Puritan Bennett Achieva
Puritan Bennett · Model Achieva
Offers both volume and pressure control ventilation. Flow and/or Pressure triggering for enhanced patient synchrony. Internal dial-in PEEP takes the guesswork out of setting pressure trigger sensitivity. Pressure Support to enhance weaning and improve patient comfort and patient ventilator/synchrony. Expiratory Sensitivity improves patient synchrony by allowing the clinician to adjust the percent of peak inspiratory flow that will cycle the ventilator from inspiration to expiration in Pressure Support. Exceptional battery life for extended mobility. Internal O2 blending for accurate delivery of 21% to 100% oxygen. (PSO2 model). Flow Acceleration Limit. Internal memory and modem allow access to stored data, providing a tool to troubleshoot alarms and evaluate effectiveness of patient settings. Can be used with pediatric patients as small as 5 kg.
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
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Fails the pre-use / extended self-test
HighSymptoms: Self-test aborts with a diagnostic code, circuit-leak or compliance test fails, ventilator not released for use.
Root cause: Patient-circuit leak, an exhalation-valve / flow-sensor fault, or an internal pneumatic / electronic fault (see the diagnostic-code table).
Oxygen / air delivery or blender fault
HighSymptoms: FiO2 not matching the setting, low or high supply-pressure alarm, gas-mix alarm.
Root cause: Blender fault, a wall-supply / hose issue, or a failing internal compressor / turbine.
Flow / pressure sensor drift
MediumSymptoms: Monitored tidal volume, pressure or flow implausible, frequent nuisance alarms.
Root cause: Flow sensor(s) or the internal pressure transducers aging or contaminated.
Exhalation-valve fault
MediumSymptoms: PEEP not held, auto-PEEP, high circuit pressure, exhalation-valve alarm.
Root cause: Worn or wet exhalation-valve diaphragm / assembly.
Battery / power fault
MediumSymptoms: Short battery run time, will not ride through a power interruption, will not charge.
Root cause: Aged internal / external battery.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Flow sensor(s)
Class Frequent wear itemRel. cost $$R&R Fairly easy
Exhalation valve assembly
Class Frequent wear itemRel. cost $$R&R Fairly easy
O2 sensor (galvanic cell)
Class Frequent wear itemRel. cost $$R&R Fairly easy
Internal compressor / turbine
Class Major service partRel. cost $$$$R&R Expert-level
Battery pack
Class Periodic replacementRel. cost $$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Flow sensor(s) | Frequent wear item | $$ | Fairly easy |
| Exhalation valve assembly | Frequent wear item | $$ | Fairly easy |
| O2 sensor (galvanic cell) | Frequent wear item | $$ | Fairly easy |
| Internal compressor / turbine | Major service part | $$$$ | Expert-level |
| Battery pack | Periodic replacement | $$ | Fairly 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 starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Self-test / circuit test fails
- Run the extended self-test (EST) with the exact circuit that will be used, and note the diagnostic code.
- Look the code up in the service manual's diagnostic-code table and follow the sequenced repair actions.
- Leak-test the patient circuit, humidifier and water traps.
- Fit a fresh flow sensor and exhalation valve and repeat.
- Verify secure connections of all cables and modules; replace CPU / main boards only after all other remedies.
Symptom: FiO2 or supply-pressure fault
- Confirm the O2 (and air) supply pressures and hoses.
- Verify FiO2 with a calibrated analyser at the wye.
- Calibrate the O2 sensor / blender per the service manual.
- Listen for the internal compressor / turbine cycling correctly on air-supply loss.
- Refer the blender / compressor for service if the mix is still wrong.
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
Related calculators
From BioLab, for work done with this kind of equipment.
Troubleshoot this device with Bio
Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
Ask Bio