Texas Medical Assistant Certification Practice Test

What is the correct angle for a subcutaneous injection?

1. 30 degrees

2. 45 degrees

3. 90 degrees

4. 15 degrees

The correct answer is: 45 degrees

For a subcutaneous injection, the correct angle is typically 45 degrees. This angle is recommended because it allows the needle to enter the subcutaneous layer of adipose tissue without penetrating too deeply, which could potentially reach the muscle layer beneath it. Administering at this angle helps to ensure the medication is absorbed slowly, providing a steady and prolonged effect, which is particularly important for certain types of medications, such as insulin and heparin. A 30-degree angle might not effectively reach the subcutaneous tissue in patients with a lower fat distribution, while a 90-degree angle would increase the risk of injecting into the muscle instead of the intended subcutaneous layer. A 15-degree angle may risk not penetrating the skin sufficiently or properly targeting the subcutaneous area, leading to improper administration of the medication. Thus, using a 45-degree angle is the standard practice for ensuring the effectiveness and safety of subcutaneous injections.