Ventilation Modes web - bcrt.ca

New Modes of VentilationDr. Zia HashimModezDescribes the specific combination of: control phase conditional variables zDefined for spontaneous mandatory breaths VariablezControl variable: Constant throughout inspiration, regardless of changes in respiratory impedancezTrigger variable: For initiating a breath. zLimit variable: Constant throughout inspiration butdoes not result in the termination of inspiratory time zCycle variable: Causes inspiration to endzConditional variable: results in a change in outputWhat controls the adjustments?Volume?(flow control)Pressure?TargetingControlzFlowzP ressureTargetzTimezPressurezVolumeVolume controlTargetingControlzFlowzPressureTar getzTimezPressurezVolumeTime-cycledpress urecontrolTargetingControlzFlowzPressure TargetzTimezPressurezVolumeVolumetargete dpressurecontrolPressure 3500 cm H20 Microprocessor Control Inhalationvalve(resistor)solenoidMicropr ocessorexhale valveTidal volume 500 mlPressure 35 cm H20 Goals of Mechanical VentilationzAvoiding extension of lung injury,z O2toxicity zRecruiting alveoli by mean Paw by PEEP and/or prolonging inspiration,z Peak PawzPreventing atelectasiszUsing sedation and paralysis judiciouslyzBetter Patient-Ventilator synchronyVILI & Lung ProtectionzVolutraumazAtelectrauma: Even the best possible lung protective strategy may cause injury to some of lung units (due to heterog)

Mode zDescribes the specific combination of: ¾control ¾phase ¾conditional variables zDefined for ¾spontaneous ¾mandatory breaths

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