Rinometria acústica: correlação anatômica dos dois primeiros entalhes encontrados no rinograma

Abstract

The graphic obtained by acoustic rhinometry in Caucasian adult individuals with no nasal affections clearly shows two notches at the beginning of the nasal echogram. However, there are controversies in the literature concerning their anatomic correlation. Aim: The aim of this study was to obtain data that would contribute to the anatomic correlation of these two notches. Study Design: Clinical prospective. Material and Method: We analyzed the nasal echogram of 35 volunteers in basal conditions, after decongestion and after obstruction of the nasal valve by using cotton impregnated with Vaseline. Results: We identified statistically significant reduction and increase of the cross-sectional area only for the second notch after obstruction of the nasal valve and after decongestion, respectively. Conclusion: The analysis of the results suggested that the first notch of the nasal echogram refers to the nostril and the second notch refers to the nasal valve as a whole.

Válvula nasal: anatomia e fisiologia

“…Nigro et al 39 believe that in normal Caucasians, the second notch in the rhinogram represents the entire NV. Such notch starts at the ostium internum and its CSA represents the isthmus nasi area.…”

“…Such notch starts at the ostium internum and its CSA represents the isthmus nasi area. After using the VC agent, the second notch moves anteriorly, and this happens because with a reduction in the NV's mucosal component present from the isthmus nasi, the ostium internum starts having a lower CSA than that of the isthmus nasi or the isthmus nasi CSA increases, but its CSA continues to be lower than that of the ostium internum 39 . The external nasal dilator used before and after the VC agent helps to differentiate.…”

Effect of Improved Nasal Airflow After Adenoidectomy on Nasal Erectile Tissue

“…It also provides information on nasal volume. 7,8,16,17 Some studies [4][5][6] have already used acoustic rhinometry to observe nasal geometry changes after treatment of nasal obstruction. The objective of this study is to assess the effect of improved nasopharyngeal airflow after adenoidectomy on nasal turbinate erectile tissue in pediatric patients.…”

A influência da obstrução das vias aéreas superiores na determinação do tipo facial

“…Esse exame se torna, assim, uma ferramenta importante no auxílio para se diagnosticar a causa da respiração oral, já que a obstrução pode não estar localizada na região da naso e orofaringe (Rubin, 1979;Alcazar et al, 2004 A região da válvula nasal (MCA1), quando comparada com a segunda porção da cavidade nasal (MCA2), foi a que se apresentou com a menor área para 36 das 41 crianças deste estudo, comprovando que MCA1 é onde se localizam os segmentos mais estreitos da cavidade nasal (Cole e Roithmann, 1996;Nigro, 2004 Mais importante do que existir diferença entre os tipos faciais, avaliando-se apenas os lados, é saber se há diferença na área total (AT). A Tabela 5.6 mostra que existe alguma diferença entre os biótipos (p=0,037; p<0,05) para AT em MCA1.…”

“…A região de maior resistência nasal e de maior importância para o fluxo aéreo se encontra na porção anterior das cavidades nasais, que compreende a narina e a válvula nasal (Nigro, 2004).…”