<prompt> In patients with cirrhosis of the liver the site of venous thrombosis isInfra-hepatic inferior vena cavaInfra-renal inferior vena cavaHepatic veinsPoal vein  <response>: In poal hypeension, Hepatic venous pressure gradient HVPG - It is done using a balloon catheter. Difference between free hepatic vein pressure and wedged hepatic vein pressure is HVPG. Normal HVPG is 8 mm Hg. It is more than 10 mm Hg in cirrhosis. Ref: SRB;s manual of surgery,3 rd ed, pg no 547 