声门下狭窄主要由于长期气管内插管造成瘢痕形成及纤维化所致，常用治疗手段包括内窥镜下扩张、电烙、激光汽化及各种开放手术，但所有这些治疗方式均造成不同程度的新的创伤而影响疗效。在创伤愈合过程中，纤维母细胞集落产生，导致胶原形成，瘢痕收缩，使管腔变小。在众多类 Subglottic stenosis is mainly caused by long-term endotracheal intubation caused by scar formation and fibrosis, commonly used treatments include endoscopic distension, electrocautery, laser vaporization and various open surgery, but all of these treatments have caused varying degrees of New trauma and affect the efficacy. During wound healing, colony formation of fibroblasts results in collagen formation, scarring, and shrinking of the lumen. In many categories