Objective:To investigate the diagnosis and treatment of pulmonary embolism in hospitals of different medical levels in recent 10 years in order to provide evidences to improve the level of the pulmonary embolism prevention

diagnosis and treatment.Methods:The clinical data of 336 pulmonary embolism patients from 31 hospitals of different medical levels of Chongqing from January 2003 to December 2012 by convenience sampling method were investigated. The questionnaire included :the general situation

the underlying diseases and risk factors

clinical manifestations

examination findings

treatment and prognosis. Results:（1）A total of 336 patients（195 cases were confirmed

141 cases were diagnosed in clinical）of which 105 cases died.（2）The most common complicated diereses were hypertension

trauma and surgery

lung cancer

cardiac insufficiency

malignant tumor

diabetes

braking

lung infection.（3）The common symptoms were dyspnea

symptoms of deepvein

chest pain

palpitation

cough

sputum

and syncope.（4）The definite diagnose rate of un-elderly patients showed higher than that of elderly patients

the difference was significant（67.14% vs. 51.03%

P=0.003）. The mortality of elderly patients was higher than that of non-elderly patients

and the difference was significant（36.60% vs. 24.29%

P=0.017）.（5）The definite diagnose rate of patients who were diagnosed from 2008 to2012 was higher than patients who were diagnosed from 2003 to 2007

and the difference was significant（62.23% vs. 38.6%

P=0.000）.The mortality of patients who were diagnosed from 2003 to 2007 was higher than that of patients who were diagnosed from 2008 to2012

and the difference was significant（49.12% vs. 27.34%

P=0.000）.（6）The definite diagnose rate of tertiary hospitals was higher than that of second-class hospitals

and the difference was significant（59.81% vs. 31.58%

P=0.015）;The difference of the mortality of between tertiary hospitals and second-class hospitals was not significant（31.01% vs. 36.84%

P=0.595）.（7）The mortality of intervention group was higher than non-intervention group

the difference was significant（14.53% vs. 69.61%

P=0.000）.（8）The multivariate regression analysis confirmed that the factors associated with the definite diagnose rate including the age（odds ratio:2.177

95%CI=1.356 to 3.494）

time（odds ratio:3.175

95%CI=1.720 to 5.860）

and the class of hospital（odds ratio:0.262

95%CI=0.094 to 0.728）;the risk factors associated with the mortality including the time（odds ratio:1.817

95%CI=0.895 to 3.687）and untreated（odds ratio:0.078

95%CI=0.044 to 0.137）. Conclusion:The consciousness of pulmonary embolism diagnosis is gradually improved for the most hospital medical staff from 2003 to 2012 in Chongqing

but the consciousness of prevention and screening high-risk patients with pulmonary embolism is poor. Tertiary hospitals mainly depend on computed tomography pulmonary angiography（CTPA）in the diagnosis of pulmonary embolism. Pulmonary embolism diagnosis mainly conduct in clinic in different medical levels hospitals

and the definite diagnose rate is low. While the definite diagnose rate of un-elderly patients is higher than that of elderly patients

and the the definite diagnose rate of tertiary hospitals is higher than that of second-class hospitals. The diagnosis and treatment of Pulmonary embolism is non-standard

and the mortality of pulmonary embolism is high. Treatment could decrease the mortality of the patient with pulmonary embolism. The ability of diagnosis and treatment of pulmonary embolism should be further improved.