The nurse is to administer 3 mL of medication intramuscularly to an adult patient. Which is the appropriate site for the injection?
Dorsal gluteal
Deltoid
Vastus lateralis
Lateral piriformis
The Correct Answer is C
Choice A rationale:
The dorsal gluteal site (also known as the dorsogluteal site) was previously a common injection site, but it's now not recommended due to several significant risks:
Proximity to the sciatic nerve: The sciatic nerve is the largest nerve in the body, and it runs close to the dorsal gluteal site. Accidental injection into or near the nerve can cause severe pain, nerve damage, and potential paralysis.
Difficulty in locating landmarks: The landmarks for the dorsal gluteal site can be difficult to locate accurately, especially in obese patients or those with decreased muscle mass. This increases the risk of injecting into the wrong area.
Risk of injury to blood vessels: The dorsal gluteal site also has a higher risk of injury to blood vessels, as several large vessels run through the area.
Choice B rationale:
The deltoid muscle is located in the upper arm and is a common site for intramuscular injections, but it has limitations for larger volumes:
Small muscle size: The deltoid muscle is relatively small compared to other IM injection sites. It's generally recommended for smaller volumes of medication (up to 1 mL in adults).
Subcutaneous tissue: The deltoid muscle often has a layer of subcutaneous tissue (fat) that can hinder absorption of medication.
Choice C rationale:
The vastus lateralis muscle is the preferred site for intramuscular injections in adults for several reasons:
Large muscle size: It's a large, thick muscle that can accommodate larger volumes of medication (up to 5 mL in adults). Easy to locate landmarks: The landmarks for the vastus lateralis are easy to identify, even in obese patients.
Few major nerves or blood vessels: It has fewer major nerves or blood vessels in the area, reducing the risk of injury. Pain tolerance: It's generally considered to be a less painful injection site than the deltoid or dorsogluteal sites.
Choice D rationale:
The lateral piriformis muscle is not a recognized or recommended site for intramuscular injections. It's a deep muscle located in the buttocks, and injecting into it would be difficult and potentially dangerous due to its proximity to the sciatic nerve and other important structures.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Soaking the wound in an Epsom salt solution is not recommended for abscessed wounds. While Epsom salt has some potential benefits for wound healing, such as reducing inflammation and drawing out fluids, it can also be irritating to the skin and may actually worsen the abscess. Additionally, there's a risk of introducing bacteria from the Epsom salt into the wound, which could lead to further infection.
Choice B rationale:
Administering warm water sitz baths is not directly applicable to an abscessed leg wound. Sitz baths are typically used for conditions affecting the perineal area, such as hemorrhoids or postpartum discomfort. They may help to soothe and cleanse the affected area, but they would not be effective in treating an abscess on the leg.
Choice C rationale:
Applying cold moist compresses is not the most appropriate intervention for an abscessed wound. Cold compresses can help to reduce pain and inflammation, but they can also constrict blood vessels and potentially hinder the healing process. Warm compresses are generally preferred for abscesses because they can help to promote drainage and healing.
Choice D rationale:
Applying warm moist compresses is the most appropriate nursing intervention for an abscessed leg wound. Warm compresses have several beneficial effects:
They promote vasodilation, which increases blood flow to the area and helps to deliver white blood cells and other healing agents to the site of infection.
They help to soften and loosen hardened pus, making it easier for the abscess to drain.
They provide a moist environment that promotes healing and prevents the wound from drying out. They can help to reduce pain and inflammation.
Correct Answer is A
Explanation
Choice A rationale:
Shearing force is the primary factor that contributes to the formation of pressure injuries when a patient's body slides downward. It occurs when two surfaces move in opposite directions, causing stress and strain on the tissues between them.
Compression of Tissues: When the patient's body slides downward, the skin and underlying tissues are compressed between the bony prominences (such as the sacrum or heels) and the surface of the bed. This compression restricts blood flow to the area, depriving the tissues of oxygen and nutrients.
Tissue Stretching and Tearing: As the body slides, the skin and underlying tissues are also stretched and pulled in opposite directions. This shearing force disrupts the normal alignment of cells and tissues, leading to microscopic tears and damage.
Impaired Blood Flow: Shearing force further compromises blood flow by stretching and compressing blood vessels. This reduces the delivery of oxygen and nutrients to the tissues, while also hindering the removal of waste products.
Tissue Damage and Necrosis: The combination of compression, stretching, and impaired blood flow leads to cell death and tissue necrosis. This is the hallmark of pressure injuries, which can range from superficial blisters to deep ulcers that extend into muscle and bone.
Factors that Increase Shearing Force: Certain factors can increase the risk of shearing force and pressure injury development, including:
Increased moisture (from sweat or incontinence) Decreased mobility
Poor skin integrity
Malnutrition
Friction from bedsheets
In conclusion, shearing force is the main factor that contributes to pressure injury formation when a patient's body slides downward. It disrupts blood flow, damages tissues, and can lead to significant wounds.
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