On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshooting lost ECG or pressure triggering, unstable assist timing, missed beats, poor synchronization, or unreliable IABP assist timing.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Before troubleshooting, confirm the patient is clinically supported and the balloon pump is not creating unsafe timing or hemodynamic instability.
Action:
- Notify clinical staff immediately if triggering or timing appears unstable.
- Do not continue troubleshooting on an unstable patient without clinical support present.
- If assist timing is unsafe, have qualified clinical staff place the pump in the safest available mode or transition support according to facility policy.
- If another IABP is available and the issue appears equipment-related, prepare for device swap-out.
Expected outcome: Patient support is maintained safely while troubleshooting begins.
Why it matters: Incorrect IABP timing can reduce assist benefit and may worsen patient hemodynamics.
Verify the Reported Trigger Problem
Confirm whether the issue is loss of ECG trigger, pressure trigger, timing drift, missed assists, double triggering, or unstable augmentation.
Action:
- Observe the displayed ECG waveform.
- Observe the arterial pressure waveform.
- Check whether the pump is alarming for trigger loss, poor ECG signal, pressure signal loss, or timing instability.
- Ask staff when the issue started: after transport, after cable movement, after patient repositioning, after changing trigger source, or after switching modules, leads, or pressure cables.
Expected outcome: The failure mode is clearly identified before parts are swapped.
Why it matters: ECG trigger loss and pressure trigger loss may look similar clinically but usually have different causes.
Check the Patient and Clinical Setup Before Blaming the Pump
Confirm the patient rhythm and physiologic signals are appropriate for the selected trigger mode.
Action:
- Ask clinical staff whether the patient has arrhythmias, pacing, low pulse pressure, poor arterial waveform, artifact, or frequent ectopy.
- Confirm the selected trigger source matches the best available signal.
- If the ECG signal is poor, pressure triggering may be more appropriate if the arterial waveform is reliable.
- If the pressure waveform is poor, ECG triggering may be more reliable if QRS detection is stable.
Expected outcome: The selected trigger mode matches the patient’s current rhythm and waveform quality.
Why it matters: Trigger instability may be caused by patient condition, not equipment failure.
Inspect ECG Lead Placement and ECG Signal Quality
Poor ECG signal is one of the most common external causes of IABP trigger loss.
Action:
- Confirm ECG electrodes are fresh, well-adhered, and placed correctly.
- Replace loose, dried, wet, or lifted electrodes.
- Check for patient cable strain, motion artifact, or leads pulling during movement.
- Verify the ECG waveform on the Cardiosave display has a clear QRS complex.
- Try an alternate ECG lead selection if the current lead has low amplitude or excessive artifact.
Expected outcome: A clean ECG waveform appears and the pump triggers consistently from the QRS complex.
If this resolves the issue, document the lead/electrode problem and return the device to use if timing is verified by qualified staff.
Check the ECG Cable and Connection to the Pump
A damaged or partially connected ECG cable can cause intermittent trigger loss.
Action:
- Inspect the ECG trunk cable and lead wires for cracks, strain damage, bent pins, loose connectors, or contamination.
- Reseat the ECG cable at the pump.
- Confirm the connector is fully seated and not under tension.
- Swap with a known-good ECG cable or lead set if available.
- Gently move the cable while observing for waveform dropout.
Expected outcome: ECG remains stable without dropouts when the cable is handled normally.
Why it matters: Intermittent cable failures often appear only when the patient, bed, or pump is moved.
Verify Pressure Source and Arterial Line Setup
If pressure triggering is being used, confirm the arterial pressure signal is valid and not dampened or distorted.
Action:
- Confirm the arterial pressure cable is connected securely to the Cardiosave.
- Check the pressure transducer connection and cable strain relief.
- Ask clinical staff to verify the arterial line is patent, properly leveled, and zeroed.
- Look for a clear arterial upstroke on the pump display.
- Check for dampened waveform, square-wave artifact, air bubbles, loose stopcocks, kinked tubing, or flush system issues.
Expected outcome: The pressure waveform has a clean upstroke and consistent amplitude.
If this resolves the issue, stop troubleshooting and document the pressure line or transducer setup correction.
Inspect the Pressure Cable and Transducer Interface
If the pressure waveform is missing or intermittently dropping out, focus on the external pressure cable path.
Action:
- Reseat the pressure cable at the pump.
- Inspect the pressure cable for damaged insulation, stretched sections, bent pins, or loose connector shells.
- Swap the pressure cable with a known-good cable if available.
- Confirm the transducer or pressure module is compatible and functioning.
- Move the cable gently while watching for waveform dropout.
Expected outcome: The pressure waveform remains stable and pressure trigger operates consistently.
Why it matters: A weak or intermittent pressure cable can cause missed triggers or unstable timing even when the arterial line is good.
Check Trigger Source Selection and Timing Settings
Confirm the pump is set to the correct trigger source and assist timing for the patient’s current condition.
Action:
- Verify the selected trigger source: ECG, pressure, pacing, or other available trigger mode as appropriate.
- Confirm the selected trigger source matches the displayed waveform.
- Ask qualified clinical staff to verify inflation and deflation timing.
- Confirm assist ratio and timing settings were not changed accidentally.
- If timing instability began after a mode change, return to the previously stable trigger source if clinically appropriate.
Expected outcome: Trigger source and timing settings match the patient signal and assist timing stabilizes.
Why it matters: A good signal will still perform poorly if the wrong trigger mode or timing setup is selected.
