Periinterventional Coagulation Management of Patients Undergoing a TIPS (TIPSprosp)

Medical University of Graz

Status: Enrolling

Conditions: Liver Cirrhosis

Treatments: Procedure: standard of care; Procedure: thrombelastogram

Study type: Interventional

Funder types: Other

Identifiers

NCT04421924

TIPS-prospective

Details and patient eligibility

About

Assess whether a pre-interventional thrombelastography guided algorithm for assessing and correction of coagulation status in cirrhotic patients is safe and effective

Full description

Transjugular intrahepatic portosystemic shunt (TIPS) is a very effective procedure to treat complications of portal hypertension in liver cirrhosis. TIPS implantation is indicated in cirrhotic patients to treat or prevent portal hypertensive bleeding and to treat refractory ascites.

During this procedure an artificial connection between portal vein and hepatic vein is placed via an image-guided endovascular approach. Although the procedure is very effective and reasonably safe, several complications can occur.

Due to the underlying cirrhosis, morbidity and mortality of TIPS is high, with a 30-day mortality between 7 and 20%. Procedural site complications (transhepatic and transvenous access), bleeding, development of hepatic encephalopathy or other organ complications and stent complications comprise a considerable risk to the patients, however, the improvement of mortality, renal function and liver function outweighs the risks of the procedure. Optimal patient selection and preoperative preparation is crucial to avoid complications of this procedure.

In liver cirrhosis, coagulation disturbances are common. In hepatic insufficiency, a balanced reduction in the levels of most of pro- and anticoagulant proteins produced in the liver does not impair thrombin generation until levels are quite low. However, the ability of the coagulation system to tolerate or recover from an insult is markedly impaired in liver disease. This allows the coagulation system to be more easily tipped into a state favouring either haemorrhage or thrombosis. The American Gastroenterology Association has recently published best practice advices to manage coagulation in cirrhosis. This review concludes that commonly used global coagulation tests are not optimal to assess the risk of bleeding in cirrhosis. A randomized controlled trial showed, that the use of thrombelastography (TEG) to assess coagulation in cirrhosis resulted in a significantly lower usage of blood products with no increase in bleeding rates.

The bleeding risk for TIPS implantation is not well studied, ranging from 0.6-4.3% of fatal bleeding complications in older uncontrolled case series. No evidenced-based recommendations exist for the correction of coagulation abnormalities before TIPS - and the few existing recommendations are not backed with evidence but rather "eminence based". Currently, global tests of coagulation (prothrombin time and platelet count) are used to guide coagulation correction. Mostly, cut-offs without sufficient evidence (PT >50%/ INR >1.8 and platelets >50 G/L) are used for correction of coagulation.

Also, the risk of stent thrombosis needs to be considered, therefore "blind" substitution of clotting factors or platelet transfusions is not advisable. Unfortunately, the study by De Pietri et al. (6) did only include one patient undergoing TIPS (in the standard of care (SOC) arm), therefore it is yet unknown, whether TEG is useful for guiding the correction of coagulation abnormalities in cirrhosis.

The aim of this trial is to assess, whether TEG guided pre-interventional assessment and correction of coagulation in cirrhotic patients is safe and effective

The study will be performed as a single-center, open-label, randomized prospective cohort study

Enrollment: 39 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

inclusion criteria

• Liver cirrhosis
• >18 years
• Indication for TIPS implantation
• Ability to sign informed consent exclusion criteria
• Contraindications against TIPS implantation
• Hepatocellular carcinoma BCLC D
• Ongoing bleeding
• pre-existing anticoagulant therapy at time of inclusion
• administration of blood products within 1 week prior to the enrolment
• Other malignancies that lead to an impaired 90-day survival
• Inherit blood clotting disorders
• Hepatic encephalopathy grade 3 or 4
• any other condition or circumstance, which, in the opinion of the investigator, would affect the patient's ability to participate in the protocol

Trial design

Primary purpose: Diagnostic

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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39 participants in 2 patient groups

Thrombelastogram (TEG)

Experimental group

Description:

Patients in the TEG group will receive prothrombin complex concentrates (PCC) at a dose of 10 IE/kg of ideal body weight, when R-time was greater than 40 minutes (2400 sec) and they will receive platelet transfusion in the amount of 1 apheresis unit when MA was below 30 mm.

Treatment:

Procedure: thrombelastogram

Standard of Care (SOC)

Experimental group

Description:

In the SOC group, patients will receive PCC at the dose of 10 IE /kg of ideal body weight when the PT is below 50% and/or INR\>1.8 and/or received platelet transfusion in the amount of 1 apheresis when platelet count is below 50 G/L

Treatment:

Procedure: standard of care