In vivo Estimation of Tracheal Distensibility and Hysteresis in Normal Adults
Journal of Applied Physiology, 1987
Authors: V. Hoffstein, R. G. Castile, C. R. O’Donnell, G. M. Glass, D. J.
Strieder, M. E. B. Wohl, and J. J. Fredberg
Conclusion: “
Effect of Position and Lung Volume on Upper Airway Geometry
Journal of Applied Physiology, 1987 Authors: J. M. Fouke and K. P. Strohl Conclusion: “The occurrence of upper airway obstruction during sleep and with anesthesia suggests the possibility that upper airway size might be compromised by the gravitational effects of the supine position. We used an acoustic reflection technique to image airway geometry and made…
Differences in Pharyngeal Properties between Snorers with Predominantly Central Sleep Apnea and Those without Sleep Apnea
American Review of Respiratory Disease, 1987
Authors: T. D. Bradley, I. G. Brown, N. Zamel, E. A. Phillipson, and V.
Hoffstein
Conclusion: “
Pharyngeal Size in Snorers, Nonsnorers, and Patients with Obstructive Sleep Apnea
New England Journal of Medicine, 1986 Authors: T. D. Bradley, I. G. Brown, R. F. Grossman, N. Zamel, D. Martizez, E. A Phillipson, and V. Hoffstein Conclusion: “In summary, our findings indicate that patients with obstructive sleep apnea and snorers without apnea have abnormalities of the anatomical and mechanical features of the pharynx that distinguish…
Measurement of Upper Airway Movement by Acoustic Reflection
Annals of Biomedical Engineering, 1995
Authors: Y. Zhou and J. A. Daubenspeck
Conclusion: “
Pharyngieal Compliance in Snoring Subjects with and without Obstructive Sleep Apnea
American Review of Respiratory Disease, 1985 Authors: I. G. Brown, T. D. Bradley, E. A. Phillipson, N. Zamel, and V. Hoffstein Conclusion: “Previous studies employing the acoustic reflection technique, X- ray cephalometry, fluoroscopy, and computerized tomography have shown reduced upper airway caliber in patients with OSA. Our results confirm these findings by demonstrating that patients…
Reproducibility and Accuracy of Airway Area by Acoustic Reflection
Journal of Applied Physiology, 1984 Authors: L. J. Brooks, R. G. Casitle, G. M. Glass, N. T. Griscom, M. E. B. Wohl, and J. J. Fredberg Conclusion: “We conclude that the measurement of Airway Area by Acoustic Reflection yields accurate and highly reproducible results that may be clinically useful for the noninvasive detection of changes…
Upper Airway Morphology in Patients with Idiopathic Obstructive Sleep Apnea
American Review of Respiratory Disease, 1984 Authors: J. Rivlin, V. Hoffstein, J. Kalbfleisch, W. MnNicholas, N. Zamel, and A. C. Bryan Conclusion: “The acoustic technique is performed in the awake state and needs a minimal degree of patient cooperation. The good correlation between pharyngeal cross-sectional area and the severity of the disorder may give us…
Acoustic Reflection Technology for Assessing Pharyngeal Size — faster, more specific, lower cost
American Review of Respiratory Disease, 1984 Authors: Rivlin, Hoffstein, Kalbfleisch, McNicholas, Zamel, Bryan Conclusion: “This study demonstrates that sitting awake patients with idiopathic OSA have significantly smaller cross sectional areas of the pharynx and the glottis than do subjects without OSA. This study also demonstrates and anatomic predisposition to the development of upper airway occlusion…
Lung volume Dependence of Pharyngeal Cross-Sectional Area in Patients with Obstructive Sleep Apnea
American Review of Respiratory Disease, 1984 Authors: V. Hoffstein, N. Zamel, and E. A. Phillipson Conclusion: “We examined the relationship between lun volume and pharyngeal cross-sectional area (with acoustic reflection) in 9 obese patients with obstructive sleep apnea and 10 age-matched, obese subjects without sleep apnea. The results indicate that in obese patients with obstructive…
Tracheal Stenosis Measured by the Acoustic Reflection Technique
American Review of Respiratory Disease, 1984
Authors: V. Hoffstein and N. Zamel
Conclusion: “