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Retinal vascular occlusions in open heart surgery.
  1. I M Williams


    This study describes microthrombotic emboli (with their ultrastructure) and emboli of fat and of dimethylpolysiloxane with silica in the retinal microcirculation of two patients who died-each after his second open heart operation. The presence of silica was confirmed by electron probe x-ray micro-analysis.

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