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. An example of secondary prevention strategy would be:

Correct answer: A

Rationale: The correct answer is A. Screening for breast cancer is a secondary prevention strategy aimed at early detection, which falls under secondary prevention as it focuses on early identification and intervention before the disease progresses. Choice B is incorrect as it refers to palliative care for symptom management in terminal cancer patients, which is not a secondary prevention strategy. Choice C is incorrect as educating teenagers about condom use is a primary prevention strategy to prevent the initial occurrence of STDs rather than intervening after exposure, making it a primary, not a secondary prevention strategy. Choice D is incorrect as there is a valid example of a secondary prevention strategy provided in choice A.

3. The nurse is assessing a 12-year-old who has Hemophilia A. Which finding would the nurse anticipate?

Correct answer: C

Rationale: The correct answer is C: A deficiency of clotting factor VIII. Hemophilia A is characterized by a lack of clotting factor VIII, which is crucial for blood clotting. This deficiency results in prolonged bleeding. Choices A, B, and D are incorrect. There is no association between Hemophilia A and an excess of red blood cells (Choice A) or an excess of white blood cells (Choice B). Additionally, Hemophilia A specifically involves a deficiency of clotting factor VIII, not both factors VIII and IX (Choice D).

4. The nurse uses the DRG (Diagnosis Related Group) manual to

Correct answer: C

Rationale: The DRG manual is used to determine the reimbursement rate for medical diagnoses and treatments under the prospective payment system used by healthcare facilities. Choice A is incorrect because the DRG manual is not used to classify nursing diagnoses, but rather to group medical diagnoses for billing purposes. Choice B is incorrect as the DRG manual is not used to identify findings related to medical diagnoses, but rather to standardize payments for medical services. Choice D is incorrect as the DRG manual is not used to implement nursing care based on case management protocol, but rather to set reimbursement rates.

5. The client with acute hypocalcemia is admitted to the unit. Nursing action should include:

Correct answer: A

Rationale: The correct action for a client with acute hypocalcemia is to implement seizure precautions. Hypocalcemia can lead to tetany and seizures due to neuromuscular irritability. Assessing for hypoglycemia (choice B) is not directly related to hypocalcemia. Monitoring for visual changes (choice C) is more indicative of conditions like hyperglycemia or retinal disorders. Observing for muscle weakness (choice D) is a common symptom of hypocalcemia but does not address the immediate risk of seizures, which is why implementing seizure precautions is the priority nursing action.

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