sorbitol 发表于 2025-3-26 22:46:41
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Opto-electronic Plethysmographyed than most realize. Temperature, humidity, pressure, viscosity, and density of gas influence the recording of its volume. Mouthpieces, face masks and noseclips may introduce leaks and therefore cause losses, are impractical for prolonged measurement, limit the subject’s mobility, introduce additiointrigue 发表于 2025-3-27 09:48:01
Dynamic Magnetic Resonance Imaging — A Powerful Modality in Diagnosis and Management of Patients wit rib cage and abdomen, have been observed in patients with chronic obstructive pulmonary disease (COPD) using magnetometry or respiratory inductive plethysmography. However, lack of information about diaphragm motion has impeded physiological explanations of these curious phenomena. We foundAnonymous 发表于 2025-3-27 15:14:56
Airway Geometry Determined by Acoustic Reflectionsginally used in geophysical investigations in search for oil . The first studies in humans were reported in 1970 and focussed on the geometry of the vocal tract for speech understanding. In the period from 1970 to 1990 the methods were refined by Jackson et al. and Fredberg et al. [IRATE 发表于 2025-3-27 17:48:15
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Gas Washout and Aerosol Bolus Techniques: Non-invasive Measures of Lung Structure and Ventilation He measurements of gas concentrations in the alveolar region without interfering with the mechanisms of transport. If the measurements are performed at the mouth, the gases are first inspired and convected to the lung periphery. During a breath cycle they diffuse in a space with linear dimensions thatEPT 发表于 2025-3-28 09:28:27
Oscillatory Mechanicsrmined by the mechanical properties of the respiratory system. Therefore, information on the mechanical properties of the airways and lung and chest wall tissues can be derived from the relationship between the driving pressure and the resulting flow. Airflow and volume changes are easily recorded wprogestogen 发表于 2025-3-28 11:25:23
Measurement of Respiratory System Impedancesuring its response to an externally applied forcing signal (see chapters 12 and 29). This mechanical response is studied by means of the ., defined as the complex ratio between the applied pressure (P) and the resulting volumetric flow rate (.) at the frequencies (f) contained in the forcing signal