I got it early last year, and when I got it, they didn't use a catheter, but they pierced the area next to the nose with a needle and injected the filler. Anesthetic cream is applied and lidocaine is administered separately, followed by filler injection. It hurt so much. ㅠㅠ I think it would be effective if you have a triangular depression right next to your nose, but I didn't like it that much. ㅠㅠ