Correlation between Fiberoptic Nasal Endoscopy and Acoustic Rhinometry in Adults without Nasal Complaints

Abstract

The results confirm an anatomic correlation between the two examination methods, identifying the first constriction as the nasal valve, the second constriction as the head of the inferior nasal turbinate, and the third constriction as the head of the middle turbinate. The fourth constriction did not correspond to the choanal region.

A systematic review to assess the anatomical correlates of the notches in acoustic rhinometry

“…Twenty‐one articles were identified relating to acoustic rhinometry, rhinogram, nasal echogram or NV. The cross‐sectional area of the first notch (CSA1) appears immediately after 0 cm and appears to correspond to the NV, 11–19 the ‘ isthmus nasi ’, 6,20–22 ‘probably’ the ‘ ostium internum ’, 23 an area near the NV, 24 the junction of the nosepiece and the nostril, 25,26 the junction of the nosepiece and the ‘ isthmus nasi ’, 27 the nostril 28 or it may also be artefactual 29,30 (Table 1). The cross‐sectional area of the second notch (CSA2) appears to correspond to the anterior end of the inferior turbinate 6,11–15,17–24,30 or to the NV 25–28,31 (Table 2).…”

“…Corey et al. 24 stated that the anatomical correlation of the CSA1 is not clearly delineated, but seems to correspond to the region ‘near the NV’, and in another similar study the authors affirm that the CSA1 is the NV 19 . Their assertion was based on the fact that, in both studies, the CSA1 was much more anteriorly‐located than the endoscopically‐measured distance from the NV.…”

“…Other authors 34 have detected changes in the CSA1 by applying an external nasal dilator and after using a decongestant 19 . They use another equipment: RhinoMetrics.…”

Nasal Airway Volume and Resistance to Airflow

“…Rhinomanometry and acoustic rhinometry are widely used for quantifying nasal patency. [1][2][3][4][14][15][16] Instead of using a nozzle or a facemask, the Toronto System of active posterior rhinomanometry 8-10 uses a headout body plethysmograph, which, although cumbersome, avoids the risk of artifacts that can result from displacement of compliant anterior nasal tissues by adjoining labial and other mobile facial tissues by a facemask. The head-out body plethysmograph has many different uses, and it accommodates all patients comfortably and independently of body and head size and children prefer it to a facemask.…”

Dimensões internas nasais de crianças com fissura de lábio e palato unilateral aferidas por rinometria acústica

“…Alternativamente, é possível calcular a área de secção transversa mínima nasal (ASTM), que tem como vantagem ser uma medida fluxo-independente, ou seja, é a mesma em qualquer fluxo respiratório, ao contrário da resistência nasal, que varia na dependência do esforço respiratório (Warren e Drake 1993, Bertier e Trindade 2007. A válvula nasal é a área estimada; porém, se outras constrições significantes estão presentes, a área obtida é uma composição delas (Warren e Drake 1993 2000, Wilson et al (2001), Fonseca et al (2003), Ouriques et al (2006), Castano et al (2007) e Doruk et al (2007).…”