Arterial waveforms on doppler ultrasonography predicting or supporting hepatic arterial thrombosis in liver transplantation

Color Doppler sonography in the diagnosis and monitoring of arterial complications after liver transplantation

“…[20][21][22][23][24] In the other 6 thrombosis cases, in which the thrombosis manifested at least 3 months after the transplant and followed a much more gradual course, 13 the Doppler imaging pattern was different: The hepatic artery could not be detected at the hilum, but arterial signals with tardus parvus waveforms were present at the main arterial branches. 7,8,11,[25][26][27][28] The persistence of hepatic arterial perfusion 14,29 in these cases despite thrombosis of the main trunk was due to the development of compensatory collateral vessels, 25,26 confirmed on angiography, originating mainly near the superior mesenteric and phrenic arteries.…”

Doppler Ultrasonographic Findings on Hepatic Arterial Vasospasm Early After Liver Transplantation

“…Therefore, they suggested using this absent diastolic Doppler waveform to predict or support the diagnosis of post-transplant HAT. [7][8][9] However, others found that it was poorly associated with HAT because the incidence of HAT was low among patients who had this highly resistant arterial flow. 10,11 Lacking a proper model or method for investigators to prove the causes, so far no one has had a clear answer to the question of what this ultrasonographic finding means, although one report mentioned that this phenomenon might be related to arterial vasospasm.…”

“…If arterial flow is obstructed distally by thrombosis, high-resistant arterial flow will be obtained proximally to the obstructed site. 9 This means that during certain circumstances, HAT may share a common DUS appearance, absence of antegrade diastolic flow with reversal of flow, with hepatic arterial vasospasm. Garcia-Criado et al 16 also seen in its major branches in the patients whose intrahepatic arterial flow could be traced.…”

Early detection of hepatic artery thrombosis after liver transplantation by Doppler ultrasonography: prognostic implications.

“…11 The diagnosis of HAT was established if the arterial Doppler signal was absent along the course of the main hepatic artery and its branches inside the liver. There was an elevated suggestion of HAT when an absence of diastolic flow at the common hepatic artery (RI = 1) along with an absence of intrahepatic flow 12 or a lowresistance signal (RI < 0.55) 13 was found in patients with clinical or analytical data suggesting HAT. When these Doppler abnormalities were found in asymptomatic patients, follow-up (<72 h) DUS was carried out.…”