Obsidian RFT edited 5Obsidian® RFT is a bioactive platelet rich fibrin matrix for regenerative fistula surgery in coloproctology. Obsidian® RFT includes a special brush for preparation of the fistula tract prior to filling the tract with Obsidian® RFT. Obsidian® RFT can be co-applied with antibiotics by using the Vivostat® Co-delivery System.