Fig. 5
PSVU and PSVR on both the ipsilateral and contralateral sides relative to the cannulation. a Compared with T2, the PSVR decreased significantly at T3 on the side ipsilateral to the cannulation (p = 0.006). Compared with T0, the PSVU increased significantly at T1 and T2 (both p < 0.001); compared with T1, the PSVU decreased significantly at T2 and T3 (p = 0.001 and p < 0.001, respectively); compared with T2, the PSVU decreased significantly at T3 (p < 0.001). b Compared with T0, the PSVR increased significantly at T1 and T2 on the side contralateral to the cannulation (p < 0.001 and p = 0.005, respectively); compared with T1, the PSVR decreased significantly at T3 (p < 0.001); compared with T2, the PSVR decreased significantly at T3 (p = 0.006). Compared with T0, the PSVU increased significantly at T1 and T2 (p = 0.003 and p < 0.001, respectively); compared with T1, the PSVU decreased significantly at T3 (p = 0.004); compared with T2, the PSVU decreased significantly at T3 (p = 0.001)