HI! your post is almost a month old today when I saw it, so a am assuming your problem has been resolved. FYI in the future, when you dialyze a client with coagulation problems, this is what we do in our unit here in Toronto. We use the Integra machines: we attach a special tubing called the Bioline, or bioflow. This line connects to the venous chamber (the one that usually clots often), and set the machine to deliver 2L of saline per hour. The machine, in this mode, substracts the amount of saline before it reaches the pt. circulation thus allowing for safer fluid removal specially in acute pts. For ambulatory patients who have no significant coag. issues, we do "flushes" of saline, once qh, and we count those in total wt. loss desired. Flushing the circuit and filter with 1ml. or 1:10,000.00 hep. and then discarding as pt. is connected works well. hope this helps.