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Models Covered
Dräger Primus Infinity Empowered only. This page does not automatically cover the base Primus or another Dräger anesthesia workstation. Confirm the model, software, serial number, gas configuration, patient-gas module, oxygen-sensor type, vaporizers, breathing system, UPS, interfaces, and accessories before service.
Manual Reference
Dräger Primus Infinity Empowered Instructions for Use, software 4.5n, document 9053434, plus the current model-, software-, serial-, vaporizer-, option-, and region-specific Dräger technical documentation. The exact controlled service procedure governs test points, tolerances, restricted adjustments, and parts.
Manufacturer Recommendation / AEM Status
- Inspection and safety checks: Every 12 months by experts.
- Every two weeks: Replace the endotracheal aspiration-system filter when that accessory is installed.
- At least every four weeks: Replace the water trap, and replace it sooner when severely soiled or when the applicable sample-line message remains after ruling out blockage or kinking.
- Every 12 months: Replace the upper ventilator diaphragm, patient-gas-module filter mat, power-supply filter mat, ventilator dust filter, vapor plug-system O-rings, water-trap-holder O-rings, and patient-gas-module Nafion hose.
- Every two years: Replace the housing-cover filter mat, gas-inlet sintered filter, breathing-system PEEP diaphragm, Manual/Spontaneous-Automatic reversing diaphragm, patient-gas-module bacterial/viral filter, ventilation/gas-controller bacterial/viral filter, and O-rings between the valve plate and diaphragm cover.
- Every three years: Replace the lower ventilator diaphragm and O-ring and the UPS lead-gel battery. Replace the battery sooner if the BATTERY LOW message occurs.
- Condition based: Replace the CO₂ absorber when its specified color change occurs, the AGS filter when blocked, the fuel-cell O₂ sensor when it cannot be calibrated or O2 SENSOR FAIL occurs, and a flow sensor when calibration is no longer possible.
Safety checks do not replace preventive replacement of wear parts. Internal work, calibration, restricted diagnostics, and complex service belong to qualified personnel using current Dräger documentation. A facility change to a manufacturer-listed interval or activity should be handled through its approved AEM program, documented risk assessment, maintenance history, and applicable regulatory requirements.
What This PM Procedure Covers
- Identity, software, configuration, service history, labels, field actions, and scheduled component status
- Workstation, trolley, castors, brakes, display, controls, power, hoses, gas sources, vaporizers, and accessories
- Breathing system, ventilator, absorber, valves, flow sensors, sampling system, water trap, patient-gas module, and AGS
- Self-test, O₂, CO₂/agent, flow and pressure measurement, ventilation, battery backup, vaporizers, interlock, and alarms
- IEC 62353 electrical safety, final assembly, repeat self-test, and CMMS documentation
Required Tools and Equipment
- Current Primus IE IFU, controlled service procedure, vaporizer manuals, option instructions, service bulletins, and field-action information
- Calibrated anesthesia/ventilator analyzer, test lung, breathing circuit, and configuration-specific adapters
- Certified test gases and calibrated O₂, CO₂, anesthetic-agent, flow, and pressure measurement equipment required by the service procedure
- Approved pipeline and cylinder gas supplies, scavenging connection, leak-test fittings, and pressure-test equipment
- Compatible vaporizers and their specified test fixtures or procedures
- IEC 62353 electrical-safety analyzer
- Correct manufacturer-approved two-week, four-week, annual, two-year, three-year, and condition-based parts
- Approved cleaning/reprocessing supplies, PPE, inspection light, and correct hand tools
Safety: Never perform PM with a patient connected. Provide a ready alternate anesthesia workstation, reprocess the device, isolate electrical and gas supplies before service access, relieve residual gas pressure, and keep oil, grease, ignition sources, and unapproved materials away from oxygen components.
Step-by-Step PM Procedure
1. Remove the Anesthesia Workstation From Clinical Use
Action: Confirm no patient or procedure depends on the Primus IE, provide verified alternate equipment, remove patient-use items, label the workstation unavailable, and complete the current reprocessing procedure.
Expected outcome: The Primus IE is clean, isolated from clinical use, and safe for maintenance.
2. Verify Identity, Software, and Configuration
Action: Record asset tag, exact model, serial number, software, mains rating, gas mixer and configured gases, pipeline/cylinder arrangement, breathing system, patient-gas module, O₂ sensor type, vaporizers, AGS, UPS, data interfaces, suction, auxiliary outlets, and other installed accessories. Confirm it is Primus IE, not base Primus.
Expected outcome: The asset matches the CMMS record and the correct manual, parts, options, and test path are positively identified.
