Study objectives: To determine the optimal method of
delivering supplemental oxygen during flexible bronchoscopy (FB).
Design: Prospective study.
University medical center.
Ninety-seven consecutive patients undergoing outpatient nasal FB during
a 7-month period.
Intervention: During FB, delivery of
oxygen was alternated weekly and administered by nasal cannula either
nasally (52 patients) or orally (45 patients). Prior to the procedure,
patients completed a questionnaire regarding oral or nasal breathing
preferences, history of sinus disease, allergy history, and perceived
degree of nasal congestion.
Results: Comparison of
oxygen delivery groups demonstrated no significant difference in oxygen
requirements (4.1 L/min nasal vs 3.8 L/min oral, p = 0.63), overall
saturation nadir (90.9% nasal vs 91.4% oral, p = 0.85), or average
saturation (95.8% nasal vs 95.7% oral, p = 0.57). No correlation
between subjective symptoms or sinus or allergy history was found for
oxygen requirements, average saturation, or saturation nadir.
Conclusions: These data suggest that during nasal FB, no
discernible difference exists between administration of oxygen using
cannulas placed either nasally or orally.