Occlusive Portal Vein Thrombosis (OPVT)NCT07666256
Mesenteric Vein Access for OPVT-Related Recurrent Variceal Bleeding: An Ambispective Cohort
A study testing Percutaneous mesenteric vein-assisted interventional treatment in people with Occlusive Portal Vein Thrombosis (OPVT) and Cavernous Transformation of Portal Vein, run by Air Force Military Medical University, China at 1 site in China.
Trial summary
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in total interruption of portal venous inflow and representing the most severe form of portal vein thrombosis. Read more about this study
- Who is it for?
- Ages 18 to 75 years
- Conditions the study is for
- Occlusive Portal Vein Thrombosis (OPVT), Cavernous Transformation of Portal Vein, Gastroesophageal Varices Bleeding
- What is being tested?
- Percutaneous mesenteric vein-assisted interventional treatment
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 15 participants
- Where
- 1 siteChina
- Study dates
- 1 Jul 2026to 30 Jun 2028
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 75 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Confirmed OPVT, as demonstrated by contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI).
- History of at least two episodes of esophagogastric variceal bleeding.
- Ineligible for, or have previously failed, conventional transjugular intrahepatic portosystemic shunt (TIPS) or percutaneous transhepatic/transsplenic access approaches, including but not limited to extensive thrombosis of intrahepatic portal vein branches, prior splenectomy, or previous unsuccessful attempts.
- Child-Pugh score ≤12, with anticipated tolerance of the interventional procedure.
Who cannot join
- Thrombosis or severe stenosis of the superior mesenteric vein (SMV), precluding its use as a percutaneous access route.
- Severe cardiac, pulmonary, or renal insufficiency that precludes tolerance of the procedure.
- Uncorrectable coagulopathy.
- Life expectancy <3 months, or inability to comply with scheduled follow-up visits.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site
Air Force Medical University
Xi'an, Shaanxi, 710032
Jun Tie, M.D.,Ph.D., +862984771537, tiejun7776@163.com
About this study
Official title: Percutaneous Mesenteric Vein Access for Interventional Management of Recurrent Variceal Bleeding in Occlusive Portal Vein Thrombosis: An Ambispective Cohort Study
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in total interruption of portal venous inflow and representing the most severe form of portal vein thrombosis. A small proportion of patients may remain asymptomatic for prolonged periods because of sufficient collateral compensation; however, most develop complications of portal hypertension when collateral flow is inadequate, including gastroesophageal variceal bleeding and ascites. Among these, gastroesophageal variceal bleeding is the most life-threatening, and its management is more challenging-with a higher risk of rebleeding-than in patients without portal vein thrombosis.
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in total interruption of portal venous inflow and representing the most severe form of portal vein thrombosis. A small proportion of patients may remain asymptomatic for prolonged periods because of sufficient collateral compensation; however, most develop complications of portal hypertension when collateral flow is inadequate, including gastroesophageal variceal bleeding and ascites. Among these, gastroesophageal variceal bleeding is the most life-threatening, and its management is more challenging-with a higher risk of rebleeding-than in patients without portal vein thrombosis.
Read more
Transjugular intrahepatic portosystemic shunt (TIPS) is an effective minimally invasive therapy for portal hypertension-related complications; however, in OPVT, technical feasibility largely depends on successful portal vein recanalization. To improve TIPS success in OPVT, our group-together with domestic and international investigators-has explored several adjunctive access routes and technical modifications, including percutaneous transhepatic or transsplenic portal vein recanalization TIPS (PVR-TIPS); transjugular portal cavernous collateral-caval shunt (TCCS); transjugular mesenteric-caval shunt (TMCS); transjugular spleno-caval shunt (TSCS); and surgically assisted hybrid procedures. Although these strategies have improved technical success rates to some extent, their applicability remains limited. In patients with extensive thrombosis involving intrahepatic portal vein branches, in those without a feasible splenic venous puncture route, or in patients with prior splenectomy, percutaneous transhepatic and transsplenic approaches are often not possible. Moreover, in patients with poor hepatic reserve and/or ascites, laparotomy-assisted hybrid procedures substantially increase invasiveness and perioperative risk.
In this context, the present project aims to systematically investigate and evaluate ultrasound-guided percutaneous mesenteric vein (MV) puncture as an adjunctive access strategy for interventional treatment of OPVT. This technique uses ultrasound-guided percutaneous puncture of the MV to establish antegrade portal venous access, thereby facilitating subsequent portal vein recanalization and/or shunt creation.
