840sevice教学资料 THEORY4.PPTVIP

PNEUMATIC THEORYPatient Circuit PNEUMATIC THEORYPatient Circuit Patient Circuit (PC) is Optional Adult or pediatric Reusable Single patient use Can be vary simple for short term use or more complex for extended use for a single patient PNEUMATIC THEORYPatient Circuit The PC is defined, tested, and characterized during SST (Short Self Test) The PC can include humidification device (heat moisture exchanger, standard humidifier, or hot wire humidifier), adult or pediatric versions Additional water traps can be added PNEUMATIC THEORYPatient Circuit Inspiration Filter F8 is a HEPA type that filters down to 0.3 microns at flow rates up to 100 L/m F8 can be disposable or reusable NPB R/Flex, D/Flex filters, or equivalents may be used PNEUMATIC THEORYPatient Circuit The Patient Circuit Humidifier can be a standard humidifier, hot wire for inspiration limb, or hot wire for inspiration and exhalation limbs Heat Moisture Exchangers (HMEs) can be used PNEUMATIC THEORYPatient Circuit Circuit may be short, long, adult, pediatric, reusable, or disposable Circuit is defined, tested, and characterized during SST Results stored for use in breath delivery and ongoing tests Wye connects the inspiratory and expiratory limbs to the patient PNEUMATIC THEORYPatient Circuit Patient Circuit water traps can be added to handle additional condensation present with continuous flow NPB water traps can be opened and drained without disturbing patient ventilation PNEUMATIC THEORYPatient Circuit The exhalation filter F9 and exhalation collector vial ECV make a water trap to remove water and contaminants from the exhaled gas to protect the exhalation system Reusable and single patient use version are available PNEUMATIC THEORYPatient Circuit During SST the resistance and compliance of the patient circuit is measure and stored During normal operation these measurements are used: To compensate breath delivery for circuit effects Baseline to monitor for occlusions , leaks, or disconnects P