Correlation study between CT pulmonary artery obstruction index and right ventricular function and arterial blood gas analysis index / 实用放射学杂志

ABSTRACT

Objective To investigate the value of CT pulmonary artery obstruction index (PAOI)in evaluating the severity in patients of pulmonary embolism (PE)by a correlation study between CT PAOI and right ventricular function parameters and arterial blood gas analysis index.Methods CT PAOI,right ventricular function parameters and arterial blood gas analysis index were collected from 70 patients with PE,who had received CT pulmonary angiography (CTPA)examination in our hospital.Spearman rank correlation coefficient was used to evaluate the correlation between the PAOI and right ventricular/left ventricular maximum short axis diameter ratio (RVd/LVd),main pulmonary artery diameter (MPAd),superior vena cava diameter (SVCd),arterial oxygen partial pressure (PaO2 ),arterial carbon dioxide into pressure (PaCO2 ),oxygen saturation (SaO2 ),Alveolar arterial oxygen partial pressure difference (P(A-a)O2 ).Results PAOI and PaO2 were negative correlation,the correlation coefficient was -0.442;PAOI and RVd/LVd, MPAd,SVCd,P(A-a)O2 were positively related,correlation coefficients ranged between 0.163-0.675;PAOI was not related to SaO2 .Conclusion CT PAOI can be used to evaluate the severity of PE,it is not consistent with the severity of the patient’s clinical condition.