Sandow, Tyler A.; Bluth, Edward I.; Lall, Neil U.; Luo, Qingyang; Sternbergh, W. Charles, III
Objectives We sought to assess midterm sonographic findings in patients after stenting for hepatic artery stenosis.; Methods Thirty-nine hepatic artery stent procedures were performed for hepatic artery stenosis after liver transplantation between September 2009 and December 2013. Thirty cases were technically successful and met the minimum follow-up time (76 days, defined by earliest diagnosed stenosis). Routine ultrasound surveillance was obtained on all patients, and statistical analysis of the findings in the patency and restenosis groups was performed.; Results Of the 30 cases, restenosis occurred 9 times in 6 patients. Mean follow-up was 677 days. Mean time to restenosis was 267 days. Five cases (56%) were identified within the first 6 months after stent placement. Four cases (44%) were recognized in the second year after stent placement. Prior to the sonographic diagnosis of restenosis, the mean resistive indices of the main (.64 versus.57, P <.0001), left (.63 versus.54, P <.0001), right anterior (.60 versus.52, P <.0001), and right posterior (.60 versus.53, P =.001) hepatic artery branches differed among patency and restenosis groups, respectively. The mean peak systolic velocity also differed significantly between the 2 groups: 254 cm/sec in patients with eventual restenosis versus 220 cm/sec in patients without restenosis (P =.02).; Conclusions The sonographic evaluation of hepatic artery stenosis remains critical during the first 2 years after stent placement. While the vast majority of patients do not restenose, resistive index and peak systolic velocity differed significantly between the 2 groups and may he prognostic surveillance markers for the development of restenosis.