2nd chamber lumen is attached to a suction device & airway secretions can be removed
3rd chamber has tiny metallic alligator forceps that can be extended past the proximal end for tissue biopsies
4th chamber lumen allows passage of a small wire brush that can be passed vigorously over airway structures for collection of tissue cells for microscopic evaluation
Equipment
Flexible or Rigid
Adult sizes
5.0 mm OD to 6.0 mm OD
Pediatric sizes
Most manufacturers provide scopes in sizes 3.5 mm OD or less appropriate for children. No channel outlet may exist for suctioning because of its small size