ARRT Patient Care Practice Exam

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What is the recommended needle angle for intramuscular injections?

90 degrees
75 degrees
45 degrees
15 degrees

The correct answer is: 75 degrees

The recommended needle angle for intramuscular injections is 90 degrees. This angle allows the needle to enter the muscle tissue directly, ensuring that the medication is delivered into the muscle where it can be absorbed effectively. Injecting at a 90-degree angle helps to minimize the risk of injecting into subcutaneous tissue or causing discomfort to the patient. In comparison, other angles would not be appropriate for intramuscular injections. For instance, a 75-degree angle may not effectively reach the muscle layer, while a 45-degree angle is typically used for subcutaneous injections. A 15-degree angle is too shallow for any muscular delivery and could lead to improper placement, resulting in ineffective treatment. Therefore, using a 90-degree angle is essential for ensuring that injections are administered correctly and safely.