Table 2.

Patency of below-knee femoropopliteal grafts. all series published since 1981.30

Graft and Patency Type	Primary Patency (%)
	1-Mo	6-Mo	1-Yr	2-Yr	3-Yr	4-Yr
Primary Patency
Reversed Saphenous Vein	98	90	84	79	78	77
In Situ vein bypass	95	87	80	76	73	68
Secondary Patency
In situ vein bypass	97	96	96	89	86	81
Arm Vein	97		83	83	73	70
Polytetrafluoroethylene	96	80	68	61	44	40
Human umbilical vein	88	82	77	70	61	60