A patient has an order for a subcutaneous injection of insulin.
Into which of the following tissues will the nurse prepare to give this injection?
Into the patient’s intravenous line.
Into the patient’s vastus lateralis.
Into the fatty tissue of the patient’s abdomen.
Into the patient’s deltoid.
The Correct Answer is C
Choice A rationale:
Intravenous (IV) administration delivers medication directly into the bloodstream. This route is not appropriate for insulin because it would result in a rapid and potentially dangerous drop in blood glucose levels. Insulin needs to be absorbed more slowly to mimic the natural release of insulin from the pancreas.
IV administration also requires sterile technique and specialized equipment, making it more complex and time-consuming than subcutaneous injection.
Additionally, there is a higher risk of infection and other complications with IV administration.
Choice B rationale:
The vastus lateralis is a muscle in the thigh that is commonly used for intramuscular (IM) injections. However, IM injections are not typically used for insulin administration because they can be more painful and have a slower absorption rate than subcutaneous injections.
IM injections also carry a higher risk of hitting a blood vessel, which could lead to erratic absorption of insulin.
Choice D rationale:
The deltoid is a muscle in the upper arm that can be used for subcutaneous injections. However, the abdomen is generally the preferred site for insulin injection because it has a greater amount of subcutaneous fat, which helps to slow the absorption of insulin and provide a more consistent effect.
The abdomen is also a more convenient site for self-injection, as it is easily accessible.
Choice C rationale:
The fatty tissue of the abdomen is the ideal site for subcutaneous insulin injection because it provides slow and consistent absorption of insulin.
The abdomen has a rich blood supply, which helps to distribute the insulin throughout the body.
The subcutaneous tissue in the abdomen is relatively thin, which makes it easy to inject insulin without causing pain or discomfort.
The abdomen is also a large area, which allows for multiple injection sites to be used and rotated to prevent lipohypertrophy (thickening of the subcutaneous tissue).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Debridement refers to the removal of dead, damaged, or infected tissue to promote healing. It is not a term used to describe skin breakdown caused by moisture.
Choice B rationale:
Evisceration is the protrusion of internal organs through a wound or surgical incision. It is not relevant to the condition of perineal skin breakdown due to wetness.
Choice D rationale:
Dehiscence is the separation of a surgical wound. It is not applicable in this case, as there is no mention of a surgical wound.
Choice C rationale:
Maceration is a term used to describe skin that has become softened and broken down due to prolonged exposure to moisture. This is the most accurate term to describe the condition of perineal skin breakdown after sitting in wet underclothes for many hours.
Key features of maceration:
Skin softening: The skin becomes white and wrinkled, resembling a prune.
Epidermal loss: The outer layer of skin (epidermis) may slough off, leaving the underlying tissue exposed. Redness: The affected area may become red and inflamed.
Pain or tenderness: The area may be painful or tender to the touch.
Increased risk of infection: Macerated skin is more susceptible to infection due to the breakdown of the skin barrier. Causes of maceration:
Prolonged exposure to moisture: This can include sweat, urine, feces, wound drainage, or excessive bathing. Friction: Rubbing or chafing of the skin can also contribute to maceration.
Impaired circulation: Poor blood flow to the area can make it more vulnerable to maceration. Prevention of maceration:
Keep skin clean and dry: This is the most important step in preventing maceration. Change wet or soiled clothing or dressings promptly.
Apply barrier creams or ointments: These can help to protect the skin from moisture.
Use incontinence products: These can help to keep the skin dry if the patient is incontinent. Reposition the patient frequently: This helps to reduce pressure and friction on the skin.
Correct Answer is A
Explanation
Choice A rationale:
Stage 2 pressure injuries are characterized by partial-thickness loss of skin layers involving the epidermis and/or dermis. They present as a red, blistered area, often with an intact or ruptured serum-filled blister. The wound bed is typically moist and may be painful. There is no exposure of underlying bone, tendon, or muscle.
Key features of Stage 2 pressure injuries that align with the patient's presentation:
Red, blistered area: This is a hallmark sign of Stage 2, indicating tissue damage and inflammation in the epidermis and dermis. Large size: The size of the wound suggests more extensive tissue damage, consistent with Stage 2 rather than Stage 1.
Absence of deeper tissue involvement: The absence of exposed bone, tendon, or muscle rules out Stage 3 or 4 pressure injuries.
Rationales for other choices:
Choice B: Stage 4
Stage 4 pressure injuries involve full-thickness tissue loss with exposed bone, tendon, or muscle. This is not consistent with the patient's presentation, which does not describe exposed deeper tissues.
Choice C: Stage 3
Stage 3 pressure injuries involve full-thickness tissue loss, but without exposed bone, tendon, or muscle. They often present with a deep crater-like appearance and may have undermining or tunneling. The patient's wound does not exhibit these features, making Stage 3 less likely.
Choice D: Stage 1
Stage 1 pressure injuries are characterized by intact skin with non-blanchable redness over a bony prominence. They do not involve blisters or open wounds. The patient's presentation clearly exceeds the features of Stage 1.
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