the term epidemiology is best defined as the study of
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HESI LPN

Community Health HESI Practice Exam

1. The term 'epidemiology' is best defined as the study of:

Correct answer: B

Rationale: Epidemiology is the study of the distribution and determinants of health-related states in populations. Choice A is incorrect because epidemiology focuses on more than just causes but also on distribution and determinants. Choice C is incorrect as it specifically relates to public health and not just treatment and prevention. Choice D is incorrect as epidemiology is broader than just focusing on the healthcare system and its effectiveness.

2. The occurrence of non-communicable diseases (NCDs) is on the rise and is attributed to the changing lifestyle of Filipinos. The major NCDs are cardiovascular diseases (CVDs), cancer, chronic obstructive pulmonary disease (COPD), and diabetes mellitus (DM). The community health nurse can help address these problems. The major risk factors common to the above-mentioned four major NCDs are:

Correct answer: A

Rationale: The correct answer is A: 'Unhealthy diet, physical inactivity, and smoking.' These are major risk factors associated with cardiovascular diseases (CVDs), cancer, chronic obstructive pulmonary disease (COPD), and diabetes mellitus (DM). Unhealthy diet can lead to obesity and other health issues, physical inactivity contributes to various chronic conditions, and smoking is a well-known risk factor for cancer and respiratory diseases. Choice B is incorrect as hypertension is a condition that can result from these risk factors rather than being a risk factor itself. Poor stress management, although important for overall health, is not a major risk factor for the mentioned NCDs. Choice C is incorrect as although obesity is a risk factor, it is not mentioned in the question stem. Choice D is incorrect as alcoholism is not listed among the major NCDs or the common risk factors provided.

3. When the nurse identifies what appears to be ventricular tachycardia on the cardiac monitor of a client being evaluated for possible myocardial infarction, the first action the nurse should perform is to

Correct answer: D

Rationale: The correct first action for the nurse to take when identifying what appears to be ventricular tachycardia in a client being evaluated for possible myocardial infarction is to assess the client's airway, breathing, and circulation. This step is crucial to determine the client's stability and the need for immediate intervention. Beginning cardiopulmonary resuscitation or preparing for immediate defibrillation without first assessing the airway, breathing, and circulation could delay potentially life-saving interventions. Notifying the 'Code' team and healthcare provider should come after ensuring the client's immediate needs are addressed.

4. A client is admitted with the diagnosis of myocardial infarction (MI). Which of the following lab values would be consistent with this diagnosis?

Correct answer: D

Rationale: The correct answer is D: Elevated creatinine phosphokinase (CPK). Elevated CPK levels indicate muscle damage, including damage to the cardiac muscle, which aligns with the diagnosis of myocardial infarction. Choice A, low serum albumin, is not directly related to myocardial infarction. Choice B, high serum cholesterol, is more associated with conditions like atherosclerosis rather than acute myocardial infarction. Choice C, abnormally low white blood cell count, is typically not a lab value associated with myocardial infarction; instead, it could suggest other conditions like infections or bone marrow issues.

5. A young child is admitted for treatment of lead poisoning. The nurse recognizes that the most serious effect of chronic lead poisoning is

Correct answer: A

Rationale: Corrected Rationale: Chronic lead poisoning can lead to severe and irreversible damage to the central nervous system, including cognitive and developmental delays. Central nervous system damage is the most serious effect of chronic lead poisoning because it can have long-lasting consequences on a child's cognitive function and overall development. Moderate anemia (Choice B), renal tubule damage (Choice C), and growth impairment (Choice D) can also occur due to lead poisoning, but they are not as severe or potentially irreversible as the damage to the central nervous system.

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