Association between road accidents and low-grade hepatic encephalopathy among Sri Lankan drivers with cirrhosis: a prospective case control study

Prior overt hepatic encephalopathy and hyponatremia are more strongly linked to recent driving accidents than measures of minimal hepatic encephalopathy

BACKGROUND

Cognitive impairment in cirrhosis is driven by multiple influencers. Those with cognitive impairment have greater traffic accidents and violations. While the presence of minimal hepatic encephalopathy has been associated with poor driving skills, studies show conflicting results and variable associations with regard to accidents.

METHODS

In a prospective study of stable outpatients with cirrhosis without a recent history of overt hepatic encephalopathy (OHE) (<3 months), we assessed, the overall practice of driving, recent (<1 month) self-reported accidents, and factors associated with driving accidents.

RESULTS

Of 433 patients, 147 (33.9%) [age, 55 (46-61) years, 97.9% males, 29.9% alcohol-related, 13.6% prior OHE, MELD 11 (10-16), lactulose use 45.5%, rifaximin use 23.1%] reported recent driving (≤1 month), of whom 22 (14.9%) had recent driving accidents. Those with reported accidents had a higher history of prior OHE (31.8 vs. 10.5%, P  < 0.05) and lower sodium [131 (129-134) vs. 134 (132-138), P  < 0.05]. Psychometric hepatic encephalopathy score (PHES) [-5.5 (-4 to -9), vs. -4 (-3 to -7), P  = 0.10], alcohol as an etiology (22.7 vs. 31.2%, P  = 0.68), MELD [12.5 (10-17) vs. 11 (9.7-16), P  = 0.36], animal naming test [18 (16-23) vs. 18 (15-22), P  = 0.35], outpatient fasting ammonia [93 (63.7-121.5) vs. 81 (67.2-96.2), P  = 0.43] were similar. On univariate analysis, prior OHE, sodium levels and PHES [odds ratio (OR): 0.87 (0.75-1.0), P  = 0.09], and animal naming test [OR: 0.89 (0.76-1.04), P  = 0.10)] showed a trend of association, while on multivariable analysis only prior OHE [adjusted OR: 3.48 (1.07-10.74), P  = 0.03] and sodium levels [adjusted OR: 0.89 (0.79-0.99), P  = 0.03] were associated with recent driving accidents [model AUC (prior OHE + Na≤130), 0.70 (0.62-0.77)].

CONCLUSION

In stable outpatients with cirrhosis, a remote history of OHE and hyponatremia are most strongly associated with recent driving accidents.

External validation of EncephalApp Stroop test to screen minimal hepatic encephalopathy patients with nonalcoholic cirrhosis

BACKGROUND

Neurocognitive impairment, including minimal hepatic encephalopathy (MHE) and overt hepatic encephalopathy, is one of the most common complications of all types of primary liver diseases, such as hepatitis B, biliary cholangitis, and autoimmune hepatitis. The EncephalApp Stroop test is a smartphone application-based test that is time-saving for MHE screening. However, neurocognitive impairment is different between alcoholic cirrhosis patients and nonalcoholic cirrhosis patients, so the cutoff value for MHE diagnosis might be inflated.

AIM

To validate the Stroop test in nonalcoholic cirrhosis patients.

METHODS

This external validation was performed at the National Center for Infectious Diseases (Beijing). Liver cirrhosis patients aged between 18 and 65 years who voluntarily enrolled in the study and provided signed informed consent were included. The Psychometric Hepatic Encephalopathy Score (PHES) test was used as the standard diagnostic criterion for MHE. The EncephalApp Stroop test was then performed on the iPad, including two sessions of tests (“off” and “on”) to measure patients’ ability to differentiate between numbers and letters. We assessed the performance of the EncephalApp Stroop test in terms of the area under the curve (AUC), sensitivity, specificity, positive predictive value, and negative predictive value, with the PHES as the standard criterion.

