What is the recommended angle for administering a vastus lateralis injection?

The correct angle for administering a vastus lateralis injection is typically 90 degrees. This angle allows for the needle to enter the muscle tissue directly, which is crucial for ensuring the medication is delivered effectively into the muscle. The vastus lateralis, located on the outer part of the thigh, is a large muscle that can accommodate intramuscular injections well, thereby allowing for proper absorption of the medication administered.

When precise angles like 30, 45, or 60 degrees are employed, they are more suitable for other routes of administration, such as subcutaneous injections, where a shallower angle can help avoid deep tissue penetration. Thus, the direct and efficient approach of using a 90-degree angle for vastus lateralis injections aligns with standard practices in intramuscular administration.