Capillary Versus Suction Needle Aspiration for Endobronchial Ultrasound (EBUS) Biopsies.
Capillary Versus Suction Needle Aspiration for Endobronchial Ultrasound (EBUS) Biopsies.
Endobronchial ultrasound (EBUS)-guided transbronchial needle aspiration is a procedure used
 to obtain tissue samples (biopsies) of lymph nodes near the airways or of lung tumours
 growing in close proximity to the airways. Briefly, an endoscope with an ultrasound probe
 which is inserted through the mouth and into the airways. Once in the airways, the ultrasound
 allows for identification of the optimal biopsy site; a hollow biopsy needle is then inserted
 into the tissue under real-time ultrasound visualization and a sample is extracted.

 In the investigator's centre, the extracted sample is then immediately subjected to rapid
 on-site evaluation (ROSE). During the ROSE procedure, a cytotechnologist uses part of the
 sample to make a limited number direct smears which are then rapidly stained and evaluated
 under a microscope by the cytotechnologist. The cytotechnologist provides an assessment of
 the adequacy of the sample for diagnosis. The respirologist performing the EBUS then uses
 this information to: i) determine whether additional sampling is required, and ii) triage any
 additional samples for ancillary studies as needed. A final cytopathological diagnosis is
 established several days later, when all of the material from the procedure (including the
 material not evaluated at ROSE) is examined by a cytopathologist.

 There are different techniques which are utilized to perform the needle aspiration biopsy.
 Suction aspiration (where pressure suction is applied to the needle to draw out material)
 which is the standard at many centres around the world and capilliary suction (where a tiny
 wire is drawn back slowly to create more gentle suction force) which is utilized often at
 LHSC.

 The purpose of this study is to evaluate for differences in ROSE adequacy between these two
 methods.
Inclusion Criteria:

 -  Patient age greater to or equal than 18 years old

 -  Receiving an endobronchial ultrasound for any diagnostic reason

 Exclusion Criteria:

 -  Patients under 18 years old

 -  Patient refuses consent to undergo endobronchial ultrasound or is incapable of
 decision making.