Liver Transplant Surgical Technique

Liver transplantation is most often an orthotopic operation: the diseased native liver is removed and a donor liver is implanted in its place through a sequence of vascular and biliary anastomoses. The procedure must re-establish hepatic inflow (portal vein and hepatic artery), venous outflow (inferior vena cava or hepatic veins), and biliary drainage, and is technically demanding because of the liver's central vascular relationships.

Definition

Liver transplant surgical technique is the orthotopic replacement of the recipient's liver with a donor liver, comprising recipient hepatectomy, implantation with anastomosis of the inferior vena cava (or hepatic veins), portal vein, and hepatic artery, reperfusion, and reconstruction of the biliary tract by duct-to-duct anastomosis or hepaticojejunostomy.

Scope

The topic covers the standard recipient hepatectomy and implantation sequence, the conventional caval-replacement and caval-preserving (piggyback) techniques, and biliary reconstruction. Donor procurement, split and living-donor grafts, organ preservation, and immunosuppression are addressed in neighbouring entries.

Core questions

• How is the recipient liver removed and the donor liver implanted in its place?
• What distinguishes the conventional caval-replacement technique from the piggyback (caval-preserving) technique?
• Which vascular anastomoses re-establish hepatic inflow and outflow?
• How is the biliary tract reconstructed?

Key concepts

• Orthotopic implantation
• Recipient hepatectomy
• Caval-replacement technique
• Piggyback (caval-preserving) technique
• Portal vein and hepatic artery anastomoses
• Venovenous bypass
• Biliary reconstruction (duct-to-duct or hepaticojejunostomy)
• Anhepatic phase

Mechanisms

After recipient hepatectomy the donor liver is implanted. In the conventional technique a segment of the recipient inferior vena cava is removed and replaced, requiring suprahepatic and infrahepatic caval anastomoses and often venovenous bypass during the anhepatic phase. In the piggyback technique the recipient vena cava is preserved and the donor liver's outflow is anastomosed to the recipient hepatic vein cuff, which can maintain caval flow and avoid bypass; outflow can be optimized by incorporating multiple hepatic veins in a wide anastomosis (panaro-2011). Hepatic inflow is restored by portal vein and hepatic artery anastomoses, after which the graft is reperfused. Biliary continuity is then reconstructed, usually by a duct-to-duct anastomosis or, when the recipient duct is unsuitable, a hepaticojejunostomy (starzl-1982, watson-dark-2012).

Clinical relevance

Liver transplantation is the definitive treatment for end-stage liver disease and acute liver failure, and the operative technique governs outcomes including vascular thrombosis, outflow obstruction, and biliary complications. This entry describes the operation at a reference level and is not a source of surgical instruction or individualized clinical advice.

Epidemiology

Liver grafts may be whole deceased-donor organs, split grafts shared between two recipients, or partial living-donor grafts. The choice of graft type and recipient anatomy shapes the implantation technique (watson-dark-2012).

Evidence & guidelines

Orthotopic liver transplantation was developed and refined by Starzl and colleagues, whose work documents the evolution of the operation and its anastomoses (starzl-1982). The piggyback (caval-preserving) approach and strategies to optimize venous outflow are described in technical reports such as Panaro and colleagues (panaro-2011), and the contemporary practice is synthesized by Watson and Dark (watson-dark-2012).

History

Starzl performed the first human liver transplants in the early 1960s and, with progressive refinement of technique and immunosuppression through the 1960s and 1970s, established orthotopic liver transplantation as a viable therapy, a trajectory he reviewed in 1982 (starzl-1982). The caval-preserving piggyback technique, popularized later, reduced the need for venovenous bypass and is the subject of continued technical refinement (panaro-2011).

Debates

Caval-replacement versus piggyback technique

The piggyback technique preserves the recipient vena cava and can avoid venovenous bypass, but ensuring adequate venous outflow requires careful construction of the hepatic vein anastomosis; technical refinements aim to optimize outflow without caval occlusion.

Key figures

• Thomas E. Starzl
• Roy Calne
• Andreas Tzakis

Seminal works

• starzl-1982

Frequently asked questions

What is the 'piggyback' technique in liver transplantation?

It is a caval-preserving implantation method in which the recipient's inferior vena cava is left intact and the donor liver's venous outflow is sewn onto the recipient hepatic vein cuff, which can preserve caval blood flow and avoid the need for venovenous bypass.

What is the anhepatic phase?

It is the interval during the operation between removal of the diseased liver and reperfusion of the donor liver, when the recipient has no functioning liver; its management is a central consideration of the procedure.