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Is this considered a revision or a ligation of the AV fistula?

"Intraoperative ultrasound was used to visualize the arterial anastomosis. An oblique incision was made with a scalpel, and the incision was deepened with electrocautery and metzenbaum scissors until the brachial artery and fistula were both identified. The artery and fistula were both confirmed to be as such with Doppler. A 6 mm Dacron tube graft was brought onto the field, opened with metzenbaum scissors so that it was formed into a patch instead of a tube, and wrapped around the proximal fistula for sizing. This was then sutured into place sizing the fistula to the graft with interrupted 5-0 prolene suture. A palpable thrill was still noted over the fistula. Hemostasis was obtained with electrocautery. The wound was closed with 3-0 vicryl, 4-0 monocryl, and skin glue. A radial pulse was palpable on completion."