A nurse is caring for a client who has rheumatoid arthritis (RA). The nurse understands that this condition is caused by what type of hypersensitivity?
Type I hypersensitivity
Type II hypersensitivity
Type III hypersensitivity
Type IV hypersensitivity
The Correct Answer is C
Choice A reason:
Type I hypersensitivity is not involved in RA, as it does not involve IgE antibodies or mast cells.
Choice B reason:
Type II hypersensitivity is not involved in RA, as it does not involve IgG or IgM antibodies or target cells.2
Choice C reason:
RA is caused by type III hypersensitivity, which involves the formation and deposition of immune complexes in the synovial membranes of the joints. This triggers complement activation, inflammation, and tissue damage.
Choice D reason:
Type IV hypersensitivity is not involved in RA, as it does not involve cytotoxic T cells or helper T cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice B reason:
Transparent film dressing is a type of dressing that consists of a thin sheet of polyurethane with an adhesive coating. It allows oxygen and moisture vapor to pass through but prevents bacteria and water from entering the wound. It is suitable for wounds with minimal drainage, such as superficial abrasions or donor sites.
Choice C reason:
Calcium alginate dressing is a type of dressing that consists of fibers derived from seaweed that form a gel-like substance when they come in contact with wound exudate. It absorbs large amounts of drainage and supports autolytic debridement of necrotic tissue. It is suitable for wounds with heavy drainage, such as pressure ulcers or venous ulcers.
Choice D reason:
Hydrogel dressing is a type of dressing that consists of water or glycerin-based gel that provides moisture to dry wounds and supports autolytic debridement of necrotic tissue. It is suitable for wounds with minimal to moderate drainage, such as partial-thickness burns or radiation injuries.
Correct Answer is ["A","B","C","D"]
Explanation
Choice A reason:
Applying a moist dressing to the wound provides a moist environment for wound healing and protects the wound from contamination and trauma. Moisture prevents dehydration and necrosis of the wound bed and promotes cell migration and growth.
Choice B reason:
Assessing the wound for signs of infection is important to detect and treat any infection that may impair wound healing or cause systemic complications. Signs of infection include increased redness, warmth, swelling, pain, drainage, odor, fever, or leukocytosis.
Choice C reason:
Debriding necrotic tissue from the wound is essential to remove any dead or devitalized tissue that may interfere with wound healing or serve as a source of infection. Debridement can be done by surgical, mechanical, enzymatic, or autolytic methods.
Choice D reason:
Elevating the affected leg above the heart level reduces edema and improves blood circulation to the wound. Edema can impair wound healing by causing tissue hypoxia, increasing bacterial growth, and delaying granulation tissue formation.
Choice E reason:
Massaging the wound edges gently is not recommended for chronic wounds, as it may cause trauma or bleeding to the wound bed or delay epithelialization. Massaging may be beneficial for preventing hypertrophic scars or contractures in healed wounds.
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