Transcription of VENTILATOR WAVEFORM ANALYSIS
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VENTILATOR WAVEFORM ANALYSIS
VENTILATOR WAVEFORM ANALYSISANALYSISByDr M V Nagarjuna1Dr. M. V. NagarjunaSeminar Terminology ( Types of variables, Breaths, modes of ,,ventilation) VENTILATOR waveforms (Scalars)() altered physiological Patient Asynchrony and its (Pressure volume and Flow volume)2 Basics phase variablesBasics phase Trigger ..What causes the breath to begin?BCB. Limit ..What regulates gas flow during the breath? ..What causes the breath to end?VARIABLESVARIABLES1 TRIGGER VARIABLE : Initiates the VARIABLE : Initiates the breath Flow (Assist breath) Pressure (Assist Breath) Pressure (Assist Breath) Time (Control Breath) Newer variables (Volume Shape signal neural)Newer variables (Volume, Shape signal, neural)Flow trigger better than Pressure trigger. ow t gge ette t a essu e t gge . With the newer ventilators, difference in work of triggering is of minimal clinical significance.
Decelerating flow waveform Advantages : Decreases Peak inspiratory pressures Increases oxygenation, decreases A-aDo2 Improves patient ventilator synchrony (more physiological) Disadvantages : Decreases expiratory time , potential for auto PEEP Increases mean airway pressure, decreases cardiac output Increased intracranial …
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