to administer (X mL). 5 mg / 8 mg/mL = X mL. X = 0.625 mL. Rounding to the nearest hundredth gives 0.63 mL. This ensures accurate dosing. Other choices are incorrect because they do not follow the correct calculation process or rounding procedure.