the measure of the number of existing cases of a disease in a specific population at a given time is called
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Community Health HESI Practice Questions

1. What is the measure of the number of existing cases of a disease in a specific population at a given time?

Correct answer: B

Rationale: Prevalence is the correct answer as it refers to the number of existing cases of a disease in a specific population at a given time. Incidence, on the other hand, refers to the number of new cases of a disease in a defined population over a specific period. Mortality rate is the measure of the number of deaths in a particular population due to a specific cause, while morbidity rate is the frequency of a disease in a specific population.

2. A 4-month-old child taking digoxin (Lanoxin) has a blood pressure of 92/78; resting pulse of 78; respirations 28, and a potassium level of 4.8 mEq/L. The client is irritable and has vomited twice since the morning dose of digoxin. Which finding is most indicative of digoxin toxicity?

Correct answer: A

Rationale: Bradycardia (abnormally slow heart rate) is a key sign of digoxin toxicity. In this scenario, the child's symptoms of irritability, vomiting, along with the resting pulse of 78 despite being on digoxin, suggest an impending bradycardia due to digoxin toxicity. Lethargy can also be a sign, but in this case, the child is irritable rather than lethargic. Vomiting, though a symptom, is not as specific to digoxin toxicity as bradycardia. Irritability, while present, is not the most indicative finding of digoxin toxicity compared to bradycardia.

3. The public health RN is called to investigate a report of several cases of varicella at a daycare center. The daycare workers state that 5 children have been sent home over the past 2 weeks with fever and itchy blisters. Which intervention should the RN implement first?

Correct answer: A

Rationale: The correct answer is to validate that the children who were sent home had chickenpox. This is crucial in confirming the presence of varicella, which is necessary for appropriate management and control of the outbreak. Option B is not the first intervention because the focus initially is on verifying the cases within the daycare center. Option C is incorrect as it suggests a prolonged exclusion period without confirming the diagnosis. Option D is inappropriate and potentially harmful, as sending a child back without proper assessment can lead to further spread of the infection.

4. At a routine health assessment, a client tells the nurse that she is planning a pregnancy in the near future. She asks about preconception diet changes. Which of the statements made by the nurse is best?

Correct answer: B

Rationale: The correct answer is B: "Increase green leafy vegetable intake." This is the best advice because green leafy vegetables are rich in folic acid, which is essential for fetal development and helps prevent neural tube defects. Choice A is not specific enough and does not address the importance of folic acid. Choice C, drinking milk with each meal, does not provide the necessary folic acid intake. Choice D, eating fish weekly, is not as crucial for preconception diet changes as increasing folic acid intake.

5. Refers to the nurses in the local/national health departments or public schools:

Correct answer: B

Rationale: The correct term for nurses working in local/national health departments or public schools is 'public health nurse.' This term specifically refers to individual nurses in those settings. Choice A, 'Public health nursing,' is a broader term that refers to the field of nursing focused on improving community health. Choices C and D, 'Registered midwives' and 'Registered nurses,' do not specifically indicate the nurses working in local/national health departments or public schools, making them incorrect.

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