A teenage client is admitted to the emergency department following a bee sting. The client arrives with a body rash and 30 minutes later becomes short of breath.
The client's vital signs are a heart rate of 130 beats/minute, respirations of 40 breaths/minute, and a blood pressure of 90/52 mm Hg. The client is exhibiting clinical manifestations of which type of immune reaction?
Autoimmune response.
Type II hypersensitivity.
Cell-mediated hypersensitivity.
IgE response hypersensitivity.
The Correct Answer is D
Choice A rationale:
Autoimmune responses occur when the immune system mistakenly attacks the body's own tissues. They are not typically triggered by allergens like bee stings.
Autoimmune responses often develop slowly over time and present with symptoms related to the specific tissues being attacked.
The rapid onset of symptoms in this case, along with the specific symptoms of rash, shortness of breath, and low blood pressure, are not characteristic of an autoimmune response.
Choice B rationale:
Type II hypersensitivity reactions involve antibodies that target and destroy cells or tissues. These reactions often take hours or days to develop, rather than minutes.
Examples of type II hypersensitivity reactions include transfusion reactions, hemolytic disease of the newborn, and some autoimmune diseases.
The rapid onset of symptoms in this case is not consistent with a type II hypersensitivity reaction.
Choice C rationale:
Cell-mediated hypersensitivity reactions involve T cells that directly attack cells or tissues. These reactions typically take 1-3 days to develop.
Examples of cell-mediated hypersensitivity reactions include contact dermatitis (e.g., poison ivy), graft-versus-host disease, and some drug reactions.
The rapid onset of symptoms in this case, as well as the specific symptoms of rash, shortness of breath, and low blood pressure, are not characteristic of a cell-mediated hypersensitivity reaction.
Choice D rationale:
IgE response hypersensitivity reactions are the most immediate type of allergic reaction.
They are mediated by immunoglobulin E (IgE) antibodies, which bind to mast cells and basophils.
When an allergen (like bee venom) cross-links IgE antibodies on mast cells, it triggers the release of histamine and other inflammatory mediators.
These mediators cause vasodilation, increased vascular permeability, smooth muscle contraction, and mucus secretion, leading to the characteristic symptoms of an allergic reaction.
The rapid onset of symptoms in this case, including rash, shortness of breath, and low blood pressure, are consistent with an IgE-mediated hypersensitivity reaction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Colloidal oatmeal-based lotions can be soothing and moisturizing for dry, itchy skin, but they are not effective in treating the inflammation and scaling associated with psoriasis.
They do not address the underlying hyperproliferation of skin cells that is characteristic of psoriasis.
While they may provide temporary relief of symptoms, they are not a long-term solution for managing the condition.
Choice B rationale:
Topical corticosteroids are the mainstay of treatment for psoriasis.
They work by reducing inflammation, slowing the growth of skin cells, and easing itching and scaling. They come in a variety of strengths and formulations, including creams, ointments, gels, and foams.
The type of corticosteroid and the strength of the medication will depend on the severity of the psoriasis and the location of the lesions.
It's important to follow the healthcare provider's instructions for use carefully, as overuse of topical corticosteroids can lead to side effects such as thinning of the skin and rebound flares.
Choice C rationale:
Topical analgesics, such as lidocaine or benzocaine, can be used to temporarily relieve pain and itching associated with psoriasis.
However, they do not address the underlying inflammation and scaling, and they should not be used as a primary treatment for the condition.
They may be used as adjunctive therapy in conjunction with topical corticosteroids or other psoriasis medications.
Choice D rationale:
Topical antifungal medications are used to treat fungal infections of the skin, such as athlete's foot or ringworm. They are not effective in treating psoriasis, which is an autoimmune condition rather than a fungal infection.
Using a topical antifungal medication for psoriasis could potentially worsen the condition or lead to other skin problems.
Correct Answer is D
Explanation
Choice D rationale:
Highlights daily use: Tiotropium is a long-acting bronchodilator, meaning it works to relax and open the airways over an extended period. It's crucial for managing COPD symptoms and preventing exacerbations. Daily use is essential to maintain its effectiveness.
Emphasizes the Handihaler: The Handihaler is the specific inhalation device designed for tiotropium delivery. It ensures proper medication administration and optimal lung deposition.
Demonstrates understanding of instructions: Choosing this option indicates the client has correctly grasped the intended frequency and method of use.
Choice A rationale:
Misunderstanding of purpose: Tiotropium is not a rescue inhaler for sudden shortness of breath. It's a maintenance medication that works gradually to improve lung function. For acute symptoms, a short-acting bronchodilator, like albuterol, is required.
Potential delay in appropriate treatment: Reliance on tiotropium for acute episodes could lead to delayed use of the correct rescue medication, potentially worsening symptoms and increasing risks.
Choice B rationale:
Potential side effect, not primary goal: While tiotropium may reduce sputum thickness in some individuals, it's not the primary aim of therapy. Focusing on this aspect could overlook its broader benefits in managing COPD.
Variable response: The extent of sputum thinning varies among individuals and shouldn't be the sole indicator of effectiveness.
Choice C rationale:
Potential for overmedication: Using multiple inhalers without clear guidance from a healthcare provider could increase the risk of excessive medication and adverse effects.
Importance of individualized regimens: Inhaler use depends on the specific medications prescribed and the severity of COPD. Healthcare professionals tailor regimens to individual needs.
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