Prospektiv randomisierte bizentrische Studie zum Vergleich der 22G und 19G EBUS-TBNA Nadeln
Die exemplarische Analyse der Korrelation zwischen der Nadelgröße und der
Möglichkeit der Durchführung vermehrter molekularpathologischer Untersuchungen konnte jedoch noch keine klare Tendenz aufzeigen. Weitere Studien werden notwendig sein, um die Relevanz dieser Erkenntnisse hinsichtlich der Notwendigkeit genauerer molekularer und immunologischer Untersuchungen zu überprüfen.
The demand for tissue has increased in lung cancer through personalized medicine. Recently, larger endobronchial ultrasound needles have become available for transbronchial lymph node biopsy. We compared the new 19-gauge (G) needle with 22-G needles regarding tissue quality, feasibility, safety, and performance in a prospective manner. Significantly more tissue and tumor cells per slide were obtained with a 19-G needle.
Background: The use of 22- or 21-gauge (G) endobronchial ultrasound (EBUS) needles are recommended for lung cancer diagnosis and staging. Performance of detailed molecular workup and programmed death ligand 1 (PD-L1) staining in lung cancer patients increases the demand for tissue. The aim of this prospective, randomized two-center trial was to compare 19-G and 22-G EBUS needles regarding tissue quality, diagnostic yield, feasibility, safety, performance, and blood content.
Patients and Methods: Patients with a computed tomography scan indicative of lung cancer with mediastinal or hilar lymph node metastases were prospectively enrolled and randomized for the use of either a 19-G or a 22-G EBUS needle. A blood content score from 0 to 2 was applied. Samples were weighed, tumor cells were counted per slide, and complications and final diagnoses were documented.
Results: We enrolled 107 patients (53 [49.5%] in the 19-G group/54 [50.5%] in the 22-G group) and samples were weighed immediately after performing EBUS. Samples obtained with a 19-G needle contained significantly more tissue (P . .0119). Nonesmallcell lung cancer-infiltrated EBUS samples contained significantly more tumor cells when sampled with a 19-G needle (P . .0312). The diagnostic yield was equally adequate in both groups. Four moderate EBUS-related bleedings occurred (2 per group), hemostasis was rapidly achieved in all cases. Further complications did not occur.
Conclusion: Endobronchial ultrasound-guided transbronchial needle aspirations with a 19-G needle contain significantly