The nurse is preparing to administer an injection into the deltoid muscle of an adult patient. Which needle size and length will the nurse choose?
a. 18 gauge ? 1 1/2 inch
b. 23 gauge ? 1/2 inch
c. 25 gauge ? 1 inch
d. 27 gauge ? 5/8 inch
ANS: C
For an intramuscular injection into an adult deltoid muscle, a 25-gauge, 1-inch needle is recommended. An 18-gauge needle is too big. While a 23-gauge needle can be used, a 1/2-inch needle is too small. A 27-gauge, 5/8 -inch needle is used for intradermal.
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