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Ventilator graphics
The document discusses the importance of analyzing ventilator graphics to assess patient ventilation and detect problems. It describes common waveform types including scalars, loops, and graphs of pressure, flow, tidal volume. Normal and abnormal waveforms are shown, such as those indicating decreased compliance, increased resistance, leaks, or overdistension. Different breath types, including mandatory, assisted and spontaneous breathing are also outlined. Overall ventilator graphics provide a critical tool for managing mechanically ventilated patients.
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Ventilator graphics
- 1. Ventilator Graphics FAY A LB U A I N A I N
- 2. Objectives: • Introduction • WhyWe Need To Know About The Ventilator Graphics ? • Types Of Waveforms • Types Of Breath • Normal And Abnormal Waveforms
- 3. Introduction: Monitoring and analysisof graphic display of curves and loops during mechanical ventilation has become critical to determine how patient is being ventilated to assess problems occurring during ventilation.
- 4. Mode function Auto PEEP Synchrony TriggerWOB Over distension PEEP Ti Leak Flow cycle Time rise Active exhalation Whywe need to know about the ventilator graphics ?
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- 7. Types Of Waveforms: VC-CMV SIMV+VC PC-CMVVAP APRV SIMV+PC PSV • Constant • Sinusoidal • Ascending • Descending • Exponential • Ascending • Sinusoidal • Constant • Exponential • Constant • Sinusoidal • Ascending • Descending • Exponential • Ascending • Sinusoidal • Constant • Exponential VC PC ?
- 8. Type Of Breath: MandatoryAssisted Spontaneous Inspiration Expiration
- 9. P-T PIP Transairway Pressure (PTA) Pplateau PEEP BeginInspiration Begin Expiration B C A= airway Raw B= Alveolar distending pressure ABC = MAP
- 10. Respiratory Mechanics: ↑ RAW↓ COMPLIANCE A B A B
- 11. Time rise: Minimal PressureOvershoot P What is the benefit of the time rise ?
- 12. Inspiration Expiration Time (sec) TI TE F-T Beginningof inspiration exhalation valve closes Peak inspiratory flow rate PIFR End inspiration and beginning of expiration exhalation valve opens Peak expiratory flow rate PEFR
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- 22. P-V LOOP PIP VT What does thatpoint indicates ?
- 23. Type Of Breath: ControlledAssisted Spontaneous I E E E I IPEEP
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- 25. WOB The more verticalthe loop lays, the higher the lung compliance, the more horizontal it lays, the lower the lung compliance. Thus slope of the line equals compliance. The fatter the loop, the higher the airway resistance…you can tell if it’s I or E resistance by looking at whether the right or left side bulges out more
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- 41. Assessment of pressure,flow and volume waveforms is a critical tool in the management of the mechanically ventilated patient.
- 42. References: • Pilbeam’s MechanicalVentilation, 5th edition. • Curves and Loops in Mechanical Ventilation, dragger booklet. • Handbook of Mechanical Ventilation, Kumar B Umesh, 2011. • Maquet pocket guide, • Ventilator Graphics and Respiratory Mechanics in the Patient With Obstructive Lung Disease, 2005.