Stryker LIFEPAK CR2

Adult or Pediatric Mode Selection Failure

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Asset Type

Defibrillator

Manufacturer

Stryker

Model

LIFEPAK CR2

What This Guide Helps With

Troubleshooting failure to enter, indicate, maintain, or return from Child Mode due to operation, button access, contamination, power, or control faults.

Step-by-Step Troubleshooting

1. Ensure Patient Safety First

Do not perform extended mode-selection troubleshooting while the LIFEPAK CR2 is being relied upon during an active resuscitation.

If the required adult or pediatric operating mode cannot be confidently selected, immediately provide another verified defibrillator/AED and follow facility emergency-response procedures.

Expected: Patient care is transferred to equipment with confirmed operating readiness and appropriate therapy capability.

Why it matters: On the LIFEPAK CR2, the CHILD MODE button changes therapy to reduced energy levels and adjusts CPR coaching for pediatric use. An uncertain mode-selection condition can therefore affect therapy configuration.

If patient care has been transferred safely, continue troubleshooting only in a controlled Clinical Engineering setting.

2. Confirm the Exact Failure Behavior

Power on the LIFEPAK CR2 in a controlled environment and determine exactly what is occurring.

Check whether:

Expected: The complaint is narrowed to a reproducible mode-selection, user-interface, power, or broader device fault.

Why it matters: Stryker documents that pressing the CHILD MODE button switches between adult and child operation; pressing it again returns the unit to Adult Mode.

If normal switching is confirmed repeatedly, the original complaint may have involved operation, timing, or an intermittent condition. Document findings and continue readiness verification before return to service.

3. Verify Correct Mode-Selection Operation

Using the approved operating instructions and without connecting the unit to a patient, operate the LIFEPAK CR2 and press the CHILD MODE button as intended.

Observe for the expected mode-change response.

Then press the button again and confirm return to Adult Mode.

Expected: The device consistently changes to Child Mode and then back to Adult Mode.

Why it matters: The LIFEPAK CR2 uses a dedicated CHILD MODE button rather than requiring separate pediatric electrodes for mode selection. Stryker identifies the CR2 QUIK-STEP electrodes as usable for adult and pediatric patients.

If correct mode switching is restored and remains repeatable, stop troubleshooting and complete required functional/readiness checks before return to service.

4. Check for External Button Obstruction or Contamination

Inspect the CHILD MODE button and surrounding housing.

Look for:

Clean only according to approved facility and manufacturer-compatible procedures.

Do not flood the control area with liquid or force tools around the button.

Expected: The button surface is clean, unobstructed, intact, and mechanically usable from the exterior.

If cleaning removes an obstruction and normal mode switching returns consistently, stop troubleshooting after completing readiness checks.

5. Compare Button Response With Other Device Functions

Observe whether the LIFEPAK CR2 otherwise starts and operates normally.

Check for:

Expected: Clinical Engineering determines whether the failure is isolated to mode selection or part of a broader user-interface or device-control problem.

Why it matters: Multiple abnormal controls or startup behaviors make an isolated external CHILD MODE button issue less likely.

If broader abnormal operation is present, remove the device from service and escalate for evaluation.

6. Check Battery and General Power Condition

Inspect the installed battery condition and confirm the device shows no obvious evidence of unstable power.

Look for:

Reseat or replace the battery only when permitted by facility procedure and with the correct approved component.

Expected: The unit powers consistently without resets, dropouts, or abnormal battery indications.

If correcting an external battery seating or known battery condition restores reliable mode selection, stop troubleshooting after completing required readiness verification.

7. Inspect the Device for Physical Damage

Examine the LIFEPAK CR2 exterior for evidence of:

Expected: No physical condition is present that could compromise mode selection or device reliability.

If physical damage is found near the control interface, do not continue repeated operational testing as a substitute for repair evaluation.

Remove the unit from service.

8. Repeat the Mode-Selection Test

With the device in a controlled Clinical Engineering environment, repeat the Adult-to-Child and Child-to-Adult selection sequence several times.

Confirm that:

Expected: Mode selection is repeatable and dependable.

If the failure occurs even once during controlled repeat testing, treat the issue as intermittent and unresolved. Do not return the AED to service based on temporary recovery.

9. Compare With a Known-Good LIFEPAK CR2 When Available

If facility inventory permits, compare the affected unit with another verified LIFEPAK CR2.

Compare:

Do not use the comparison unit as justification to alter internal adjustments.

Expected: Clinical Engineering determines whether the affected device behaves abnormally relative to a known-good unit.

If the affected unit remains inconsistent, stop troubleshooting and escalate.

10. Complete Final Readiness Verification

If the issue appears resolved, complete the facility-approved post-service readiness and functional checks appropriate for the LIFEPAK CR2.

Confirm:

Expected: The LIFEPAK CR2 is fully ready for service, not merely temporarily responsive.

If readiness cannot be confirmed, remove the device from service.

If the Problem Persists

If the CHILD MODE button still does not respond reliably, the unit cannot consistently return to Adult Mode, or mode indication remains uncertain after external checks, common external causes have been ruled out.

The problem may involve an internal control, button-interface, user-interface, or related electronic fault.

The device should be:

Do not open the housing or attempt board-level repair as part of routine field troubleshooting unless specifically authorized, trained, and supported by approved service documentation.

Knowing when to stop is proper troubleshooting. An AED with uncertain adult/pediatric mode selection should not be returned to emergency readiness based on intermittent operation.

Clinical Use Tip

Do not troubleshoot mode-selection reliability during an active resuscitation.

If the LIFEPAK CR2 cannot be confidently placed into the required operating mode, move immediately to another verified defibrillator/AED and continue troubleshooting the affected unit only after patient care is secured.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Clinical staff reported the LIFEPAK CR2 would not reliably switch from Adult Mode to Child Mode when the CHILD MODE button was pressed."

Cause

What was observed during troubleshooting.

Example:
"Clinical Engineering reproduced intermittent CHILD MODE button response after confirming normal startup, acceptable battery condition, and no external obstruction around the control."

Resolution

What action was taken.

Example:
"Removed the LIFEPAK CR2 from service, labeled it Out of Service, and routed the unit for repair evaluation due to unreliable adult/pediatric mode selection."

Helpful Details to Include (If Known)

Final Thought

Adult and pediatric mode selection directly affects confidence in emergency therapy configuration. Start with patient safety, verify the exact behavior, rule out external causes logically, and escalate any unreliable or intermittent control condition. Clear CCR documentation preserves both the technical findings and the reason for the final service decision.

That is successful troubleshooting.

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