In addition to the forearm, which of these sites are commonly used for the administration of an intradermal injection?
Abdomen, 2-in. from umbilicus.
Anterior thigh.
Posterior upper arm.
Upper chest.
The Correct Answer is D
Choice A rationale
The abdomen, specifically 2 inches from the umbilicus, is a common site for subcutaneous injections due to the presence of ample adipose tissue, which allows for slower absorption of medications like insulin or heparin. Intradermal injections require a site with a thin epidermis and minimal subcutaneous tissue to ensure the medication remains within the dermal layer, making the abdomen unsuitable.
Choice B rationale
The anterior thigh is a common site for intramuscular injections, particularly in infants, due to the large muscle mass (vastus lateralis). While it can be used for subcutaneous injections, its muscularity and varying skin thickness make it less ideal for the precise shallow angle required for an intradermal injection, where the goal is to deposit the medication into the dermis.
Choice C rationale
The posterior upper arm, specifically the triceps area, is frequently utilized for subcutaneous injections, such as insulin or certain vaccines, because it offers sufficient subcutaneous tissue. However, similar to the anterior thigh, its anatomical characteristics with thicker skin and subcutaneous fat layers make it less optimal for the very superficial intradermal injection technique.
Choice D rationale
The upper chest, particularly below the clavicle and above the breasts, is an appropriate site for intradermal injections. This area, along with the inner forearm and upper back, has a thin epidermis and less subcutaneous tissue, which facilitates the proper placement of the medication within the dermis, allowing for the formation of a visible wheal, a key indicator of a successful intradermal injection.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["39.2"]
Explanation
Step 1 is: Subtract 32 from the Fahrenheit temperature. 102.6 - 32 = 70.6.
Step 2 is: Divide the result by 1.8. 70.6 ÷ 1.8 = 39.222.
Step 3 is: Round to the nearest tenth. The final calculated answer is 39.2 °C.
Correct Answer is B
Explanation
Choice A rationale
A 15-degree angle is typically used for intradermal injections, where the medication is deposited just beneath the epidermis to form a bleb, not for subcutaneous injections which target the adipose tissue layer. Taut skin is also incorrect for subcutaneous.
Choice B rationale
For an average-sized client receiving a subcutaneous injection, a 45-degree angle facilitates optimal medication deposition into the subcutaneous adipose tissue layer. Pinching the skin helps to elevate the subcutaneous tissue away from underlying muscle, reducing the risk of intramuscular injection.
Choice C rationale
A 90-degree angle is typically used for intramuscular injections in most adults, aiming to deposit medication deep into muscle tissue. Stretching the skin is generally more appropriate for intramuscular injections rather than subcutaneous.
Choice D rationale
Z-tracking is a technique primarily used for intramuscular injections of irritating medications to prevent leakage back into subcutaneous tissue. It is not a standard technique for subcutaneous injections, which use a different angle and skin manipulation.
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