The method may comprise directing the exhaust gases through a venturi and sensing a differential exhaust pressure across the venturi.
该方法可包括引导排气通过文丘里管，以及检测文丘里管上的排气差压。
The sensing device may comprise a pressure sensor, among other things.
该感测装置可包括压力传感器等。
The sensor may comprise a thoracic fluid sensor, a heart sounds sensor, a cardiac chamber or arterial pressure sensor, a respiration sensor, or a blood chemistry sensor, for example.
传感器例如可以包括胸液传感器、心音传感器、心腔压或动脉压传感器、呼吸传感器或血液化学传感器。
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