Figure 2.

Comparison of primary patency rates between early and late cannulation groups. There was no significant difference in the primary patency rate between the early cannulation group (solid line; n = 77) and the late cannulation group (dotted line; n = 26) (P = 0.71). The early cannulation group underwent initial cannulation within 14 days after surgery and the late cannulation group underwent initial cannulation at ≥15 days after surgery.