Read the detailed description
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in interruption of portal venous inflow and representing a severe form of portal vein thrombosis. Although some patients may remain asymptomatic for prolonged periods because of collateral compensation, many develop clinically significant portal hypertension when collateral flow is inadequate-most notably gastroesophageal variceal bleeding and ascites. Gastroesophageal variceal bleeding is a major cause of morbidity and mortality and is often more difficult to control, with a higher risk of rebleeding, than variceal bleeding in patients without portal vein thrombosis.
Transjugular intrahepatic portosystemic shunt (TIPS) is an established minimally invasive therapy for complications of portal hypertension. In OPVT, however, technical feasibility often hinges on successful portal vein recanalization. Multiple adjunctive techniques have been developed to improve feasibility in selected patients, including percutaneous transhepatic or transsplenic portal vein recanalization TIPS (PVR-TIPS), portal cavernous collateral-caval shunt procedures, mesenteric-caval or spleno-caval shunts, and surgically assisted hybrid approaches. Despite these advances, a meaningful subset of patients remain poor candidates because of extensive intrahepatic portal branch thrombosis, absence of a feasible splenic puncture route, prior splenectomy, or prohibitive risk for laparotomy-assisted hybrid procedures (e.g., in patients with limited hepatic reserve and/or ascites).
This study will evaluate ultrasound-guided percutaneous mesenteric vein (MV) puncture as an adjunctive access strategy to enable interventional decompression of the portal venous system in OPVT. Using real-time ultrasound, percutaneous MV access is obtained to establish an antegrade working channel. This channel is then used to facilitate portal vein recanalization and/or shunt creation when standard access routes are not feasible or have failed.
Study design and setting: Ambispective, exploratory, single-center clinical study.
Population: Patients with imaging-confirmed OPVT and recurrent gastroesophageal variceal bleeding, particularly those in whom conventional interventional access routes (e.g., transjugular-only approaches, percutaneous transhepatic access, or transsplenic access) are limited, infeasible, or have been unsuccessful.
Intervention (Stepwise Intra-procedural Strategy)
After establishing MV access under ultrasound guidance, operators will follow a predefined escalation algorithm based on intra-procedural anatomy and technical feasibility:
MV-assisted PVR-TIPS (preferred): Antegrade catheter/guidewire manipulation via MV access to attempt recanalization of the occluded main portal vein trunk. A catheter or balloon may be positioned as a target to facilitate completion of a standard TIPS via the transjugular route.
MV-assisted collateral-to-caval shunt (secondary): If main portal vein recanalization is not achievable, selective catheterization of an eligible collateral (e.g., diameter ≥6 mm) may be performed, with target-marker assistance to create a collateral-to-inferior vena cava shunt via the transjugular route.
Extrahepatic MV-to-caval shunt (backup): If neither main portal vein recanalization nor a suitable collateral is available, an extrahepatic MV-to-inferior vena cava shunt tract may be created through the established MV access as an alternative portal decompression strategy.
Outcomes (Overview) The study will assess: (1) technical feasibility (e.g., successful MV access; successful creation of a functioning shunt via any pathway), (2) procedural safety (peri-procedural and follow-up complications), and (3) clinical effectiveness, including control of portal hypertension-related bleeding (e.g., rebleeding during follow-up) and other manifestations of portal hypertension, as applicable.
- Conditions
- Occlusive Portal Vein Thrombosis (OPVT), Cavernous Transformation of Portal Vein, Gastroesophageal Varices Bleeding
- Being tested
- Percutaneous mesenteric vein-assisted interventional treatment
- Keywords
- Occlusive portal vein thrombosis (OPVT), Cavernous Transformation of Portal Vein, Esophageal and gastric variceal bleeding, Transjugular intrahepatic portosystemic shunt, Superior Mesenteric Vein
- Medical subject headings
- Portal Vein, Cavernous Transformation Of
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Percutaneous mesenteric vein-assisted interventional treatmentProcedure or surgery
Intervention (stepwise intra-procedural strategy). After MV access is established under ultrasound guidance, operators will follow a predefined escalation algorithm based on anatomy and feasibility:
MV-assisted PVR-TIPS (preferred): Using antegrade catheter/guidewire manipulation via MV access, attempt recanalization of the occluded main portal vein trunk. A catheter or balloon may be positioned as a target to complete standard TIPS via the transjugular route.
MV-assisted collateral-to-caval shunt (secondary): If main portal vein recanalization is not achievable, catheterize an eligible collateral (e.g., ≥6 mm) and, with target-marker assistance, create a collateral-to-inferior vena cava shunt via the transjugular route.
