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What This Guide Helps With
Troubleshoots weak, absent, distorted, or abnormal alarm audio caused by controls, obstruction, environment, power state, or speaker-related problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Provide Alternate Alarm Surveillance
An IABP with unreliable alarm audio should not be depended upon without continuous alternative surveillance. If the unit is supporting a patient, notify clinical staff and provide an alternate verified IABP when safe alarm awareness cannot be maintained.
Do not continue unattended use of equipment with unreliable critical alarms.
Expected outcome: Clinicians have an effective means of detecting therapy or equipment problems.
2. Confirm the Exact Alarm Audio Problem
Determine whether audio is completely absent, unusually weak, distorted, intermittent, continuous, or fails to respond correctly to the normal silence function.
Observe visual alarm indications at the same time.
Expected outcome: The alarm-audio failure mode is clearly characterized.
3. Verify the Alarm Condition and Normal Controls
Use an approved test method to determine whether the device generates expected audible and visual alarm indications. Verify that the normal alarm-silence control responds as intended without remaining stuck or requiring excessive force.
Do not create unsafe clinical conditions merely to produce an alarm.
Expected outcome: Alarm controls operate normally. If a simple control obstruction or operational condition is corrected and alarm behavior becomes normal, verify and stop troubleshooting.
4. Inspect for Physical Obstruction
Check that speaker openings are not covered by tape, labels, accessories, blankets, mounting hardware, packaging, or contamination.
Expected outcome: The speaker area is unobstructed. If removing an obstruction restores clear audio, perform final alarm verification and stop troubleshooting.
5. Consider the Clinical Environment
Assess whether the complaint of weak audio is related to unusually high ambient noise rather than reduced speaker output. Compare the unit with another verified Cardiosave when practical.
Expected outcome: The alarm is clearly audible under an appropriate controlled comparison. If the unit is noticeably weaker than a known-good device, further evaluation is required.
6. Check Power-State Dependence
With the device off-patient, verify whether alarm audio changes between normal AC and battery operation or after startup.
Unexpected differences may indicate a broader power or electronics problem.
Expected outcome: Alarm audio remains consistent across normal operating power states.
7. Inspect External Controls for Damage
Check the alarm-silence button or associated controls for cracks, sticking, contamination, liquid intrusion, or physical damage.
Do not open the control panel or attempt internal switch repair.
Expected outcome: External controls move and respond normally. Physical damage requires service evaluation.
8. Perform Approved Alarm Testing
Using appropriate manufacturer documentation and approved test equipment, perform the applicable alarm checks. Verify audible output, visual alarm indication, and proper response of the silence function.
Do not invent a sound-level limit if an approved specification is not available.
Expected outcome: All required alarm tests pass. If so, troubleshooting can stop.
9. Verify Overall Device Function
Confirm that the alarm problem is not accompanied by display, keypad, power, speaker, or startup abnormalities that suggest a broader system failure.
Expected outcome: All other critical functions operate normally. Multiple related abnormalities require escalation.
10. Remove From Service if Alarm Reliability Is Uncertain
If alarm audio remains weak, absent, intermittent, or behaves incorrectly during approved testing, remove the Cardiosave from service.
A functioning therapeutic device with unreliable alarms is still not suitable for normal clinical use.
Expected outcome: The device is prevented from returning to clinical service until alarm reliability is restored.
If the Problem Persists
External obstruction, controls, environmental noise, power state, and basic functional causes have been ruled out. Remaining possibilities include the speaker, alarm-control circuitry, user-interface electronics, software, or other internal service-level faults.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate Getinge documentation and approved alarm test equipment
- Repaired or configured only by qualified personnel
Following repair, verify audible and visual alarms, silence behavior, therapeutic operation, power transitions, and applicable electrical safety requirements before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Never rely on visual alarms alone as a permanent workaround for failed IABP alarm audio; critical alarm annunciation must be verified before routine clinical use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the Cardiosave alarm sounded unusually weak during use."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that an accessory pouch was positioned over the external speaker opening."
Resolution
What action was taken.
Example:
"Clinical Engineering repositioned the accessory, verified clear audible and visual alarm annunciation with approved testing, and returned the unit to service."
Helpful Details to Include (If Known)
- Whether audio was weak, absent, distorted, or continuous
- Visual alarm behavior
- Alarm-silence control response
- Speaker-area obstruction
- Ambient noise conditions
- AC versus battery behavior
- External control condition
- Comparison with a known-good unit
- Alarm test results
- Final device status
- Whether audio was weak, absent, distorted, or continuous
- Visual alarm behavior
- Alarm-silence control response
- Speaker-area obstruction
- Ambient noise conditions
- AC versus battery behavior
- External control condition
- Comparison with a known-good unit
- Alarm test results
- Final device status
Final Thought
Reliable alarms are part of safe IABP therapy. Verify external obstruction, controls, environment, power state, and approved alarm behavior before assuming internal failure, and remove the Cardiosave from service whenever alarm reliability remains uncertain.
That is successful troubleshooting.