Malcolm R. Williams,Adrian D. Desilva,Huy Thanh Vu
申请号：
US13931418
公开号：
US09433743B2
申请日:
2013.06.28
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.