Extrahepatic MV-to-caval shunt (backup): If neither main portal vein recanalization nor a suitable collateral is available, create an extrahepatic MV-to-inferior vena cava shunt tract through MV access as an alternative portal decompression strategy.
| Study group | Role | What they receive |
|---|---|---|
| Percutaneous mesenteric vein-assisted interventional treatment | Experimental | Eligible patients include those with imaging-confirmed OPVT and recurrent gastroesophageal variceal bleeding, particularly when conventional interventional access routes (e.g., transjugular-only approaches, percutaneous transhepatic access, or transsplenic access) are limited, infeasible, or have failed. Under real-time ultrasound guidance, percutaneous mesenteric vein (MV) access is obtained to establish an antegrade working channel, which is then used to facilitate portal vein recanalization and/or shunt creation. Receives: Procedure: Percutaneous mesenteric vein-assisted interventional treatment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Technical success of the index procedure (overall)
Successful creation of a functioning portosystemic shunt using the study strategy (MV-assisted PVR-TIPS, MV-assisted collateral-to-caval shunt, or extrahepatic MV-to-caval shunt), confirmed by completion angiography demonstrating shunt patency/flow and effective portal decompression as assessed intra-procedurally per operator judgment and standard imaging criteria.
Measured: During the procedure (index hospitalization)
Safety-major procedure-related adverse events
Incidence of major adverse events related to MV puncture and/or shunt creation (e.g., clinically significant intraperitoneal hemorrhage, bowel/mesenteric injury, sepsis, procedure-related death, or other events meeting predefined serious adverse event criteria).
Measured: From procedure through 30 days post-procedure.
Secondary outcomes (4)
Variceal rebleeding
Incidence of recurrent gastroesophageal variceal bleeding after the index procedure, defined clinically (e.g., hematemesis/melena with endoscopic and/or imaging confirmation when available) and requiring hospital presentation, transfusion, endoscopic therapy, radiologic intervention, or resulting in death.
Measured: 6 months post-procedure.
Shunt patency (primary patency)
Proportion of patients with a patent shunt without need for re-intervention, assessed by Doppler ultrasound and/or contrast-enhanced CT/MR venography per the follow-up schedule.
Measured: 6 months post-procedure.
Hepatic encephalopathy (new onset or worsening)
Incidence and severity of hepatic encephalopathy after the procedure, graded using a standardized clinical scale per institutional practice (e.g., West Haven criteria) and requiring initiation/escalation of therapy and/or hospitalization.
Measured: From procedure through 6 months post-procedure.
Overall survival
All-cause mortality following the index procedure.
Measured: 6 months post-procedure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jun 2026
- Study start1 Jul 2026 (estimated)
- Primary completion30 Jun 2028 (estimated)
- Study completion30 Jun 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Occlusive Portal Vein Thrombosis (OPVT)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 15 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Air Force Military Medical University, China
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tie Jun, The First Affiliated Hospital of Air Force Medical University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07666256
- Sponsor's protocol ID
- KY20262173-F-1
- Status last verified
- Jun 2026
- First submitted
- 18 Jun 2026
- Last updated
- 24 Jun 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 24 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Percutaneous Mesenteric Vein Access for Interventional Management of Recurrent Variceal Bleeding in Occlusive Portal Vein Thrombosis: An Ambispective Cohort Study
- ClinicalTrials.gov ID
- NCT07666256
- Acronym / sponsor ID
- KY20262173-F-1
- Conditions
- Occlusive Portal Vein Thrombosis (OPVT), Cavernous Transformation of Portal Vein, Gastroesophageal Varices Bleeding
- Keywords
- Occlusive portal vein thrombosis (OPVT), Cavernous Transformation of Portal Vein, Esophageal and gastric variceal bleeding, Transjugular intrahepatic portosystemic shunt, Superior Mesenteric Vein
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 15 participants (estimated)
- Lead sponsor
- Air Force Military Medical University, ChinaUniversity, hospital or other
- Study start
- 1 Jul 2026 (estimated)
- Primary completion
- 30 Jun 2028 (estimated)
- Study completion
- 30 Jun 2028 (estimated)
- First posted
- 24 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in total interruption of portal venous inflow and representing the most severe form of portal vein thrombosis. A small proportion of patients may remain asymptomatic for prolonged periods because of sufficient collateral compensation; however, most develop complications of portal hypertension when collateral flow is inadequate, including gastroesophageal variceal bleeding and ascites. Among these, gastroesophageal variceal bleeding is the most life-threatening, and its management is more challenging-with a higher risk of rebleeding-than in patients without portal vein thrombosis.
