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A nurse is planning to administer chlorothiazide 20 mg/kg/day PO divided equally and administered twice daily for a toddler who weighs 28.6 lb. How many mL should the nurse administer per dose? (Round to the nearest tenth)
- A. 2.6 mL
- B. 2.2 mL
- C. 3.5 mL
- D. 5.0 mL
Correct Answer: A
Rationale: The correct calculation is as follows: The toddler's weight in kg is 13 kg (28.6 lb / 2.2 lb/kg). The total daily dose is 260 mg (20 mg x 13 kg). Therefore, the dose per administration is 130 mg (260 mg / 2). Given the concentration of 250 mg/5 mL, the dose in mL is 2.6 mL (130 mg / (250 mg/5 mL)). Therefore, the nurse should administer 2.6 mL per dose. Choice B, 2.2 mL, is incorrect as it does not reflect the correct calculation. Choices C and D, 3.5 mL and 5.0 mL, are also incorrect and do not align with the accurate dosage calculation based on the given scenario.
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A nurse is teaching a newly licensed nurse about contraindications to ceftriaxone. The nurse should include a severe allergy to which of the following medications as a contraindication to ceftriaxone?
- A. Gentamicin
- B. Clindamycin
- C. Piperacillin
- D. Sulfamethoxazole-trimethoprim
Correct Answer: C
Rationale: Ceftriaxone is a cephalosporin, and individuals with a penicillin allergy (such as Piperacillin) may have cross-sensitivity, making it contraindicated. Gentamicin (Choice A) belongs to the aminoglycoside class, not related to cephalosporins. Clindamycin (Choice B) is a lincosamide antibiotic and is not typically associated with cross-allergies to cephalosporins. Sulfamethoxazole-trimethoprim (Choice D) is a sulfonamide antibiotic, also not directly related to ceftriaxone.
A healthcare professional is preparing to administer heparin 8,000 units subcutaneously every eight hrs. The amount available is heparin injection 10,000 units/mL. How many milliliters should the healthcare professional administer per dose?
- A. 0.7 mL
- B. 0.8 mL
- C. 1.0 mL
- D. 1.2 mL
Correct Answer: B
Rationale: Calculation: 8000 units / 10,000 units per mL = 0.8 mL. To correctly administer the prescribed dose of 8000 units, the healthcare professional should draw up 0.8 mL from the 10,000 units/mL vial. Options A, C, and D are incorrect as they do not accurately reflect the calculation based on the available concentration of heparin.
A nurse in an outpatient facility is assessing a client who is prescribed furosemide 40 mg daily, but the client reports she has been taking extra doses to promote weight loss. Which of the following findings indicates she is dehydrated?
- A. Urine specific gravity of 1.020
- B. Urine specific gravity of 1.035
- C. Decreased skin turgor
- D. Decreased heart rate
Correct Answer: B
Rationale: The correct answer is B. A urine specific gravity greater than 1.030 is indicative of dehydration as it reflects concentrated urine. Choice A is incorrect as a specific gravity of 1.020 is within the normal range. Choice C, decreased skin turgor, can be a sign of dehydration but is not as specific as urine specific gravity. Choice D, decreased heart rate, is not typically a direct indicator of dehydration.
A nurse is preparing to administer furosemide 4 mg/kg/day PO divided into 2 equal doses daily to a toddler who weighs 22 lb. How many mg should the nurse administer per dose?
- A. 10 mg
- B. 20 mg
- C. 30 mg
- D. 40 mg
Correct Answer: B
Rationale: To calculate the correct dose, first, convert the toddler's weight from pounds to kilograms: 22 lb / 2.2 lb/kg = 10 kg. Next, multiply the weight in kilograms by the dosage: 4 mg/kg x 10 kg = 40 mg/day. Since the total daily dose is divided into 2 equal doses, each dose would be 20 mg. Therefore, the correct answer is 20 mg. Choice A (10 mg) is incorrect because it does not account for the correct weight-based dosage. Choice C (30 mg) and Choice D (40 mg) are incorrect as they do not correctly calculate the dose based on the weight of the toddler and the prescribed dosage per kg.
A nurse is caring for a client who is receiving IV diltiazem for atrial fibrillation. Which of the following findings is a contraindication to the administration of diltiazem?
- A. Hypotension
- B. Tachycardia
- C. Decreased level of consciousness
- D. History of diuretic use
Correct Answer: A
Rationale: The correct answer is A: Hypotension. Diltiazem can cause further lowering of blood pressure, so it should not be administered if the client is already hypotensive. Monitoring blood pressure is crucial before giving diltiazem. Choice B, tachycardia, is not a contraindication for diltiazem use; in fact, diltiazem is used to slow down the heart rate. Choice C, decreased level of consciousness, may indicate other issues but is not a direct contraindication for diltiazem. Choice D, history of diuretic use, is not a contraindication by itself; however, caution should be exercised when diltiazem is given with diuretics due to potential interactions.