Haemostatic Response of Polyethylene Terephthalate Treated by Oxygen and Nitrogen Plasma Afterglows

Table 1

XPS surface composition of PET samples coated with heparin (in at.%).

Number	Sample	C	O	N	S
#0	Pure untreated PET	75.1	24.9	/	/
#1	Untreated + heparin	73.1	26.9	/	/
#2	Treated in O2 plasma	59.5	40.5	/	/
#3	Treated in O2 plasma + heparin	62.5	35.6	1.9	/
#4	Treated in N2 plasma	66.2	30.2	3.6	/
#5	Treated in N2 plasma + heparin	61.3	35.5	3.2	/