A physician prescribes Vancomycin 20 mg/kg intravenous (IV). The patient weighs 110 lbs. The medication is available in vials which contain 500 mg per 8 mL. What should the nurse withdraw from the vial? (round to the nearest whole number)
The Correct Answer is ["16"]
To calculate the dosage of Vancomycin, first convert the patient's weight from pounds to kilograms, knowing that 1 kg equals 2.2 lbs. The patient weighs 110 lbs, which is equivalent to 50 kg (110 lbs / 2.2). Next, multiply the patient's weight in kilograms by the prescribed dosage of 20 mg/kg, resulting in a total dosage of 1000 mg (50 kg * 20 mg/kg). Since the vials contain 500 mg per 8 mL, divide the total dosage required by the amount per vial to find out how many milliliters should be withdrawn. This results in 16 mL (1000 mg / (500 mg/8 mL)).
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Naxlex Comprehensive Predictor Exams
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Correct Answer is D
Explanation
A. Anesthetic eye drops can help with pain, but irrigation is the priority to prevent further damage.
B. A visual acuity exam is part of the assessment but should be performed after initial irrigation to prevent further damage.
C. Determining the pH of the chemical splash can guide further treatment but is secondary to immediate irrigation to dilute and remove the chemical.
D. Irrigating both eyes with normal saline is the priority action to dilute and flush out the chemical, reducing the risk of further injury.
Correct Answer is C
Explanation
A. Penicillins are generally safe but are not specific for ototoxicity considerations.
B. Aminoglycosides are avoided in cases of tympanic membrane rupture due to their ototoxic potential, which can lead to hearing loss.
C. Fluoroquinolones, particularly those formulated for otic use, are preferred for tympanic membrane ruptures as they are not ototoxic and are safe for middle ear exposure.
D. Cephalosporins are not typically ototoxic but are less commonly used for tympanic membrane ruptures compared to fluoroquinolones.
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