Regenbogen E
Department of Otolaryngology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY 10467.
Laryngoscope. 1989 Jul;99(7 Pt 1):711-5. doi: 10.1288/00005537-198907000-00009.
Although compensation of voice with unilateral recurrent laryngeal nerve paralysis is commonly held to be the result of the unaffected vocal fold crossing past midline, or overcrossing, this mechanism of compensation has rarely been documented accurately. Beagle dogs were used to create a model of another proposed mechanism of compensation, known as midline drift. Six animals underwent sectioning of the left recurrent laryngeal nerve. One week later, three of the dogs underwent removal of the left posterior and lateral cricoarytenoid muscles. The effects of these procedures were studied by subjective assessment, direct laryngoscopy, and sound spectrographic analysis. Results indicate that glottal closure was improved after the second surgical procedure. The clinical implications of the results are discussed and compared with other manners of compensation hypothesized in the literature.
虽然单侧喉返神经麻痹后的嗓音代偿通常被认为是健侧声带越过中线或过度交叉的结果，但这种代偿机制很少得到准确记录。比格犬被用于建立另一种提出的代偿机制模型，即中线漂移模型。六只动物接受了左侧喉返神经切断术。一周后，其中三只狗接受了左侧后外侧环杓肌切除术。通过主观评估、直接喉镜检查和频谱分析研究了这些手术的效果。结果表明，第二次手术后声门关闭情况有所改善。讨论了该结果的临床意义，并与文献中假设的其他代偿方式进行了比较。
