C. Hyun Sunga (Dr), E. Jung Seop*b (Prof)

a National Cancer Center, Goyang, KOREA, REPUBLIC OF ; b Pusan National University School of Medicine, Busan, KOREA, REPUBLIC OF

* ejspulm@gmail.com

Background: Bronchoscopy using radial probe endobronchial ultrasound (RP-EBUS) is used for the diagnosis of the peripheral tumors and convex endobronchial ultrasound (CP-EBUS) is used for the mediastinal staging. However, little is known about the combined procedure with RP- and CP-EBUS.

Methods: Among the patients who underwent EBUS between January 2020 and March 2021, patients underwent RP-EBUS alone were classified as the RP-EBUS group, while patients underwent a combined procedure with RP- and CP-EBUS were classified as the combination group.

Results: The overall diagnostic yield in the combination group was higher than the RP-EBUS group (90.7% vs. 70.0%, P < 0.001). CP-EBUS increased the diagnostic yield of RP-EBUS in the combination group by 9.3%. The mean procedure time was longer, and the mean doses of midazolam and fentanyl were higher in the combination group, there were no differences in the complication rates between the study groups (1.4% and 1.0% for the RP-EBUS and combination groups, respectively, P = 0.766).

Conclusion: RP- and CP-EBUS combination is feasible and safe. Besides mediastinal staging, CP-EBUS increased the overall diagnostic yield of bronchoscopic procedures.

Disclosure of funding source(s): none