Table 1. Elements Present on the Surface of Catheter Materials before and after the Biofilm Formation.

element	TFP–PDMS		silicone		siliconized latex
	before	after	before	after	before	after
C	46.5	46.6	26.6	41.0	83.5	42.5
O	28.0	37.9	37.1	40.3	9.9	19.6
Si	19.2	9.4	36.3	18.4	0.4	16.7
F	6.4	6.0
Ca				0.3	0.1	0.6
Mg
S					3.2
Cl					2.9	0.5