Objective: To establish a model of pulmonary embolism in rabbits by using autologous thrombosis of rabbit ear vein, to study the method of establishing acute pulmonary embolism by using autologous thrombus and to explore the diagnostic value of oxygen partial pressure in acute pulmonary embolism. Methods: Twenty rabbits were randomly divided into normal group (n=5), 7 h group, 24h group, 1 week after model establishment Group. The arterial blood gas analysis was performed on the carotid

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... of rabbits at 7 h, 24 h and 1 W after modeling. Results: Normal group oxygen partial pressure (93.15 ± 2.26) mmHg, 7 h group oxygen partial pressure (81.98 ± 1.94) mmHg, 24 h group oxygen partial pressure (84.55 ± 2.18) mmHg, 1 W group oxygen partial pressure (92.66 ± 1.92) mmHg. Normal group oxygen partial pressure and 7 h group, 24 h group oxygen partial pressure, P value was less than 0.05 and less than 0.01, indicating that the difference was statistically significant. Normal group oxygen partial pressure and 1 week group oxygen partial pressure, P value greater than 0.05, indicating that the difference was not statistically significant. Conclusion: The oxygen partial pressure was reduced at 7 h after the establishment of the acute pulmonary embolism model and failed to return to normal within 24 h. After 1 week, the embolus began to dissolve, the respiratory and circulatory system was reestablished, and the oxygen partial pressure gradually Return to normal level. Indicating that there is a positive correlation between oxygen partial pressure and acute pulmonary embolism.