Artykuły w czasopismach: „Forced oscillation technique”

1

Nielsen, Kim G. "Forced oscillation technique". Paediatric Respiratory Reviews 7 (styczeń 2006): S8—S10. http://dx.doi.org/10.1016/j.prrv.2006.04.021.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

2

Thurgood, Jordan, Stephen Dubsky, Kentaro Uesugi, Michael Curtis, Chaminda R. Samarage, Bruce Thompson, Graeme Zosky i Andreas Fouras. "Imaging lung tissue oscillations using high-speed X-ray velocimetry". Journal of Synchrotron Radiation 23, nr 1 (1.01.2016): 324–30. http://dx.doi.org/10.1107/s1600577515021700.

Pełny tekst źródła

Streszczenie:

This work utilized synchrotron imaging to achieve a regional assessment of the lung's response to imparted oscillations. The forced oscillation technique is increasingly being used in clinical and research settings for the measurement of lung function. During the forced oscillation technique, pressure oscillations are imparted to the lungsviathe subjects' airway opening and the response is measured. This provides information about the mechanical properties of the airways and lung tissue. The quality of measurements is dependent upon the input signal penetrating uniformly throughout the lung. However, the penetration of these signals is not well understood. The development and use of a novel image-processing technique in conjunction with synchrotron-based imaging was able to regionally assess the lungs' response to input pressure oscillation signals in anaesthetized mice. The imaging-based technique was able to quantify both the power and distribution of lung tissue oscillations during forced oscillations of the lungs. It was observed that under forced oscillations the apices had limited lung tissue expansion relative to the base. This technique could be used to optimize input signals used for the forced oscillation technique or potentially as a diagnostic tool itself.

Style APA, Harvard, Vancouver, ISO itp.

3

Mochizuki, Hiroyuki, Kota Hirai i Hideyuki Tabata. "Forced Oscillation Technique and Childhood Asthma". Allergology International 61, nr 3 (2012): 373–83. http://dx.doi.org/10.2332/allergolint.12-rai-0440.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

4

Demedts, M., J. A. Van Noord i K. P. Van De Woestijne. "Clinical Applications of Forced Oscillation Technique". Chest 99, nr 4 (kwiecień 1991): 795–97. http://dx.doi.org/10.1378/chest.99.4.795.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

5

Ngo, Chuong, Falk Dippel, Sylvia Lehmann, Klaus Tenbrock, Thomas Vollmer, Berno Misgeld i Steffen Leonhardt. "The volume-dependent Forced Oscillation Technique". IFAC-PapersOnLine 51, nr 27 (2018): 373–77. http://dx.doi.org/10.1016/j.ifacol.2018.11.611.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

6

Chen, Zengshun, Yemeng Xu, Hailin Huang i Kam Tim Tse. "Wind Tunnel Measurement Systems for Unsteady Aerodynamic Forces on Bluff Bodies: Review and New Perspective". Sensors 20, nr 16 (17.08.2020): 4633. http://dx.doi.org/10.3390/s20164633.

Pełny tekst źródła

Streszczenie:

Wind tunnel tests have become one of the most effective ways to evaluate aerodynamics and aeroelasticity in bluff bodies. This paper has firstly overviewed the development of conventional wind tunnel test techniques, including high frequency base balance technique, static synchronous multi-pressure sensing system test technique and aeroelastic test, and summarized their advantages and shortcomings. Subsequently, two advanced test approaches, a forced vibration test technique and hybrid aeroelastic- force balance wind tunnel test technique have been comprehensively reviewed. Then the characteristics and calculation procedure of the conventional and advanced wind tunnel test techniques were discussed and summarized. The results indicated that the conventional wind tunnel test techniques ignored the effect of structural oscillation on the measured aerodynamics as the test model is rigid. A forced vibration test can include that effect. Unfortunately, a test model in a forced vibration test cannot respond like a structure in the real world; it only includes the effect of structural oscillation on the surrounding flow and cannot consider the feedback from the surrounding flow to the oscillation test model. A hybrid aeroelastic-pressure/force balance test technique that can observe unsteady aerodynamics of a test model during its aeroelastic oscillation completely takes the effect of structural oscillation into consideration and is, therefore, effective in evaluation of aerodynamics and aeroelasticity in bluff bodies. This paper has not only advanced our understanding for aerodynamics and aeroelasticity in bluff bodies, but also provided a new perspective for advanced wind tunnel test techniques that can be used for fundamental studies and engineering applications.

