Portacaval shunt is a surgical procedure that involves creating a connection between the portal vein and the inferior vena cava. This helps in the diversion of blood from the portal vein, which carries blood from the gastrointestinal tract, to the systemic circulation. There are several synonyms for the term portacaval shunt, including portosystemic shunt, splanchnic-caval anastomoses, mesocaval anastomoses, hepato-caval shunt, and portocaval anastomoses. These synonyms are used interchangeably and describe the same surgical procedure. Portacaval shunt is a treatment option for patients with portal hypertension, a condition that causes increased pressure in the portal vein, leading to liver damage.