Model for evaluating the effect of growth factors on the larynx

Growth factors are proteins that help regulate the inflammatory response an d wound healing in tissues. After laryngotracheal surgery, proper wound hea ling is important in maintaining the reconstructed airway. The application of growth factor to the respiratory mucosa of the larynx and ifs effect on wound healing within the airway have not been studied. This study was desig ned to establish a model for the evaluation of wound healing after the appl ication of growth factor to composite respiratory mucosa and cartilage surf aces at the time of laryngotracheoplasty. Forty rabbits underwent anterior cricoid cartilage split with or without the use of a cartilage graft. Plate let-derived growth factor or a placebo substance was applied to the wound a t the time of surgery. This study offers a model for studying wound healing in the airway that is reproducible with limited morbidity.