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What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting Corometrics fetal monitors that produce paper recorder or printout errors. Common issues include no printout, incomplete strips, faded or smeared traces, or paper jams. Most often, these problems are caused by external factors such as paper loading, recorder settings, or environmental conditions rather than internal electronics.
Step-by-Step Troubleshooting
Verify Power and Recorder Readiness
- Ensure the monitor and recorder are powered on.
- Check that the recorder is in “ready” mode for printing.
- Why it matters: Some errors occur if the recorder is powered but not properly initialized.
Check Paper Supply
- Confirm the paper roll is present, correctly oriented, and not expired or damp.
- Replace the paper roll if it is near its end, crumpled, or damaged.
- Why it matters: Paper misfeeds are the most common cause of printout issues.
Inspect Paper Path for Obstructions
- Open the recorder cover and check for torn paper, foreign objects, or jammed sections.
- Remove debris carefully.
- Why it matters: Even small obstructions can prevent smooth paper feed or cause streaks.
Check Paper Settings and Recorder Mode
- Ensure correct paper speed and print mode are selected.
- Verify that the appropriate channel is enabled for printing (FHR, MHR, TOCO, etc.).
- Why it matters: Incorrect settings may produce missing or skewed traces.
Examine Thermal Print Mechanism
- Inspect the thermal head for dust, residue, or damage.
- Clean gently with recommended cleaning wipes if applicable.
- Why it matters: Dirty or damaged thermal heads can produce faint or incomplete printouts.
Test Recorder with a Known Signal
- Use a self-test mode or simulated signal to verify the recorder prints correctly.
- Why it matters: Confirms whether the issue is paper/recorder-related or signal-related.
If the Problem Persists
If external checks do not resolve the issue, the internal recorder electronics or thermal printhead may be failing.
- Device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to escalate is proper troubleshooting and ensures patient safety.
Clinical Use Tip
- Do not rely on faulty printouts for patient monitoring.
- Ensure real-time FHR and MHR display is verified before continuing care.
- Move the patient to another functional monitor if needed.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Paper recorder produces incomplete or blank printouts during monitoring.”
Cause
What was observed during troubleshooting.
Example:
“Paper misfeed, jam, or thermal head contamination observed during troubleshooting.”
Resolution
What action was taken.
Example:
“Paper replaced, path cleared, and thermal head cleaned; test print verified functionality.”
Helpful Details to Include
- Paper roll condition and expiration
- Recorder self-test results
- Any abnormal sounds during paper feed
- Final print quality after correction
Final Thought
Troubleshooting printout errors starts with simple, external checks. Documenting the process and knowing when to escalate protects patient safety and maintains reliable monitoring. Properly following steps prevents wasted time and ensures accurate data recording.
That is successful troubleshooting.