Endobronchial ultrasound-guided transbronchial needle aspiration: determinants of sampling adequacy.

Background:Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is increasingly used to sample mediastinal and hilar lymph nodes and has excellent diagnostic test characteristics. The determinants of sampling adequacy, however, have not been extensively examined. We set out t