Jaeger Medical Vyntus Series

Asset Type

Pulmonary Function Tester

Manufacturer

Jaeger Medical

Model

Vyntus Series

What This Guide Helps With

This guide assists Clinical Engineering in troubleshooting Jaeger Medical Vyntus pulmonary function testing systems that display calibration failures, inaccurate calibration values, or flow sensor errors. These issues often occur during daily calibration or testing and may be related to external factors such as flow sensors, calibration syringes, tubing connections, environmental conditions, or software communication issues.

The goal is to rule out common external causes before determining whether the sensor or internal electronics require repair.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Do not troubleshoot pulmonary testing equipment on an active patient.
• Stop testing immediately if calibration errors occur during a procedure.
• Move the patient to another functioning pulmonary testing system before continuing testing.

Confirm the Exact Error Message

• Review the error message displayed in the Vyntus software.
• Common examples may include:
  • Calibration failed
  • Flow sensor error
  • Flow out of range
  • No flow detected
• Document the exact message, as this helps determine whether the issue is sensor-related, calibration-related, or software-related.

Verify the Calibration Syringe

• Ensure the correct 3-liter calibration syringe is being used.
• Check for:
  • Damaged plunger seals
  • Air leaks
  • Loose fittings
  • Expired or uncertified syringe
• Calibration accuracy depends on the syringe delivering an exact known volume. A leaking or worn syringe can trigger calibration failures.

Inspect the Flow Sensor

• Remove and visually inspect the flow sensor.
• Check for:
  • Moisture buildup
  • Condensation
  • Dust or debris
  • Cracked housing
  • Contamination from patient testing
• If moisture or debris is present:
  • Allow the sensor to dry completely
  • Replace disposable filters or mouthpieces
• Flow sensors are sensitive to contamination and can easily produce calibration errors if airflow is obstructed.

Check Tubing and Connections

• Inspect all tubing between the patient interface and the sensor.
• Verify:
  • Tubing is properly seated
  • No kinks or blockages
  • No disconnected hoses
  • Bacterial/viral filters are installed correctly
• Improper airflow routing can cause the system to detect inaccurate flow measurements.

Confirm Correct Sensor Selection in Software

• Ensure the Vyntus software recognizes the correct sensor type.
• Check that:
  • The correct device module is selected
  • The sensor is properly detected by the software
  • No device communication errors are present
• Restarting the software may reinitialize the sensor connection.

Verify Environmental Conditions

• Pulmonary testing systems rely on accurate environmental readings.
• Confirm:
  • Room temperature is stable
  • No extreme humidity
  • Environmental sensors are functioning
• Large environmental fluctuations can affect calibration results.

Restart the System

• Perform a full system restart.
• Steps:
  • Close the Vyntus application
  • Power down the system computer
  • Power off the Vyntus device modules
  • Restart the system and relaunch the software
• This can clear temporary communication errors between the sensor and software.

Attempt Calibration Again

• Perform a full calibration procedure.
• Ensure:
  • Smooth and steady syringe strokes
  • Full 3L volume each stroke
  • Proper timing between strokes
• Irregular calibration strokes may trigger calibration failure alarms.

If the Problem Persists

If calibration failures or flow sensor errors continue after completing these checks, common external causes have likely been ruled out.

The issue may involve:

• Failed or drifting flow sensor
• Internal sensor electronics
• Environmental sensor malfunction
• USB or internal interface board failure

At this point:

• Remove the system from service
• Label the device Out of Service
• Send the unit for repair or bench evaluation

Knowing when to stop prevents unnecessary troubleshooting and protects test accuracy.

Clinical Use Tip

Do not troubleshoot pulmonary testing equipment on an active patient.

Always stop testing and move the patient to another functioning system before beginning troubleshooting. Incorrect calibration can lead to inaccurate lung function measurements, which may impact clinical diagnosis.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
“Pulmonary lab reported that the Vyntus system failed daily calibration and displayed a flow sensor error.”

Cause

What was observed during troubleshooting.

Example:
“Inspection revealed condensation buildup inside the flow sensor and a partially obstructed bacterial filter affecting airflow.”

Resolution

What action was taken.

Example:
“Sensor dried, filter replaced, tubing verified, and calibration successfully completed. System returned to service.”

Helpful Details to Include (If Known)

• Calibration syringe condition verified
• Flow sensor inspected/cleaned
• Filters replaced
• Tubing connections checked
• Environmental conditions verified
• Calibration repeated successfully
• Final device status documented

Final Thought

Pulmonary function testing systems rely heavily on accurate airflow measurement and proper calibration. Many calibration errors originate from simple issues such as sensor contamination, tubing problems, or calibration technique. Systematically checking external components first ensures efficient troubleshooting while maintaining reliable test results and patient safety.

That is successful troubleshooting.