Drager Apollo

Asset Type

Anesthesia Machine

Manufacturer

Drager

Model

Apollo

What This Guide Helps With

This guide helps troubleshoot the O2 CYLIND. EMPTY alarm on a Drager Apollo anesthesia machine when the O2 backup cylinder is empty or closed and pipeline oxygen supply is unavailable, missing, or not connected.

This condition can affect oxygen availability for fresh-gas delivery, backup oxygen supply, machine checkout, and safe anesthesia system operation.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Immediately notify anesthesia staff if the alarm occurs during patient use.
• Do not continue using the machine for patient care if oxygen supply is not available or cannot be confirmed.
• If the machine is in active patient use, clinical staff should move the patient to a safe oxygen source, manual ventilation method, or alternate anesthesia system as clinically appropriate.
• Do not troubleshoot oxygen supply problems on an active patient unless anesthesia staff confirm it is safe.

Verify the Reported Alarm and Behavior

• Confirm the displayed alarm is exactly O2 CYLIND. EMPTY.
• Observe whether the alarm occurs at startup, during pre-use checkout, during case setup, during active use, or after pipeline oxygen is disconnected.
• Check for related signs such as low O2 supply pressure, missing pipeline oxygen, closed cylinder valve, empty cylinder, failed checkout, or oxygen supply pressure alarms.
• Confirm whether the alarm is active and repeatable, not only a previously silenced or misunderstood alarm condition.

Check Pipeline Oxygen Supply First

• Verify the wall oxygen hose is connected to the proper oxygen outlet.
• Confirm the hose is fully seated and not loose at the wall outlet.
• Check that the hose is connected securely to the Apollo O2 pipeline inlet.
• Inspect the oxygen hose for damage, kinks, incorrect gas connection, missing fittings, or loose connections.
• If reconnecting or correcting the pipeline oxygen supply clears the alarm, perform the required anesthesia machine checkout before returning the unit to service.

Confirm Wall Oxygen Source Is Available

• Verify that the wall oxygen outlet is supplying oxygen.
• Try a known-good oxygen outlet if available and clinically appropriate.
• Confirm whether other devices connected to the same wall source are receiving oxygen normally.
• If there is concern about facility oxygen supply, notify Facilities, Respiratory Therapy, or the appropriate clinical support team immediately.

Check the O2 Backup Cylinder Valve

• Verify an O2 cylinder is installed on the machine.
• Confirm the cylinder valve is open.
• Check that the cylinder is properly seated and secured.
• Look for signs that the valve was left closed during setup, storage, or transport.
• If opening the cylinder valve clears the alarm, continue with the required anesthesia machine checkout before returning the device to clinical use.

Check O2 Cylinder Pressure

• Read the O2 cylinder pressure gauge.
• Confirm the cylinder is not empty or below usable pressure.
• Replace the O2 cylinder if the pressure is empty, very low, or questionable.
• If replacing the cylinder clears the alarm, document the cylinder replacement and verify the machine checkout passes.

Inspect Cylinder Installation

• Confirm the cylinder is installed correctly in the yoke or cylinder connection.
• Check that the cylinder is not misaligned.
• Verify the washer or seal is present and not damaged if applicable.
• Make sure the cylinder connection is tightened properly without forcing it.
• Listen and check for obvious leaks around the cylinder connection if safe to do so.

Isolate Pipeline Versus Cylinder Issue

• With clinical approval and only when safe, check whether the alarm clears with a known-good pipeline oxygen source connected.
• Check whether the alarm clears with a known-good O2 cylinder installed and opened.
• If pipeline O2 restores normal operation, the likely issue is pipeline supply, wall source, hose, or connection related.
• If a new open O2 cylinder restores normal operation, the likely issue is an empty, closed, or improperly installed cylinder.
• If neither supply source clears the alarm, the issue may be internal to the machine.

Stop When Resolved

• If the alarm clears after correcting the oxygen pipeline connection, opening the O2 cylinder, or replacing the cylinder, run the required anesthesia machine checkout.
• Confirm no oxygen supply alarms return.
• Confirm oxygen supply pressure is stable.
• Return the machine to service only after checkout passes and the oxygen supply issue is corrected.

If the Problem Persists

If the O2 CYLIND. EMPTY alarm remains after verifying pipeline oxygen supply, installing a known-good O2 cylinder, opening the cylinder valve, checking cylinder pressure, and inspecting external connections, external and common causes have been ruled out.

Persistent alarm conditions may indicate an internal oxygen supply sensing issue, pressure detection problem, gas inlet issue, regulator issue, or internal pneumatic fault.

Remove the anesthesia machine from service.

Label it Out of Service.

Send it for repair or bench evaluation according to department procedure.

Clinical Use Tip

Never troubleshoot on an active patient. Move the patient to a backup device, safe oxygen source, or approved alternate ventilation method first.

Do not rely on an anesthesia machine with unresolved oxygen supply alarms. Oxygen pipeline and backup cylinder supply should both be verified during setup, checkout, and before patient use.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Drager Apollo anesthesia machine displayed O2 CYLIND. EMPTY alarm. Staff reported O2 backup cylinder was unavailable and pipeline O2 supply was not connected or not available."

Cause

What was observed during troubleshooting.

Example:
"O2 backup cylinder was empty or closed while pipeline oxygen supply was unavailable. External oxygen supply issue confirmed before internal failure was suspected."

Resolution

What action was taken.

Example:
"Verified patient safety and removed machine from use during troubleshooting. Checked pipeline O2 connection, wall source, O2 cylinder valve, cylinder pressure, and cylinder installation. Opened or replaced O2 cylinder and restored pipeline oxygen supply as needed. Alarm cleared and anesthesia machine checkout passed before return to service."

Helpful Details to Include (If Known)

• Alarm behavior
• Accessories swapped
• Power behavior
• Environmental factors
• Indicator lights
• Final device status

Final Thought

The O2 CYLIND. EMPTY alarm should be treated as an oxygen supply availability issue first, not an immediate internal machine failure. Start with patient safety, confirm the alarm, check pipeline oxygen, verify the backup cylinder, and only escalate after external supply issues are ruled out. Clear documentation helps show whether the issue was caused by setup, supply, cylinder condition, or a likely device fault.

That is successful troubleshooting.