Background: Endobronchial ultrasound (EBUS)-guided transbronchial needle aspiration (TBNA) is the preferred modality for sampling intrathoracic lymph nodes in patients with suspected sarcoidosis. Whether the number of revolutions of the needle inside the lymph node while performing TBNA affects the diagnostic yield is unknown.
Objectives: The aim of this paper was to compare the yield of different numbers of needle revolutions (10 vs. 20) during EBUS-TBNA in sarcoidosis.
Methods: Consecutive subjects with a clinicoradiological suspicion of sarcoidosis were randomized 1: 1 to undergo EBUS-TBNA with either 10 (group 1) or 20 revolutions (group 2). The primary and secondary outcomes were the diagnostic yield and adequacy of aspirates, respectively. Other outcomes were procedure duration, gross blood contamination of the aspirates, and safety of the procedure.
Results: Of the 171 subjects screened, 150 (mean age 43.5 years; 47.3% women) were randomized. A mean of 2.8 (group 1: 2.8, group 2: 2.7; p = 0.37) lymph nodes were sampled per subject with a mean of 2.1 passes per node in each group (p = 0.60). Among 133 subjects finally diagnosed with sarcoidosis, there was no difference (p = 0.65) in the diagnostic yield of EBUS-TBNA between group 1 (52/65, 80.0%) and group 2 (57/68, 83.8%). Adequate aspirates were obtained in 96.9 and 97.1% of the subjects in groups 1 and 2, respectively (p = 1.00). There was no difference in the procedure duration, the proportion of subjects with grossly bloody specimens, or complications between the 2 groups.
Conclusions: The diagnostic yield and specimen adequacy were not different when EBUS-TBNA was performed with 10 or 20 revolutions in subjects with sarcoidosis.
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