[Indications and role of albumin, plasma volume expansion excluded, in the preoperative or postoperative management of portal hypertension]

[Comparative study of hospital costs associated with human albumin 20% (Vialebex 20%) or polygeline as a fluid resuscitation strategy for cirrhotic ascites]

OBJECTIVES

To compare the hospital costs associated with two fluid resuscitation strategies for cirrhotic ascites: one with human albumin 20% (Vialebex 20%) and one with polygeline.

METHODS

Multicenter prospective randomized double-blinded comparative trial (that also compared efficacy and tolerance). The economic evaluation was based on direct medical costs throughout the follow-up period: days of hospitalization, hospital consultations, medical procedures, and fluid resuscitation products. This cost-minimization study had a 6-month follow-up period. Daily costs in euros were adjusted over a 30-day period. The study was interrupted prematurely because of an alert due to the bovine origin of the polygeline, and the inclusion objectives could therefore not be met.

RESULTS

The economic analysis included all patients in the efficacy population (group receiving human albumin 20%: n=30, polygeline group: n=38). It found a standardized cost per patient for 30 days of treatment that was significantly lower (p=0.004) for human albumin 20% (median: 1915 euro; range: 1330-4105) than for polygeline (median: 4612 euro; range: 2138-12234). This difference is related mainly to a reduction in the frequency and duration of hospitalization in specialized units, but also to other aspects of management: hospitalization in other departments, specific solutions for the study products, and hospital procedures.

CONCLUSION

The economic results of this trial favor a fluid resuscitation strategy that uses human albumin 20% for cirrhotic patients. They are consistent with the clinical results and help assess the cost-benefit ratio of human albumin 20% for this indication.

Increased expression of endothelin receptors in the vasculature of portal hypertensive rats: role in splanchnic hemodynamics

Portal hypertension (PHT) is characterized by increased portal pressure caused in part by a reduction in mesenteric vascular resistance. The aim of this study was to evaluate the role of endothelin (ET) and specific ET receptors in maintaining the vasculopathy of PHT. PHT was created in Sprague-Dawley rats by a partial portal vein ligation. Control animals were sham-operated. ET receptor expression was determined in the superior mesenteric artery of sham and PHT rats by in situ autoradiography, radioligand binding analysis, and reverse-transcription polymerase chain reactions (RT-PCR). The pressor response to ET-1 was determined in vitro using isolated vascular rings and in vivo by measuring mean arterial pressure, splanchnic blood flow, and portal venous pressure following treatment with ET and selective ET receptor antagonists. The pressor response to ET in vitro was significantly enhanced in PHT concomitant with increased ET-A and ET-B receptor expression. There was a significant increase in the peak pressor response to ET (10 microg/kg intravenously) in portal hypertensive rats without any significant change in plasma ET-1 levels. There was no significant difference in the peak splanchnic blood flow or portal venous pressure response following ET-A receptor blockade with JKC-301 infusion (200 microg/kg intravenously). In contrast, ET-B receptor blockade with IRL-1038 (200 microg/kg intravenously) preferentially decreased splanchnic blood flow and portal venous pressure in portal hypertensive rats. These data suggest that enhanced ET-B receptor expression in portal hypertensive vessels contributes to the maintenance of elevated portal pressure in these animals.