how are type iv hypersensitivity reactions different from all other types i ii or iii of hypersensitivity reactions
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Medical Surgical Assignment Exam HESI Quizlet

1. How are type IV hypersensitivity reactions different from all other types (I, II, or III) of hypersensitivity reactions?

Correct answer: B

Rationale: Type IV hypersensitivity reactions are mediated by T cells and cytokine release, leading to delayed reactions, unlike types I, II, and III, which involve antibodies. Choice A is incorrect because type IV reactions do not involve antigen-antibody complexes. Choice C is incorrect as type IV reactions do not result in immediate allergic reactions. Choice D is incorrect as type IV reactions are not the least severe form of hypersensitivity; in fact, they are known to cause significant tissue damage and inflammation.

2. The healthcare provider prescribes the nonsteroidal anti-inflammatory drug (NSAID) naproxen (Naprosyn) 500 mg PO twice a day for a client with osteoarthritis. During a follow-up visit one month later, the client tells the nurse, 'The pills don't seem to be working. They are not helping the pain at all.' Which factor should influence the nurse’s response?

Correct answer: D

Rationale: The correct answer is D. NSAID response can vary among individuals, and sometimes a different NSAID may be more effective for a specific client. In this case, since the current NSAID (naproxen) is not providing pain relief, it is reasonable to consider switching to another NSAID. Choice A is incorrect because there is no information provided to suggest noncompliance. Choice B is incorrect as increasing the dosage without assessing the response may lead to unnecessary side effects. Choice C is incorrect because although it may take time for NSAIDs to reach therapeutic levels, lack of pain relief after a month is a valid reason to consider changing the medication rather than waiting longer.

3. Which nursing diagnosis should be selected for a client who is receiving thrombolytic infusions for treatment of an acute myocardial infarction?

Correct answer: D

Rationale: Thrombolytic therapy increases the risk of bleeding, not infection, fluid volume deficit, or impaired skin integrity. The most significant concern with thrombolytic therapy is the potential for bleeding complications, which can lead to various injuries. Therefore, 'Risk for injury related to effects of thrombolysis' is the most appropriate nursing diagnosis in this scenario. Choices A, B, and C are incorrect as they do not directly correlate with the primary risk associated with thrombolytic therapy.

4. Which pathology is associated with an asthma condition?

Correct answer: B

Rationale: The correct answer is B: Recurrent spasms of the airways accompanied by edema and mucus production. Asthma is characterized by bronchospasms, inflammation, swelling of the airways, and increased mucus production. This leads to airway constriction, making it difficult to breathe. Choices A, C, and D do not represent the typical pathology seen in asthma. Chronic dilation and inflammation of the bronchi (Choice A) is more characteristic of bronchiectasis, progressive loss of lung function due to destruction of alveolar walls (Choice C) is seen in conditions like emphysema, and infection of the lung parenchyma (Choice D) is more related to conditions like pneumonia.

5. Which nursing intervention is most important for the nurse to implement when caring for an older client who is legally blind?

Correct answer: B

Rationale: The correct answer is to speak to the client each time the nurse enters the room. This intervention is crucial for orienting and reassuring the client, promoting safety, and facilitating communication. Keeping the room well-lit (Choice A) can be helpful but is not as essential as direct verbal communication. Ensuring the client wears glasses (Choice C) may not be feasible or necessary for someone who is legally blind. Providing written instructions in large print (Choice D) is not effective for a client with visual impairments.

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