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为观察延期神经再支配环杓后肌的收缩特性，比较不同神经再支配方法的疗效，我们选择24只犬，在右喉返神经切断后，于即刻，4，6，8，10和12个月时，分别以2只犬行选择性膈神经与喉返神经吻合（切断内收肌支）支配有环杓后肌（神经吻合组）；另12只大分别以2只行颈袢胸骨甲状肌蒂植入右环杓后肌（神经植入组）。术后饲养6个月，测定环杓后肌收缩强度及时间。结果表明，两组术侧的环杓后肌收缩力恢复率随病程延长而下降，但神经吻合组6个月内术侧环杓后肌收缩力与健侧无明显差异，且各时间神经吻合组收缩强度恢复率较神经植入组高，而收缩时间两组术侧与健侧无明显差异。表明环杓后肌收缩特性的定量测定能准确反映神经再支配的状况，故延期神经再支配手术越早进行效果越好，且选择神经吻合法疗效最好。
To observe the contractile properties of the posterior retina of the sclaregulis and to compare the efficacy of different methods of reassignment, 24 dogs were selected, and immediately after the right recurrent laryngeal nerve was cut off, 4, 6, 8, 10 and 12 At month 2, the selective phrenic nerve of the two dogs was anastomosed with the recurrent laryngeal nerve (the adductor muscle was cut off) and the posterior cricoaryoid muscle (nerve anastomosis group) was dominated. In the other 12 rats, Muscle pedicles were implanted into the right posterior cricoaryoid muscle (nerve implant group). After 6 months of rearing, the contractile strength and time of the posterior ciliate were measured. The results showed that the contractile force recovery rate of the posterior ciliate of both groups decreased with the prolongation of the duration, but there was no significant difference between contralateral crescent muscle contractility and contralateral muscle within 6 months after operation Group contraction strength recovery rate higher than the nerve implantation group, while the contraction time of the two groups no significant difference between the operative and contralateral. The results showed that the quantitative determination of the contractile response of the posterior ring scoops can accurately reflect the state of retarded retaliation. Therefore, the earlier the retarded retaliation surgery is, the better the neurological anastomosis is.