HESI RN
HESI Medical Surgical Practice Quiz Questions
Question 1 of 5
The nurse is teaching a nursing student about the minimal effective concentration (MEC) of antibiotics. Which statement by the nursing student indicates understanding of this concept?
Correct Answer: C
Rationale: The MEC is the minimum amount of drug needed to halt the growth of a microorganism. A level greater than the MEC helps eradicate infections. Drugs at or above the MEC are usually bactericidal, not bacteriostatic. Therefore, choice A is incorrect. Broadening the spectrum of a drug refers to its range of activity against different microorganisms, which is not directly related to MEC. Thus, choice B is incorrect. Increasing the therapeutic index involves maximizing the effectiveness of a drug while minimizing its toxicity, which is not specifically related to MEC. Therefore, choice D is also incorrect.
Question 2 of 5
The patient will take a high dose of azithromycin after discharge from the hospital. Which statement by the patient indicates understanding of the teaching?
Correct Answer: A
Rationale: The correct answer is A. Azithromycin peak levels may be reduced by antacids when taken at the same time, so patients should be cautioned to take antacids 2 hours before or 2 hours after taking the drug. Choice B is incorrect because high-dose azithromycin carries a risk for hepatotoxicity when taken with other potentially hepatotoxic drugs such as acetaminophen. Choice C is incorrect as diarrhea may indicate pseudomembranous colitis and should be reported, not expected as a common mild side effect. Choice D is incorrect; there is no restriction for dairy products while taking azithromycin.
Question 3 of 5
The healthcare provider is caring for a 7-year-old patient who will receive oral antibiotics. Which antibiotic order will the healthcare provider question for this patient?
Correct Answer: D
Rationale: The correct answer is D, Tetracycline (Sumycin). Tetracyclines should not be given to children younger than 8 years of age because they irreversibly discolor the permanent teeth. Azithromycin, Clarithromycin, and Clindamycin are antibiotics that are generally safe for use in children and do not have the same tooth discoloration side effect as Tetracycline. Therefore, these antibiotics would be more appropriate choices for a 7-year-old patient.
Question 4 of 5
The healthcare professional is reviewing a patient's chart prior to administering gentamicin (Garamycin) and notes that the last serum peak drug level was 9 mcg/mL and the last trough level was 2 mcg/mL. What action will the healthcare professional take?
Correct Answer: C
Rationale: Gentamicin peak levels should ideally be between 5 to 8 mcg/mL, and trough levels should be within the range of 0.5 to 2 mcg/mL to ensure therapeutic efficacy while minimizing toxicity risk. In this case, the patient's peak level is above the recommended range, and the trough level is at the higher end, indicating potential drug toxicity. Therefore, the correct action for the healthcare professional is to report the possibility of drug toxicity to the patient's healthcare provider. Administering the next dose as prescribed (Choice A) would exacerbate the toxicity risk. Obtaining repeat peak and trough levels (Choice B) may confirm the current levels but does not address the immediate concern of potential toxicity. Reporting a decreased drug therapeutic level (Choice D) is not the priority in this scenario, as the focus should be on addressing the potential toxicity issue.
Question 5 of 5
The nurse is preparing to administer doses of hydrochlorothiazide (HydroDIURIL) and digoxin (Lanoxin) to a patient who has heart failure. The patient reports having blurred vision. The nurse notes a heart rate of 60 beats per minute and a blood pressure of 140/78 mm Hg. Which action will the nurse take?
Correct Answer: C
Rationale: In this scenario, the patient is experiencing symptoms of digoxin toxicity, such as blurred vision and bradycardia. When thiazide diuretics like hydrochlorothiazide are taken with digoxin, the patient is at risk of digoxin toxicity due to the potential for thiazides to cause hypokalemia. Therefore, the correct action for the nurse to take is to hold the digoxin and notify the provider. Administering the medications without addressing the potential toxicity could worsen the patient's condition. Requesting serum electrolytes (Choice A) may be necessary but holding the digoxin takes priority. Evaluating serum blood glucose (Choice B) is not relevant to the current situation. Holding hydrochlorothiazide (Choice D) is not the best option as the primary concern is the digoxin toxicity that needs to be addressed promptly.