[Changes in vascular stria after blast traumatized guinea pigs by colloidal lanthanum tracing technique]

The exudation of endotheliocyte in the capillary vessels of vascular stria after blast traumatized guinea pigs was studied by colloidal lanthanum tracing technique. The high density lanthanum ion shown as a line--distribution can be found in the endothelial surfaces of vascular stria by using transmission electron microscopy, but nolanthanum granulars were seen in the cytoplasm of endotheliocyte, the base membrane, and the tissular interval of vascular stria. At six hours after exposure to impulse noise, the lanthanum ion can exudate to the base membrane of capillary vessels through the closed-linkup between two endotheliocytes. On twelve hours after exposure, the exudation of the vascular endothelial cell membrane was increased and the lanthanum ion of the high electronic density was precipitated to the inside of cytoplasm. This study suggested that the impulse noise may have a obvious early effect on the exudation of vascular stria and the colloidal lanthanum tracing technique is a better method in studying the cochlear microcirculation.