Style APA, Harvard, Vancouver, ISO itp.

7

Shirai, Toshihiro, i Hajime Kurosawa. "Clinical Application of the Forced Oscillation Technique". Internal Medicine 55, nr 6 (2016): 559–66. http://dx.doi.org/10.2169/internalmedicine.55.5876.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

8

Franken, H., M. Cauberghs, A. Ringelhann, J. Clement i K. P. Van de Woestijne. "Forced oscillation technique: comparison of two devices". Journal of Applied Physiology 59, nr 5 (1.11.1985): 1654–59. http://dx.doi.org/10.1152/jappl.1985.59.5.1654.

Pełny tekst źródła

Streszczenie:

The respiratory impedances in healthy subjects and patients with advanced obstructive lung disease were measured between 2 and 32 Hz, using two forced oscillation techniques: the setup used previously by Grimby et al. (J. Clin. Invest. 47: 1455–1465, 1968) and a modified device in which the pneumotachograph is replaced by a 2-m-long tube and the ratio of pressures at both ends of the tube is determined. The advantages of the latter device are that 1) its impedance and frequency characteristics can be predicted by classical physics, 2) the only requirement for correct measurements are a match of the pressure transducers, and 3) high-pass filters are not needed to suppress the influence of breathing. On the other hand, the device is more sensitive to the turbulences induced by the subject's own breathing. This drawback can be avoided by interposing a piece of tubing between the mouth and proximal pressure recording site.

Style APA, Harvard, Vancouver, ISO itp.

9

Gauld, Leanne M., Lucy A. Keeling, Claire E. Shackleton i Peter D. Sly. "Forced Oscillation Technique in Spinal Muscular Atrophy". Chest 146, nr 3 (wrzesień 2014): 795–803. http://dx.doi.org/10.1378/chest.14-0166.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

10

Shirai, Toshihiro, Keita Hirai, Yasuhiro Gon, Shuichiro Maruoka, Kenji Mizumura, Mari Hikichi, Kunihiko Itoh i Shu Hashimoto. "Forced oscillation technique may identify severe asthma". Journal of Allergy and Clinical Immunology: In Practice 7, nr 8 (listopad 2019): 2857–60. http://dx.doi.org/10.1016/j.jaip.2019.05.036.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

11

Desager, K. N., W. Buhr, M. Willemen, H. P. van Bever, W. de Backer, P. A. Vermeire i F. J. Landser. "Measurement of total respiratory impedance in infants by the forced oscillation technique". Journal of Applied Physiology 71, nr 2 (1.08.1991): 770–76. http://dx.doi.org/10.1152/jappl.1991.71.2.770.

Pełny tekst źródła

Streszczenie:

The forced oscillation technique according to Landser et al. (J. Appl. Physiol. 41:101–106, 1976) was modified for use in infants. Adaptations, including a flexible tube to connect the infant to the measuring system and a bias flow to avoid rebreathing, did not influence impedance values. The linearity of the respiratory system was assessed and confirmed by 1) applying pseudo-random noise oscillations at three different amplitudes to 7 infants and 2) comparing in 12 infants impedance values obtained with pseudo-random noise and with sinusoidal oscillations at 12 and 32 Hz. Intersubject variability, averaged for all frequencies, was 6%. In 17 infants the relative error (+/- SD) between two series of five measurements within a time interval of 15 min was 0.5 +/- 5.7%. No statistically significant difference was found between impedance values before and after repositioning of the infant's head, whereas rotation resulted in a decrease in resistance and no effect on reactance. Our results indicate that the infant-adapted forced pseudo-random noise oscillation technique has the potential to give valuable information about ventilatory lung function in infants.