3. Review History and Due Maintenance
Action: Review prior PM, self-test results, leaks, repairs, drops, liquid entry, gas/agent/ventilation complaints, alarms, power events, software updates, field actions, battery history, and all scheduled-part dates. Identify every overdue or condition-based item before testing.
Expected outcome: All open work and every applicable two-week, four-week, annual, two-year, three-year, and condition-based action are known.
4. Inspect Documentation, Labels, and Completeness
Action: Confirm the current IFU and required instructions are available. Inspect serial, rating, gas, connection, fuse, vaporizer, warning, and option labels. Verify the configured gases and components match the installed hardware and that required accessories are present.
Expected outcome: Documentation, identification, configuration, external fuse values, and required components are complete and correct.
5. Inspect the Workstation and Trolley
Action: Inspect the housing, trolley, castors, brakes, drawers, work surface, display, controls, rotary knob, alarm light, speakers, handles, rails, support arms, cords, plugs, protective-earth and equipotential connections, outlets, hoses, connectors, strain reliefs, fan openings, and cable management. Check for cracks, impact, looseness, corrosion, contamination, heat damage, fluid entry, or unauthorized modification.
Expected outcome: The workstation is stable, clean, complete, and free of physical or electrical damage.
6. Inspect Gas Supplies and Emergency Oxygen
Action: Inspect pipeline hoses and inlets, cylinder yokes, seals, restraints, regulators, pressure indications, check valves, gas identification, O₂ flush, and emergency O₂ delivery. Verify correct source recognition and controlled changeover/failure response using the applicable procedure.
Expected outcome: Each gas source is correctly identified, secure, leak-free, recognized, and capable of supplying the workstation; emergency oxygen functions correctly.
7. Inspect Vaporizers and the Plug-In System
Action: Inspect each vaporizer, agent label, level, fill/drain system, mounts, seals, locking mechanism, and plug-in interlock. Verify that only one vaporizer can be activated and test concentration delivery under the current vaporizer-specific procedure.
Expected outcome: Vaporizers are correctly identified, securely mounted, leak-free, interlocked, and deliver concentration within the governing vaporizer specification.
8. Inspect the Breathing System and Ventilator
Action: Inspect the breathing-system housing, inspiratory/expiratory valves, APL valve, absorber, bag arm, reservoir bag, hoses, Y-piece, flow sensors, PEEP diaphragm, reversing diaphragm, ventilator upper/lower diaphragms, valve-plate seals, O-rings, connectors, and installed filters. Replace due parts only according to the current service procedure.
Expected outcome: The breathing and ventilator systems are clean, dry, intact, correctly assembled, and current on scheduled components.
9. Inspect Gas Sampling, Monitoring, and Scavenging
Action: Inspect the sample line, water trap and holder, patient-gas module, Nafion hose, bacterial/viral filters, O₂ sensor, AGS, scavenging transfer hose, receiver, and filter. Replace the water trap at four weeks or sooner when indicated; never wash, flush, or sterilize it.
Expected outcome: Sampling, gas monitoring, and scavenging pathways are clean, unobstructed, leak-free, correctly assembled, and current on scheduled parts.
10. Inspect Power, Cooling, and UPS Components
Action: Inspect the mains inlet and cord, accessible fuses, auxiliary outlets, power-supply and housing filter mats, ventilator dust filter, cooling paths, UPS battery, battery connections, and service date. Replace filters and battery when due.
Expected outcome: Mains power, cooling airflow, battery retention, backup power, charging, and scheduled filter status are acceptable.
11. Complete the Full Self-Test
Action: Install the approved breathing circuit, test lung, absorber, flow sensors, sampling components, water trap, vaporizers, gas supplies, and scavenging. Complete the device checklist and run the full self-test without cancellation except for a genuine emergency. Record overall status, leakage/compliance, calibrations, and every advisory.
Expected outcome: The self-test completes successfully with no unresolved limitation, calibration failure, or leak.
12. Verify Leakage and Breathing-System Performance
Action: Perform the automatic and controlled service leakage/compliance checks for the assembled breathing system, ventilator, hoses, absorber, bag, valves, vaporizers, sampling connections, and installed accessories. Repeat testing after any component is opened or replaced.
Expected outcome: All leakage, compliance, valve, and circuit checks meet the current Primus IE criteria.
13. Verify Gas, Flow, Pressure, and Ventilation Performance
Action: With calibrated analyzers, test representative fresh-gas settings, gas composition, O₂ delivery and monitoring, flow measurement, pressure measurement, O₂ flush, and oxygen-failure protections. Verify representative installed ventilation modes, tidal volume, rate/timing, airway pressure, PEEP, inspiratory flow, minute volume, APL function, and manual/spontaneous operation using controlled service points.
Expected outcome: Delivered and displayed gas, flow, pressure, and ventilation values meet the exact service-procedure tolerances and safety responses operate correctly.
