Fig. 2
SU and SR on the ipsilateral and contralateral side to cannulation. a Compared with T0, the SU increased significantly at T1 and T2 on the side ipsilateral to the cannulation (p = 0.001 and p = 0.017, respectively). Compared with T1, the SU decreased significantly at T3 (p = 0.042), while no difference was found in the SR among the four time points. b No difference was found in the SU and SR among the four time points on the side contralateral to the cannulation (all p > 0.05)