Results 271 to 280 of about 2,821,597 (296)

Inspiratory Muscle Unloading by Neurally Adjusted Ventilatory Assist During Maximal Inspiratory Efforts in Healthy Subjects

Chest, 2007
Neurally adjusted ventilatory assist (NAVA) is a mode of mechanical ventilation in which the ventilator is controlled by the electrical activity of the diaphragm (EAdi). During maximal inspirations, the pressure delivered can theoretically reach extreme levels that may cause harm to the lungs.
Sinderby C, Beck J, Spahija J, de Marchie M, Lacroix J, Navalesi P, Slutsky AS   +6 more
openaire   +3 more sources

Inspiratory effort and occlusion pressure in triggered mechanical ventilation

Intensive Care Medicine, 1988
We have studied eleven patients ventilated in the assisted mode during recovery from acute respiratory failure. We have measured the effort required to trigger the pressure demand valve for 3 different ventilators, and have measured the occlusion pressure as an index of neuromuscular inspiratory drive.
R, Fernández, S, Benito, J, Sanchis, J, Milic-Emili, A, Net   +4 more
openaire   +2 more sources

Effect of thoracoabdominal breathing patterns on inspiratory effort sensation

Journal of Applied Physiology, 1987
The respiratory sensations evoked by added inspiratory loads are currently thought to be largely mediated by the activity of the inspiratory muscles. Because of the differences in proprioceptors and in afferent and efferent innervations among the inspiratory muscles, we hypothesized that the sensation evoked by a given load would be different when the
J W, Fitting, D A, Chartrand, T D, Bradley, K J, Killian, A, Grassino   +4 more
openaire   +2 more sources

Maximal activation of the human diaphragm but not inspiratory intercostal muscles during static inspiratory efforts

Neuroscience Letters, 1988
It is widely held that transdiaphragmatic pressure is a reliable index of the extent of central activation of the diaphragm but the maximal voluntary transdiaphragmatic pressure is lower during inspiratory than expulsive efforts. To determine whether the diaphragm is fully activated during the two manoeuvres supramaximal stimuli were delivered to both ...
D K, McKenzie, B L, Plassman, S C, Gandevia   +2 more
openaire   +2 more sources

Flow-triggering reduces inspiratory effort during weaning from mechanical ventilation

Intensive Care Medicine, 1995
To investigate whether a new flow-triggered (FT) system can reduce the patient's inspiratory effort compared to a traditional pressure-triggered (PT) system during weaning from mechanical ventilation.Prospective study.Intensive care unit of a General Hospital.10 mechanically ventilated patients, without chronic airway disease, ready to wean.Minute ...
G, Polese, A, Massara, R, Poggi, R, Brandolese, G, Brandi, A, Rossi   +5 more
openaire   +2 more sources

Effort sensation, chemoresponsiveness, and breathing pattern during inspiratory resistive loading

Journal of Applied Physiology, 1992
Although inspiratory resistive loading (IRL) reduces the ventilatory response to CO2 (VE/PCO2) and increases the sensation of inspiratory effort (IES), there are few data about the converse situation: whether CO2 responsiveness influences sustained load compensation and whether awareness of respiratory effort modifies this behavior.
J E, Clague, J, Carter, M G, Pearson, P M, Calverley   +3 more
openaire   +2 more sources

Breathing Hydrogen-Oxygen Mixture Decreases Inspiratory Effort in Patients with Tracheal Stenosis

Respiration, 2018
Background: Hydrogen-oxygen mixture (H2-O2) may reduce airway resistance in patients with acute severe tracheal stenosis, yet data supporting the clinical use of H2-O2 are insufficient.
Ziqing Zhou, C. Zhong, Z. Su, Xiao-ying Li, Yu Chen, Xiao-bo Chen, C. Tang, Lu-Qian Zhou, Shi-Yue Li   +8 more
semanticscholar   +1 more source

Pulse Transit Time as a Measure of Inspiratory Effort in Children

Chest, 2003
The current criterion standard for measuring inspiratory effort, esophageal manometry, is an invasive procedure that young patients find intolerable. Inspiratory effort can also be assessed noninvasively by measuring the pulse transit time (PTT). PTT is the time the pulse wave (PW) takes to travel between two arterial sites (normally heart to finger ...
PAGANI J, VILLA, MARIA PIA, CALCAGNINI G, ALTERIO A, AMBROSIO R, CENSI F, RONCHETTI R.   +6 more
openaire   +3 more sources

[Dyspnea and inspiratory effort capacity in COPD].

Revue des maladies respiratoires, 1994
The aim of this work was to study the relationship between dynamic hyperinflation and dyspnoea perception on exercise in patients with chronic obstructive pulmonary disease (COPD). Seven men and three women with COPD (mean FEV1 45.9 +/- 9.8% predicted) were studied.
A, Noseda, J P, Carpiaux, J, Schmerber, J C, Yernault   +3 more
openaire   +1 more source

Effect of inspiratory muscle fatigue on perception of effort during loaded breathing

Journal of Applied Physiology, 1987
The present study examined the relationship between the intensity of the sense of effort during inspiratory threshold loading and the severity of inspiratory muscle fatigue. Studies were performed on normal subjects in whom the magnitude of airway pressure developed (Pm) and the duty cycle of breathing (TI/TT) were constrained to achieve a pressure ...
G S, Supinski, S J, Clary, H, Bark, S G, Kelsen   +3 more
openaire   +2 more sources