Synthetic polymer of glucose, with a molecular weight of 40,000 or 70,000 daltons. The smallest 40,000 dalton molecules have an “anti-sludge” effect, which promotes microcirculation. For this reason, it is often used in microsurgery to prevent microthrombotic events of anastomoses. Since it may trigger anaphylactic reactions, initially it must be administered slowly, under careful patient monitoring.