The activity of phospholipase A2 (PLA2) and content of Evans blue in tissue and infusing fiuid of rats lung were measured by microtitration. In experiment the tested rats were located under condition simulated 4 000m altitude to 48 hrs.

• 采用满足法测定了在模拟高原4000m停留48h大鼠肺组织及肺灌洗液的磷脂酶A2活性和伊文思蓝含量的变化。