[Pulse oximetry during fiberoptic bronchoscopy under local anesthesia]

Area of Science:

• Pulmonology
• Anesthesiology
• Critical Care Medicine

Background:

• Fiberoptic bronchoscopy is a common procedure, but hypoxemia can occur.
• Local anesthesia is often used, requiring careful monitoring of oxygenation.
• Patients with underlying lung disease are at higher risk of oxygen desaturation.

Purpose of the Study:

• To evaluate the effect of supplementary oxygen on arterial oxygen saturation (SaO2) during fiberoptic bronchoscopy.
• To assess the incidence of hypoxemic episodes with and without supplemental oxygen.
• To determine the utility of pulse oximetry in this setting.

Main Methods:

• 81 patients undergoing fiberoptic bronchoscopy under local anesthesia were studied.
• Patients received either 2 L/min of supplementary oxygen (Group 1, n=41) or no oxygen (Group 2, n=40).
• Arterial oxygen saturation (SaO2) was continuously monitored using pulse oximetry.

Main Results:

• Mean SaO2 was significantly higher in Group 1 (96%) than Group 2 (92%) (p<0.001).
• Hypoxemic episodes (SaO2 ≤90%) occurred in 34% of Group 1 vs. 80% of Group 2 (p<0.01).
• Patients with impaired lung function experienced the greatest decrease in SaO2 and highest frequency of hypoxemia.

Conclusions:

• Routine use of supplementary oxygen (2-3 L/min) and pulse oximetry is recommended during fiberoptic bronchoscopy.
• These measures can effectively prevent hypoxemia and improve patient safety.
• Particular attention should be paid to patients with compromised respiratory function.