Using saccades to diagnose covert hepatic encephalopathy

Area of Science:

• Neuroscience
• Hepatology
• Ophthalmology

Background:

• Covert Hepatic Encephalopathy (CHE), a cognitive deficit in 30-70% of cirrhosis patients, impacts quality of life and survival.
• Current diagnostic methods rely on psychometric tests unsuitable for clinical settings.
• Early diagnosis of CHE is crucial for management and preventing adverse events like impaired driving.

Purpose of the Study:

• To investigate saccadic latency distributions as a viable alternative diagnostic tool for CHE.
• To compare saccadic performance between cirrhosis patients with and without CHE and healthy controls.
• To assess the diagnostic accuracy of saccadic latency analysis for CHE.

Main Methods:

• Collected saccadic latency data from 35 cirrhosis patients and 36 age-matched healthy controls.
• Utilized standard psychometric tests to identify CHE according to World Congress of Gastroenterology criteria.
• Compared visually-evoked saccades and correlated saccadic latencies with biochemical markers and prognostic scores.

Main Results:

• Cirrhosis patients exhibited significantly longer median saccadic latencies than healthy controls.
• Patients with CHE showed significantly prolonged saccadic latencies compared to those without CHE.
• Saccadic latency analysis demonstrated 75% sensitivity and 75% specificity in diagnosing CHE.

Conclusions:

• Saccadic latency distribution analysis is a rapid, objective diagnostic tool for CHE in cirrhosis patients.
• This method facilitates earlier diagnosis, enabling timely interventions and risk mitigation (e.g., driving).
• Improved early detection can enhance treatment strategies and patient management for CHE.