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What This Guide Helps With
Identifies external causes of compression paddle sensor or positioning errors preventing proper compression, including alignment, obstructions, or accessory issues.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- Confirm no patient is in compression and the paddle is fully released.
- If a patient is present, safely remove them and move to another unit.
Why: Prevents injury from unintended compression movement.
2. Observe Error Message and System Behavior
- Note specific error messages related to paddle position or sensor faults.
- Attempt small paddle movements using controls.
Expected Outcome:
- No movement → possible interlock or sensor issue
- Partial/intermittent movement → alignment or obstruction issue
Why: Helps determine if the issue is mechanical, sensor-related, or control-related.
3. Verify Paddle Installation and Type
- Remove and reseat the compression paddle.
- Ensure it is fully seated and locked into place.
- Ensure correct paddle type for the exam.
Expected Outcome:
Properly seated paddle clears positioning errors.
Why: Misaligned or incompatible paddles can prevent sensor recognition.
4. Inspect Paddle Mount and Sensor Area
- Check the paddle holder and sensor interface for debris or dust.
- Inspect for bent or damaged mounting hardware.
- Check for misalignment.
- Clean if needed using approved methods.
Expected Outcome:
Clearing contamination or correcting alignment restores sensor detection.
Why: Sensors rely on proper physical alignment and clean contact surfaces.
5. Check for Physical Obstructions
- Inspect around the compression assembly for cables or tubing.
- Check for accessories or positioning aids.
- Look for foreign objects in the track or mechanism.
- Remove any obstruction.
Expected Outcome:
Paddle moves freely without restriction.
Why: Obstructions can trigger position errors or prevent full travel.
6. Verify Compression Motion and Limits
- Attempt full range compression movement (without a patient).
- Observe for smooth travel, sudden stops, or inconsistent position readings.
Expected Outcome:
Smooth, consistent motion with accurate position feedback.
Why: Irregular motion may indicate sensor misreads or mechanical binding.
7. Perform System Reset / Reinitialization
- Restart the system using proper shutdown procedure.
Expected Outcome:
Temporary sensor or positioning faults may clear after reboot.
Why: Resets system communication and reinitializes position sensors.
8. Check Interlocks and System Readiness
- Verify all system interlocks are satisfied (doors closed, no active faults).
- Confirm system shows “Ready” status.
Expected Outcome:
System allows normal paddle movement and positioning.
Why: Interlocks can disable motion and mimic sensor faults.
If the Problem Persists
If all external causes have been ruled out, the issue is likely due to internal components such as paddle position sensors, wiring, or control circuitry.
Remove the system from service, label it Out of Service, and send for repair or further bench evaluation.
Clinical Use Tip
Never troubleshoot compression issues with a patient present. Always move the patient to another unit before testing paddle movement or sensor function.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Compression paddle not recognized and unable to position for exam."
Cause
What was observed during troubleshooting.
Example:
"Compression paddle not fully seated and debris present in paddle sensor interface."
Resolution
What action was taken.
Example:
"Reseated paddle, cleaned sensor area, and verified normal compression operation."
Helpful Details to Include (If Known)
- Paddle type verified and reseated
- Sensor area inspected and cleaned
- Motion tested through full range
- No obstructions found
- System reboot performed
- Final status: Fully operational or removed from service
Final Thought
Compression paddle issues are often caused by alignment, installation, or obstruction problems rather than true sensor failure. A structured approach ensures patient safety, avoids unnecessary downtime, and supports accurate escalation when needed.
That is successful troubleshooting.