Evaluation of nasal cavity by acoustic rhinometry in Chinese, Malay and Indian ethnic groups

Zl. Huang et al., Evaluation of nasal cavity by acoustic rhinometry in Chinese, Malay and Indian ethnic groups, ACT OTO-LAR, 121(7), 2001, pp. 844-848
Citations number
Categorie Soggetti
Otolaryngology,"da verificare
Journal title
ISSN journal
0001-6489 → ACNP
Year of publication
844 - 848
SICI code
Acoustic rhinometry (AR) evaluates the geometry of the nasal cavity by meas uring the minimum cross-sectional area (MCA) and nasal volume (V) by means of acoustic reflection. Understanding the normal and pathologic conditions of the internal nasal cavity using AR is important in the diagnosis of stru ctural abnormalities in patients, The aim of this study was to investigate the normal range of AR parameters in healthy volunteers from three ethnic g roups in Singapore: Chinese, Malay and Indian. We also attempted to evaluat e the role of these measurements in the documentation of structural abnorma lities in the nose. A total of 189 Singaporeans, aged greater than or equal to 18 years, were recruited from a nationwide survey study. They comprised 83 Chinese, 35 Malays and 71 Indians. Eighty-nine subjects had a rhinoscop ically normal nose (Group 1), 77 had significant septal deviation (Group 2) and 23 had inferior turbinate hypertrophy (Group 3). AR was performed to m easure the MCA at the anterior 1-5 cm from the nostril and the volume (V) b etween points at the nostril and 5 cm into the nose. A mean MCA (mMCA; equa l to (L + R)/2) and a total volume (V-t; equal to L + R) were then calculat ed for each subject, where L and R refer to the measurements made for the l eft and right nostrils, respectively. The results showed that there was no statistically significant difference in mMCA (p = 0.80) and V-t (p = 0.60) among the three ethnic subgroups of Group 1. Statistically significant diff erences were found only between Groups 1 and 3 (p < 0.001 for both mMCA and V and between Groups 2 and 3 (p = 0.001 for mMCA and p = 0.013 for V-t). A lthough there was no significant difference between Groups 1 and 2, signifi cant differences in MCA (p = 0.001) and V (p = 0.040) were found between th e narrower sides (smaller volume) and the wider sides in Group 2, indicatin g volume compensation between the nasal cavities. In conclusion, our study demonstrates that there is no significant difference in the normal range of AR measurements among Chinese, Malay and Indian ethnic groups. AR is able to determine the structural abnormality of the internal nasal cavity caused by septal deviation and inferior turbinate hypertrophy,