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近年,应用CO_2激光在内窥镜窥视下,切除喉部瘢痕性狭窄的治疗方法,已得到普遍的重视,但临床效果报告很不一致。为此,作者用23只杂种大狗作了实验。全部狗均用苯巴比妥钠静脉注射全麻(30mg/kg),用悬吊喉镜暴露喉腔,以小杯状钳环形剥除环状软骨区的粘膜,并以高速电钻和电烙器使环状软骨受伤。此后,每周常规检查一次,如有肉芽增生则咬除之和/或行温和地扩张(如有必要)。呼吸困难严重时,应行气管切开。全部狗均在损伤后7～21天形成瘢痕,引起声门下狭窄。其中1只狗伴有后联合处窦道形成,另1只狗出现声门蹼。23只狗中19只可以利用。将19只狗分为3组:1组10只(包括有声门蹼形成的1只),仅用激光消除瘢痕(包括瘢痕上面的残存粘膜);2组5只,用Dedo等介绍的活门粘膜瓣法,激光消除粘膜瓣下的瘢痕;3组4只,为对照组。实验组15只狗共行16次激光手术。上述手术步骤均在双目
In recent years, the application of CO_2 laser in the endoscopic peephole, the treatment of cicatricial laryngeal stenosis has been widespread attention, but the clinical effect of the report is very inconsistent. For this reason, the author made experiments with 23 hybrid big dogs. All dogs were anesthetized with phenobarbital sodium intravenously (30mg / kg), the laryngoscope was exposed through the laryngoscope, the mucosa of the ring-shaped cartilage was circumferentially stripped with a small cup-shaped clamp, and a high-speed electric drill and electric iron Cyclic cartilage injury. Thereafter, the routine examination once a week, in the case of granulation hyperplasia and / or moderate expansion (if necessary). Severe breathing difficulties, tracheotomy should be. All dogs formed scars 7-21 days after injury, causing subglottic stenosis. One of the dogs with the formation of sinus joint at the junction, and the other a dog with gliding web. 19 of 23 dogs are available. Nineteen dogs were divided into three groups: one group of 10 (including one with gliding web formation), scar removal only with laser (including residual mucosa above the scar); two groups of five with valve mucosa introduced by Dedo et al Flap method, the laser to eliminate scar under the mucosal flap; 3 groups of 4, as the control group. The experimental group of 15 dogs in total 16 laser surgery. The surgical procedures are in binocular