Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · Jul 1994
Randomized Controlled Trial Clinical Trial Retracted PublicationInfluence of volume replacement with different HES-solutions on microcirculatory blood flow in cardiac surgery.
A variety of hydroxyethyl starch HES preparations with different molecular weight average (Mw) and molar substitution (MS) is available for volume replacement during acute normovolemic haemodilution (ANH). Particularly with regard to microcirculation, the ideal solution for volume therapy has not been found. The influence of four different HES preparations on macro- and microcirculation was investigated in 40 patients scheduled for elective aorto-coronary bypass grafting and undergoing ANH (preoperative withdrawn blood: 10 ml.kg-1): 1) 6% HES with Mw of 450,000 dalton and MS of 0.7; 2) 6% HES with Mw of 200,000 dalton and MS of 0.5; 3) 6% HES with Mw of 200,000 dalton and MS of 0.62; 4) 6% HES with Mw of 40,000 dalton and MS of 0.5. ⋯ After ANH, skin capillary blood flow measured at the forehead decreased in all patients except in patients of group 2 (200/0.5: max. +18%). Group 3 (200/0.62) showed the highest decrease in forehead-LDF. During CPB, forehead-LDF decreased significantly in groups 3 (200/0.62) and 4 (40/0.5).(ABSTRACT TRUNCATED AT 250 WORDS)