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Asset Type
Electrocardiograph (EKG) Machine
Manufacturer
Model
What This Guide Helps With
Troubleshooting missing 12SL analysis or interpretation caused by lead quality, patient data, acquisition mode, settings, licensing, or software problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Clinical Decision-Making
Do not delay clinical evaluation of a symptomatic patient while troubleshooting automated ECG interpretation.
Provide the ECG waveform to a qualified clinician for direct review.
Repeat the ECG on another verified device when clinically necessary.
Treat automated interpretation as decision support, not a replacement for clinician assessment.
Do not assume a normal tracing because no interpretation printed.
Expected outcome: Clinical care continues without depending on unavailable automated analysis.
2. Confirm the Exact Analysis Failure
Determine whether:
- No interpretation appears on the screen or printout.
- Measurements appear but interpretive statements do not.
- Analysis fails only for certain patients.
- The ECG is marked as poor quality.
- The issue began after a configuration or software change.
- The waveform itself is complete and readable.
Expected outcome: The problem is identified as missing measurements, missing statements, poor-quality rejection, or configuration-related behavior.
3. Inspect Electrode Placement and Skin Preparation
Confirm that clinical staff used the approved 12-lead placement.
Check for:
- Incorrect limb or precordial lead placement
- Loose electrodes
- Dried or expired electrodes
- Hair, lotion, moisture, or poor skin contact
- Excessive cable tension
- Lead-wire reversal
- Clinical staff should correct patient preparation and electrode placement.
Expected outcome: All electrodes make stable contact and the displayed lead configuration is clinically appropriate.
4. Evaluate Signal Quality
Observe the ECG waveform for:
- Baseline wander
- Muscle artifact
- Electrical interference
- Flat or missing leads
- Excessive noise
- Lead-off indications
- Pacemaker spikes or rhythm conditions that may affect analysis
- Reacquire the ECG only after improving signal quality.
Expected outcome: A complete, stable, low-artifact 12-lead tracing is available for analysis.
5. Verify Patient Demographic Entry
Confirm required patient information is entered accurately.
Review:
- Patient age or date of birth
- Sex or other required demographic fields
- Patient ID
- Acquisition type or patient category
- Do not enter fabricated demographic values to force an interpretation.
Expected outcome: Required patient information is present and accurately associated with the ECG.
6. Confirm the Correct Acquisition Mode
Verify the ECG was acquired using the intended resting 12-lead workflow.
Confirm all required leads are present.
Ensure the device is not in a rhythm-only, preview, or other workflow that may not produce the expected analysis.
Confirm the ECG acquisition completed rather than being stopped early.
Expected outcome: A completed diagnostic 12-lead ECG is available for analysis.
7. Review Normal User-Accessible Print and Analysis Options
Check whether the selected report format is configured to display measurements or interpretation.
Confirm the interpretation is not merely omitted from the chosen print format.
Review the on-screen record as well as the printed copy.
Do not change licensed features or restricted analysis configuration.
Expected outcome: Existing analysis is found in the record or the correct report format displays it.
8. Test With an ECG Simulator
Disconnect the patient and connect an approved ECG simulator.
Use a stable standard simulated rhythm.
Acquire a complete 12-lead ECG.
Observe whether measurements and interpretation are generated.
Do not use simulator results to judge clinical accuracy beyond functional operation.
Expected outcome: The device generates expected analysis output from a stable simulated signal. If successful, the original issue was likely signal, lead placement, or patient-workflow related.
9. Compare With Another MAC 5500 HD
When available:
- Use the same approved simulator and equivalent acquisition workflow.
- Compare whether another unit generates analysis.
- Confirm the affected unit has the expected analysis capability and approved configuration.
Expected outcome: A device-specific failure or broader configuration expectation is identified.
10. Restart and Retest
When no patient record is active:
- Shut down the device normally.
- Restart it.
- Repeat the simulator acquisition.
- Verify the analysis appears consistently.
Expected outcome: The analysis function returns after restart and remains stable.
11. Perform Final Functional Verification
After correction:
- Acquire a clean simulator ECG.
- Confirm all 12 leads display.
- Confirm measurements and applicable interpretive output are generated.
- Verify the information appears in the saved record and intended report.
- Confirm printing and transmission do not remove or alter the expected analysis section.
Expected outcome: The device consistently generates and preserves the expected 12SL analysis output. The unit may be returned to service.
If the Problem Persists
Lead quality, demographics, acquisition mode, report format, restart, and simulator input causes have been ruled out. The remaining possibilities may include disabled or unavailable analysis configuration, licensing issue, software corruption, internal processing fault, or another service-level problem.
The device should be:
- Removed from service if the expected analysis function is required by the clinical workflow
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate GE Healthcare documentation and approved test equipment
- Repaired or configured only by qualified personnel
- Do not use unauthorized service menus or alter clinical interpretation configuration without approval. Return the device to service only after repeatable analysis from a stable simulator signal is verified.
- Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
A missing automated interpretation must never prevent immediate clinician review of the actual ECG waveform.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the MAC 5500 HD printed the ECG waveform but did not generate 12SL interpretation text."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found significant artifact and one intermittently disconnected precordial lead during acquisition."
Resolution
What action was taken.
Example:
"Clinical Engineering corrected the lead connection, repeated testing with an ECG simulator, and verified complete 12-lead acquisition with measurements and interpretation."
Helpful Details to Include (If Known)
- Whether measurements or statements were missing
- Lead-off or artifact status
- Electrode and cable condition
- Patient demographic fields entered
- Acquisition mode used
- Report format selected
- Simulator test result
- Comparison-device result
- Saved, printed, and transmitted output
- Final device disposition
Final Thought
Keep clinical interpretation with the clinician, verify signal quality and acquisition conditions first, use a simulator to separate patient setup from device failure, and escalate configuration or software problems appropriately.
That is successful troubleshooting.