title: Assessment of portasystemic shunt patency by estimation of D-xylose excretion.
abstract: The D-xylose excretion test appears to be a useful method of monitoring shunt patency after a portasystemic venous anastomsis for portal hypertension. A 5-hour urinary excretion greater than 6 g appears an acceptable indicator that the shunt is patent. A second criterion of patency is an increase of 4 g or more over the result of preoperative tests. If the excretion rate falls in the postoperative period or remains less than 4-2 g/5 h, the anastomosis may be assumed to be occluded.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D006975:Hypertension, Portal / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011167:Portacaval Shunt, Surgical; D011183:Postoperative Complications / Q000175:diagnosis; D012082:Renal Veins / Q000601:surgery; D013162:Splenic Vein / Q000601:surgery; D014994:Xylose / Q000652:urine*
chemical_list: D014994:Xylose