title: Hepatic artery stenosis and thrombosis in transplant recipients: Doppler diagnosis with resistive index and systolic acceleration time.
abstract: OBJECTIVE
  To assess the value of resistive index (RI) and systolic acceleration time (SAT) for diagnosis of stenoses and thromboses of the hepatic artery in liver transplant recipients.
  
  
  METHODS
  Doppler sonograms and angiograms in 125 liver transplant recipients were correlated and analyzed for any statistically significant difference in the RI or SAT of patients with and without arterial stenosis or thrombosis. Sensitivity and specificity were calculated for RI, SAT, peak arterial systolic velocity, and absence of arterial flow.
  
  
  RESULTS
  Forty-seven patients had a marked stenosis; 16 had thrombosis. There was a statistically significant difference (P < .05) in the RI and SAT of patients with stenosis or thrombosis versus those with normal arteries but not in patients with stenosis versus thrombosis. RI and SAT parameters allowed detection of abnormalities not found with peak velocity and no-flow parameters. Combined parameters produced 97% sensitivity and 64% specificity for marked arterial disease.
  
  
  CONCLUSIONS
  Doppler spectral wave form analysis provides excellent screening for detection of hepatic allograft arterial stenosis or thrombosis.
authors.affiliation: Department of Radiology, University of Pittsburgh Medical Center, PA 15213.
authors.forename: G D
authors.initials: GD
authors.lastname: Dodd
authors.forename: D S
authors.initials: DS
authors.lastname: Memel
authors.forename: A B
authors.initials: AB
authors.lastname: Zajko
authors.forename: R L
authors.initials: RL
authors.lastname: Baron
authors.forename: L A
authors.initials: LA
authors.lastname: Santaguida
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology; D001783:Blood Flow Velocity; D002648:Child; D002675:Child, Preschool; D003251:Constriction, Pathologic; D005260:Female; D006499:Hepatic Artery / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D007223:Infant; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011446:Prospective Studies; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013599:Systole; D013927:Thrombosis / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology; D014463:Ultrasonography; D014655:Vascular Resistance