The Resistive Index by Doppler Ultrasonography as a Predictor of the Long-Term Outcomes After Kidney Transplantation

•Risk factors for the high resistive index were older age and high preoperative HbA1c.•A high resistive index can predict mortality risk after kidney transplantation. Doppler ultrasonography (US) is a noninvasive examination for assessing graft function after kidney transplantation. Although Doppler...

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Bibliographic Details
Published in:Transplantation proceedings 2023-05, Vol.55 (4), p.777-781
Main Authors: Hidaka, Yuji, Yamanaga, Shigeyoshi, Kawabata, Chiaki, Toyoda, Mariko, Yamamoto, Yasuhiro, Inadome, Akito, Yokomizo, Hiroshi
Format: Article
Language:English
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Summary:•Risk factors for the high resistive index were older age and high preoperative HbA1c.•A high resistive index can predict mortality risk after kidney transplantation. Doppler ultrasonography (US) is a noninvasive examination for assessing graft function after kidney transplantation. Although Doppler US is routinely performed, only a few reports have investigated whether a high resistive index (RI) detected by Doppler US affects graft function and survival. We hypothesized that there is a relationship between a high RI and inferior outcomes after kidney transplantation. We included 164 living kidney transplant patients treated between April 2011 and July 2019. We divided the patients into 2 groups according to RI (cut-off, 0.7) 1 year after transplantation. The recipient was significantly older in the high RI (≥0.7) group. Moreover, there were significant differences in the prevalence of pretransplant diabetes mellitus and the value of pretransplant hemoglobin A1c. Regarding long-term outcome, there was no significant difference in overall graft survival (5 years, 92.6% vs 91.8%; 10 years, 85.0% vs 67.9%; P = .64). On the other hand, the mortality was significantly worse in the high RI group (5 years, 99.1% vs 93.9%; 10 years, 96.4% vs 70.0%, P = .013). A high RI might predict mortality after kidney transplantation.
ISSN:0041-1345
1873-2623
DOI:10.1016/j.transproceed.2023.04.006