Style APA, Harvard, Vancouver, ISO itp.

12

Saeed, Umer, i Mujeeb ur Rehman. "Haar Wavelet Operational Matrix Method for Fractional Oscillation Equations". International Journal of Mathematics and Mathematical Sciences 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/174819.

Pełny tekst źródła

Streszczenie:

We utilized the Haar wavelet operational matrix method for fractional order nonlinear oscillation equations and find the solutions of fractional order force-free and forced Duffing-Van der Pol oscillator and higher order fractional Duffing equation on large intervals. The results are compared with the results obtained by the other technique and with exact solution.

Style APA, Harvard, Vancouver, ISO itp.

13

Skylogianni, Eleni, Konstantinos Douros, Michael B. Anthracopoulos i Sotirios Fouzas. "The Forced Oscillation Technique in Paediatric Respiratory Practice". Paediatric Respiratory Reviews 18 (marzec 2016): 46–51. http://dx.doi.org/10.1016/j.prrv.2015.11.001.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

14

FREY, U. "Forced oscillation technique in infants and young children". Paediatric Respiratory Reviews 6, nr 4 (grudzień 2005): 246–54. http://dx.doi.org/10.1016/j.prrv.2005.09.010.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

15

Shirai, Toshihiro, Keita Hirai, Yasuhiro Gon, Shuichiro Maruoka, Kenji Mizumura, Mari Hikichi, Kunihiko Itoh i Shu Hashimoto. "Forced oscillation technique may identify asthma-COPD overlap". Allergology International 68, nr 3 (lipiec 2019): 385–87. http://dx.doi.org/10.1016/j.alit.2019.01.002.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

16

Young, S. S., i D. Tesarowski. "Respiratory mechanics of horses measured by conventional and forced oscillation techniques". Journal of Applied Physiology 76, nr 6 (1.06.1994): 2467–72. http://dx.doi.org/10.1152/jappl.1994.76.6.2467.

Pełny tekst źródła

Streszczenie:

Respiratory mechanics were compared using conventional and forced oscillation techniques in six conscious horses and a mechanical model of the equine respiratory system. The parameters calculated from conventional airflow and esophageal pressure measurements were pulmonary resistance and dynamic compliance. The impedance of the respiratory system was measured at 1, 2, and 3 Hz with the forced oscillation technique, and respiratory system resistance, compliance, inertance, and resonant frequency were calculated. Pulmonary resistance was 1.0 +/- 0.3 cmH2O.l-1.s, and pulmonary dynamic compliance was 2.4 +/- 0.6 l/cmH2O. With the use of the forced oscillation system, respiratory resistance was 1.61 +/- 0.50 cmH2O.l-1.s at 1 Hz, compliance was 0.195 +/- 0.075 l/cmH2O, inertance was 0.026 +/- 0.0095 cmH2O.l-1.s2, and resonant frequency was 2.40 +/- 0.25 Hz. Data collected from a model of the respiratory system showed a close correlation between resistance and compliance measured with the two systems. This study demonstrates that the forced oscillation technique is a useful method for noninvasive measurement of respiratory mechanics in horses.

Style APA, Harvard, Vancouver, ISO itp.

17

Maes, Hannes, Gerd Vandersteen, Michael Muehlebach i Clara Ionescu. "A Fan-Based, Low-Frequent, Forced Oscillation Technique Apparatus". IEEE Transactions on Instrumentation and Measurement 63, nr 3 (marzec 2014): 603–11. http://dx.doi.org/10.1109/tim.2013.2282188.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

18

Solymar, L., P.-H. Aronsson i R. Sixt. "The forced oscillation technique in children with respiratory disease". Pediatric Pulmonology 1, nr 5 (wrzesień 1985): 256–61. http://dx.doi.org/10.1002/ppul.1950010507.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

