Note: Information provided in this section is intended for general guidance on frequently asked questions only and is subject to below disclaimer. Please refer to the Technical Manual and Service Manual for more information on Troubleshooting.
There are a couple possible causes for this problem, each with an easy solution.
Recommended corrective action(s)
Sensor loosely attached to patient
Verify that the sensor is securely attached and ensure that air gaps are eliminated between the skin and the sensor. If needed, reapply the sensor (on same or an alternate site). Consider to use the Staysite™ Adhesive (model SA-MAR) to complementary attach Multi-Site Attachment Rings if more secure sensor attachment is required, e.g. in high humidity environments, for patients who perspire profusely and/or in challenging patient motion conditions.
Sensor is applied to a measurement site that is not recommended for PCO2/PO2 monitoring
Apply sensor to a recommended measurement site with an appropriate Sensor Attachment Accessory. For instructions refer to the Quick Reference Guide for the SDMS or the Instruction Manual for the SDMS.
Excessive use of contact liquid
Remove sensor. Clean sensor and measurement site with an alcohol pad. Reapply the sensor using only one drop of contact liquid.
If this message appears while monitoring, the sensor has been dislodged or intentionally removed from the patient.
Note: Pressing the ‘ENTER Button’ while this message is displayed will terminate The ‘Sensor off patient (↲)’ alarm condition, reset the Site Timer to the selected ‘Site Time’, and – if reduced by SITE PROTECTION – reactivate sensor heating. The measurement screen will remain active.
Note: Inserting the sensor into the ‘Docking Station’ will also terminate the ‘Sensor off patient (↲)’ alarm condition.
This error can occur when the docking station is contaminated, when there is a problem with the gasket, or when the sensor is not properly positioned during calibration. This video tutorial will guide you through the steps to resolve the error message.
Sensor not properly positioned in Docking Station during last calibration.
Verify that sensor is clean and is properly placed into the holder at the inside of the Docking Station door and that the door properly closes.
Gasket of Docking Station contaminated.
Clean the Docking Station gasket with a cotton swab with 70% isopropanol. Remove any residual threads and fibers and allow to dry.
Gasket of Docking Station defective or missing
Carefully inspect the gasket and verify that it is present and well embedded in its notch. If damaged contact qualified service personnel.
Docking Station door and / or closing mechanism defective
Carefully inspect the door and the closing mechanism for mechanical or functional damage. The closing mechanism must properly lock in place. If damaged contact qualified service personnel.
Incorrect orientation of gasket in docking station.
Ensure correct orientation of gasket in docking station (beveled edge facing outward.) See image.
This message is commonly caused by a defective membrane or dried electrolyte. This video tutorial will guide you through the steps to resolve the error message.
Membrane related (defective or dried up electrolyte)
Change the membrane:
1) if it is damaged or missing, has a loose fit, or if there is trapped air or dry electrolyte under the membrane
2) sensor calibration takes almost 14 minutes or cannot be completed within 14 minutes
PCO2 electrode and/ or white PO2 sensing spot contaminated
If after having changed the sensor membrane the calibration still takes almost 14 minutes or cannot be completed within 14 minutes contact qualified service personnel to clean the sensor without membrane.
Sentec TC Sensor defective
If the problem persists the Sentec TC Sensor is defect. Replace it with a new one.
According to the V-STATS Manual: Wait to download the SDM Trend Data until successful termination of the sensor calibration (status message “Ready for Use” displays.
Note: To ensure that correction of residual PCO2 drift is possible, wait to download SDM Trend Data until the status message changes from “Calibration in progress” to “Ready for use”
Note: Ensure that in V-STATS the sub-menu ‘Measurement -> Correction of Residual PCO2 Drift’ is set to ‘Both’, to get the drift corrected PCO2 data is displayed as a blue curve in addition to the green curve of the uncorrected data. If set to ‘Off’ only the green curve representing uncorrected PCO2 data is displayed. If set to ‘On’ only the blue curve representing drift corrected PCO2 data is displayed.
Key Message: You must allow the sensor to complete a successful calibration following patient monitoring before turning off the monitor. If you turn off the monitor without calibrating the sensor, the drift corrected data will be lost and there will be no drift corrected values on your report.
Transcutaneous Monitoring Resources
Explore a variety of webinars and educational material about transcutaneous monitoring developed by technology experts and clinicians.
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