Percutaneous Microwave Ablation Under Ultrasound Guidance for Liver Cancer: a Multicenter Analysis

Study Overview
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Brief Summary
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Ultrasound-guided percutaneous MWA of liver cancer is a relatively new technique with favorable long-term outcomes.Butthe results are mainly from single center reports.A larger scale data need to be analyzed to evaluate the technique. This study is designed to investigated the efficacy of cooled-tip microwave ablation (MWA) for primary liver cancer (PLC) and analyzed the prognostic factors on a multicenter database.Between January 2013 and December 2018, all the PLC patients underwent ultrasound-guided percutaneous cooled-tip MWA as a primary treatment will be enrolled from at least ten Chinese institutions with different levels of MWA experience. All the patients will be closely followed up until June 2019. Clinicopathologic data, recurrence and survival estimates, complications and prognosis-relative factors will be measured.

Official Title
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Percutaneous Microwave Ablation Under Ultrasound Guidance for Primary Liver Cancer: a Multicenter Analysis

Conditions
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Liver Neoplasms

Intervention / Treatment
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* Procedure: microwave ablation device


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: absence of ascites or the depth of ascites on US detection less than 4 cm; a normal serum total bilirubin level or less than 60 µmol/L; a normal albumin level or not less than 30 g/L; for radical treatment, single lesion of 8 cm or smaller, three or fewer multiple lesions with a maximum diameter of 4 cm or less, absence of portal vein cancerous thrombus or extrahepatic metastases; for palliative treatment, those with large or multiple lesions, suffering multiple metastases and unsuitable for other modalities can be considered to undergo the MWA on the condition of good hepatic function and blood coagulation function to tolerate the procedure. Exclusion Criteria: Contraindications include patients who have clinical evident liver failure, such as massive ascites or hepatic encephalopathy or with a trance-like state; severe blood coagulation dysfunction (prothrombin time of more than 30 seconds, prothrombin activity less than 40%, and platelet count less than 30 cells×109/L); high intrahepatic tumor burden (tumor volume >70% of the target liver volume or multiple tumor nodules) or high extrahepatic tumor burden; acute or active inflammatory and infectious lesions at any organ; acute or severe chronic renal failure, pulmonary insufficiency or heart dysfunction; relative contraindication concerns medical risk for the tumor proximity to diaphragm, gastrointestinal tract, gallbladder, pancreas, hepatic hilum and major bile duct or vessels, which may require adjunctive techniques to prevent off-target heating of adjacent structures during the ablation procedure.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: microwave ablation<br>Antenna in the microwave ablation device was percutaneously inserted into the tumor and placed at designated place under US guidance. For tumors less than 1.5 cm, one antenna was inserted and for tumors measuring 1.5 cm or greater, two antennae were inserted in parallel with an inter-antenna distance of 1.0-2.5 cm, which were used simultaneously during MWA to obtain larger ablation zone. A 20G thermocouple was inserted about 0.5-1 cm away from the tumor for real-time temperature monitoring during MWA. MW emission didn't stop until the heat-generated hyperechoic water vapor completely encompassed the entire tumor and the measured temperature reached 60°C or remained above 54°C for at least three minutes. | Procedure: microwave ablation device<br>* Microwave ablation is a technique that uses thermal therapy to induce complete necrosis of tumor in situ by using microwave ablation device.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| overall survival |  | 5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| intrahepatic metastasis |  | 5 years | 
| extrahepatic metastasis |  | 5 years | 
| local tumor progress |  | 5 years | 
| complication | number of participants with side effect and major complication | 1 month | 
| disease free survival |  | 5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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microwave, Multicenter study