[The change of circulating endothelial cell in blood of rats and pulmonary small artery vascular endothelial cell under acute hypoxia].

Aim: To investigate changes of VEC and CEC under acute hypoxia.

Methods: Observe CEC in blood under acute hypoxia morphologically and count the number of CEC by optical microscope, measure LDH activity of young CEC and VEC by histochemical staining image analysis.

Results: LDH activities of VEC in hypoxic groups are lower than that in the group before hypoxia and decrease progressively with hypoxia time.