What is the purpose of the bevel on a needle?

The bevel on a needle serves to facilitate smooth penetration into tissues during an injection. The design of the bevel, which is the angled edge at the tip of the needle, allows for a tapered entry point. This tapered point minimizes tissue trauma and discomfort as the needle is inserted, allowing it to easily glide through the various layers of tissue. It creates a smaller opening and reduces resistance, which can help in achieving a more precise and comfortable injection experience for the patient.

In addition, the bevel shape can also potentially enhance the flow of the anesthetic solution once the needle is positioned correctly, aiding in the efficiency of the procedure. Other aspects, such as needle strength or its gauge, do not directly relate to the primary function of enhancing the ease of insertion that the bevel provides.