Factors affecting airway compliance and resistance in children receiving general anesthesia during adenotonsillectomy

Area of Science:

• Anesthesiology
• Pediatric Surgery
• Respiratory Physiology

Background:

• Airway compliance (Cdyn) and resistance (Raw) are critical metrics in pediatric surgery.
• Adenotonsillectomy is a common procedure in children, often requiring general anesthesia and endotracheal intubation.
• Understanding factors influencing intraoperative airway dynamics is essential for patient safety.

Purpose of the Study:

• To identify factors affecting dynamic airway compliance (Cdyn) and airway resistance (Raw) in pediatric patients undergoing adenotonsillectomy.
• To analyze the correlation between pre-operative patient characteristics and intraoperative airway mechanics.
• To provide data for optimizing anesthetic management in this patient population.

Main Methods:

• A prospective study involving 107 pediatric patients undergoing adenotonsillectomy.
• Measurement of Cdyn and Raw at 5, 10, and 15 minutes post-intubation.
• Univariate and multiple linear regression analyses to determine influencing factors.

Main Results:

• Dynamic airway compliance (Cdyn) showed a decreasing trend, while airway resistance (Raw) increased during anesthesia.
• Patient height demonstrated the strongest correlation with both Cdyn and Raw.
• Rales during pulmonary auscultation and the need for sputum suction were significantly associated with altered Cdyn and Raw.

Conclusions:

• Pre-operative factors including patient height, presence of rales, and requirement for sputum suction are significantly associated with intraoperative dynamic airway compliance and resistance.
• These findings underscore the importance of considering these factors prior to adenotonsillectomy to anticipate and manage airway mechanics.
• Optimizing pre-operative assessment can contribute to safer anesthetic management and improved surgical outcomes in pediatric adenotonsillectomy.