14. Verify CO₂ and Anesthetic-Agent Measurement
Action: Apply approved test gas and verify the patient-gas module’s CO₂ and anesthetic-agent measurement, agent identification, waveform/numeric display, sample flow, and related alarms. Confirm the water trap and sampling path remain dry and unobstructed.
Expected outcome: Gas and agent measurements are stable, correctly identified, and within the applicable controlled tolerances.
15. Verify Alarms and Safety Features
Action: Test the alarm generator and applicable high/low pressure, apnea, volume, O₂, CO₂/agent, circuit, flow, gas-supply, scavenging, sensor, mains-power, battery, and system alarms. Verify audible/visual annunciation, priority, silence/reset behavior, vaporizer interlock, O₂ failure response, and safe fallback behavior.
Expected outcome: Every required alarm and safety feature detects, displays, sounds, prioritizes, and clears correctly.
16. Verify Battery Backup
Action: Fully charge the UPS battery, disconnect mains under the controlled non-patient setup, verify uninterrupted operation and the correct power alarm/indication, perform the applicable battery test, then restore mains and confirm charging. Replace the battery at three years or sooner for BATTERY LOW.
Expected outcome: The Primus IE transfers to battery without unsafe interruption, provides the required backup performance, alarms correctly, and resumes charging.
17. Complete Scheduled Component Replacement
Action: Verify and document all applicable annual, two-year, and three-year parts listed above. Replace condition-based absorber, AGS filter, fuel-cell O₂ sensor, or flow sensor when indicated. Record part numbers, lots, dates, personnel, and post-replacement verification.
Expected outcome: Every applicable scheduled and condition-based component is current, correctly installed, and traceable.
18. Perform IEC 62353 Electrical Safety Testing
Action: Test the complete configured workstation and connected electrical accessories according to IEC 62353, the current Dräger procedure, equipment class, applied parts, and regional requirements. Record analyzer identification, method, test points, governing limits, and actual measurements.
Expected outcome: Every required electrical-safety measurement passes the documented criterion.
19. Restore, Retest, and Document
Action: Remove test equipment, reinstall covers and approved accessories, restore authorized settings, reprocess/reassemble as required, reconnect gases and mains, and run a final complete self-test after service. Document all results, parts, calibration data, corrective work, and disposition.
Expected outcome: No test setting remains; the final self-test and configured-system check pass; and the unit is either formally returned to service or clearly quarantined.
Electrical Safety Testing
Dräger includes electrical safety according to IEC 62353 in the annual safety check. The public IFU does not provide one universal numeric limit for every regional method, equipment class, applied part, auxiliary outlet, and accessory configuration. Use the current controlled Dräger procedure and the standard edition adopted by the facility.
Analyzer / serial / calibration due:
Result =
Model / mains rating / equipment class / applied parts / accessories / method:
Result =
Protective-earth resistance, where applicable:
Test points =
Governing limit =
Highest result =
Pass / Fail / N/A =
Equipment or touch leakage:
Governing limit =
Highest result =
Pass / Fail =
Applied-part / auxiliary-outlet / connected-accessory measurements:
Limits / results / N/A =
Pass / Fail Criteria
Pass
- Annual inspection and safety checks are current; documentation, identity, configuration, labels, structure, mobility, controls, cords, hoses, outlets, accessories, and fuses are acceptable
- Breathing system, ventilator, valves, absorber, flow sensors, sampling system, patient-gas module, water trap, AGS, vaporizers, and interlock pass
- Full self-test, leakage/compliance, O₂, CO₂/agent, flow, pressure, ventilation, battery backup, alarms, and safety responses pass
- All required two-week, four-week, annual, two-year, three-year, and condition-based parts are current
- IEC 62353 electrical safety and final post-service self-test pass
- No unresolved physical, gas, agent, ventilation, monitoring, alarm, power, software, field-action, or safety fault remains
Remove From Service
- Self-test, leakage/compliance, gas/agent delivery, oxygen safety, ventilation, monitoring, alarm, backup-power, or electrical-safety testing fails
- Physical, electrical, gas, vaporizer, breathing-system, ventilator, sampling, scavenging, or accessory damage could affect safe anesthesia delivery
- A required scheduled component, inspection, qualified technician, calibrated instrument, current service procedure, or backup anesthesia workstation is unavailable
- Any unresolved condition could cause incorrect gas composition, agent delivery, ventilation, monitoring, alarm annunciation, or power continuity
Copy/Paste CMMS Work Order Procedure
Do not return the Primus IE to service with a failed self-test, unacceptable leak, inaccurate gas/agent or ventilation delivery, unreliable alarm, overdue scheduled component, failed battery or electrical-safety result, or any unresolved condition that could affect anesthesia delivery.