[Bronchoplegic phenomena caused by vagal denervation. Experimental study].

Area of Science:

• Thoracic Surgery
• Pulmonary Medicine
• Surgical Research

Background:

• Bronchial plastic surgery, including sleeve resection, offers treatment for lung cancer in patients unsuitable for standard surgery.
• Post-operative complications like dysventilation and bronchial engorgement are often linked to vagal denervation during these procedures.

Purpose of the Study:

• To investigate the impact of vagal denervation on respiratory function following experimental bronchial sleeve resection.
• To determine if preserving vagal fibers mitigates post-operative airway complications.

Main Methods:

• A surgical model using 10 pigs was employed, divided into two groups: one with sleeve resection and vagal preservation (control), and another with sleeve resection and vagal denervation.
• Animals were monitored using X-ray, bronchoscopy, and cough reflex stimulation.
• Post-operative respiratory function, including airway engorgement and muco-ciliary clearance, was assessed.

Main Results:

• Animals undergoing vagal denervation exhibited significant respiratory tract engorgement and delayed cough reflex onset.
• The control group, with preserved vagal fibers, showed no signs of bronchoplegia or altered muco-ciliary clearance.
• These findings support the hypothesis that vagal denervation contributes to post-operative airway issues.

Conclusions:

• Vagal denervation during bronchial sleeve resection is a likely cause of post-operative dysventilation and bronchial engorgement.
• Preserving vagal nerve function during sleeve resection surgery is crucial for maintaining normal airway physiology and muco-ciliary clearance.
• This research highlights the importance of surgical technique in minimizing functional deficits after lung cancer surgery.