What type of injection should be given at a 15-degree angle without aspiration?

A subcutaneous injection is administered at a 15-degree angle because this technique allows for the medication to be deposited into the fatty tissue layer just beneath the skin. Aspiration, which involves pulling back on the syringe plunger to check for blood return, is not necessary for subcutaneous injections. The reason for this is that the blood vessels in the subcutaneous tissue are deeper and less likely to be inadvertently punctured during the injection compared to intramuscular injections, where aspiration is sometimes recommended to ensure that the needle has not entered a blood vessel.

By using a 15-degree angle, the practitioner minimizes discomfort for the patient and optimizes the absorption of the medication. In contrast, intramuscular injections are typically given at a 90-degree angle, and intravenous injections are delivered directly into the bloodstream at a specific technique that does not include aspiration for all situations. Understanding the correct angles for different types of injections is crucial for effectiveness and patient safety.