Hemodynamic study of patients with early allograft dysfunction after liver transplantation / 中华超声影像学杂志

ABSTRACT

Objective:To explore the characteristics of postoperative hemodynamic changes in patients with early allograft dysfunction (EAD), and to provide clinical imaging support for the early diagnosis of EAD.Methods:A total of 907 patients who underwent liver transplantation in Tianjin First Central Hospital from December 2012 to June 2021 were retrospectively selected, and they were divided into EAD group (361 cases) and non-EAD group (546 cases) according to EAD diagnostic criteria. The peak systolic velocity(PSV) of the hepatic artery, end-diastolic velocity(EDV) of the hepatic artery, resistance index(RI), S/D(PSV/EDV), diameter of the portal vein(PVD), velocity of the portal vein(PVV), diameter of the middle hepatic vein(MHVD), velocity of the middle hepatic vein(MHVV), the diameter of the right hepatic vein(RHVD), and the velocity of the right hepatic vein (RHVV) were collected from 1 to 7 days after operation (a total of 5 573 ultrasound examination results), and the differences in ultrasound hemodynamic parameters were compared between the two groups. The correlation of S/D<2, PSV<25 cm/s, PVV<15 cm/s, MHVV or RHVV<15 cm/s within 3 days after operation with the occurence of EAO were analyzed by multivariate Logistic regression analysis.Results:①The PSV and EDV of the hepatic artery in the EAD group and the non-EAD group showed a slow upward trend at 1-7 days after operation, while the hepatic artery RI and PVV showed a downward trend, the MHVV and RHVV did not fluctuate significantly. ②The hepatic artery in the EAD group showed low-resistance blood flow in the early postoperative period, and the EDV were significantly higher than that in the non-EAD group on 1 d, 2 d, 3 d and 5 d, RI was significantly lower than that of the non-EAD group (all P<0.05); At 4 d, 6 d and 7 d, there was no significant differences of EDV and RI between the two groups(all P>0.05). The PSV of the EAD group was higher than that of the non-EAD group on 3 d ( P<0.05). Among the parameters of portal vein blood flow, the PVV in the EAD group was significantly higher than that in the non-EAD group on 1 d ( P<0.05), and there was no significant difference of PVD between the two groups at day 1-7. Among the parameters of hepatic venous blood flow, the MHVV and RHVV in the EAD group were significantly lower than those in the non-EAD group (all P<0.05), there was no significant difference between the two groups of MHVD and RHVD at 1-7 days. ③The incidence of grafted hepatic artery S/D<2 within 3 days after operation in EAD group was higher than that in non-EAD group. Binary Logistic regression multivariate analysis showed that the occurrence of grafted hepatic artery S/D<2 within 3 days after operation was significantly correlated with the occurrence of EAD[Exp(B)=1.878, P<0.05]. Conclusions:Patients who develop EAD after liver transplantation show low-resistance blood flow in the hepatic artery during the perioperative period, and the occurrence of hepatic artery S/D<2 within 3 days after operation can early predict the occurrence of EAD.