If a nurse needs to administer 3 mL of medication intramuscularly to an adult patient, which site should be used 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 once a common choice for intramuscular injections. However, it has fallen out of favor due to several concerns, including:
Risk of sciatic nerve injury: The sciatic nerve, the largest nerve in the body, runs deep within the gluteal region. Injections into the dorsal gluteal site have a higher risk of accidentally hitting this nerve, which can lead to pain, numbness, and weakness in the leg.
Difficulty in landmarking: Accurately locating the dorsal gluteal site can be challenging, especially in patients with excessive adipose tissue or those who are unable to position themselves properly. Incorrect injection placement can increase the risk of tissue damage and poor drug absorption.
Pain: The dorsal gluteal site is often more painful than other intramuscular injection sites, likely due to the presence of more nerve endings in the area.
Choice B rationale:
The deltoid muscle, located in the upper arm, is a common site for intramuscular injections, particularly for vaccines. However, it has limitations when it comes to administering larger volumes of medication:
Small muscle mass: The deltoid is a relatively small muscle, limiting the amount of medication that can be safely injected. It's generally recommended to inject no more than 1-2 mL of medication into the deltoid muscle.
Proximity to nerves and blood vessels: The deltoid muscle is located near the radial nerve and brachial artery. Improper injection technique could potentially injure these structures.
Choice C rationale:
The vastus lateralis muscle, located in the anterolateral aspect of the thigh, is considered the preferred site for intramuscular injections in adults when the volume of medication exceeds 2 mL. Here's why:
Large muscle mass: The vastus lateralis is a large, thick muscle, capable of accommodating larger volumes of medication (up to 5 mL).
Easy to access: The vastus lateralis is easily accessible and can be injected with the patient in a sitting or lying position.
Fewer nerves and blood vessels: The vastus lateralis has fewer major nerves and blood vessels compared to other injection sites, reducing the risk of injury.
Pain tolerance: Studies have shown that injections into the vastus lateralis are generally less painful than injections into the deltoid or gluteal muscles.
Choice D rationale:
The lateral piriformis muscle is not a recognized or recommended site for intramuscular injections. It's a deep muscle located within the pelvic region, making it difficult to access and posing a higher risk of injury to surrounding structures.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C"]
Explanation
Choice A rationale:
Splinting the incision when coughing helps to minimize pain and discomfort, which can encourage deeper breathing and coughing. This is essential because deep breathing and coughing help to clear secretions from the lungs and prevent atelectasis (collapse of lung tissue).
Steps for splinting the incision:
Place a pillow or folded towel over the incision site.
Instruct the patient to apply gentle pressure to the pillow or towel with their hands when coughing or deep breathing. Encourage the patient to relax their abdominal muscles during coughing and deep breathing exercises.
Choice B rationale:
Sitting up in a chair and ambulating promote lung expansion and help to mobilize secretions. This is because gravity assists in moving secretions from the smaller airways into the larger airways, where they can be more easily coughed up.
Additional benefits of sitting up and ambulating: Improved circulation
Decreased risk of pneumonia Enhanced recovery from surgery Choice C rationale:
Using an incentive spirometer hourly helps to increase lung capacity and prevent atelectasis. The device encourages the patient to take slow, deep breaths, which helps to inflate the alveoli (air sacs) in the lungs.
Instructions for using an incentive spirometer:
Sit upright in a chair or bed.
Place the mouthpiece of the spirometer in your mouth and seal your lips around it.
Inhale slowly and deeply through the mouthpiece, aiming to raise the piston inside the device as high as possible. Hold your breath for 3-5 seconds.
Exhale slowly and completely through the mouthpiece.
Repeat the process 10-15 times per hour, or as instructed by your healthcare provider.
Correct Answer is A
Explanation
Choice A rationale:
Standing orders are pre-approved orders that nurses can implement for specific patient situations without requiring a new order from a provider each time. They are designed to streamline care, promote efficiency, and ensure consistency in treatment. In this case, the standing order for EKGs on all cardiac unit admissions serves several key purposes:
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