Broviac out (or is it "in") for maintenance

I changed her broviac dressing a bit ago. She got her port needle changed too, but the nurse did that. Her port is flushing, but not drawing, they will give her the "roto rooter" stuff called urokinase. Urokinase is an enzyme that is produced by the kidney and found in urine, that activates plasminogen, and that is used therapeutically to dissolve blood clots.
They have to do all her blood draws from her port now, because her broviac (both tubes) are "contaminated" with one of her meds. Not really contaminated (not germ contaminated), but for blood draws that particular med sticks to the tube walls and they would get a false high reading, so her port is for those blood draws now.
Susan