19

Desager, K. N., M. Cauberghs i K. P. Van de Woestijne. "Two-point calibration procedure of the forced oscillation technique". Medical and Biological Engineering and Computing 35, nr 6 (listopad 1997): 752–56. http://dx.doi.org/10.1007/bf02510989.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

20

Hellinckx, J., M. Cauberghs, K. De Boeck i M. Demedts. "Evaluation of impulse oscillation system: comparison with forced oscillation technique and body plethysmography". European Respiratory Journal 18, nr 3 (1.09.2001): 564–70. http://dx.doi.org/10.1183/09031936.01.00046401.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

21

Kastelik, J. A., I. Aziz, J. C. Ojoo i A. H. Morice. "Evaluation of impulse oscillation system: comparison with forced oscillation technique and body plethysmography". European Respiratory Journal 19, nr 6 (1.06.2002): 1214–20. http://dx.doi.org/10.1183/09031936.02.01922001.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

22

Zhang, Shao-Yan, i Qi-Ru Wang. "Interval Oscillation Criteria for Second-Order Forced Functional Dynamic Equations on Time Scales". Discrete Dynamics in Nature and Society 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/684068.

Pełny tekst źródła

Streszczenie:

This paper is concerned with oscillation of second-order forced functional dynamic equations of the form(r(t)(xΔ(t))γ)Δ+∑i=0n‍qi(t)|x(δi(t))|αisgn x(δi(t))=e(t)on time scales. By using a generalized Riccati technique and integral averaging techniques, we establish new oscillation criteria which handle some cases not covered by known criteria.

Style APA, Harvard, Vancouver, ISO itp.

23

Yamamoto, Shoichiro, Seigo Miyoshi, Hitoshi Katayama, Mikio Okazaki, Hisayuki Shigematsu, Yoshifumi Sano, Minoru Matsubara, Naohiko Hamaguchi, Takafumi Okura i Jitsuo Higaki. "Use of the forced-oscillation technique to estimate spirometry values". International Journal of Chronic Obstructive Pulmonary Disease Volume 12 (październik 2017): 2859–68. http://dx.doi.org/10.2147/copd.s143721.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

24

Swangtrakul, Napatsayod, i Wiparat Manuyakorn. "Vitamin D and Forced Oscillation Technique parameters in asthmatic children". Journal of Allergy and Clinical Immunology 141, nr 2 (luty 2018): AB99. http://dx.doi.org/10.1016/j.jaci.2017.12.316.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

25

Wesseling, G. J., I. M. Vanderhoven-Augustin i E. F. Wouters. "Forced oscillation technique and spirometry in cold air provocation tests." Thorax 48, nr 3 (1.03.1993): 254–59. http://dx.doi.org/10.1136/thx.48.3.254.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

26

Salhin, Ambarka Abdalla, Ummul Khair Salma Din, Rokiah Rozita Ahmad i Mohd Salmi Md Noorani. "Set of Oscillation Criteria for Second Order Nonlinear Forced Differential Equations with Damping". Discrete Dynamics in Nature and Society 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/545189.

Pełny tekst źródła

Streszczenie:

By employing a generalized Riccati technique and an integral averaging technique, some new oscillation criteria are established for the second order nonlinear forced differential equation with damping. These results extend, improve, and unify some known oscillation criteria in the existing literature.

Style APA, Harvard, Vancouver, ISO itp.

27

Agwa, Hassan A., Ahmed M. M. Khodier i Heba A. Hassan. "Interval Oscillation Criteria for Forced Second-Order Nonlinear Delay Dynamic Equations with Damping and Oscillatory Potential on Time Scales". International Journal of Differential Equations 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/3298289.

Pełny tekst źródła

Streszczenie:

We are concerned with the interval oscillation of general type of forced second-order nonlinear dynamic equation with oscillatory potential of the formrtg1xt,xΔtΔ+p(t)g2(x(t),xΔ(t))xΔ(t)+q(t)f(x(τ(t)))=e(t), on a time scaleT. We will use a unified approach on time scales and employ the Riccati technique to establish some oscillation criteria for this type of equations. Our results are more general and extend the oscillation criteria of Erbe et al. (2010). Also our results unify the oscillation of the forced second-order nonlinear delay differential equation and the forced second-order nonlinear delay difference equation. Finally, we give some examples to illustrate our results.

