A nurse is caring for a client who has myasthenia gravis. The nurse should recognize that this disease is caused by which of the following types of hypersensitivities?

Delayed

Immediate

Immune complex-mediated

Cytotoxic

Answer and Explanation

The Correct Answer is D

Cytotoxic hypersensitivity is a type of hypersensitivity that involves the production of IgG or IgM antibodies that bind to antigens on the surface of cells, leading to cell destruction by complement activation or antibody-dependent cellular cytotoxicity. Myasthenia gravis is an example of a cytotoxic hypersensitivity, as it is caused by autoantibodies that target the acetylcholine receptors on the muscle cells, impairing neuromuscular transmission and causing muscle weakness.

Delayed hypersensitivity is a type of hypersensitivity that involves the activation of T cells and macrophages, leading to inﬂammation and tissue damage after several hours or days of exposure to an antigen. Examples of delayed hypersensitivity include contact dermatitis, tuberculin skin test, and transplant rejection.

Immediate hypersensitivity is a type of hypersensitivity that involves the production of IgE antibodies that bind to mast cells or basophils, leading to degranulation and release of histamine and other mediators, causing anaphylaxis, urticaria, or allergic rhinitis within minutes of exposure to an antigen.

Immune complex-mediated hypersensitivity is a type of hypersensitivity that involves the formation of antigen- antibody complexes that deposit in tissues or blood vessels, leading to complement activation and inﬂammation, causing vasculitis, glomerulonephritis, or serum sickness within hours or days of exposure to an antigen.

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Correct Answer is A

No explanation

A. Ask the client if any other foods cause such a reaction. B. Notify the provider of the client's allergy. C. Notify the dietary department of the client's allergy. D. Atach a wrist band indicating the client's allergy.

Correct Answer is B

Explanation

The priority nursing action is to notify the provider of the client's allergy because shellfish allergy may indicate an allergy to iodine, which is commonly used as a contrast dye in cardiac catheterization. This could cause a severe allergic reaction or anaphylaxis during the procedure, which could be life-threatening. The provider may need to order a diﬀerent type of contrast dye or premedicate the client with antihistamines or steroids to prevent an allergic reaction.

a. Ask the client if any other foods cause such a reaction is wrong because it is not the priority action and it does not address the potential risk of iodine allergy.

c. Notify the dietary department of the client's allergy is wrong because it is not relevant to the cardiac catheterization and it does not prevent an allergic reaction during the procedure.

d. Atach a wrist band indicating the client's allergy is wrong because it is not sufficient to alert the provider or the catheterization team of the client's allergy and it does not prevent an allergic reaction during the procedure.

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A nurse is caring for a client who has myasthenia gravis. The nurse should recognize that this disease is caused by which of the following types of hypersensitivities?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is assessing a client who has right-sided heart failure. Which of the following findings should the nurse expect?

Correct Answer is A

The nurse asks a client who is about to have a cardiac catheterization about any allergies. The client states, "I always get a rash when I eat shellfish." Which of the following is the priority nursing action?

Correct Answer is B

Explanation

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