Anna S Englhard1, Maximilian Wiedmann2, Georg J Ledderose1, Bryan Lemieux3, Alan Badran3, Joseph C Jing2, Zhongping Chen2, Veronika Volgger1, Brian J F Wong3,4. 1. Department of Otolaryngology-Head and Neck Surgery, Ludwig Maximilian University of Munich, Munich, Germany. 2. Department of Biomedical Engineering, University of California, Irvine, Orange, California, U.S.A. 3. Beckman Laser Institute, University of California, Irvine, Orange, California, U.S.A. 4. Department of Otolaryngology-Head and Neck Surgery, University of California, Irvine, Orange, California, U.S.A.
Abstract
OBJECTIVE: Previously, we proposed long-range optical coherence tomography (LR-OCT) to be an effective method for the quantitative evaluation of the nasal valve geometry. Here, the objective was to quantify the reduction in the internal nasal valve angle and cross-sectional area that results in subjective nasal airway obstruction and to evaluate the dynamic behavior of the valve during respiration using LR-OCT. METHODS: For 16 healthy individuals, LR-OCT was performed in each naris during: 1) normal respiration, 2) peak forced inspiration, 3) lateral nasal wall depression (to the onset of obstructive symptoms), and 4) after application of a topical decongestant. The angle and the cross-sectional area of the valve were measured. RESULTS: A reduction of the valve angle from 18.3° to 14.1° (11° in Caucasians and 17° in Asians) and a decrease of the cross-sectional area from 0.65 cm2 to 0.55 cm2 led to subjective nasal obstruction. Forceful breathing did not significantly change the internal nasal valve area in healthy individuals. Application of nasal decongestant resulted in increased values. CONCLUSION: LR-OCT proved to be a fast and readily performed method for the evaluation of the dynamic behavior of the nasal valve. The values of the angle and the cross-sectional area of the valve were reproducible, and changes in size could be accurately delineated. LEVEL OF EVIDENCE: 2b. Laryngoscope, 128:E105-E110, 2018.
OBJECTIVE: Previously, we proposed long-range optical coherence tomography (LR-OCT) to be an effective method for the quantitative evaluation of the nasal valve geometry. Here, the objective was to quantify the reduction in the internal nasal valve angle and cross-sectional area that results in subjective nasal airway obstruction and to evaluate the dynamic behavior of the valve during respiration using LR-OCT. METHODS: For 16 healthy individuals, LR-OCT was performed in each naris during: 1) normal respiration, 2) peak forced inspiration, 3) lateral nasal wall depression (to the onset of obstructive symptoms), and 4) after application of a topical decongestant. The angle and the cross-sectional area of the valve were measured. RESULTS: A reduction of the valve angle from 18.3° to 14.1° (11° in Caucasians and 17° in Asians) and a decrease of the cross-sectional area from 0.65 cm2 to 0.55 cm2 led to subjective nasal obstruction. Forceful breathing did not significantly change the internal nasal valve area in healthy individuals. Application of nasal decongestant resulted in increased values. CONCLUSION:LR-OCT proved to be a fast and readily performed method for the evaluation of the dynamic behavior of the nasal valve. The values of the angle and the cross-sectional area of the valve were reproducible, and changes in size could be accurately delineated. LEVEL OF EVIDENCE: 2b. Laryngoscope, 128:E105-E110, 2018.
Authors: Michael G Stewart; David L Witsell; Timothy L Smith; Edward M Weaver; Bevan Yueh; Maureen T Hannley Journal: Otolaryngol Head Neck Surg Date: 2004-02 Impact factor: 3.497
Authors: Anna S Englhard; Maximilian Wiedmann; Georg J Ledderose; Bryan Lemieux; Alan Badran; Zhongping Chen; Christian S Betz; Brian J Wong Journal: Laryngoscope Date: 2015-11-24 Impact factor: 3.325
Authors: Veronika Volgger; Giriraj K Sharma; Joseph C Jing; Ya-Sin A Peaks; Anthony Chin Loy; Frances Lazarow; Alex Wang; Yueqiao Qu; Erica Su; Zhongping Chen; Gurpreet S Ahuja; Brian J-F Wong Journal: Int J Pediatr Otorhinolaryngol Date: 2014-11-25 Impact factor: 1.675
Authors: Marc Rubinstein; Allison C Hu; Phil-Sang Chung; Jason H Kim; Kathryn E Osann; Paul Schalch; William B Armstrong; Brian J F Wong Journal: Lasers Med Sci Date: 2020-04-27 Impact factor: 3.161