the nurse is teaching a nursing student about the minimal effective concentration mec of antibiotics which statement by the nursing student indicates
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HESI RN

HESI Medical Surgical Practice Quiz

1. 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.

2. When giving a report about a client who had a gastrectomy from the intensive care unit to the post-surgical unit nurse, what is the most effective way to assure essential information is reported?

Correct answer: C

Rationale: Using a printed checklist with individualized information is the most effective way to ensure that all key details about the client who had a gastrectomy are covered during the report. This method helps in structuring the information systematically, reducing the risk of missing important details. Face-to-face communication in a quiet room (Choice A) is important for effective communication but may not guarantee the coverage of all essential information. Audiotaping the report (Choice B) may not be practical for immediate reference or interaction. Documenting in the electronic health record (Choice D) is essential but may not facilitate a comprehensive real-time exchange of information between the nurses.

3. Which of the following is a common cause of chronic liver disease?

Correct answer: B

Rationale: Hepatitis C infection is a common cause of chronic liver disease due to its long-term effects on the liver. Hepatitis C can lead to liver inflammation, fibrosis, cirrhosis, and even liver cancer. Alcohol abuse can also cause liver damage, but hepatitis C infection is specifically known for its chronic impact on liver health. Obesity and smoking, while detrimental to overall health, are not typically direct causes of chronic liver disease like hepatitis C infection.

4. Which symptoms should the nurse expect a client to exhibit who is diagnosed with a pheochromocytoma?

Correct answer: B

Rationale: Correct. Pheochromocytoma is a catecholamine-secreting non-cancerous tumor of the adrenal medulla. The classic triad of symptoms includes headache, diaphoresis (excessive sweating), and palpitations, which result from the overproduction of catecholamines like epinephrine and norepinephrine. Numbness, tingling, and cramps in the extremities (Option A) are not characteristic of pheochromocytoma. Cyanosis, fever, and classic signs of shock (Option C) are not typical symptoms of this condition. Nausea, vomiting, and muscular weakness (Option D) are not commonly associated with pheochromocytoma.

5. A client with chronic kidney disease (CKD) is experiencing nausea, vomiting, visual changes, and anorexia. Which action by the nurse is best?

Correct answer: A

Rationale: In a client with chronic kidney disease experiencing symptoms like nausea, vomiting, visual changes, and anorexia, it is crucial for the nurse to suspect digoxin (Lanoxin) toxicity. These symptoms are indicative of digoxin toxicity. Therefore, the best action for the nurse to take is to check the client's digoxin level. Administering anti-nausea medication, asking about eating crackers, and referring to a gastrointestinal specialist may help with symptom management but do not address the underlying cause of the symptoms, which is digoxin toxicity in this case.

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