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Journal articles on the topic 'Airflow perturbation device'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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1

Lausted, Christopher G., and Arthur T. Johnson. "Respiratory resistance measured by an airflow perturbation device." Physiological Measurement 20, no. 1 (1999): 21–35. http://dx.doi.org/10.1088/0967-3334/20/1/002.

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2

Lopresti, Erika R., Arthur T. Johnson, Frank C. Koh, William H. Scott, Shaya Jamshidi, and Nischom K. Silverman. "Testing limits to airflow perturbation device (APD) measurements." BioMedical Engineering OnLine 7, no. 1 (2008): 28. http://dx.doi.org/10.1186/1475-925x-7-28.

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3

Z. Rausch, Nicholas, Arthur T. Johnson, and Jafar Vossoughi. "Diurnal Effects of Respiratory Resistance using an Airflow Perturbation Device." Archives of Pulmonology and Respiratory Medicine 1, no. 1 (2018): 42–49. http://dx.doi.org/10.22259/2639-362x.0101005.

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4

Johnson, Arthur T., and Manjit S. Sahota. "Validation of airflow perturbation device resistance measurements in excised sheep lungs." Physiological Measurement 25, no. 3 (2004): 679–90. http://dx.doi.org/10.1088/0967-3334/25/3/008.

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5

Goldman, Michael D., James Lemert, Jafar Vossoughi, Arthur Johnson, Nischom Silverman, and Constantine K. Saadeh. "AIRFLOW PERTURBATION DEVICE REFLECTS FORCED OSCILLATION INDICES OF PERIPHERAL AIRWAY OBSTRUCTION." Chest 130, no. 4 (2006): 160S. http://dx.doi.org/10.1378/chest.130.4_meetingabstracts.160s-e.

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6

Silverman, Nischom K., Arthur T. Johnson, William H. Scott, and Frank C. Koh. "Exercise-induced respiratory resistance changes as measured with the airflow perturbation device." Physiological Measurement 26, no. 1 (2004): 29–38. http://dx.doi.org/10.1088/0967-3334/26/1/003.

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7

Gallena, Sally K., Nancy Pearl Solomon, Arthur T. Johnson, Jafar Vossoughi, and Wei Tian. "Test–Retest Reliability of Respiratory Resistance Measured With the Airflow Perturbation Device." Journal of Speech, Language, and Hearing Research 57, no. 4 (2014): 1323–29. http://dx.doi.org/10.1044/2014_jslhr-s-13-0246.

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Purpose In this study, the authors aimed to determine reliability of the airflow perturbation device (APD) to measure respiratory resistance within and across sessions during resting tidal (RTB) and postexercise breathing in healthy athletes, and during RTB across trials within a session in athletes with paradoxical vocal fold motion (PVFM) disorder. Method Prospective, repeated-measures design. The APD measured respiratory resistance during 3 baseline assessments in 24 teenage female athletes, 12 with and 12 without PVFM. Control athletes provided data at rest and following a customized exerc
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8

Whitesell, Peter, John Whitesell, Jafar Vossoughi, and Arthur Johnson. "Comparison of Airflow Perturbation Device and Impulse Oscillometry Measurements of Airway Resistance." Chest 142, no. 4 (2012): 783A. http://dx.doi.org/10.1378/chest.1388780.

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9

Montgomery, Mary Kate, Allen Luk, Arthur T. Johnson, and Jafar Vossoughi. "Testing Low Doses of Caffeine on Respiratory Resistance Using the Airflow Perturbation Device." Open Journal of Respiratory Diseases 07, no. 02 (2017): 53–61. http://dx.doi.org/10.4236/ojrd.2017.72006.

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10

Lemert, James, Michael D. Goldman, Arthur Johnson, Jafar Vossoughi, Nischom Silverman, and Constantine K. Saadeh. "PORTABLE HANDHELD AIRFLOW PERTURBATION DEVICE REFLECTS FORCED OSCILLATION RESISTANCE IN CHILDREN WITH ASTHMA." Chest 130, no. 4 (2006): 241S. http://dx.doi.org/10.1378/chest.130.4_meetingabstracts.241s-c.

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11

Gallena, Sally J. K., Nancy Pearl Solomon, Arthur T. Johnson, Jafar Vossoughi, and Wei Tian. "The Effect of Exercise on Respiratory Resistance in Athletes With and Without Paradoxical Vocal Fold Motion Disorder." American Journal of Speech-Language Pathology 24, no. 3 (2015): 470–79. http://dx.doi.org/10.1044/2015_ajslp-14-0110.

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Purpose An investigational, portable instrument was used to assess inspiratory (R i ) and expiratory (R e ) resistances during resting tidal breathing (RTB), postexercise breathing (PEB), and recovery breathing (RB) in athletes with and without paradoxical vocal fold motion disorder (PVFMD). Method Prospective, controlled, repeated measures within-subject and between-groups design. Twenty-four teenage female athletes, 12 with and 12 without PVFMD, breathed into the Airflow Perturbation Device for baseline measures of respiratory resistance and for two successive 1-min trials after treadmill ru
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12

Pan, J., A. Saltos, D. Smith, A. Johnson, and J. Vossoughi. "Comparison of Respiratory Resistance Measurements Made with an Airflow Perturbation Device with Those from Impulse Oscillometry." Journal of Medical Engineering 2013 (April 4, 2013): 1–11. http://dx.doi.org/10.1155/2013/165782.

