TABLE 6.

Semiquantitative clotting scores of the extracorporeal circuit and the AV-access site after dialysis.

Clotting score of the dialyzer	n (%)	Total UFH dose (IU/kg/sess)	aPTT t4/0
Clean filter	15 (16)	119 ± 40	2.7 ± 1.8
Traces of coagulation in the filter	60 (64)	130 ± 64	3.7 ± 3.0
Intermediate state between previous and next score	19 (20)	126 ± 49	3.6 ± 2.3
Fully clotted ECC with interruption of the HD session	0 (0)	NA	NA
Clotting score of the venous chamber	n (%)	Total UFH dose (IU/kg/sess)	aPTT t4/0
No visible clots in the drip chambers	63 (67)	131 ± 58	3.8 ± 2.8
Traces of coagulation in the drip chambers	27 (29)	123 ± 59	3.2 ± 2.5
Intermediate state between previous and next score	4 (4)	91 ± 29	1.7 ± 1.6
Fully clotted ECC with interruption of the HD session	0 (0)	NA	NA
Puncture site bleeding score (for AVF/AVG patients only)	n (%)	Total UFH dose (IU/kg/sess)	aPTT t4/0
No bleeding 15 min after needle removal	29 (71)	90 ± 31	1.9 ± 1.3
Limited oozing 15 min after needle removal	9 (22)	82 ± 40	1.4 ± 0.5
Excessive bleeding 15 min after needle removal	3 (7)	101 ± 10	1.8 ± 1.0

ECC, extracorporeal circuit; IU, international units; sess, session.