 When Avitene, Hemopad, Instat, or collagen type products are used, autotransfusion should be interrupted and a waste or wall suction source must be used.Autotransfusion can be resumed once these products are flushed from the surgical site.If Gelfoam, Surgicel, Thrombogen or Thrombostat are used, autotransfusion can continue, however direct suctioning of these products should be avoided.