RF cannulas are used by physicians to guide the electrode to the desired location. The quality of construction and resistance of the canola and of course the variety of sizes and types (Curved Sharp-Curved Blunt-Straight Sharp) play an important role in this.

ECHOGENIC cannulas are designed to provide a better view of the doctor on ultrasound.

Boston Scientific (COSMAN) cannulas are produced in different colors based on length, which makes their diagnosis quick and easy for the doctor and the user.