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What This Guide Helps With
This guide helps troubleshoot the No breath xxx seconds alarm on a Medtronic Capnostream 20p capnography monitor. This alarm indicates that no valid breath has been detected for the displayed number of seconds.
This condition may be caused by a real patient breathing issue, airway problem, disconnected sampling line, poor patient interface placement, blocked CO₂ accessory, incorrect setup, or a device-side CO₂ sampling problem. This alarm must be treated as a patient safety alarm first.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Treat this as a patient safety alarm before assuming equipment failure.
- Immediately notify clinical staff and confirm the patient is being assessed.
- Do not silence, ignore, or dismiss the alarm until the patient’s breathing status has been confirmed.
- If the patient is not breathing, has poor ventilation, or has a compromised airway, stop equipment troubleshooting and support the clinical response according to facility policy.
Verify the Reported Alarm and Behavior
- Confirm the monitor displays No breath xxx seconds.
- Note how long the displayed timer has been running.
- Observe whether the alarm occurs continuously, intermittently, during transport, after sensor or sampling line changes, after patient movement, or after repositioning.
- Check whether the capnogram waveform is absent, flat, intermittent, or unstable.
Confirm Clinical Response Before Equipment Checks
- Verify that clinical staff have assessed whether the patient is breathing normally.
- Confirm whether the alarm is related to apnea, airway obstruction, respiratory depression, disconnection from ventilation, or another clinical cause.
- If the alarm is patient-condition related, document the clinical response and do not continue equipment troubleshooting unless requested and safe to do so.
Check the CO₂ Sampling Line and Airway Connection
- Inspect the CO₂ sampling line, cannula, airway adapter, or breathing circuit connection.
- Look for disconnection, loose fittings, kinks, blockage, moisture, secretions, incorrect placement, or a sampling line pulled away from the patient.
- Confirm the sampling path is connected, clear, and properly positioned.
- The monitor can only detect breaths if exhaled CO₂ reaches the device.
Check the Patient Interface Placement
- For nasal or oral cannulas, confirm the cannula is properly positioned at the nares and mouth area as clinically appropriate.
- For intubated or ventilated patients, confirm the airway adapter is installed correctly in the breathing circuit.
- Check that the airway adapter is not bypassed, cracked, loose, or disconnected.
- If correcting the interface restores the waveform and EtCO₂ value, verify the alarm clears before returning the monitor to normal use.
Verify the Capnogram Waveform and EtCO₂ Reading
- Look for a consistent CO₂ waveform with each breath.
- Confirm whether a reasonable EtCO₂ value is displayed after the patient and sampling setup are verified.
- A missing or flat waveform may indicate no sampled breath, poor accessory placement, a blocked sampling path, or a device-side sampling issue.
- The waveform is often the fastest way to confirm whether ventilation is being detected.
Replace the Sampling Line or CO₂ Accessory
- If placement appears correct but no valid waveform is present, replace the sampling line, cannula, or airway adapter with a known-good compatible accessory.
- Check for wet, blocked, damaged, contaminated, or incorrect accessories.
- After replacement, confirm that breath detection, waveform, EtCO₂ readings, and alarm behavior return to normal.
Check the Monitor-Side Connection
- Confirm the sampling line is fully seated at the monitor connection.
- Inspect the inlet area for visible contamination, broken connector parts, moisture, or signs of damage.
- Do not insert tools or attempt internal cleaning beyond approved external procedures.
- A poor connection can prevent the monitor from drawing or reading the gas sample properly.
Check Alarm Settings and Patient Configuration
- Confirm the no-breath or apnea alarm setting is appropriate for the patient type and clinical area.
- Verify adult, pediatric, or neonatal configuration as applicable.
- Check whether the alarm delay or related patient configuration was changed.
- Do not adjust alarm settings to hide or delay a real patient safety issue.
Isolate Accessory or Patient Setup from Device Failure
- After the patient is safe, test the monitor with a known-good sampling line and appropriate department-approved test setup.
- If the monitor detects breaths or simulated CO₂ normally with known-good accessories, the issue was likely related to the patient interface, sampling line, connection, or clinical condition.
- If the monitor still fails to detect valid breaths with a known-good setup, suspect a device-side sampling, pump, sensor, connector, or internal CO₂ measurement problem.
Stop When Resolved
- If the alarm clears after correcting patient condition, accessory placement, sampling line condition, monitor connection, or configuration, confirm stable CO₂ waveform and alarm behavior.
- Document the correction and final device status.
- Return the monitor to service only when it operates normally and patient monitoring is safe.
If the Problem Persists
If the patient has been assessed, the sampling line and patient interface are correct, compatible accessories have been replaced, the monitor connection is secure, and the Capnostream 20p still displays No breath xxx seconds, external and common causes have been ruled out.
Persistent no-breath detection despite a valid setup may indicate an internal sampling, pump, sensor, connector, or CO₂ measurement problem.
Remove the monitor from service, label it Out of Service, and send it for repair or bench evaluation.
Clinical Use Tip
Never troubleshoot this alarm on an active patient as if it is only an equipment issue. A No breath alarm can represent apnea, airway obstruction, respiratory depression, or ventilation failure.
Move the patient to a backup monitor or alternate monitoring method first if the device cannot be trusted or if troubleshooting could interrupt patient monitoring.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Capnostream 20p displayed No breath xxx seconds alarm and staff reported no valid breath was being detected by the monitor."
Cause
What was observed during troubleshooting.
Example:
"Patient safety alarm verified. Clinical staff assessed patient. CO₂ sampling line and patient interface were checked for disconnection, blockage, moisture, poor placement, or accessory failure."
Resolution
What action was taken.
Example:
"Replaced sampling line and confirmed stable CO₂ waveform, EtCO₂ reading, and cleared alarm. Monitor returned to service after normal operation was verified."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
The No breath xxx seconds alarm must be treated as a patient safety alarm before it is treated as a device problem. Confirm the patient, verify the sampling path, check the waveform, replace simple accessories, and escalate the monitor only after external causes are ruled out.
Good troubleshooting protects the patient, avoids unnecessary repair work, and creates a clear service history for the device.
That is successful troubleshooting.