Small Diameter TIPS in Patients with Severe Liver Atrophy and Variceal Bleeding

Summary

Portal hypertension is the most common complication in patients with end-stage liver cirrhosis. Portal hypertension-related complications, such as variceal bleeding, often lead to a poor prognosis. Transjugular intrahepatic portosystemic shunt (TIPS) is an effective treatment strategy for managing portal hypertension-related variceal bleeding. However, the appropriate diameter of the covered stent during the TIPS procedure remains a subject of debate. To date, there is a lack of strong evidence regarding the most suitable covered stent diameter.

In theory, a shunt with a larger diameter can result in better stent patency, but it can also lead to reduced liver function and a higher incidence of hepatic encephalopathy (HE) after the TIPS procedure. Therefore, the choice of covered stent diameter needs to consider the factors of shunt efficacy and postoperative liver function. At present, the diameters of TIPS-dedicated stents are typically either 8 or 10 mm. Whether stents with these two diameters can meet all the requirements of TIPS procedures is currently unknown. Different races, cirrhosis etiologies, and liver volumes may require different TIPS diameters. For example, in China, most cases of liver cirrhosis are caused by hepatitis B, resulting in the patient having a smaller liver volume. Therefore, in most Chinese studies, the diameters of TIPS stents are mainly 8 mm. Previous studies have shown that TIPS with an 8-mm covered stent has a shunt effect similar to that of a 10-mm covered stent; however, the incidence of postoperative HE is significantly reduced with an 8-mm stent (27% vs. 43%)14. Nevertheless, an 8-mm covered TIPS still has a high incidence of HE.

The residual liver volume is small for patients with severe atrophic cirrhosis of the liver, and whether this necessitates a covered TIPS with a smaller diameter requires further study. However, there is still no dedicated TIPS stent that is \<8 mm in diameter. In this study, we propose an innovative strategy for the creation of a 6-mm shunt to determine if it can achieve a shunt effect similar to that of an 8-mm covered TIPS and reduce the incidence of HE in patients with severe atrophic liver cirrhosis.

Conditions

• Portal Hypertension Related to Cirrhosis

Interventions

DEVICE

During TIPS operation, shunt diameter or diameter of covered stent

Transjugular intrahepatic portosystemic shunt (TIPS) is an effective treatment strategy for managing portal hypertension-related variceal bleeding. However, the appropriate diameter of the covered stent during the TIPS procedure remains a subject of debate. To date, there is a lack of strong evidence regarding the most suitable covered stent diameter. Due to the lack of a dedicated 6-mm covered stent, we first released a 6-mm diameter stent (SD Express; Boston Scientific Co., or Luminexx; Bard Medical Division) in the liver parenchymal segment of the shunt, and then released an 8-mm TIPS stent (Viatorr; WL Gore \& Associates) to create a final 6-mm shunt.

DEVICE

During TIPS operation, shunt diameter or diameter of covered stent

After successful puncture, in the 8-mm shunt group, a balloon with a diameter of 6 mm was used to expand the shunt, and then an 8-mm covered stent was implanted (Viatorr; WL Gore \& Associates, Inc.).

Sponsors & Collaborators

• Huang Mingsheng

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2024-09-15

Primary Completion

2027-08-15

Completion

2028-09-15

FDA Device

Yes