Which needle size is most appropriate for an intramuscular injection in an adult?
27 gauge, 3/8 inch
22 gauge, 1.5 inch
18 gauge, 1.5 inch
25 gauge, 5/8 inch
The Correct Answer is B
A. 27 gauge, 3/8 inch: This needle is too small in both gauge and length for an intramuscular injection in an adult. It is more appropriate for intradermal or subcutaneous injections and may not reach muscle tissue.
B. 22 gauge, 1.5 inch: A 22-gauge, 1.5-inch needle is commonly used for intramuscular injections in adults, especially in larger muscle groups such as the deltoid or ventrogluteal muscles. The gauge allows medication to flow easily while the length ensures proper muscle penetration.
C. 18 gauge, 1.5 inch: An 18-gauge needle is too large for routine intramuscular injections and is typically reserved for drawing up medications or administering blood products. Using this size could cause unnecessary tissue trauma and discomfort.
D. 25 gauge, 5/8 inch: This needle is generally used for subcutaneous injections and is too short to reliably reach muscle tissue in most adults. Inadequate depth may result in improper medication absorption.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Consult the pharmacist: Consulting the pharmacist is important for clarification on medication safety and administration, but the first action should be to notify the prescriber to confirm or adjust the order to match safe practice.
B. Administer the medication orally: Administering the medication via an incorrect or unapproved route can result in reduced efficacy, toxicity, or harm. It is unsafe to proceed without verification.
C. Notify the prescriber for clarification: The prescriber must confirm or modify the order if the route is not recommended. This ensures the medication is given safely and appropriately, preventing potential adverse events.
D. Hold the medication indefinitely: Holding the medication without seeking clarification may delay essential treatment. While temporary withholding is acceptable, the nurse must actively communicate with the prescriber rather than leaving the situation unresolved.
Correct Answer is B
Explanation
Calculation:
Ordered Dose: 60 mg
Available Tablet Strength: 30 mg/tablet
- Calculate the number of tablets
Number of Tablets = Dose ÷ Tablet Strength
Number of Tablets = 60 ÷ 30
Number of Tablets = 2 tablets
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