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The airflow perturbation device (APD) has been developed as a portable, easy to use, and a rapid response instrument for measuring respiratory resistance in humans. However, the APD has limited data validating it against the established techniques. This study used a mechanical system to simulate the normal range of human breathing to validate the APD with the clinically accepted impulse oscillometry (IOS) technique. The validation system consisted of a sinusoidal flow generator with ten standardized resistance configurations that were shown to represent a total range of resistances from 0.12 t
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13

Coursey, D. C., S. M. Scharf, and A. T. Johnson. "Comparing pulmonary resistance measured with an esophageal balloon to resistance measurements with an airflow perturbation device." Physiological Measurement 31, no. 7 (2010): 921–34. http://dx.doi.org/10.1088/0967-3334/31/7/004.

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14

Rostami, N., M. Bautista, A. Johnson, J. Vossoughi, and M. Kezsler. "673 Pre and Post Bronchodilator Airway Resistance Values in Children with Asthma Using Airflow Perturbation Device (Apd)." Archives of Disease in Childhood 97, Suppl 2 (2012): A194—A195. http://dx.doi.org/10.1136/archdischild-2012-302724.0673.

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15

Lewis, O. Dene, Peter Whitesell, John Whitesell, Wesley Granger, Jafar Vossoughi, and Arthur Johnson. "Changes in Respiratory Measurements With the Airflow Perturbation Device and the Integrated Pulmonary Index in Patients Enrolled in Cardiac and Pulmonary Rehabilitation." Chest 150, no. 4 (2016): 1123A. http://dx.doi.org/10.1016/j.chest.2016.08.1232.

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16

Zeng, Yicheng, Aurélie Laguerre, Elliott T. Gall, Mohammad Heidarinejad, and Brent Stephens. "Experimental Evaluations of the Impact of an Additive Oxidizing Electronic Air Cleaner on Particles and Gases." Pollutants 2, no. 2 (2022): 98–134. http://dx.doi.org/10.3390/pollutants2020010.

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Electronic air cleaning (EAC) technologies have garnered significant attention for use in buildings. Many EAC technologies rely on the addition of reactive constituents to indoor air to react with gas-phase compounds, enhance particle deposition, and/or inactivate microorganisms. However, limited data are available on the efficacy of many EAC technologies and their potential to form chemical byproducts during operation. Here we experimentally evaluate the indoor air quality impacts, specifically targeting particles and gases but not microbial constituents, of a commercially available additive
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17

Hamza, M. M., S. Abdulsalam, and S. K. Ahmad. "Time-Dependent Magnetohydrodynamic (MHD) Flow of an Exothermic Arrhenius Fluid in a Vertical Channel with Convective Boundary Condition." Advances in Mathematical Physics 2023 (February 18, 2023): 1–13. http://dx.doi.org/10.1155/2023/7173925.

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The current study examined the effects of magnetohydrodynamics (MHD) on time-dependent mixed convection flow of an exothermic fluid in a vertical channel. Convective heating and Navier’s slip conditions are considered. The dimensional nonlinear flow equations are transformed into dimensionless form with suitable transformation. For steady-state flow formations, we apply homotopy perturbation approach. However, for the unsteady-state governing equation, we use numerical technique known as the implicit finite difference approach. Flow is influenced by several factors, including the Hartmann numb
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18

Johnson, Arthur T., Jafar Vossoughi, and James Pan. "Calibration of an Airflow Perturbation Device (APD)." Journal of Medical Devices 6, no. 1 (2012). http://dx.doi.org/10.1115/1.4026695.

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19

Wong, Lily S., and Arthur T. Johnson. "Decrease of resistance to air flow with nasal strips as measured with the airflow perturbation device." BioMedical Engineering OnLine 3, no. 1 (2004). http://dx.doi.org/10.1186/1475-925x-3-38.

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20

Johnson, Arthur T., Prakash Chapain, Darnell Slaughter, Sally Gallena, and Jafar Vossoughi. "Inspiratory and Expiratory Resistances During Exercise." April 2, 2013. https://doi.org/10.5281/zenodo.7956.

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Aims: Paradoxical vocal fold motion, especially during exercise, causes symptoms of dyspnea in patients experiencing this condition. At present, the standard means to diagnose this condition is invasive using a laryngoscope. The Airflow Perturbation Device (APD) could offer a simpler means of diagnosis and monitoring, but the APD must be validated with laryngoscopy. Both devices require access to the mouth, and so cannot be used simultaneously. The aim of this study was to determine if respiratory resistance of exercising subjects changes immediately after exercise begins and ends. Study Desig
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