NCT01773538

Diagnosis of Covert/Minimal Hepatic Encephalopathy by Means of Continuous Reaction Time Measurement

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 136 (actual)
• Sponsor: Mette Munk Lauridsen · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The investigators wish to investigate how the Continuous Reaction Time (CRT) method can be used in the diagnosis and monitoring of covert hepatic encephalopathy (cHE)in patients with cirrhosis of the liver. The hypothesis is that the CRT method (duration 10-2 minutes) can serve as a tool in the diagnosis and monitoring of cHE and is an alternative to using the Portosystemic Encephalopathy Test (PSE)(duration 20-25 minutes).

Detailed description

Objective: The aim of this project is to investigate whether continuous reaction time measurements (CRT) are suitable as a screening and monitoring tool for covert hepatic encephalopathy (c/mHE). Method: Sub-protocol 1: As a part of this PhD protocol 100 healthy individuals and 50 with chronic disease (not liver cirrhosis) will be tested using the CRT and PSE tests. This is to determine the normal range for the PSE test in the Danish population. Sub-protocol 2: A total of 120 (aprox. 145 to adjust for drop outs) patients with liver cirrhosis from two Danish hospitals will be examined with both CRT and with the test that is the closest we get to a gold standard, namely portosystemic encephalopathy test (PSE). We wish to examine if the CRT test agrees with the PSE test, which may be to time consuming to perform in everyday clinical practice, and with quality of life scores (SF-36 and Sickness Impact Profile). The relationship between the CRT and PSE test and various blood tests and the Charlston co-morbidity score will also be examined. Sub-protocol 3: Forty-four of the 120 included patients will, regardless of CRT test result, be randomized to treatment with lactulose, rifaximin and branched chain amino acids (BCAA) or placebo lactulose, rifaximin and BCAA. This is to evaluate whether the CRT method is able to detect a response to treatment, and see if changes in psychometric tests (PSE and CRT) are in accordance with quality of life scores and predicts subsequent development of overt hepatic encephalopathy. Perspective: CRT method should, if it proves good enough, continue to be the Danish test of choice and hopefully be more widely used in our country. The validation of tests for the diagnosis of covert hepatic encephalopathy will give cirrhotic patients with covert hepatic encephalopathy and reduced quality of life the best opportunity to be diagnosed and offered appropriate treatment. If the CRT method is not able to identify a population that benefits from anti-encephalopathy treatment other screening and monitoring tests should be used.

Conditions

• Liver Cirrhosis
• Hepatic Encephalopathy

Interventions

Type	Name	Description
DRUG	Lactulose and rifaximin	3 months treatment. lactulose 25 Ml x3 per day. Rifaximin (550 mg) x 2 per day.
DIETARY_SUPPLEMENT	Branched Chain amino acids	30 grams of branched chain amino acids (Bramino) per day is given to the patients in the antiHE treatment arm along with lactulose and rifaximin.
OTHER	Placebo	Patients in the placebo-arm receives both placebo-Bramino, placebo-lactulose and placebo-rifaximin.

Timeline

• Start date: 2013-01-01
• Primary completion: 2015-10-01
• Completion: 2015-11-01
• First posted: 2013-01-23
• Last updated: 2016-02-23

Locations

2 sites across 1 country: Denmark