<b>Significance of and Contributing Factors for a High Resistive Index on Doppler Sonography of the Hepatic Artery Immediately After Surgery:</b> Prognostic Implications for Liver Transplant Recipients

García-Criado, Ángeles; Gilabert, Rosa; Salmerón, Joan Manuel; Nicolau, Carlos; Vilana, R.; Bianchi, Luís; Buñesch, Laura; García‐Valdecasas, Juan Carlos; Rimola, Antoni; Brú, C.

doi:10.2214/ajr.181.3.1810831

Cited by 87 publications

(51 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…High HARI has not been associated with worsening of clinical course or graft function; it may be related to older donor age and prolonged cold ischaemia. 15 Furthermore, this present study also found that a high HARI was more frequent during the early postoperative period. This was probably a result of the hepatic buffer response.…”

Section: Discussionsupporting

confidence: 79%

Postoperative haemodynamic changes in transplanted liver: Long-term follow-up with ultrasonography

et al. 2014

View full text Add to dashboard Cite

Objective: To investigate haemodynamic changes in the transplanted liver without postoperative complications. Methods: Colour Doppler ultrasound was used to monitor recipients of liver transplants who had no postoperative complications. The haemodynamic data for the hepatic vasculature were compared at different time-points during the first 4 years after liver transplantation. Results: A total of 144 liver transplant patients were enrolled in the study. Portal vein flow velocity decreased significantly from 72.1 AE 30.3 cm/s at 1 day to 44.2 AE 20.1 cm/s at 1 month after liver transplantation. Hepatic artery flow velocity was 61.4 AE 33.2 cm/s at day 1; it then decreased slowly but significantly to 48.3 AE 20.4 cm/s at 3 years after transplantation. There were 81 (56.3%) patients with high hepatic artery resistance index (HARI) (>0.80) and 19 (13.2%) with low HARI (<0.50) measured at least once during the 4-year follow-up examination. Conclusions: Decreased portal vein flow velocity was the typical change observed during the first month after liver transplantation. Abnormal haemodynamic Doppler results should be interpreted with caution because they may not be clinically significant and may improve spontaneously.

show abstract

Section: Discussionsupporting

confidence: 79%

Postoperative haemodynamic changes in transplanted liver: Long-term follow-up with ultrasonography

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The clinical insignificance of this high resistance flow had also been demonstrated in several reports. 4,[18][19][20] Our results agree with the HA buffer response theory in which the HA shows compensatory vasoconstriction reducing the arterial blood flow in response to portal hyperperfusion, thus leading to a high RI. 21,22 This phenomenon had been demonstrated intraoperatively by temporary clamping of the PV, which resulted in improved HA flow.…”

Section: Omar Abdelaziz Et Al/experimental and Clinical Transplantatisupporting

confidence: 88%

“…19 Other theories have related the early and transient elevation of the HA RI after DDLT to the older donor grafts, prolonged period of cold ischemia and preservation injury, graft steatosis, and chronic cholestatic disease as an indication for trans plant. 18,20,23 In addition, a decreased HA RI (< 0.50) can also be observed in the early postoperative period, although it was less common than a high HA RI. These low HA RI values might be caused by surgical edema, with low HA RI values ordinarily returning to a normal level within 6 months.…”

Section: Omar Abdelaziz Et Al/experimental and Clinical Transplantatimentioning

confidence: 99%

Untitled

Abdelaziz

Emad‐Eldin²,

Hussein³

et al. 2017

Exp Clin Transplant

View full text Add to dashboard Cite

Objectives: Our aim was to investigate the early changes that occur after graft perfusion in livingdonor liver transplant by Doppler ultrasonography. Materials and Methods: We prospectively evaluated liver grafts of 30 patients who underwent living-donor liver transplant during an 18-month period and who were followed for 1 year postoperatively. The hepatic artery peak systolic velocity, resistivity index, portal vein velocity, portal vein anastomotic velocity ratio, and hepatic vein pattern were compared after excluding patients who developed vascular complications and acute rejection episodes. Results: We observed intraoperative increases in the mean hepatic artery peak systolic velocity (96.3 ± 65 cm/s), the resistivity index (0.78 ± 0.091), and the portal vein velocity (99.6 ± 48 cm/s), which started to normalize after 2 weeks. In comparing the mean portal vein velocity, portal vein anastomotic velocity ratio, hepatic artery peak systolic velocity, and resistivity index after excluding 5 patients who developed vascular complications, we observed overall significance levels of P < .001, P = .039, P < .001, and P = .040. After we excluded 9 patients who developed acute rejection, our comparison of the portal vein velocity, hepatic artery peak systolic velocity, and resistivity index showed overall significance (P < .001, P < .001, and P = .043). Conclusions: Early and transient increases in portal vein velocity, anastomotic velocity ratio, hepatic artery peak systolic velocity, and resistivity index are common after living-donor liver transplant, with significant declines in the first 2 weeks posttransplant.

show abstract

“…As a result, complete occlusion of the hepatic artery results in infarction or necrosis of the liver parenchyma and may lead to fulminant hepatic failure in the early post-transplantation period. Doppler US allows correct identification of hepatic artery thrombosis in up to 90% of cases (Crossin et al, 2003;Garcı´a-Criado et al, 2003;Glockner & Forauer 1999;Nghiem et al, 1996). At doppler US examination, there is usually complete absence of both proper hepatic and intrahepatic arterial flow (Chong, 2004;Kok T et al, 1998;Nghiem et al, 1996).…”

Section: Hepatic Artery Thrombosismentioning

confidence: 99%

“…MR venography can provide an excellent visualization of portal vein thrombosis and can facilitate the differentiation of thrombosis from slow flow (StaffordJohnson et al, 1998;Unsinn et al, 2003). At contrast material-enhanced CT, portal vein thrombosis is seen as a low-attenuation filling defect (Ametani et al, 2001;Garcı´a-Criado et al, 2003;Unsinn et al, 2003). Portal vein stenosis with thrombus formation in the immediate postoperative period is quickly diagnosed with Doppler US and is managed surgically.…”

Section: Portal Vein Thrombosismentioning

confidence: 99%

Minimal Invasive (Endovascular and Percutaneous) Treatment of Post Liver Transplantation Complications in Pediatrics

Kroma¹,

Lopera²,

Suri³

2012

Liver Transplantation - Technical Issues and Complications

View full text Add to dashboard Cite

Significance of and Contributing Factors for a High Resistive Index on Doppler Sonography of the Hepatic Artery Immediately After Surgery: Prognostic Implications for Liver Transplant Recipients

Cited by 87 publications

References 27 publications

Postoperative haemodynamic changes in transplanted liver: Long-term follow-up with ultrasonography

Postoperative haemodynamic changes in transplanted liver: Long-term follow-up with ultrasonography

Untitled

Minimal Invasive (Endovascular and Percutaneous) Treatment of Post Liver Transplantation Complications in Pediatrics

Contact Info

Product

Resources

About