Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Patients undergoing rigid bronchoscopy for treatment of central airway obstruction at FV UMMC will be identified.
18 years or older
Need rigid bronchoscopy as pre-determined by the interventional pulmonologist

Refusal to sign consent
Pregnant patients
Hemodynamic instability defined as continuous infusion of medication in order to support blood pressure and/or heart rate/rhythm
Respiratory instability defined as SpO2\<90% with \>90% supplemental oxygen.
Ineligible for rigid bronchoscopic intubation
Latex allergy
Evidence of fistulous airway
Active Bronchopleural fistula

To Investigate Airway Oxygen Concentrations During Rigid Bronchoscopy Procedures Performed With High Frequency Jet Ventilation