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Assessing effort and work of breathing
Current Opinion in Critical Care, 2014Spontaneous breathing has been shown to induce both positive and negative effects on the function and on injury of lungs and diaphragm during critical illness; thus, monitoring of the breathing effort generated by the patient might be valuable for a better understanding of the mechanisms of disease and to set properly ventilation.
BELLANI, GIACOMO, PESENTI, ANTONIO MARIA
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Muscle kinematics for minimal work of breathing
Journal of Applied Physiology, 1999A mathematical model was analyzed to obtain a quantitative and testable representation of the long-standing hypothesis that the respiratory muscles drive the chest wall along the trajectory for which the work of breathing is minimal. The respiratory system was modeled as a linear elastic system that can be expanded either by pressure applied at the ...
WILSON T +3 more
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Prediction of post-extubation work of breathing
Critical Care Medicine, 2000To evaluate which mode of preextubation ventilatory support most closely approximates the work of breathing performed by spontaneously breathing patients after extubation.Prospective observational design.Medical, surgical, and coronary intensive care units in a university hospital.A total of 22 intubated subjects were recruited when weaned and ready ...
S, Mehta +4 more
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Bedside assessment of the work of breathing
Critical Care Medicine, 1988The oxygen consumption (VO2) of healthy volunteers and patients recovering from respiratory failure in the ICU was measured by indirect calorimetry during complete mechanical (VO2vent) and spontaneous (VO2wean) ventilation. The work of breathing was calculated as the difference in VO2 between spontaneous and mechanical ventilation and expressed as a ...
W D, Lewis +6 more
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External Work of Breathing of Demand-Air Underwater Breathing Apparatus
OCEANS '78, 1978Underwater breathing apparatus can be effectively evaluated by measuring the external work of breathing. This paper reviews the existing and the proposed standards for demand-air breathing apparatus and recommends improvements to the Bentley-Reimers criterion.
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Nasal Prongs and Work of Breathing
Pediatrics, 1980The subject of the article by Goldman et al1 is without doubt a highly interesting one to which our attention had been drawn a few years ago. We became aware of the fact that, although most of our neonates treated with continous positive airway pressure (CPAP) did well, some seemed to become exhausted very quickly by the apparently increased work of ...
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Maximal work of one breathing cycle
Journal of Applied Physiology, 1960The method used enables one to record directly the pressure-volume diagram of a subject while breathing against a high resistance. The average work accomplished during expiration was 69% and, during inspiration, 79% of that which was predicted from the pressures developed against a column of mercury at different lung volumes.
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Work of Breathing and Abnormal Mechanics
Surgical Clinics of North America, 1974In most forms of respiratory failure the individual increases his respiratory effort—work—to try to compensate for the abnormal blood-gas levels. The amount of work required to compensate for the low P a o 2 and/or high P a co 2 controls whether the patient will be able to prevent a dangerous fall in P a o 2 and how long he can maintain ...
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Work of Breathing Limits for Heliox Breathing
2010Abstract : The purpose of the present report was to determine physiologically acceptable limits for work of breathing with heliox mixtures. The basis for the development was the limits for air breathing that Navy Experimental Diving Unit (NEDU) implemented in 2008.
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