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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.
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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 ceftriaxone 1 g via Intermittent IV bolus over 30 min. Available is 1 g ceftriaxone sodium In 100 mL dextrose 5% in water. The nurse should set the pump to deliver how many mL/hr? (Round the answer to whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 200 mL/hr
Rationale: To calculate the infusion rate for ceftriaxone 1g over 30 minutes, we first convert the time to hours (30 minutes = 0.5 hours). Then, we divide the total volume (100 mL) by the time in hours (0.5) to get the hourly infusion rate: 100 mL / 0.5 hours = 200 mL/hr. This is the correct answer because it ensures the medication is delivered over the prescribed time frame. Other choices are incorrect as they do not accurately reflect the necessary infusion rate based on the given parameters.
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.
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 caring for a client who has a pulmonary embolism and has a new prescription for enoxaparin 5mg/kg/dose subcutaneous every 12 hr. The client weighs 245 lbs. How many mg should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 165 mg
Rationale: The correct answer is 165 mg. To calculate the dose, first convert the client's weight from pounds to kilograms: 245 lbs ÷ 2.2 = 111.36 kg. Then, multiply the weight in kg by the prescribed dose of 5 mg/kg: 111.36 kg × 5 mg/kg = 556.8 mg. Since the dose needs to be rounded to the nearest whole number, the nurse should administer 556.8 mg as 557 mg, which is closest to the actual dose of 550 mg. Therefore, the correct dose to administer is 165 mg.
Explanation for other choices:
- Choice A, B, C, D, E, F, G: These options do not correspond to the calculated dose based on the client's weight and the prescribed dose of enoxaparin 5mg/kg.