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in total interruption of portal venous inflow and representing the most severe form of portal vein thrombosis. A small proportion of patients may remain asymptomatic for prolonged periods because of sufficient collateral compensation; however, most develop complications of portal hypertension when collateral flow is inadequate, including gastroesophageal variceal bleeding and ascites. Among these, gastroesophageal variceal bleeding is the most life-threatening, and its management is more challenging-with a higher risk of rebleeding-than in patients without portal vein thrombosis.
Transjugular intrahepatic portosystemic shunt (TIPS) is an effective minimally invasive therapy for portal hypertension-related complications; however, in OPVT, technical feasibility largely depends on successful portal vein recanalization. To improve TIPS success in OPVT, our group-together with domestic and international investigators-has explored several adjunctive access routes and technical modifications, including percutaneous transhepatic or transsplenic portal vein recanalization TIPS (PVR-TIPS); transjugular portal cavernous collateral-caval shunt (TCCS); transjugular mesenteric-caval shunt (TMCS); transjugular spleno-caval shunt (TSCS); and surgically assisted hybrid procedures. Although these strategies have improved technical success rates to some extent, their applicability remains limited. In patients with extensive thrombosis involving intrahepatic portal vein branches, in those without a feasible splenic venous puncture route, or in patients with prior splenectomy, percutaneous transhepatic and transsplenic approaches are often not possible. Moreover, in patients with poor hepatic reserve and/or ascites, laparotomy-assisted hybrid procedures substantially increase invasiveness and perioperative risk.
In this context, the present project aims to systematically investigate and evaluate ultrasound-guided percutaneous mesenteric vein (MV) puncture as an adjunctive access strategy for interventional treatment of OPVT. This technique uses ultrasound-guided percutaneous puncture of the MV to establish antegrade portal venous access, thereby facilitating subsequent portal vein recanalization and/or shunt creation.
Detailed description
Occlusive portal vein thrombosis (OPVT) is defined as complete thrombosis of the main portal vein trunk, resulting in interruption of portal venous inflow and representing a severe form of portal vein thrombosis. Although some patients may remain asymptomatic for prolonged periods because of collateral compensation, many develop clinically significant portal hypertension when collateral flow is inadequate-most notably gastroesophageal variceal bleeding and ascites. Gastroesophageal variceal bleeding is a major cause of morbidity and mortality and is often more difficult to control, with a higher risk of rebleeding, than variceal bleeding in patients without portal vein thrombosis.
Transjugular intrahepatic portosystemic shunt (TIPS) is an established minimally invasive therapy for complications of portal hypertension. In OPVT, however, technical feasibility often hinges on successful portal vein recanalization. Multiple adjunctive techniques have been developed to improve feasibility in selected patients, including percutaneous transhepatic or transsplenic portal vein recanalization TIPS (PVR-TIPS), portal cavernous collateral-caval shunt procedures, mesenteric-caval or spleno-caval shunts, and surgically assisted hybrid approaches. Despite these advances, a meaningful subset of patients remain poor candidates because of extensive intrahepatic portal branch thrombosis, absence of a feasible splenic puncture route, prior splenectomy, or prohibitive risk for laparotomy-assisted hybrid procedures (e.g., in patients with limited hepatic reserve and/or ascites).
This study will evaluate ultrasound-guided percutaneous mesenteric vein (MV) puncture as an adjunctive access strategy to enable interventional decompression of the portal venous system in OPVT. Using real-time ultrasound, percutaneous MV access is obtained to establish an antegrade working channel. This channel is then used to facilitate portal vein recanalization and/or shunt creation when standard access routes are not feasible or have failed.
Study design and setting: Ambispective, exploratory, single-center clinical study.
Population: Patients with imaging-confirmed OPVT and recurrent gastroesophageal variceal bleeding, particularly those in whom conventional interventional access routes (e.g., transjugular-only approaches, percutaneous transhepatic access, or transsplenic access) are limited, infeasible, or have been unsuccessful.
Intervention (Stepwise Intra-procedural Strategy)
After establishing MV access under ultrasound guidance, operators will follow a predefined escalation algorithm based on intra-procedural anatomy and technical feasibility:
MV-assisted PVR-TIPS (preferred): Antegrade catheter/guidewire manipulation via MV access to attempt recanalization of the occluded main portal vein trunk. A catheter or balloon may be positioned as a target to facilitate completion of a standard TIPS via the transjugular route.
MV-assisted collateral-to-caval shunt (secondary): If main portal vein recanalization is not achievable, selective catheterization of an eligible collateral (e.g., diameter ≥6 mm) may be performed, with target-marker assistance to create a collateral-to-inferior vena cava shunt via the transjugular route.
