Pre-revision transjugular intrahepatic portosystemic shunt (TIPS) volume flow comparison between cases not revised or revised with unchanged portosystemic pressure gradient (PSPG) and cases revised with decreased PSPG for (a) all TIPS cases and (b) excluding two TIPS cases, i.e., three data points (*,+,†), for reasons as described in the text. Error bars indicate standard error of the mean.