Puritan Bennett Aequitron LP-10
Puritan Bennett · Model Aequitron LP-10
Pressure control knob for pressure-limited, time-cycled ventilation. Decreased internal resistance reduces breathing effort in SIMV mode. Features and portability provide flexibility to meet a broad range of ventilation and patient requirements. Internal and external battery operation provides convenience and security.
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 / venturi fault or a low-flow O2 source issue.
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 $$R&R Fairly easy
Inlet filter / muffler
Class Frequent wear itemRel. cost $R&R Easy
Battery pack
Class Periodic replacementRel. cost $$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 | $$ | Fairly easy |
| Inlet filter / muffler | Frequent wear item | $ | Easy |
| Battery pack | Periodic replacement | $$ | 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.
Technical Specs
- Weight
- 15.9 kg
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.
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