When static meets dynamic: Comparing cone-beam computed tomography and acoustic reflection for upper airway analysis

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2016-10-01

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INTRODUCTION: Upper airway measurement can be important for the diagnosis of breathing disorders. Acoustic reflection (AR) is an accepted tool for studying the airway. Our objective was to investigate the differences between cone-beam computed tomography (CBCT) and AR in calculating airway volumes and areas. METHODS: Subjects with prescribed CBCT images as part of their records were also asked to have AR performed. A total of 59 subjects (mean age, 15 ± 3.8 years) had their upper airway (5 areas) measured from CBCT images, acoustic rhinometry, and acoustic pharyngometry. Volumes and minimal cross-sectional areas were extracted and compared with software. RESULTS: Intraclass correlation on 20 randomly selected subjects, remeasured 2 weeks apart, showed high reliability (r >0.77). Means of total nasal volume were significantly different between the 2 methods (P = 0.035), but anterior nasal volume and minimal cross-sectional area showed no differences (P = 0.532 and P = 0.066, respectively). Pharyngeal volume showed significant differences (P = 0.01) with high correlation (r = 0.755), whereas pharyngeal minimal cross-sectional area showed no differences (P = 0.109). The pharyngeal volume difference may not be considered clinically significant, since it is 758 mm3 for measurements showing means of 11,000 ± 4000 mm3. CONCLUSIONS: CBCT is an accurate method for measuring anterior nasal volume, nasal minimal cross-sectional area, pharyngeal volume, and pharyngeal minimal cross-sectional area.

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Alonso

Aurelio A. Alonso

Associate Professor of Anesthesiology

Dr. Alonso is an Associate Professor in the Department of Anesthesiology at Duke University School of Medicine and Director of Orofacial Pain at  Duke Innovative Pain Therapies site located in the Brier Creek area of Raleigh, NC. Dr. Alonso is an internationally respected orofacial pain physician and is a Diplomate of the American Board of Orofacial Pain and Diplomate of the American Board of Dental Sleep Medicine,  and a Fellow of the American Academy of Orofacial Pain. In addition, he is the only boarded Orofacial pain physician at Duke. 

Dr. Alonso provides patients with innovative pain therapies as a member of the Center for Translational Pain Medicine (CTPM) team. The CTPM further expands Duke's existing clinical and research program in innovative pain therapies by bringing together leading basic scientists, clinicians, and clinical researchers. Dr. Alonso shares with the CTPM team the common core mission of unraveling the causes of painful conditions to better improve patient care. Dr. Alonso's focus area includes Orofacial pain, Temporomandibular disorders, headaches, Neuropathic Orofacial pain, and sleep disorder treatment.


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