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Developedby:
RubenDRestrepo,MD,RRT
VijayMDeshpande,MS,RRT,FAARC
AssistantProfessors
GeorgiaStateUniversity
Atlanta,Georgia
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MechanicalVentilation
Graphics
SCALARS
LOOPS
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SCALARS
Flow/Time
Pressure/Time
Volume/Time
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Pressure-Volume
Flow-Volume
LOOPS
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SpontaneousBreath
Time(sec)
Flow(L/min)
Inspiration
Expiration
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MechanicalBreath
Inspiration
Expiration
Flow(L/min)
Time(sec)
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TypicalFlowPatterns
ACCELERATING
DECELERATING
SINE
SQUARE
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InspiratoryFlowPattern
Inspiration
Expiration
Time(sec)
Flow(L/min)
Beginningofinspiration
exhalationvalvecloses
Peakinspiratoryflowrate
PIFR
Beginningofexpiration
exhalationvalveopens
Totalcycletime
TCT
TI
ExpiratoryTime
TE
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ExpiratoryFlowPattern
Inspiration
Expiration
Time(sec)
Flow(L/min)
Beginningofexpiration
exhalationvalveopens
PeakExpiratoryFlowRate
PEFR
Durationof
expiratoryflow
Expiratorytime
TE