Neurally Adjusted Ventilatory Assist (NAVA): An Update and Summary of Experiences

被引:0
|
作者
Sinderby, C. [1 ]
Beck, J.
机构
[1] St Michaels Hosp, Li Ka Shing Knowledge Inst, Keenan Res Ctr, Toronto, ON, Canada
来源
NETHERLANDS JOURNAL OF CRITICAL CARE | 2007年 / 11卷 / 05期
关键词
D O I
暂无
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
Neurally adjusted ventilatory assist (NAVA) is a mode of mechanical ventilation delivering pressure in response to the patient's respiratory drive (measured by the electrical activity of the diaphragm, EAdi). Hence, NAVA acts as an external "respiratory muscle pump" controlled by the patient's EAdi, which in turn is influenced by respiratory feedback mechanisms. This review describes the "fundamentals" of NAVA and reports results from physiological studies on NAVA in animals and humans. The results demonstrate that NAVA maintains subject-ventilator synchrony, adapts to altered respiratory demand, and delivers tidal volumes and mean airway pressures that can be considered protective. Moreover, there is evidence suggesting that NAVA maintains synchrony even in the presence of leaks, one of the current major limitations of non-invasive positive pressure ventilation. Besides the use of the EAdi to control the respirator, monitoring the EAdi provides information about the neural respiratory drive and breathing pattern and the response of these parameters to various treatments and interventions. In summary, NAVA improves monitoring of respiratory drive, and delivers synchronized assist in relation to patient effort, and the control of assist is not affected by leaks.
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收藏
页码:243 / 252
页数:10
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