|Year : 2019 | Volume
| Issue : 1 | Page : 65-67
Treatment of early hepatic venous outflow obstruction after living donor-related liver transplantation by the insertion of expandable metallic stent
KM Mahendra, Gaurav Gangwani, Ajit Yadav, Arun Gupta
Department of Interventional Radiology, Sir Ganga Ram Hospital, GRIPMER University, New Delhi, India
|Date of Web Publication||29-Mar-2019|
Dr. K M Mahendra
Sir Ganga Ram Hospital, New Delhi - 110 060
Source of Support: None, Conflict of Interest: None
Hepatic venous outflow obstruction (HVOO) is rare but serious complication after right lobe living donor liver transplantation (LDLT). Failure to identify this complication early can result in graft failure and even death. The early diagnosis and management of HVOO is very important. We report a case with this complication treated by endovascular stent placement in the early period after right lobe LDLT and review-related reports to explore the possible mechanism. A 43-year-old male with chronic liver disease underwent right lobe LDLT. On postoperative day 2, his liver function deteriorated. Hepatic venography showed an obstruction and thrombosis of mechanical heart valve with an element of torsion of the venous drainage proximal to the anastomosis of the right hepatic venous orifice and inferior vena cava. The obstruction was successfully treated by insertion of an expandable metallic stent. The result demonstrates that stent placement for obstruction is safe and effective.
Keywords: Treatment early hepatic venous outflow obstruction liver donor related liver transplantation insertion of expandable metallic stent, hepatic venous outflow obstruction, stenting, liver transplantation
|How to cite this article:|
Mahendra K M, Gangwani G, Yadav A, Gupta A. Treatment of early hepatic venous outflow obstruction after living donor-related liver transplantation by the insertion of expandable metallic stent. Indian J Transplant 2019;13:65-7
|How to cite this URL:|
Mahendra K M, Gangwani G, Yadav A, Gupta A. Treatment of early hepatic venous outflow obstruction after living donor-related liver transplantation by the insertion of expandable metallic stent. Indian J Transplant [serial online] 2019 [cited 2020 Feb 24];13:65-7. Available from: http://www.ijtonline.in/text.asp?2019/13/1/65/255179
| Introduction|| |
With the increase of living donor liver transplantation (LDLT) cases, management of hepatic venous outflow obstruction (HVOO) that can cause hepatic graft dysfunction and graft loss has become an important issue. This report describes a case of early HVOO after LDLT which was successfully treated with the endovascular stent placement. An integrated surgical and radiological approach is required for the management of anastomotic complications in liver transplants.
| Case Report|| |
A 43-year-old male with a history of decompensated chronic liver disease was admitted for LDLT. Intraoperative Doppler ultrasound showed no evidence of either stenosis or obstruction of the hepatic arterial blood flow, portal vein, and hepatic vein. No areas of graft were congested. On postoperative day (POD) 1, serum glutamic-oxaloacetic transaminase and serum glutamic-pyruvic transaminase were raised to 470 and 502, respectively. Prothrombin-international normalized ratio was deranged. Routine Doppler showed monophasic waveforms involving right hepatic vein (RHV). The patient was taken for angiography and underwent hepatic venography, showing stenosis of RHV at the anastomotic site with an element of torsion of venous drainage [Figure 1]. Middle hepatic vein (MHV) could not be cannulated due to acute angle and thrombosis of the whole of MHV. The pressure gradient between the right atrium and intrahepatic vein was approximately 20 mmHg. Immediately, we inserted a self-expandable metallic stent (10 mm diameter and length of 40 mm) into the RHV through the internal jugular vein, and pressure gradient across the venous stenosis was successfully reduced to 4 mmHg. There were no intervention-related complications [Figure 2], [Figure 3], [Figure 4]. The patient was extubated on POD 2. The aspartate aminotransferase and alanine aminotransferase showed decreasing trend. In the view of continuous drain output, interventional radiology opinion sought, and percutaneous catheter drainage was placed in the perihepatic and pelvic collection. He has remained asymptomatic.
|Figure 1: 43-year-old male patient with day 2 post living donor liver transplantation. Hepatic venogram showing tortuous stenotic hepatic venous outflow. The pressure gradient between the right atrium and the intrahepatic vein was 20 mmHg|
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|Figure 3: Placement of expandable metallic stent in the right hepatic vein|
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|Figure 4: 43-year-old male patient with day 2 post living donor liver transplantation. Hepatic venogram after placement of the expandable metallic stent revealed free flow of contrast agent into the inferior vena cava. The gradient decreased to 4 mmHg after stent placement|
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| Discussion|| |
Right hepatic LDLT is considered to be challenging due to the presence of hepatic venous anatomical variants and complexity involved in the venous anastomosis.
Early postoperative period hepatic venous complications are likely due to discordance between liver size of donor and recipient, twisting of venous trunk due to hypertrophy of liver parenchyma, and kinking of the redundant hepatic vein. Fibrosis of anastomotic site is likely to cause hepatic venous complication in late postoperative period.
Small length of the hepatic vein is one of the causative factor for HVOO. Improper evaluation of hepatic venous anatomy in pre operative period leads to hepatic venous congestion.
As compared to the orthotopic liver transplantation, in LDLT there is mismatch of anastomotic orifice of IVC and hepatic veins of donor and recipient, partial liver grafts grow significantly after transplantation and causes anastomotic orifice mismatch.
Venous outflow obstruction can result from wide range of movements of graft in large sub hepatic space due to the twisting of venous anastomosis.
The signs and symptoms of HVOO are new-onset ascites, variceal bleeding, splenomegaly, abnormal liver function test, and renal insufficiency. When the recipient is suspected of having HVOO, confirmatory imaging of Doppler and biphasic computed tomography scan should be done. Early HVOO can be determined by the monophasic Doppler waveforms, venography and pressure measurements. Most venographic studies have adopted a pressure gradient of more than 10 mmHg for diagnosis of clinically significant HVOO.
Endovascular balloon angioplasty and stent placements are preferred in the treatment of early HVOO and avoids the surgical risks and helps in the management of twisted hepatic veins.
Careful deployment of stents and removal of stent introducer is very helpful in avoiding stent related complications like arrhythmias and migration. Fibrotic stenosis are better managed by balloon expandable stents due to its ability to tolerate external pressure, self expandable stents have better radial compliance. Primary stenting is preferred over balloon angioplasty in HVOO, which avoids the rupture of the fresh anastomosis and may be ineffective in removing the various etiologies of HVOO in the early stage. Primary stent placements play an effective role in the management of early HVOO and have good patency rates in long term.
In few selected patients Percutaneous Transluminal Angioplasty can be considered for stenosis at the IVC anastomosis.
| Conclusion|| |
We report a case of early hepatic venous stenosis after right lobe LDLT treated by the insertion of expandable metallic stent, and the stent placement for acute venous obstruction is safe and effective even during immediate postoperative period. Expandable metallic stents are preferred in cases of early post transplant HVOO.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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