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Background. Renal dysfunction after kidney transplantation may be influenced by many reasons. This study was designed to evaluate whether the administration of dexmedetomidine (Dex) could ameliorate renal function and prognosis after kidney transplantation. Methods. A total of 65 patients were divided into Dex group ( n = 33 ) and Con group (Con,  n = 32 ). Dex group intravenously received an initial loading dose of 0.6 μg/kg Dex for 15 min before anaesthesia induction, followed by a rate of 0.4 μg/kg/h until 30 min after kidney reperfusion. By contrast, Con group received saline. The concentration of urinary kidney injury molecule-1 (KIM-1), serum creatinine (Cr), blood urea, urine output, β2 microglobulin (β2-MG), Cystatin C (CysC), and estimated glomerular filtration rate (eGFR) was recorded and compared between two groups during the course of the hospitalization or follow-up. Mean arterial pressure (MAP) and heart rate (HR), vasoactive drugs, and anaesthetics were recorded during the operation. Pain degree was evaluated using a visual analogue scale (VAS) after operation. Delayed graft function (DGF), graft loss, length of hospital stay, and mortality were compared between groups. Results. The concentration of KIM-1 in Dex group was lower than Con group at 2 h ( P = 0.018 ), 24 h ( P = 0.013 ), 48 h ( P &lt; 0.01 ), and 72 h ( P &lt; 0.01 ) after reperfusion. MAP of Dex group after tracheal intubation ( P = 0.012 ) and incision ( P = 0.018 ) and HR after intubation ( P = 0.021 ) were lower than that of Con group. The dosage of sufentanil during operation in Dex group was less than Con group ( P = 0.039 ). Patients that used atropine in Dex group were more than Con group ( P = 0.027 ). Patients who received Dex presented with lower VAS scores at 6 h ( P = 0.01 ) and 12 h ( P = 0.002 ) after operation. Concentration of serum Cr and blood urea had no significant differences between groups before operation and on postoperative day 1 to 6. Urine output was recorded for 6 days after operation and had no differences between groups. Also, no differences were identified between two groups in urea, Cr, β2-MG, CysC, and eGFR in the first 3 months after operation. Incidence of DGF after operation was detected no difference between groups, while length of hospital stay in Dex group was less than Con group ( P = 0.012 ). Conclusion. Dex can decrease kidney injury marker level, attenuate perioperative stress, relieve the dosage of sufentanil and postoperative pain, and reduce length of hospital stay. However, Dex is not associated with changes in prognosis in the first 3 months after transplantation.

Renoprotective Effect of Intraoperative Dexmedetomidine in Renal Transplantation