What angle of insertion is used for an intramuscular injection?

What angle of insertion is used for an intramuscular injection?

• A. 45 degrees
• B. 0 degrees
• C. 90 degrees
• D. 180 degrees

Answer: (C)

Intramuscular injections are meant to deliver medication into the muscle tissue for faster, more predictable absorption. To reliably reach the muscle, you insert the needle perpendicular to the skin, at a 90-degree angle. This angle helps the needle pass through the skin and subcutaneous tissue and enter the muscle itself. A 45-degree angle is used for subcutaneous injections, where you aim for the fat layer rather than the muscle. A 0-degree angle wouldn’t penetrate the skin, and a 180-degree angle isn’t a standard technique for IM injections. So the 90-degree angle is the correct choice for intramuscular administration.

Intramuscular injections are meant to deliver medication into the muscle tissue for faster, more predictable absorption. To reliably reach the muscle, you insert the needle perpendicular to the skin, at a 90-degree angle. This angle helps the needle pass through the skin and subcutaneous tissue and enter the muscle itself. A 45-degree angle is used for subcutaneous injections, where you aim for the fat layer rather than the muscle. A 0-degree angle wouldn’t penetrate the skin, and a 180-degree angle isn’t a standard technique for IM injections. So the 90-degree angle is the correct choice for intramuscular administration.