[The diagnostic utility of thin-slice CT navigation combined with radial endobronchial ultrasound for peripheral pulmonary lesions].

Objective: To evaluate the diagnostic value of thin-slice CT navigation combined with radial endobronchial ultrasound in peripheral lung lesions. Methods: The clinical data of patients with peripheral lung lesions diagnosed by thin-slice CT navigation combined with radial endobronchial ultrasound in National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College from November 2015 to August 2018 were retrospectively analyzed. The success rate of thin-slice CT for guiding radial endobronchial ultrasound was statistically analyzed, and the diagnostic rate, sensitivity and specificity of thin-slice CT combined with radial endobronchial ultrasound were analyzed. Results: 140 consecutive patients with 145 lesions were included, 139 lesions in 136 patients were found by thin-layer CT guidance, the success rate was 95.9%; 137 lesions in 135 patients were examined by histology and/or cytology, and 106 lesions were finally diagnosed, the diagnostic rate was 77.37%; and the diagnosis sensitivity and specificity was 88.45% and 99.96%. Histological and cytological diagnostic rate, sensitivity and specificity was 72.18% versus 63.50%, 70.58% versus 66.85%, 100% versus 88.23%, respectively. Factors influencing the diagnostic rate of thin-slice CT navigation combined with radial endobronchial ultrasound include the relationship between the lesion and the target bronchus, the location of the probe and the lesion, and the size of the lesion, and the difference between the farthest generation of bronchoscopy insertion and the bronchial generation of lesions. Five patients had mild bleeding and one ultrasonic probe was damaged. Conclusion: Thin-slice CT has a higher positive rate in guiding peripheral lung lesions with radial ultrasound, and this method has a higher diagnostic value for peripheral lung lesions.