840sevice教学资料 THEORY5.PPTVIP

PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module PNEUMATIC THEORY BDU Exhalation Module The Exhalation Module filters, heats, measures, and controls exhalation flow Monitors and controls pressure in the patient circuit using an active exhalation valve Filters and heats gases to prevent damage Designed to work with hot wire humidifiers The Sample Port allows the 7250 monitor to sample exhaled gas (a future option) The patient circuit pressure is monitored before the check valve Circuit pressure passes through SOL2 and on to the transducer PE SP The Exhalation Check Valve (CV5) prevents drawing room air in through the Exhalation Module The Heater (HTR) heats the gas to prevent condensation in the Exhalation Module The heater temperature is controlled, monitored, and tested CV5 HTR The Exhalation Flow Sensor (Q3) is a hot film anemometer that is the same as Q1 and Q2, but larger Q3 measures the exhalation flow for use in spirometry and flow sensitivity Q3 The Exhalation Valve (EV) is electronically operated and monitored EV controls pressure in the exhalation system (and PC) by venting the excess EV is current controlled by the BDU CPU EV can be open, throttling, or closed by controlling current EV Motor Poppet Seat Current determines the amount of torque applied to the poppet to close EV The more torque, the greater the closing force and higher pressure EV can hold in the Exhalation Module (and patient circuit) Removing current opens EV (exhalation) Supplying