As promoters of orthotopic liver transplantation (OLT) with preservation of caval flow, we reviewed our 8-year experience to assess the feasibility and limits of this technique. Preservation of caval flow during OLT, which improves intraoperative hemodynamic stability, was not considered feasible in a significant proportion of transplant recipients. When transient clamping of caval flow is required, causes and consequences of this clamping during all phases of the procedure were not reported. Between 1991 and 1998, a total of 275 OLTs using a whole graft were performed in 259 patients with a policy consisting of a systematic attempt to preserve inferior vena cava ( P reservation of the inferior vena cava (IVC) during orthotopic liver transplantation (OLT), described by Calne and William 1 in 1968, was popularized in 1989 by Tzakis et al 2 as the piggyback procedure. It was advocated that the main advantages of this procedure were to avoid retrocaval dissection to reduce the risk for bleeding and facilitate caval anastomosis in patients receiving large-for-size grafts. 2,3 As originally described, this procedure was frequently performed using transient cross-clamping of the IVC, especially in the case of difficulty disconnecting the native liver from the retrohepatic IVC. 2 As a consequence, this procedure was frequently performed in conjunction with venovenous bypass, with the aim to overcome the hemodynamic consequences of IVC cross-clamping. 2 To avoid the need for venovenous bypass, we described in 1992 a modification of the piggyback technique in which caval flow was preserved throughout the OLT procedure. 4 This modification made preservation of IVC blood flow possible by performing either a sideto-side or end-to-side cavocaval anastomosis and using the middle and left hepatic cuff with partial IVC clamping at its anterior face. 5 In addition, splanchnic venous drainage could be maintained through a transient portocaval anastomosis. 5 Although this procedure was shown to help improve intraoperative hemodynamic stability, several investigators objected that it was not feasible in a significant proportion of transplant recipients. [6][7][8][9] Since 1991, we have attempted systematically to use the modified piggyback technique for all OLTs at our center. As promoters of this technique, we review our experience over the ensuing 8 years in an attempt to determine the feasibility of caval-flow preservation and report the rate, causes, and consequences of total IVC clamping.