In CPAP mode, the O-Two e700 ventilator delivers a constant flow of air to maintain positive airway pressure throughout the entire breathing cycle. This is essential for patients who are breathing spontaneously but require assistance in maintaining open airways.
How CPAP Mode Works:
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The ventilator uses a control valve to regulate and maintain the set CPAP level.
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A continuous flow is provided to ensure a stable pressure environment in the airway.
Two Breathing Options in CPAP Mode:
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PSV = 0 (Dash Displayed) – Flow-Regulated CPAP
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This is a passive support mode.
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The ventilator automatically adjusts the flow to maintain an average airway pressure close to the set CPAP value.
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Appears as a dash when pressure support is set to zero (also seen in SIMV).
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PSV Set to Value – Active Pressure Support
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When Pressure Support Ventilation (PSV) is set, the ventilator delivers the preset PSV pressure during inspiration (starting from the trigger point) until the exhalation phase begins.
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Helps patients with weak spontaneous effort by boosting inspiratory flow.
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Apnea Backup Function
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Safety Feature: If the patient stops breathing and does not trigger spontaneous breaths within the apnea period (T apnea) set by the user:
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The ventilator automatically switches to Assist Control Ventilation (ACV).
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This ensures continuous support in case of patient apnea.
🛠️ Default Trigger in CPAP Mode:
Pressure trigger, typically set at 2 cm H₂O.
Settings Available in CPAP Mode:
Below the CPAP display, the following parameters can be configured:
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CPAP: Sets the baseline airway pressure.
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PSV: Defines the pressure delivered during inspiratory support.
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Trig: Adjusts sensitivity to patient’s inspiratory effort.
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Termination: Ends the inspiratory phase when a condition is met.
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FiO₂ (%): Sets oxygen concentration.
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MV Max/Min: Maximum and minimum minute volume alarms.
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P Max/Min: Pressure limits to ensure safe ventilation.
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P Apnea: Time setting that determines when backup mode is activated due to apnea.
Backup Settings in CPAP Mode:
In preparation for possible apnea and automatic switch to ACV, the following parameters can be pre-set:
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Rate (breaths per minute)
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VT (Tidal Volume)
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I:E Ratio
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MV (Minute Volume)
If not pre-set, the ventilator will use default values based on the selected patient size.