RESULTS

A total of 160 nonalcoholic cirrhosis patients were included in this validation study, including 87 (54.4%) patients without MHE and 73 (45.6%) patients with MHE. Taking the PHES as the gold standard, the EncephalApp Stroop test performed well for nonalcoholic liver cirrhosis patients in terms of “off” time [AUC: 0.85, 95% confidence interval (CI): 0.79-0.91] and “on + off” time (AUC: 0.85, 95%CI: 0.80-0.91); however, total runs of “off” session (AUC: 0.61, 95%CI: 0.52-0.69), total runs of “on” session (AUC: 0.57, 95%CI: 0.48-0.65), and “on – off” time (AUC: 0.54, 95%CI: 0.44-0.63) were comparatively low. The optimal cutoff points were “off” time > 101.93 seconds and “on + off” time > 205.86 seconds, with sensitivities of 0.84 and 0.90, specificities of 0.77 and 0.71, positive predictive values of 0.75 and 0.72, and false-positive values of 0.85 and 0.89, respectively.

CONCLUSION

Our results suggest that different cutoffs should be used for the EncephalApp Stroop tool for MHE screening between alcoholic and nonalcoholic living patients, which is a critical check before generalization to screen for neurocognitive impairment among the whole population of chronic liver diseases.

British Society of Gastroenterology Best Practice Guidance: outpatient management of cirrhosis - part 2: decompensated cirrhosis

There are two distinct phases in the natural history of cirrhosis: compensated disease (corresponding to Child Pugh A and early Child Pugh B disease), where the patient may be largely asymptomatic, progressing with increasing portal hypertension and liver dysfunction to decompensated disease (corresponding to Child Pugh late B-C), characterised by the development of overt clinical signs, including jaundice, hepatic encephalopathy (HE), ascites, renal dysfunction and variceal bleeding. The transition from compensated cirrhosis to decompensated cirrhosis (DC) heralds a watershed in the nature and prognosis of the disease. DC is a systemic disease, characterised by multiorgan/system dysfunction, including haemodynamic and immune dysfunction. In this second part of our three-part series on the outpatient management of cirrhosis, we address outpatient management of DC, including management of varices, ascites, HE, nutrition, liver transplantation and palliative care. We also introduce an outpatient DC care bundle. For recommendations on screening for osteoporosis, hepatocellular carcinoma surveillance and vaccination see part one of the guidance. Part 3 of the guidance focusses on special circumstances encountered in patients with cirrhosis, including surgery, pregnancy, travel, management of bleeding risk for invasive procedures and portal vein thrombosis.

EASL Clinical Practice Guidelines on the management of hepatic encephalopathy

The EASL Clinical Practice Guidelines (CPGs) on the management of hepatic encephalopathy (HE) present evidence-based answers to a set of relevant questions (where possible, formulated in PICO [patient/population, intervention, comparison and outcomes] format) on the definition, diagnosis, differential diagnosis and treatment of HE. The document does not cover the pathophysiology of HE and does not cover all available treatment options. The methods through which it was developed and any information relevant to its interpretation are also provided.

Hepatic encephalopathy

Hepatic encephalopathy (HE) is a prognostically relevant neuropsychiatric syndrome that occurs in the course of acute or chronic liver disease. Besides ascites and variceal bleeding, it is the most serious complication of decompensated liver cirrhosis. Ammonia and inflammation are major triggers for the appearance of HE, which in patients with liver cirrhosis involves pathophysiologically low-grade cerebral oedema with oxidative/nitrosative stress, inflammation and disturbances of oscillatory networks in the brain. Severity classification and diagnostic approaches regarding mild forms of HE are still a matter of debate. Current medical treatment predominantly involves lactulose and rifaximin following rigorous treatment of so-called known HE precipitating factors. New treatments based on an improved pathophysiological understanding are emerging.

Important Unresolved Questions in the Management of Hepatic Encephalopathy: An ISHEN Consensus

Management of hepatic encephalopathy (HE) remains challenging from a medical and psychosocial perspective. Members of the International Society for Hepatic Encephalopathy and Nitrogen Metabolism recognized 5 key unresolved questions in HE management focused on (i) driving, (ii) ammonia levels in clinical practice, (iii) testing strategies for covert or minimal HE, (iv) therapeutic options, and (v) nutrition and patient-reported outcomes. The consensus document addresses these topical issues with a succinct review of the literature and statements that critically evaluate the current science and practice, laying the groundwork for future investigations.