Drager Fabius

Asset Type

Anesthesia Machine

Manufacturer

Drager

Model

Fabius

Manual Reference

Fabius Anesthesia System Technical Service Manual, Part Number 4116029, Rev. C, dated 11 December 2000.

Manufacturer Recommendation / AEM Status

North American Drager recommends the Fabius be serviced at six month intervals. The manual also states that after any repair, replacement, calibration, or adjustment, operation of the unit must be verified and accompanied by a Test Certificate.

Manufacturer-listed PM / service items include:

• Complete Test Certificate inspection
• General unit inspection and labeling check
• Breathing system / circle system checks
• Control box function checks
• Gas connection checks
• Cylinder pressure reducer and cylinder checks, if equipped
• Lack of O2 alarm check
• Pressure regulator check
• O2 flush valve check
• Ejector outlet check
• Secretion aspirator check, if equipped
• AGS system check
• Vapor plug-in system housing section check
• Safety valve / flowmeter unit check
• Leak tests
• Low pressure leak test
• Circle system leak test
• Flowmeter unit checks
• Control valve checks
• S-ORC checks
• Ventilation mode functional testing
• Safety tests
• Final assembly ready-for-operation check

Manufacturer-listed frequencies / replacement intervals found in the manual:

• Service interval: 6 months
• Static cylinder test: every 6 months
• 9 V rechargeable battery: every 3 years, if fitted
• 24 V rechargeable batteries: every 3 years
• Pressure regulators: replace after 6 years of service or install pressure regulator spare parts set
• Wearing parts replacement schedule: includes annual, 2-year, 3-year, 4-year, and 6-year PMS kits listed in the Test Certificate section
• Soda lime: replace when two-thirds of the soda lime in a canister is discolored

AEM note: If a facility performs this PM at a different interval or changes the listed activities, that should be handled under the facility’s approved AEM program, risk assessment, maintenance history, and applicable regulatory requirements.

What This PM Procedure Covers

• Scheduled six-month service inspection
• Manufacturer Test Certificate-based functional checks
• Breathing system and gas system inspection
• Leak and low-pressure leak testing
• Ventilation mode verification
• Electrical safety testing documentation
• Wear item / battery / pressure regulator interval review

Required Tools and Equipment

Use the manual-supported tools and facility-approved equivalents as applicable:

• Electrical safety analyzer capable of protective conductor resistance and leakage testing
• Pressure gauges, including low-pressure and bar-range gauges as applicable
• Digital barometer
• Flowmeter / flowmeter unit
• Test adapter
• Portable test set
• Stopwatch
• Test pressure reducer
• Gas supply sources for O2, AIR, and N2O where applicable
• Breathing circuit / test lung or training thorax
• Leak test equipment or facility-approved leak test method
• Manufacturer Test Certificate or facility PM checklist based on the Test Certificate

Step-by-Step PM Procedure

1. Confirm Device Identity and Configuration

Action: Confirm the asset tag, serial number, model, gas configuration, breathing system type, vaporizer setup, cylinder setup, and installed options.

Expected outcome: The PM is being performed on the correct Fabius configuration.

Why it matters: The Fabius may be configured with compact breathing system, circle absorption system, optional UPS, cylinder options, AIR, and other accessories.

2. Review Manufacturer Service Interval

Action: Confirm the PM is being performed against the manufacturer-listed six-month service interval or the facility’s approved AEM interval.

Expected outcome: PM interval is documented clearly.

3. Visual and Mechanical Inspection

Action: Inspect the anesthesia machine, trolley, casters, labels, power cord, plugs, hoses, gas connections, fittings, control box, display, knobs, flowmeters, vaporizer mounting area, breathing system, absorber, valves, AGS connections, and accessories.

Expected outcome: No missing, damaged, loose, illegible, cracked, contaminated, or unsafe components are found.

4. Check Wear Item / Replacement Interval Status

Action: Review the manufacturer-listed replacement schedule and document whether listed items are due.

Check at minimum:

• 9 V rechargeable battery, if fitted
• 24 V rechargeable batteries
• Pressure regulators / pressure regulator spare parts set
• Breathing system seals, valve discs, diaphragms, filters, and PMS kit items as applicable
• Soda lime condition

Expected outcome: Due items are replaced or documented for follow-up.

5. Breathing System Inspection

Action: Inspect the compact breathing system or circle absorption system. Check inspiratory valve, expiratory valve, APL valve, absorber, fresh gas decoupling valve, breathing bag connection, flow sensor area, hoses, O-rings, seals, and patient connections.

Expected outcome: Components are installed correctly, move freely where applicable, seal properly, and show no obvious damage or contamination.

