The most common method of administering an intramuscular injection involves a:
A) 15-degree angle
B) 45-degree angle
C) 90-degree angle
D) 180-degree angle
C) 90-degree angle
A 90-degree angle is the most commonly used method of administering an intramuscular injection. The needle pierces through the dermal and subcutaneous layers of skin and proceeds into the desired muscle. The Z-track method of injection is also used but is not as popular for IM injections. The other choices of angles are incorrect in that they do not offer an optimal penetration of the skin tissues required to reach the muscle.
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