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What This Guide Helps With
Troubleshooting helium leak, low helium, cylinder pressure, tubing, or external pneumatic connection issues affecting IABP operation.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Confirm whether the AutoCAT 2 WAVE is actively supporting a patient.
If the pump is in use and a helium leak or low helium alarm is active, notify clinical staff immediately. Have a backup intra-aortic balloon pump available or transfer support per facility policy if therapy is compromised.
Expected outcome: The patient remains supported before Clinical Engineering troubleshooting begins.
If patient support is unstable or balloon inflation is unreliable, stop bedside troubleshooting and escalate immediately.
Confirm the Reported Alarm or Symptom
Observe the AutoCAT 2 WAVE display and confirm the exact alarm, message, or behavior reported.
Look for symptoms such as:
- Low helium alarm
- Helium leak alarm
- Repeated loss of gas pressure
- Poor balloon augmentation
- Balloon not inflating consistently
- Alarm occurring after transport or cylinder change
- Alarm occurring only when the catheter tubing is moved
Expected outcome: The issue is confirmed as helium or pneumatic related before parts are replaced.
Check the Helium Cylinder Supply
Verify that the helium cylinder is present, properly seated, and not empty or near empty.
Confirm the cylinder valve is fully opened if the design requires manual opening.
Expected outcome: The pump has an adequate helium supply.
If the cylinder is empty or low, replace it with an approved full helium cylinder, retest the pump, and stop if the alarm clears.
Verify the Cylinder Is Properly Installed
Remove and reseat the helium cylinder according to facility-approved handling practices.
Check that the cylinder is correctly aligned and secured in the holder or connection point.
Expected outcome: A poor cylinder connection is corrected and the pump recognizes stable helium supply.
If reseating the cylinder resolves the alarm, document the issue and return the device to service only after functional verification.
Inspect for External Helium Leaks
Listen near the cylinder connection, external gas fittings, and catheter connection area for hissing or escaping gas.
Do not open the pump housing or attempt internal pneumatic repair during bedside troubleshooting.
Expected outcome: No obvious external gas leak is heard or felt.
If an external leak is identified at an accessory or connection, replace or reseat the affected external component and retest.
Inspect the IAB Catheter Tubing and Connections
Check the balloon catheter tubing from the patient connection to the pump connection.
Look for:
- Loose catheter connection
- Damaged tubing
- Kinks
- Cracks
- Fluid in the gas tubing
- Contamination at the connector
- Connection that loosens when moved
Expected outcome: The catheter tubing path is intact, dry, secure, and free of obstruction.
If the issue is related to the patient catheter or clinical connection, notify clinical staff immediately. Do not manipulate patient-connected catheter tubing beyond safe external visual checks unless clinical staff directs it.
Check the Pump-to-Catheter Connector
Confirm that the catheter connector is fully seated at the pump.
If safe and not on an active patient, disconnect and reconnect the external catheter adapter or test tubing to confirm proper engagement.
Expected outcome: The connection locks securely and does not trigger a leak alarm when gently moved.
If the connector feels loose, damaged, or unreliable, remove the pump from service or replace the approved external accessory if available.
Determine When the Alarm Occurs
Ask clinical staff when the helium alarm appears:
- Immediately at startup
- During priming or setup
- During pumping
- After transport
- After cylinder replacement
- Only with patient movement
- Only at higher assist ratios
Expected outcome: The failure pattern helps separate a supply issue from a leak, catheter connection issue, or internal pneumatic fault.
Check for Poor Augmentation Along With the Alarm
Review whether the helium alarm is accompanied by weak augmentation, reduced balloon pressure, or inconsistent inflation.
Expected outcome: The alarm is correlated with actual assist performance.
If assist is unreliable, prioritize patient safety and remove the pump from clinical use after alternate support is arranged.
Verify the Device on a Known Good Setup
When the pump is no longer connected to a patient, test it using approved facility test accessories, a known full helium cylinder, and known good external tubing or simulator setup if available.
Expected outcome: The pump operates without helium or leak alarms using verified external accessories.
If the alarm clears on a known good setup, the original issue was likely related to helium supply, catheter connection, tubing, or setup.
Check for Repeated Alarm After External Causes Are Ruled Out
If the pump continues to display helium leak or low helium alarms with a full cylinder, secure external connections, and known good accessories, suspect an internal pneumatic, valve, sensor, regulator, or leak detection issue.
Expected outcome: The device is identified as needing repair or bench evaluation.
Do not continue using the pump clinically if helium delivery cannot be verified as stable.
If the Problem Persists
If the helium leak or low helium alarm continues after checking the cylinder, cylinder seating, external fittings, catheter tubing, pump connection, and known good accessories, common external causes have been ruled out.
The issue is likely internal to the pneumatic or helium delivery system.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to stop is proper troubleshooting. A helium delivery issue on an intra-aortic balloon pump can directly affect balloon inflation and patient support, so unresolved alarms should not be bypassed or ignored.
Clinical Use Tip
Do not troubleshoot a helium leak or low helium alarm extensively while the AutoCAT 2 WAVE is actively supporting a patient. Have clinical staff move the patient to another verified IABP or establish safe alternate support before Clinical Engineering performs detailed troubleshooting. Maintaining therapy continuity should come before extended equipment troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported a helium leak alarm on the Teleflex AutoCAT 2 WAVE during IABP support."
Cause
What was observed during troubleshooting.
Example:
"Found the helium cylinder seated improperly, causing intermittent low helium indication during pump operation."
Resolution
What action was taken.
Example:
"Reseated the helium cylinder, verified stable helium supply, checked external catheter connection, and confirmed the alarm did not return during functional testing."
Helpful Details to Include (If Known)
- Exact helium alarm or message displayed
- Whether the alarm occurred on startup or during pumping
- Helium cylinder pressure or replacement status
- Whether the cylinder was reseated or replaced
- Whether external tubing or catheter connector was inspected
- Any visible damage, kinks, or fluid in tubing
- Whether hissing, gas odor, unusual sound, or leak indication was present
- Whether alarm changed when tubing was moved
- Whether known good test accessories were used
- Final device status: returned to service or removed for repair
Final Thought
Helium-related alarms on an intra-aortic balloon pump should always be treated as patient-safety concerns. Clinical Engineering should work from the outside in: confirm patient safety, verify the helium supply, check external connections, inspect tubing, and only then consider internal pneumatic failure. Clear CCR documentation helps show what was checked, what was found, and why the device was returned to service or escalated for repair.
That is successful troubleshooting.