نتایج جستجو برای: respiratory drive
تعداد نتایج: 287805 فیلتر نتایج به سال:
The objective of this study was to assess ability to identify asynchronies during noninvasive ventilation (NIV) through ventilator waveforms according to experience and interface, and to ascertain the influence of breathing pattern and respiratory drive on sensitivity and prevalence of asynchronies. 35 expert and 35 nonexpert physicians evaluated 40 5-min NIV reports displaying flow-time and ai...
PURPOSE Inspiratory muscle training (IMT) is a rehabilitation therapy for stable patients with COPD. However, its therapeutic effect remains undefined due to the unclear nature of diaphragmatic mobilization during IMT. Diaphragmatic mobilization, represented by transdiaphragmatic pressure (Pdi), and neural respiratory drive, expressed as the corrected root mean square (RMS) of the diaphragmatic...
Background. The predominant effect of opioids on respiratory pattern during anaesthesia is an increase in the duration of expiration (an effect on ‘timing’), but there may also be changes in tidal volume (an effect on ‘drive’). Timing and drive are controlled by separate neuronal systems, but are infrequently considered individually. The effects of opioids on breathing are not well characterize...
Respiratory adverse events are one of the major causes of morbidity and mortality in paediatric anaesthesia. Aside from predisposing conditions associated with an increased risk of respiratory incidents in children such as concurrent infections and chronic airway irritation, there are adverse respiratory events directly attributable to the impact of anaesthesia on the respiratory system. Anaest...
Effective management of dyspnea in chronic obstructive pulmonary disease (COPD) requires a clearer understanding of its underlying mechanisms. This roundtable reviews what is currently known about the neurophysiology of dyspnea with the aim of applying this knowledge to the clinical setting. Dyspnea is not a single sensation, having multiple qualitative descriptors. Primary sources of dyspnea i...
High-frequency mechanical vibration of the ribcage reduces dyspnoea in patients with chronic obstructive pulmonary disease, and the suggestion has been made that this effect might be related to a decrease in central respiratory drive resulting from an increase in afferent inputs from intercostal muscles. In the present studies, the effects of ribcage vibration on central respiratory drive have ...
The respiratory response to bronchospasms of the same magnitude induced by inhalation of histamine or methylcholine was measured non-invasively, using bellow pneumographs, in nonsmokers and asymptomatic smokers. In each subject, tidal volume (VT), breathing frequency (f) and inspiratory time (TI) were obtained on two different days, in a randomized crossover fashion, with the following sequence...
We examined the effects of dead space loading (DSL) on ventilation (V˙E), neural respiratory drive (EMGdi%max, diaphragm EMG expressed as a % of maximal EMGdi), contractile respiratory muscle effort (Pes,tidal%P(Imax), tidal esophageal pressure swing expressed as a % of maximal inspiratory Pes) and exertional dyspnea intensity ratings in 11 healthy adults with normal spirometry. Subjects comple...
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