Mean pleural pressure remained negative during inspiration and expiration and was minus 19 cm H 2 O over the entire tidal respiratory cycle for all 10 patients. Pleural pressure became progressively more negative as the severity of asthma increased (2 cm H 2 O decrease for each 10% decrease ...
The Percussionaire ventilator was configured to provide high-frequency, low amplitude pressure fluctuations during both inspiration and expiration (Figure 1b). Also evident are two background low- frePqrueessnucryebmreeaathsus r(epmreesnsutsrealtimthiteedveant t1il7atcomr,Hc2oOn)n. ector piece ...
and to provide maximal deposition of the aerosolized medications to the patients pulmonary tract, to ensure that all the medications are delivered and are not eliminated through exhalation or weak and improper inspiration, and to provide a system for patients to increase alveolar gas exchange, ...
In general, pressures increased during expiration and decreased during inspiration. However, during expiration pressure changes showed a marked intra- and interindividual variation. The removal of the PHS resulted in a lower cranio-caudal intracoelomic pressure differential, but had no effect on the ...
We have studied the influence of several manoeuvres modifying inspiratory and expiratory flow, with and without an external obstruction, on measured single-breath diffusing capacity (DLco). By this method, we could evaluate the effects of increased inspiration or expiration time, independently of the ...
Compared with the standing (reference) position, we observed significantly higher pressures during maximal inspiration (p < 0.001) and lower pressures during maximal expiration, in the prone position and after having risen from a lying position, for both thoracic curves (p < 0.001) and ...
a function of time dependent on a value of compliance calculated from measurements of pressure and flow of provided breathing gas made during an inspiration phase, and for generating the regulatory signal dependent on a magnitude of the difference between the target pressure and the actual pressure....
(6); an air delivery conduit (8) for delivering air from the blower to the patient interface; and a controller (15) for detecting the pressure in the patient interface, the flow of air to the patient through the patient interface, and transitions between inspiration and expiration of the ...
In conditions (2) and (3), mucosal pressures were measured at the end of inspiration and expiration. Mean mucosal pressure was less than 10 cm H2O at all locations. There were no significant changes in mucosal pressure at any location between the four conditions. There was no variation ...
Natural breathing resultsshowed similar oscillatory pressure profiles between compliantand rigid airways, however the compliant airway had largerpressures on peak expiration and lower pressures on peakinspiration at the velopharynx and oropharynx regions. With theapplication of NHFT at 30 L/min, the ...