Abstract
Degradable starch microspheres injected into an artery causes a temporary reduction of regional blood flow and improves the exposure of the organ to a drug injected simultaneously. The purpose of this study was to quantify this effect when microspheres are injected arterially into the liver of rats. As model substance radioactive pertechnetate ions (99TcmO4-) was used. The results were evaluated from external gamma camera measurements. The amounts of microspheres injected together with pertechnetate was 1.5-12 mg. When compared to injections of pertechnetate only, the integrated exposure of the liver to pertechnetate was increased by a factor of 1.4-2.4 when microspheres were added.
Published Version
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