Abstract
Objective To investigate the value of vascular index(VI) in renal functionevaluation after renal transplantation by superb microvascular imaging(SMI). Methods Ultrasound and clinical data of 115 renal transplant recipients were collected: 32 cases had good recovery of renal function after surgery(group A); 35 cases of abnormal renal function caused by diseases or unexplained fluctuations in Scr, but the renal function was normal during the follow-up(group B); 48 cases with abnormal renal function, Scr increased continuously(group C). The correlation between VI of renal cortex and Scr was analysed. Results The VI of renal cortex in group A, B and C were (33.51±3.26)%, (31.64±4.83)%, (25.58±6.07)%, respectively. There were significant differences between VI in group A and C, and between group B and C (P 0.05). There was significant negative correlation between VI of renal cortex and Scr in group C (rs=-0.90, P 0.05). Conclusions When renal function is normal, VI is maintained at a high level. When renal function declines, VI decreases. VI can reflect the renal cortex blood flow, indirectly reflect the glomerular filtration function, and provide a reliable indicator for clinical evaluation of renal allograft function. Key words: Ultrasonography; Kidney transplantition; Superb microvascular imaging; Vascular index
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