6. Gas Supply and Cylinder Checks

Action: Verify pipeline gas connections, cylinder connections if equipped, pressure gauges, cylinder pressure reducers, non-return function where applicable, and gas-specific connections.

Expected outcome: Gas supplies connect correctly, pressures are appropriate, and no leaks or cross-connection concerns are identified.

7. Lack of O2 Alarm Check

Action: Perform the manufacturer Test Certificate O2 supply failure / lack of O2 alarm check.

Expected outcome: O2 failure alarm activates as expected.

8. Pressure Regulator Checks

Action: Check pressure regulators according to the Test Certificate. If adjustment is required, use the manual-supported regulator values:

• O2 pressure regulator: 3.0 bar ±0.2 bar
• N2O pressure regulator: 2.0 bar ±0.2 bar
• AIR pressure regulator: 1.5 bar ±0.2 bar

Expected outcome: Pressure regulator output values are within manufacturer-listed ranges.

9. O2 Flush Valve Check

Action: Activate and verify O2 flush operation per the Test Certificate.

Expected outcome: O2 flush operates correctly and returns normally when released.

10. Leak Testing

Action: Perform manufacturer-listed leak tests, including:

• General leak test
• Low pressure leak test
• Circle system leak test / breathing system leak test

Expected outcome: Leak test results meet the manufacturer Test Certificate criteria.

11. Flowmeter and Control Valve Checks

Action: Verify flowmeter movement, readability, gas flow control valves, S-ORC behavior, and related fresh gas controls per Test Certificate.

Expected outcome: Flow controls operate smoothly and readings are within expected limits.

12. Control Box Function Check

Action: Verify power-up, display, keypad, control knob, alarms, standby, manual/spontaneous mode, IPPV mode, settings, and user controls.

Expected outcome: Controls respond correctly and no unresolved error condition remains.

13. Sensor and Calibration Checks

Action: Check O2 sensor, flow sensor, and pressure sensor function/calibration status according to the Test Certificate and facility procedure.

Expected outcome: Sensors pass functional checks and calibration checks.

14. Ventilation Functional Test

Action: Perform the manufacturer-listed functional test of ventilation mode. Confirm ventilation operation using appropriate test lung/training thorax and test settings.

Expected outcome: Ventilation operates normally and measured/observed values meet Test Certificate expectations.

15. AGS / Scavenging Check

Action: Inspect and verify anesthetic gas scavenging system connections and function per Test Certificate.

Expected outcome: AGS connections are secure and function is acceptable.

16. Final Ready-for-Use Check

Action: Reassemble the unit and all accessories ready for operation. Confirm no tools, test adapters, caps, or temporary test setups remain attached.

Expected outcome: Unit is complete, clean, functional, and ready for clinical use if all checks pass.

Electrical Safety Testing

The manual’s Test Certificate lists safety tests that include:

• Power cord check
• Protective conductor test per VDE 751
• Equivalent unit leakage current test

Document measured values.

Protective conductor / ground resistance:

Ground resistance measured in ohms, expected ≤ 0.5 Ω or facility/NFPA 99 criteria if different.

Manufacturer Test Certificate objective: R < 0.2 Ω.

Protective conductor resistance measured in ohms:

Result =

Pass / Fail =

Equivalent unit leakage current:

Manufacturer Test Certificate limit: Ileak ≤ 750 µA.

Manual note: Subsequent measurements may exceed the first-measured value by max 50%, but must still be ≤ 750 µA.

Touch/chassis leakage measured in microamps:

Facility limit used =

First-measured value, if known =

Result =

Pass / Fail =

Do not substitute a generic leakage limit if the facility uses a specific anesthesia machine safety testing policy. Document the facility limit used if different.

Pass / Fail Criteria

PM Pass Criteria

Pass the PM only if:

• Manufacturer Test Certificate checks pass
• No unresolved alarm, fault, leak, or abnormal function remains
• Gas system checks pass
• Breathing system checks pass
• Ventilation functional test passes
• Protective conductor resistance passes
• Equivalent unit leakage current passes
• Due wear items / battery / pressure regulator intervals are addressed or documented
• Unit is fully reassembled and ready for operation

Remove From Service Criteria

Remove from service if:

• Electrical safety test fails
• Leak testing fails
• Ventilation functional test fails
• O2 failure alarm does not function correctly
• Gas pressure regulation is outside acceptable range and cannot be corrected
• Breathing system valve, absorber, hose, or seal damage affects safe operation
• Control box, display, alarms, or sensors fail functional checks
• Any required post-repair Test Certificate verification cannot be completed

Use the manufacturer service manual, facility policy, and approved AEM program to determine the final PM interval and return-to-service requirements.