感觉两者并不对等？谢谢

NAVA 

Measured with a dedicated nasogastric feeding tube, EAdi reflects the intensity of the electrical field produced by the diaphragm contraction and is the closest available signal to the respiratory centers’ output. EAdi is the most precise surrogate of neural respiratory drive provided that neuromuscular transmission and muscle fibre membrane excitability are intact, and the diaphragm is used as the main inspiratory muscle (i.e., no significant difference across different accessory muscles) [3, 23, 24]. EAdi mainly reflects crural diaphragm activity, but is representative of activity from the costal parts of the diaphragm. EAdi correlates well to transdiaphragmatic pressure [25, 26] and the signal remains reliable at different lung volumes [27]. Ventilator algorithms continuously correct for interference from cardiac activity and motion artefacts due to cardiac contractions and esophageal peristalsis.

NAVA

用专用的鼻胃管测量EAdi，其反映了膈肌收缩产生的电场强度，也是最接近呼吸中枢输出的可用信号。EAdi是神经呼吸驱动最精确的替代物，但前提是神经肌肉传递和肌纤维膜兴奋性完好无损，并且膈肌作为主要吸气肌（即不同的辅助肌肉之间没有显著差异）。EAdi主要反映膈脚活动，但代表了膈肋部的活动。EAdi与跨膈压有很好的相关性，并且该信号在不同肺容积时仍然可靠。呼吸机有其特定的算法能持续校正因心脏收缩和食道蠕动造成的心脏活动和运动伪影的干扰。

 the diaphragm is used as the main inspiratory muscle (i.e., no significant difference across different accessory muscles) 

膈肌作为主要吸气肌（即不同的辅助肌肉之间没有显著差异）-------感觉两者并不对等？