Accuracy of acoustic rhinometry versus computed tomography in the evaluation of nasal cavity in patients with nasal polyposis

作者：Munoz Cano R^*; Salvador R; Valero A; Berenguer J; Alobid I; Bartra J; Guilemany J M; Mullol J; Picado C C

来源：Rhinology, 2010, 48(2): 224-227.

DOI：10.4193/Rhin09.067

• accuracy
• acoustic rhinometry
• CT-scan
• nasal polyps
• nasal nitric oxide

Background: Acoustic rhinometry (AR) accuracy in the diagnosis and follow-up of nasal polyps is as yet unclear. Our objective was to study its accuracy compared with computed tomography (CT) in patients with nasal polyps.
Methods: We studied 29 patients diagnosed of nasal polyposis by nasal endoscopy. In all patients sinunasal CT-scan, AR and nasal nitric oxide (NO) were assessed. Nasal volumes between 0 and 5 (V0-5) and 5 and 9 (V5-9) centimetres from nasal inlet were measured with AR and CT-scan, by using Pearson and intra class correlation coefficient tests.
Results: All patients (29,79% males, mean age 48.2 yr [range 34-61]) had nasal polyps (score 2-3 on Lildholdt classification, score 0-3). Measurements (right plus left sides) were: AR 8.9 +/- 0.8 cm3 (V0-5) and 15.5 +/- 3.6 cm3 (V5-9); CT 6.5 +/- 0.4 cm3 (V0-5) and 6.3 +/- 0.8 cm3 (V5-9). Pearson correlation was r = 0.67 (p < 0.01) for V0-5 and r = 0.62 (p < 0.05) for V5-9. Intraclass correlation coefficient test was 0.51 (V0-5) and 0.28 (V5-9) for consistency; and 0.43 (V0-5) and 0.23 (V5-9) for absolute agreement. Low levels of NO (312.3 +/- 43.8 ppb) were found and the correlation between NO levels and volumes (V0-5 or V0-9) measured by AR was not statistically significant.
Conclusions: Compared to CT-scan, AR measurements accurately reflect the geometry of nasal cavity volumes in patients with nasal polyps, with a better assessment in the anterior part of the nasal cavity.

• 出版日期2010-6