Style APA, Harvard, Vancouver, ISO itp.

28

KITAOKA, Hiroko, Haruhiko HIRATA i Takashi KIJIMA. "Temporal data analysis of respiratory impedance measured by forced oscillation technique". Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2019.31 (2019): 1D31. http://dx.doi.org/10.1299/jsmebio.2019.31.1d31.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

29

Horan, Thomas, Sergio Mateus, Paulo Beraldo, Luis Araújo, John Urschel, Estivan Urmenyi i Flávia Santiago. "Forced Oscillation Technique to Evaluate Tracheostenosis in Patients With Neurologic Injury". Chest 120, nr 1 (lipiec 2001): 69–73. http://dx.doi.org/10.1378/chest.120.1.69.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

30

Akamatsu, Taisuke, Toshihiro Shirai, Yukiko Shimoda, Takahito Suzuki, Ichiro Hayashi, Rie Noguchi, Eisuke Mochizuki i in. "Forced oscillation technique as a predictor of FEV1 improvement in asthma". Respiratory Physiology & Neurobiology 236 (luty 2017): 78–83. http://dx.doi.org/10.1016/j.resp.2016.11.013.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

31

Szabo, H., Z. Gyurkovits, B. Radics, B. Maár, H. Orvos, P. D. Sly i Z. Hantos. "Respiratory mechanics in healthy newborns studied with the forced oscillation technique". Paediatric Respiratory Reviews 13 (czerwiec 2012): S69. http://dx.doi.org/10.1016/s1526-0542(12)70113-6.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

32

FREY, URS, MICHAEL SILVERMAN, RICHARD KRAEMER i ANDREW C JACKSON. "High-frequency Respiratory Impedance Measured by Forced-Oscillation Technique in Infants". American Journal of Respiratory and Critical Care Medicine 158, nr 2 (sierpień 1998): 363–70. http://dx.doi.org/10.1164/ajrccm.158.2.9703038.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

33

Pairon, J. C., Y. Iwatsubo, C. Hubert, H. Lorino, H. Nouaigui, R. Gharbi i P. Brochard. "Measurement of bronchial responsiveness by forced oscillation technique in occupational epidemiology". European Respiratory Journal 7, nr 3 (1.03.1994): 484–89. http://dx.doi.org/10.1183/09031936.94.07030484.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

34

Descatha, Alexis, Claudine Fromageot, Jacques Ameille, Michèle Lejaille, Line Falaize, Alain Louis i Frédéric Lofaso. "Is Forced Oscillation Technique Useful in the Diagnosis of Occupational Asthma?" Journal of Occupational and Environmental Medicine 47, nr 8 (sierpień 2005): 847–53. http://dx.doi.org/10.1097/01.jom.0000169092.61814.0c.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

35

Evans, Denby J., Andre Schultz, Maureen Verheggen, Graham L. Hall i Shannon J. Simpson. "Identifying pediatric lung disease: A comparison of forced oscillation technique outcomes". Pediatric Pulmonology 54, nr 6 (18.03.2019): 751–58. http://dx.doi.org/10.1002/ppul.24286.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

36

Desager, K. N., M. Willemen, H. P. van Bever, W. de Backer i P. A. Vermeire. "Evaluation of nasal impedance using the forced oscillation technique in infants". Pediatric Pulmonology 11, nr 1 (1991): 1–7. http://dx.doi.org/10.1002/ppul.1950110102.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

37

Gupta, Samriti, i Sushil K. Kabra. "Indigenous Regression Equations for Forced Oscillation Technique – A Much Needed Affair". Indian Journal of Pediatrics 87, nr 3 (27.01.2020): 173–74. http://dx.doi.org/10.1007/s12098-020-03194-2.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

