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- W1984318395 abstract "Various biologic and non-biologic materials may be embolized to the brain after the use of cardiopulmonary bypass (CPB) pumps during open heart surgery but their relative frequency and importance are uncertain. Among the nonbiologic materials, Antifoam A, which contains organosilicates and silicon, continues to be employed as an additive to prevent frothing. Recent improvements in filtration and oxygenation techniques have clearly reduced the incidence of large emboli and complications like stroke but other neurologic sequelae following open heart surgery are common and in many cases poorly explained. A recently developed histochemical technique for the demonstration of the endothelial alkaline phosphatase (AP) was employed in a post-mortem study of brains from 8 patients and 6 dogs dying within a few days after open heart surgery employing cardiopulmonary bypass perfusion. Brains from 38 patients and 6 dogs who were not subjected to heart surgery were studied as controls with the same technique. The AP-stained slides are suitable for both light microscopic examination of the thick celloidin sections as well as subsequent processing for high-resolution microradiography. mall apillary and rteriolar ilatation (SCADs) were seen in the test subjects/animals but not controls. SCADs were seen in all parts of the brain. Approximately 50% of the SCADs showed birefringence when examined with polarized light. SCADs are putative embolic phenomena and the exact nature and source of the embolic material is under investigation. A glycolipid component is indicated by preliminary studies. SCADs are difficult to find in routine paraffin sections and most if not all of the offending material seems to be dissolved during processing. The biologic and clinical significance of SCADs need to be clarified. Continued research and refinement of the CPB will be needed to decrease or eliminate the embolic neurologic complications of open heart surgery and making it much more safe." @default.
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- W1984318395 date "1993-07-01" @default.
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- W1984318395 title "Brain embolic phenomena associated with cardiopulmonary bypass" @default.
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- W1984318395 doi "https://doi.org/10.1016/0022-510x(93)90177-z" @default.
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