To obtain a mathematical equation that could estimate the length of the intermembranous part of the vocal fold as a function of body height and gender, we removed the larynges from 39 cadavers (22 men and 17 women) after recording the subject's height, age, and cause of death. The dimensions of the vocal folds were determined with a digital pachymeter. The following equations were obtained: y = 0.18x - 15.8 for men and y = 0.24x - 28.1 for women, where y is the length of the intermembranous part of the vocal folds in millimeters and x is the height of the individual in centimeters. We conclude that it is possible to estimate the normal expected length of the intermembranous portion of the male and female vocal folds on the basis of body height.
Several materials have been injected or introduced in the vocal folds in attempt of solving the glottic insufficiency. However, few studies have evaluated the cicatricial process due to the implantation of these materials. Aim: The objective of this research was to evaluate the concentration of collagen after microsurgery graft of muscular fascia and fat in the vocal folds of rabbit. Study design: experimental. Material and Method: Nineteen rabbits were submitted to the graft insert in the right vocal fold, being nine of fascia and ten of fat. The left vocal fold was submitted to the same process, except for the insertion of fat or fascial graft. The rabbits were sacrificed after 90 and 180 days. The collagen was analyzed through the method of the Picrosirius-polarization using the Image Pro Plus software. Results: There was prevalence of the collagen in all grafted groups when compared with the group control. The concentration of the collagen found in the rabbits submitted to fat graft was significantly larger when compared to the concentration of the rabbits submitted to graft of muscular fascia, either with 90 as with 180 days. Conclusion: The fat and muscular fascia implantation in the vocal folds of rabbit promoted production of collagen, being more intense with fat.
Gl ottic insufficiency has been managed since the beginning of the twentieth century. The autologous grafts, as fat and muscular fascia, have shown safety and good results. The authors discuss the advantages and disadvantages of using fat and fascia in the management of glottic insufficiency, regarding historical aspects, inflammatory process and surgical techniques.
Em algumas situações clínicas ou durante procedimentos cirúrgicos sobre o arcabouço laríngeo, faz-se importante o conhecimento preciso das dimensões das pregas vocais. OBJETIVO: Avaliar a existência de correlação entre as características dos indivíduos estudados como altura, peso, idade e sexo com as dimensões macroscópicas da porção membranosa das pregas vocais. FORMA DO ESTUDO: Experimental. MÉTODOS: Foram estudados 24 cadáveres do Serviço de Verificação de Óbito entre Abril e Outubro de 2001, sendo 13 homens e 11 mulheres. De cada indivíduo, foram obtidos os dados de altura, peso e idade com posterior remoção da laringe. Foi utilizado paquímetro digital para as medidas das dimensões das pregas vocais. RESULTADOS: Não foram encontradas diferenças entre as pregas vocais direita e esquerda quanto ao comprimento (p=0,91), largura (p=0,93) ou espessura (p=0,72). As pregas vocais masculinas foram maiores (p<0,001) e mais largas (p=0,04) que as femininas, não havendo diferença quanto à espessura (p=0,11). Foi observada uma forte correlação (r=0,76) entre a altura dos indivíduos e o comprimento das pregas vocais. Não houve correlação entre altura e largura (r=0,36) ou espessura (r=0,39) das pregas vocais. CONCLUSÕES: As pregas vocais masculinas foram maiores e mais largas do que as femininas. O comprimento da porção membranosa das pregas vocais variou em função da altura dos indivíduos.
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