38

Kuzukawa, Yosuke, Junko Nakahira, Toshiyuki Sawai i Toshiaki Minami. "A Perioperative Evaluation of Respiratory Mechanics Using the Forced Oscillation Technique". Anesthesia & Analgesia 121, nr 5 (listopad 2015): 1202–6. http://dx.doi.org/10.1213/ane.0000000000000720.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

39

Wallström, Linda, Chiara Veneroni, Emanuela Zannin, Raffaele L. Dellacà i Richard Sindelar. "Forced oscillation technique for optimising PEEP in ventilated extremely preterm infants". European Respiratory Journal 55, nr 5 (20.02.2020): 1901650. http://dx.doi.org/10.1183/13993003.01650-2019.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

40

Neild, J. E., C. H. C. Twort, S. Chinn, S. McCormack, P. G. J. Burney i I. R. Cameron. "The Reliability of Respiratory Resistance Measured by the Forced Oscillation Technique". Clinical Science 71, s15 (1.01.1986): 8P—9P. http://dx.doi.org/10.1042/cs071008pb.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

41

Fanelli, Vito, Peter Spieth i Haibo Zhang. "Forced oscillation technique: an alternative tool to define the optimal PEEP?" Intensive Care Medicine 37, nr 8 (1.04.2011): 1235–37. http://dx.doi.org/10.1007/s00134-011-2215-3.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

42

Yooma, Pailin, Wiparat Manuyakorn, Suwat Benjaponpitak, Wasu Kamchaisatian, Watcharoot Kanchongkittiphon, Wanlapa Jotikasthira, Cherapat Sasisakulporn i Potjanee Kiewngam. "Role of Forced oscillation technique for asthma diagnosis in preschool wheeze". Journal of Allergy and Clinical Immunology 145, nr 2 (luty 2020): AB118. http://dx.doi.org/10.1016/j.jaci.2019.12.577.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

43

D'yachenko, A. I., i H. G. Nacke. "A device for monitoring respiratory mechanics by a forced oscillation technique". Biomedical Engineering 27, nr 2 (1993): 88–93. http://dx.doi.org/10.1007/bf00556627.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

44

Dias, Olívia Meira, Bruno Guedes Baldi, Rodrigo Caruso Chate, Carlos Roberto Ribeiro de Carvalho, Raffaele L. Dellacà, Ilaria Milesi i Andrèc) Luis Pereira de Albuquerque. "Forced Oscillation Technique and Small Airway Involvement in Chronic Hypersensitivity Pneumonitis". Archivos de Bronconeumología (English Edition) 55, nr 10 (październik 2019): 519–25. http://dx.doi.org/10.1016/j.arbr.2019.01.022.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

45

Dias, Olívia Meira, Bruno Guedes Baldi, Rodrigo Caruso Chate, Carlos Roberto Ribeiro de Carvalho, Raffaele L. Dellacà, Ilaria Milesi i André Luis Pereira de Albuquerque. "Forced Oscillation Technique and Small Airway Involvement in Chronic Hypersensitivity Pneumonitis". Archivos de Bronconeumología 55, nr 10 (październik 2019): 519–25. http://dx.doi.org/10.1016/j.arbres.2019.01.022.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

46

Bunk, D. A., W. J. Federspiel i A. C. Jackson. "Influence of Bifurcations on Forced Oscillations in an Airway Model". Journal of Biomechanical Engineering 114, nr 2 (1.05.1992): 216–21. http://dx.doi.org/10.1115/1.2891374.