Check for Pacing-Related Trigger Problems
Paced rhythms can cause trigger confusion if the pump detects pacing spikes instead of true cardiac activity.
Action:
- Confirm whether the patient is internally or externally paced.
- Observe whether the pump is triggering from the QRS complex or from pacing spikes.
- Ask clinical staff to select the most appropriate trigger mode for paced rhythm support.
- Confirm the ECG waveform has enough separation between pacing spikes and QRS complexes.
- Try another ECG lead if the current lead exaggerates pacing artifact.
Expected outcome: The pump triggers from the intended cardiac event, not artifact or pacing spikes.
Why it matters: Pacing spikes, low-amplitude QRS complexes, or fusion beats can create unstable IABP timing.
Check for Motion, Transport, and Electrical Noise
Trigger instability that appears during transport or movement often points to artifact or connection issues.
Action:
- Confirm whether the issue occurs only during movement.
- Check ECG and pressure cables for tension, tugging, or intermittent contact.
- Move power cords, pump cables, and patient cables away from high-noise equipment when practical.
- Confirm electrodes and pressure cables are secured before transport.
- Check whether the issue improves when the patient and cables are stationary.
Expected outcome: Triggering remains stable during normal movement and transport preparation.
Why it matters: IABP trigger signals are sensitive to poor electrodes, loose cables, and motion artifact.
Verify Displayed Waveforms Against External Monitoring
Compare the Cardiosave signals with the bedside monitor when safe and appropriate.
Action:
- Compare ECG waveform quality on the IABP and bedside monitor.
- Compare arterial pressure waveform appearance on the IABP and bedside monitor.
- Determine whether the signal problem follows the patient source or is isolated to the IABP.
- If the bedside monitor waveform is clean but the IABP waveform is poor, suspect IABP cable, module, or input issue.
- If both displays show poor waveform quality, suspect patient lead placement, pressure line setup, or physiologic cause.
Expected outcome: The source of the trigger problem is narrowed to patient setup, cable path, or the IABP itself.
Why it matters: Comparing signals helps prevent unnecessary pump removal when the issue is upstream.
Power Cycle Only When Clinically Safe
Do not restart the pump during active support unless clinical staff confirm it is safe.
Action:
- If the pump is not actively supporting a patient, power cycle the unit and observe startup.
- Confirm no trigger-related error returns after restart.
- Reconnect ECG and pressure inputs one at a time if needed.
- Verify the pump detects stable ECG and pressure waveforms during bench or controlled clinical evaluation.
Expected outcome: Temporary software or detection issues clear without recurring.
Why it matters: A restart may clear a transient issue, but it should never interrupt critical patient support without clinical approval.
Check for Recurring or Internal Failure Indicators
If known-good cables, good electrodes, good pressure setup, and proper settings do not resolve the issue, suspect an internal input, processing, or system fault.
Action:
- Note any recurring trigger alarms, waveform dropouts, frozen waveforms, display delays, or input channel failures.
- Check whether the issue affects only ECG, only pressure, or multiple signal inputs.
- Record any error codes or event log details available without entering restricted service procedures.
- Remove the device from clinical use if trigger detection remains unreliable.
Expected outcome: The device is identified as unsafe for continued use until evaluated further.
Why it matters: Reliable triggering is core IABP functionality. A pump with unresolved trigger instability should not remain in service.
If the Problem Persists
If ECG electrodes, ECG cable, pressure cable, arterial line setup, trigger source selection, timing settings, and patient-related causes have been ruled out, the issue is likely internal to the IABP signal input, processing, display, or control system.
The device must be removed from service, labeled Out of Service, replaced with another IABP if patient support is required, and sent for repair or bench evaluation.
Escalate to qualified service support or the manufacturer as required by facility policy.
Knowing when to stop is proper troubleshooting. A Cardiosave with unreliable trigger detection or assist timing should not be returned to patient use until the cause is corrected and function is verified.
Clinical Use Tip
Do not troubleshoot trigger instability casually while the patient depends on the IABP for support. Move the patient to safe support first, involve qualified clinical staff, and only adjust trigger or timing settings when clinically appropriate. If therapy continuity is required, transition the patient to a backup device or alternate support before equipment troubleshooting continues.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported intermittent ECG trigger loss and unstable assist timing on the Getinge Cardiosave Hybrid / Rescue IABP during patient support."
Cause
What was observed during troubleshooting.
Example:
"ECG electrodes were lifting and the ECG trunk cable connection was under tension, causing intermittent QRS detection and missed triggers."
Resolution
What action was taken.
Example:
"Replaced ECG electrodes, reseated and secured ECG cable, verified stable ECG waveform and consistent triggering with clinical staff before returning unit to service."
Helpful Details to Include (If Known)
- Trigger mode selected when issue occurred
- ECG waveform quality
- Pressure waveform quality
- Patient rhythm or pacing status
- Alarm messages or error codes
- Whether issue occurred during transport or movement
- ECG electrodes replaced
- ECG cable swapped or reseated
- Pressure cable swapped or reseated
- Arterial line leveled, zeroed, and checked by clinical staff
- Timing verified by qualified staff
- Whether issue followed the patient setup or stayed with the pump
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Trigger loss and assist timing instability should be approached carefully because the pump, patient setup, cables, clinical settings, and patient rhythm can all contribute. Start with safety, verify the waveform source, rule out external causes, and escalate when reliable triggering cannot be confirmed. Clear documentation protects the patient, the equipment record, and the next person troubleshooting the device.
That is successful troubleshooting.