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

Who can join

Ages 18 and older · All sexes

Inclusion Criteria:

* 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

Exclusion Criteria:

* 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

About the study

Thermal ablation (use of treatment modalities that generate heat) has become a widely used tool for treatment of central airway obstruction (e.g. laser, electrocautery, radiofrequency, and argon plasma coagulation). However, this method carries with it an increased risk for airway fire - a surgical fire that occurs in a patient's airway and could also include a fire in the attached breathing circuit. To decrease the risk of airway fire during mechanical ventilation with an endotracheal tube, the concentration of inspired oxygen (FiO2) is set below 40% while waiting for end tidal oxygen concentration (EtO2) to fall below 40% prior to starting thermal ablation. There is no published literature describing O2 concentration within the airways (AiO2) during jet ventilation with rigid bronchoscopy. The co-investigators of this study have recently collected data on AiO2 during rigid bronchoscopy using manual low frequency jet ventilation/high frequency jet ventilation with a period of apnea. The intent of this study is to measure the time taken for the central airway oxygen concentration to drop from 90 to 40% when the "laser mode" is activated on the Monsoon jet ventilator. Ventilation is continued during "laser mode."

What is being tested

• No intervention (other)

Sponsor: University of Minnesota · Participants: 50 · Started: Jan 12, 2024

Contact the study team

Official record on ClinicalTrials.gov — NCT05881863

Locations in the U.S.

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.