Pełny tekst źródła

Streszczenie:

Forced oscillations is a technique to determine respiratory input impedance from small amplitude sinusoidal pressure excursions introduced at the airway opening. Models used to predict respiratory input impedance typically ignore the direct effect of bifurcations on the flow, and treat airway branches as individual straight tubes placed appropriately in parallel and series. The flow within the individual tubes is assumed equivalent to that which would occur in infinitely long tubes. In this study we examined the influence of bifurcations on impedance for conditions of the forced oscillatory technique. We measured input impedance using forced oscillations in straight tubes and in an anatomically-relevant, four generation physical model of a human airway network. The input impedance measured experimentally compared well to that obtained theoretically using model predictions. The predictive scheme was based on appropriate parallel and series combinations of theoretically computed individual tube impedances, which were computed from solutions to oscillatory flow of a compressible gas in an infinitely long rigid tube. The agreement between experimental measurements and predictions indicates that bifurcations play a relatively minor direct role on the flow impedance for conditions of the forced oscillations technique. These results are explained in terms of the small tidal volumes used, whereby the axial distance traveled by a fluid particle during an oscillation cycle is appreciably smaller than branch segment lengths. Accordingly, only a small fraction of fluid particles travel through the bifurcation region, and the remainder experience an environment approaching flow in an infinite straight tube. The relevance of the study to the prediction of impedances in the human lung during forced oscillations is discussed.

Style APA, Harvard, Vancouver, ISO itp.

47

Weersink, E. J. M., F. J. J. v.d. Elshout, C. v. Herwaarden i H. Folgering. "Bronchial responsiveness to histamine and methacholine measured with forced expirations and with the forced oscillation technique". Respiratory Medicine 89, nr 5 (maj 1995): 351–56. http://dx.doi.org/10.1016/0954-6111(95)90007-1.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

48

Ngo, Chuong, Sarah Spagnesi, Carlos Munoz, Sylvia Lehmann, Thomas Vollmer, Berno Misgeld i Steffen Leonhardt. "Assessing regional lung mechanics by combining electrical impedance tomography and forced oscillation technique". Biomedical Engineering / Biomedizinische Technik 63, nr 6 (27.11.2018): 673–81. http://dx.doi.org/10.1515/bmt-2016-0196.

Pełny tekst źródła

Streszczenie:

Abstract There is a lack of noninvasive pulmonary function tests which can assess regional information of the lungs. Electrical impedance tomography (EIT) is a radiation-free, non-invasive real-time imaging that provides regional information of ventilation volume regarding the measurement of electrical impedance distribution. Forced oscillation technique (FOT) is a pulmonary function test which is based on the measurement of respiratory mechanical impedance over a frequency range. In this article, we introduce a new measurement approach by combining FOT and EIT, named the oscillatory electrical impedance tomography (oEIT). Our oEIT measurement system consists of a valve-based FOT device, an EIT device, pressure and flow sensors, and a computer fusing the data streams. Measurements were performed on five healthy volunteers at the frequencies 3, 4, 5, 6, 7, 8, 10, 15, and 20 Hz. The measurements suggest that the combination of FOT and EIT is a promising approach. High frequency responses are visible in the derivative of the global impedance index $\Delta {Z_{{\text{eit}}}}(t,{f_{{\text{os}}}}).$ The oEIT signals consist of three main components: forced oscillation, spontaneous breathing, and heart activity. The amplitude of the oscillation component decreases with increasing frequency. The band-pass filtered oEIT signal might be a new tool in regional lung function diagnostics, since local responses to high frequency perturbation could be distinguished between different lung regions.

Style APA, Harvard, Vancouver, ISO itp.

49

Mukdjindapa, Pinyapa, Wiparat Manuyakorn, Suwat Benjaponpitak i Wasu Kamchaisatian. "Respiratory impedance measured by forced oscillation technique in young healthy preschool children". Journal of Allergy and Clinical Immunology 139, nr 2 (luty 2017): AB200. http://dx.doi.org/10.1016/j.jaci.2016.12.648.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

50

Akita, Takefumi, Toshihiro Shirai, Kazutaka Mori, Yukiko Shimoda, Takahito Suzuki, Ichiro Hayashi, Rie Noguchi i in. "Association of the forced oscillation technique with negative expiratory pressure in COPD". Respiratory Physiology & Neurobiology 220 (styczeń 2016): 62–68. http://dx.doi.org/10.1016/j.resp.2015.09.002.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Artykuły w czasopismach na temat „Forced oscillation technique”

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych