[Is the intestinal lavage with a solution of mannitol effective in the prevention of post-hemorrhagic hepatic encephalopathy in patients with liver cirrhosis? Results of a randomized prospective study].

OBJECTIVES

The aim of this study was to evaluate the usefulness of whole gut irrigation with a mannitol solution in the prevention of hepatic encephalopathy in patients with cirrhosis and bleeding oesophageal or gastric varices.

METHODS

The randomized prospective study included 40 patients with a mean age of 59.6 +/- 9.6 years. Bleeding was controlled by a Blakemore or Linton haemostatic tube, in all cases. The patients were divided into a "mannitol" group (n = 20) treated by whole gut irrigation with a 5 L solution containing 40 g/L of mannitol, and a "control" group (n = 20). The two groups did not differ for age, sex, aetiology of cirrhosis or gastrointestinal bleeding, Child-Pugh classification, delay of minimum fare or the number of transfused blood units. The onset of hepatic encephalopathy was investigated within the first 48 hours after the beginning of gastrointestinal bleeding. The grade of hepatic encephalopathy was established using an index with 4 criteria (mental status, asterixis, number connection test, arterial ammonia concentrations), each with 5 grades of severity.

RESULTS

There were no adverse side-effects in the mannitol group. The incidence of hepatic encephalopathy (5 vs 30%) and the length of hospitalization (8.2 +/- 2.3 vs 13.6 +/- 3.1 days) were significantly decreased in the mannitol group (P < 0.05). Mortality was not different between the 2 groups (P = 0.4).

CONCLUSION

Whole gut mannitol irrigation appears to be an effective, simple, inexpensive, well tolerated technique in the prevention of hepatic encephalopathy after variceal bleeding in patients with cirrhosis.