Effects on respiratory patterns during bronchoscopy by the Sanders attachment technique

Area of Science:

• Pulmonology
• Anesthesiology
• Medical Devices

Background:

• Bronchoscopy is a common procedure for diagnosing and treating lung conditions.
• Selecting appropriate equipment, such as bronchoscope and injector sizes, is critical for patient safety and procedural success.
• The Sanders attachment technique is frequently used during bronchoscopy under general anesthesia.

Purpose of the Study:

• To determine the optimal ratio of injector to bronchoscope internal diameters (RI/B) for use with the Sanders attachment during bronchoscopy.
• To provide a rational basis for selecting injector and bronchoscope sizes in this clinical setting.

Main Methods:

• Seven dogs underwent bronchoscopy under general anesthesia with the Sanders attachment.
• Measurements of arterial oxygen (PaO2) and carbon dioxide (PaCO2) partial pressures, fraction of inspired oxygen (FiO2), and peak inspiratory pressure were recorded.
• These parameters were analyzed in relation to the RI/B.

Main Results:

• Increasing the RI/B ratio led to higher peak inspiratory pressures.
• An elevated RI/B ratio resulted in increased PaO2 and FiO2.
• A higher RI/B ratio correlated with a decrease in PaCO2.

Conclusions:

• The ratio of injector to bronchoscope internal diameters significantly impacts respiratory parameters during bronchoscopy.
• A higher RI/B is associated with improved oxygenation and ventilation.
• A working table is proposed to aid in predicting the optimal RI/B for clinical use.