Getinge Servo-u Ventilator

Asset Type

Ventilator

Manufacturer

Getinge

Model

Servo-u

What This Guide Helps With

This guide addresses situations where the Servo-u ventilator displays gas supply pressure alarms (Air or O₂) even though the wall supply appears normal and other equipment in the room is functioning correctly.

The focus is on logical, external troubleshooting steps first — wall source, hoses, connections, filters, and setup — before assuming an internal pressure sensor or pneumatic fault.

Step-by-Step Troubleshooting

1. Ensure Patient Safety First

• Confirm the patient is stable.
• If the ventilator is actively alarming and ventilation is compromised, immediately transition the patient to another ventilator or manual ventilation before troubleshooting.
• Do not troubleshoot gas supply issues on an actively dependent patient.

2. Verify the Wall Gas Source

• Confirm the correct gas outlets are being used (Air to Air, O₂ to O₂).
• Check that the wall outlets are firmly engaged and not partially disconnected.
• Test the outlet using:
  • A known-good device, or
  • A pressure gauge if available.
• Even if other equipment is working, the specific outlet feeding this ventilator may have intermittent pressure fluctuation.

3. Check Gas Hoses

• Inspect both Air and O₂ hoses from wall to ventilator.
• Look for:
  • Kinks
  • Compression under bed wheels
  • Cracks or worn fittings
  • Loose DISS or quick-connect fittings
• Swap with known-good hoses to rule out internal hose obstruction.
• Why this matters: A partially obstructed hose can create pressure drop under flow demand, triggering alarms despite static wall pressure appearing normal.

4. Confirm Secure Connection at the Ventilator

• Ensure both gas fittings are fully seated and hand-tightened (if DISS type).
• Listen for leaks.
• Check for hissing or audible flow irregularities.
• Loose fittings may pass static pressure but fail under ventilator demand.

5. Inspect Water Traps and Filters (If Installed)

• Some setups include inline water traps or filters.
• Check for:
  • Moisture accumulation
  • Blockage
  • Incorrect installation direction
• Replace or remove (temporarily for testing) if obstruction is suspected.

6. Review Alarm Message Details

• Access the ventilator alarm log and note:
  • Which gas source is alarming (Air, O₂, or both)
  • Whether it is low pressure, high pressure, or fluctuation alarm
  • Timing (continuous vs intermittent)
• If both gases are alarming simultaneously, suspect:
  • Internal pneumatic module issue
  • Internal pressure sensor fault
  • Software-related monitoring fault
• If only one gas alarms:
  • Focus troubleshooting on that specific supply line

7. Power Cycle the Ventilator (When Safe)

• After patient transfer or safe condition:
• Power down fully
• Disconnect AC power briefly
• Restart system
• Transient sensor faults can occasionally clear after reboot.

8. Run a Pre-Use Check

• Perform the full system pre-use check and observe:
• Supply pressure readings
• Calibration results
• Leak test outcome
• Failure during the supply pressure verification phase strongly suggests internal sensing or pneumatic regulation issues.

If the Problem Persists

If:

• Wall supply is verified
• Hoses have been replaced
• Connections are secure
• No external obstructions are present
• Alarm continues during pre-use check

The issue is likely internal to the ventilator, such as:

• Gas inlet pressure sensor failure
• Internal regulator malfunction
• Pneumatic module fault
• Internal leak

At this point:

• Remove the ventilator from service
• Label it Out of Service
• Send for qualified repair or bench evaluation

Knowing when to stop external troubleshooting is proper Clinical Engineering practice.

Clinical Use Tip

Never troubleshoot gas supply alarms on a ventilator connected to a dependent patient unless backup ventilation is immediately available. Always secure alternate ventilation first before removing wall gas supply or power cycling the device.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
“Ventilator alarming low O₂ supply pressure despite wall outlet showing normal pressure.”

Cause

What was observed during troubleshooting.

Example:
“Observed persistent low O₂ supply alarm after confirming adequate wall pressure and replacing gas hose. Pre-use check failed supply pressure verification.”

Resolution

What action was taken.

Example:
“Removed ventilator from service. Labeled Out of Service and sent to vendor for pneumatic module evaluation.”

Helpful Details to Include

• Wall outlet tested and verified
• Hoses swapped
• Which gas source alarmed
• Pre-use check result
• Alarm log reviewed
• Any audible leaks
• Final device status

Final Thought

Gas supply alarms can appear complex, but most are caused by simple external issues — loose fittings, kinked hoses, or blocked lines. Logical, stepwise troubleshooting protects patient safety and prevents unnecessary internal disassembly. When external causes are ruled out, confident escalation is the correct decision. Proper documentation ensures traceability and supports future reliability tracking.

That is successful troubleshooting.