John Gualdoni (Arthrex® Product Manager, Knee and Hip Arthroscopy) describes the features and benefits of using the Cannulated Retractable Knife for performing a safe and accurate capsulotomy at the start of an arthroscopic hip procedure. This sharp low-profile knife can be inserted over top of a nitinol wire and has a retractable sheath that can be used to protect the surrounding soft tissues of the hip joint, helping to facilitate a simple and reproducible incision through the iliofemoral ligament.