Extrahepatic MV-to-caval shunt (backup): If neither main portal vein recanalization nor a suitable collateral is available, an extrahepatic MV-to-inferior vena cava shunt tract may be created through the established MV access as an alternative portal decompression strategy.
Outcomes (Overview) The study will assess: (1) technical feasibility (e.g., successful MV access; successful creation of a functioning shunt via any pathway), (2) procedural safety (peri-procedural and follow-up complications), and (3) clinical effectiveness, including control of portal hypertension-related bleeding (e.g., rebleeding during follow-up) and other manifestations of portal hypertension, as applicable.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Percutaneous mesenteric vein-assisted interventional treatment | Experimental | Procedure: Percutaneous mesenteric vein-assisted interventional treatmentEligible patients include those with imaging-confirmed OPVT and recurrent gastroesophageal variceal bleeding, particularly when conventional interventional access routes (e.g., transjugular-only approaches, percutaneous transhepatic access, or transsplenic access) are limited, infeasible, or have failed. Under real-time ultrasound guidance, percutaneous mesenteric vein (MV) access is obtained to establish an antegrade working channel, which is then used to facilitate portal vein recanalization and/or shunt creation. |
Who may qualify
- Ages
- 18 to 75 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Confirmed OPVT, as demonstrated by contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI).
- History of at least two episodes of esophagogastric variceal bleeding.
- Ineligible for, or have previously failed, conventional transjugular intrahepatic portosystemic shunt (TIPS) or percutaneous transhepatic/transsplenic access approaches, including but not limited to extensive thrombosis of intrahepatic portal vein branches, prior splenectomy, or previous unsuccessful attempts.
- Child-Pugh score ≤12, with anticipated tolerance of the interventional procedure.
Key exclusion criteria (4 listed)
- Thrombosis or severe stenosis of the superior mesenteric vein (SMV), precluding its use as a percutaneous access route.
- Severe cardiac, pulmonary, or renal insufficiency that precludes tolerance of the procedure.
- Uncorrectable coagulopathy.
- Life expectancy <3 months, or inability to comply with scheduled follow-up visits.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Percutaneous mesenteric vein-assisted interventional treatmentIntervention (stepwise intra-procedural strategy). After MV access is established under ultrasound guidance, operators will follow a predefined escalation algorithm based on anatomy and feasibility: MV-assisted PVR-TIPS (preferred): Using antegrade catheter/guidewire manipulation via MV access, attempt recanalization of the occluded main portal vein trunk. A catheter or balloon may be positioned as a target to complete standard TIPS via the transjugular route. MV-assisted collateral-to-caval shunt (secondary): If main portal vein recanalization is not achievable, catheterize an eligible collateral (e.g., ≥6 mm) and, with target-marker assistance, create a collateral-to-inferior vena cava shunt via the transjugular route. Extrahepatic MV-to-caval shunt (backup): If neither main portal vein recanalization nor a suitable collateral is available, create an extrahepatic MV-to-inferior vena cava shunt tract through MV access as an alternative portal decompression strategy. | Procedure or surgery | Percutaneous mesenteric vein-assisted interventional treatment |
Primary outcome
Technical success of the index procedure (overall)
Time frame: During the procedure (index hospitalization)
Successful creation of a functioning portosystemic shunt using the study strategy (MV-assisted PVR-TIPS, MV-assisted collateral-to-caval shunt, or extrahepatic MV-to-caval shunt), confirmed by completion angiography demonstrating shunt patency/flow and effective portal decompression as assessed intra-procedurally per operator judgment and standard imaging criteria.
Safety-major procedure-related adverse events
Time frame: From procedure through 30 days post-procedure.
Incidence of major adverse events related to MV puncture and/or shunt creation (e.g., clinically significant intraperitoneal hemorrhage, bowel/mesenteric injury, sepsis, procedure-related death, or other events meeting predefined serious adverse event criteria).
4 secondary outcomes
Variceal rebleeding
Time frame: 6 months post-procedure.
Shunt patency (primary patency)
Time frame: 6 months post-procedure.
Hepatic encephalopathy (new onset or worsening)
Time frame: From procedure through 6 months post-procedure.
Overall survival
Time frame: 6 months post-procedure
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Jun 2026.
- Individual participant dataSharing planned: Yes
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Percutaneous mesenteric vein-assisted interventional treatment in people with Occlusive Portal Vein Thrombosis (OPVT) and Cavernous Transformation of Portal Vein, run by Air Force Military Medical University, China at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 24 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Jun Tie (+862984771537, tiejun7776@163.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Technical success of the index procedure (overall) (time frame: During the procedure (index hospitalization)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Jun 2026.