Is anybody using the SYVEK patch? I work in a CCU in Ft. Lauderdale and most of our docs use this seaweed polymer patch (1 X 1) to speed up clot formation. Manual pressure is applied for a total of 20 minutes and the patch is applied 5 minutes after the femoral sheath is pulled. It works fairly well. All you need is a small drop of blood (or saline) to congeal to the patch and you're all set to go. If the patch gets saturated as a result of continual oozing, we would continue to apply manual pressure, put on a pressure dressing and weigh it down with a 5 lb sandbag. Our unit rarely uses the fem-stop now and when used, only when all else has failed. I wonder if this might be more cost efficient??