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What This Guide Helps With
Troubleshoots shock-delivery failures involving mode selection, pads, therapy cables, controls, battery power, connections, or service-level faults.
Step-by-Step Troubleshooting
1. Protect the Patient Immediately
If shock delivery is required or may become necessary and the DEFIGARD Touch 7 cannot reliably arm, charge, or discharge, immediately place another verified defibrillator into service.
Do not continue troubleshooting a therapy-delivery fault while a patient depends on the affected unit.
Expected outcome: Emergency defibrillation capability is maintained using reliable equipment.
2. Confirm the Exact Failure
Determine whether the unit:
- Will not enter the required therapy mode.
- Will not recognize the connected therapy accessory.
- Will not begin charging.
- Charges but will not arm for shock.
- Arms but will not discharge.
- Displays an unexpected therapy-related message.
Record the exact displayed message if present.
Expected outcome: The failure stage is clearly identified.
3. Verify Basic Power and Battery Condition
Confirm the unit starts normally and has adequate available power for testing.
Connect approved external power when applicable and verify the installed battery is detected.
If power behavior is abnormal, resolve the power issue before continuing.
Expected outcome: The defibrillator has stable power and is ready for controlled bench testing.
4. Inspect Therapy Pads, Paddles, and Cable Connections
Inspect the therapy accessory and cable for:
- Incomplete insertion.
- Bent or damaged contacts.
- Damaged insulation.
- Contamination.
- Expired or compromised disposable pads.
- Incorrect accessory connection.
Reconnect all components fully.
Expected outcome: The proper therapy accessory is connected securely and is recognized by the device.
5. Substitute Known-Good Therapy Accessories
When permitted, use approved known-good therapy pads, paddles, or therapy cable to determine whether the problem follows the accessory.
Do not perform uncontrolled shock testing.
Expected outcome: A known-good accessory is recognized and allows the therapy sequence to proceed normally. If the original accessory causes the failure, remove it from service.
6. Verify Mode and Control Operation
Confirm the intended Manual or AED operating mode is selected using normal user-accessible controls.
Verify that charge, arm, and shock controls respond normally during an approved test sequence.
Do not enter restricted service modes.
Expected outcome: Controls respond predictably and the unit advances through the expected therapy sequence.
7. Test With an Approved Defibrillator Analyzer
Remove the unit from clinical use and connect an approved defibrillator analyzer according to facility and manufacturer procedures.
Perform the applicable functional shock-delivery test without connecting the device to a patient.
Expected outcome: The device charges and discharges appropriately into the analyzer and passes required functional verification. If so, troubleshooting can stop.
8. Verify Both Applicable Therapy Workflows
If the unit supports both Manual and AED operation in the local configuration, verify the previously reported mode and any additional mode required by facility return-to-service procedures.
Expected outcome: Therapy operation is reliable and repeatable with no unexpected interruption.
If the Problem Persists
External therapy accessories, connections, power conditions, and normal controls have been ruled out. The remaining fault may involve internal charging, discharge, control, sensing, or therapy circuitry.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
- Evaluated using appropriate manufacturer documentation and an approved defibrillator analyzer.
- Repaired only by qualified personnel.
Do not attempt internal high-voltage or board-level repair without authorized procedures. Complete all required therapy-output, alarm, operational, and electrical-safety testing before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Any uncertainty about shock delivery requires immediate substitution with another verified defibrillator; monitoring capability alone does not make the unit safe for emergency use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the DEFIGARD Touch 7 would not charge for defibrillation when therapy pads were connected."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that the therapy cable was not fully seated and the pads were therefore not being recognized."
Resolution
What action was taken.
Example:
"Fully connected the therapy cable and verified successful charging and shock delivery into an approved defibrillator analyzer."
Helpful Details to Include (If Known)
- Manual or AED mode involved.
- Exact displayed message.
- Battery and AC status.
- Pad or paddle type used.
- Therapy cable condition.
- Known-good accessory results.
- Whether charging begins.
- Whether the unit arms.
- Analyzer test result.
- Final device status.
Final Thought
Shock-delivery failures require immediate protection of the patient and a controlled progression from power and accessory checks to analyzer verification. If reliable therapy cannot be confirmed, remove the unit from service and escalate with complete CCR documentation.
That is successful troubleshooting.