[Ultrastructure of hepatocytes after local cooling of the liver].

Electron-microscopic and stereometric study of hepatocyte ultrastructure with local liver cooling to -30 degrees C have been performed using the method of vital fixation by rat liver perfusion. Quantitative and qualitative data obtained testify to the presence of destructive changes in hepatocytes immediately after thawing expressed in hyaloplasm lightening, formation of cavities in cytoplasm and injury of mitochondria membrane and endoplasmic reticulum integrity. Changes in nuclear structure of hepatocytes and Kupffer cells (widening of nuclear pores and channels in condensed chromatine, as well as the presence of ribosomal complexes in the nucleus and edge position of the nucleolus) may be connected with the beginning of the reparation process.