Draeger Evita 4
Dräger · Model Evita 4
• One ventilator for every patient population - Neonatal, pediatric, adult – Evita 4 can be used to ventilate any patient category, reducing the amount of staff training required and ensuring greater resource flexibility. • Intuitive user interface - Configurable trends, loops, measured values, curves and logbook are displayed on the full-color screen for a complete customized overview of the ventilation therapy. The user-friendly display shows only the active control elements to ensure immediate recognition of the required settings. The robust touch screen combines highly flexible operation with direct access to rotary knobs and keys. • Excellent weaning performance - PCV+/ BIPAPTM*, the universal mode for ventilation and weaning, gives a patient the freedom to breathe spontaneously at any time, reducing the need for sedation and invasiveness of ventilation to optimize the patient’s ability to wean off the ventilator. Automatic Tube Compensation (ATC™) gives a patient the feeling of virtual extubation by eliminating the work involved in breathing through an endotracheal tube, improving the weaning process. • Conventional and mask ventilation - Mask ventilation can complement the weaning process by reducing the reintubation rate or even preventing intubation in the first place. The fact that Evita 4 offers the alternative of mask ventilation (NIV) means you only need one device for conventional and non-invasive ventilation. • Upgradeability - Evita 4 is based on a concept of innovative continuity. The device’s modular design ensures upgradeability and upward compatibility while the user interface and sensors, for example, are based on the continuity principle to guarantee a high degree of familiarity. • A record of innovation - The Evita 4 story has been marked by a series of advances in ventilation therapy, ATC was introduced in 1997 to achieve virtual extubation, NeoFlow in 1998 for neonatal ventilation, and NIV in 2001 to make mask and conventional ventilation possible from a single device. • Safe investment - Even the first Evita 4 machines can be upgraded to include all the features of the latest models – clear evidence that Evita 4 is a good investment. • Basic research - Dräger Medical still invests a significant proportion of its human and financial resources in basic research – because we know this is a vital prerequisite for innovation and will continue to be so in the future.
Key tips
- ·Never disable a low-pressure/circuit-disconnect alarm while troubleshooting - silence it, don't disable it.
- ·Verify the O2 supply source and pressure before assuming an internal fault.
- ·Circuit type must match the patient population (adult/pediatric/neonatal) - a mismatched circuit invalidates delivered volumes.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Compressor / turbine failure
HighSymptoms: Unable to reach set pressure, low-flow alarm, loud noise.
Root cause: Worn bearings or failed blower motor.
Power supply / battery failure
HighSymptoms: Unexpected shutdown, persistent low-battery alarm.
Root cause: Aged internal battery or failed PSU.
Patient circuit leak
LowSymptoms: Leak alarm, low circuit pressure, volume loss.
Root cause: Disconnected or punctured patient circuit / humidifier.
O2 blender / mixer fault
MediumSymptoms: FiO2 out of range, oxygen alarm.
Root cause: Failed solenoid or proportional valve in blender.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
O2 sensor (galvanic/paramagnetic)
Class Frequent wear itemRel. cost $$R&R Fairly easy
Exhalation valve assembly
Most-replaced wearable part; stock spares.
Class Frequent wear itemRel. cost $$R&R Fairly easy
Flow / differential pressure sensor
Class Periodic replacementRel. cost $$$R&R Moderate
Bacterial / HEPA filter
Consumable, replace per PM schedule.
Class ConsumableRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| O2 sensor (galvanic/paramagnetic) | Frequent wear item | $$ | Fairly easy |
| Exhalation valve assembly Most-replaced wearable part; stock spares. | Frequent wear item | $$ | Fairly easy |
| Flow / differential pressure sensor | Periodic replacement | $$$ | Moderate |
| Bacterial / HEPA filter Consumable, replace per PM schedule. | Consumable | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily pre-use check: self-test, circuit integrity, alarm function
- ·Scheduled circuit and inspiratory filter replacement per manufacturer interval
- ·Flow and pressure sensor calibration verification
- ·Battery load test and runtime check
- ·Annual full PM and electrical safety test
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Exhalation valve leak / failure
- Confirm the presentation - typically low exhaled tidal volume, high leak alarm, inability to maintain PEEP - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: diaphragm/valve degraded by secretions and cleaning cycles.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the exhalation valve assembly per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Flow / pressure sensor drift
- Confirm the presentation - typically inaccurate delivered volume, false volume/pressure alarms - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: sensor contamination or aging of differential-pressure transducer.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the flow / differential pressure sensor per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- ICU / CCU
- Emergency Department
- Operating Room (anesthesia-adjacent)
- NICU
- Respiratory Therapy department
- Patient transport
Documents & Manuals
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