Method of monitoring the dry cleaning progress of a transcutaneous sensor

• US 10,215,729 B2
• Filed: 09/06/2016
• Issued: 02/26/2019
• Est. Priority Date: 09/07/2015
• Status: Active Grant

• Current Assignee: Radiometer Basel AG (Danaher Corporation)
• Original Assignee: Radiometer Basel AG (Danaher Corporation)
• Inventors: Krayss, Florian, Vogt, Hansruedi, Liechty, Dominik, Bochud, Christian
• Primary Examiner(s): Blan, Nicole
• Application Number:
  US15/257,553
• Publication Number:
  US 20170067851A1
• Time in Patent Office: 903 Days
• Field of Search: None
• CPC Class Codes: A61B 2562/245 Means for cleaning the sensor in-situ or during use, e.g. hygienic wipes
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/1477 non-invasive
• CPC Class Codes: B08B 1/143 Wipes
• CPC Class Codes: G01N 27/4163 checking the operation of, or calibrating, the measuring apparatus G01N27/3274, G01N27/4175 and G01N33/0006 take precedence

Abstract

The proposed invention provides a method of monitoring the dry cleaning progress of a transcutaneous sensor having an electrode for measuring pCO₂ and an electrode for measuring pO₂, both electrodes opening into a measuring surface of the sensor. The method comprises receiving an AC signal from the pCO₂ electrode, initiating a cleaning of the sensor, and monitoring the cleaning progress by analyzing AC signals subsequently received from the pCO₂ electrode.

Claims

1. A method of monitoring a dry cleaning progress of a transcutaneous sensor comprising an electrode for measuring pCO₂ and an electrode for measuring pO₂, both electrodes opening into a measuring surface of the sensor, the method comprising:

initiating a cleaning of the sensor,

receiving an signal from the pCO₂ electrode in response to the initiating the cleaning of the sensor,

monitoring the dry cleaning progress by analyzing AC signals subsequently received from the pCO₂ electrode, and

informing a user of a status of the dry cleaning progress.

2. The method according to claim 1, wherein initiating the cleaning of the sensor comprises a user manually starting the cleaning.

3. The method according to claim 1, wherein initiating the cleaning of the sensor comprises determining that an AC signal created at the pCO₂ electrode is a cleaning signal.

4. The method according to claim 1, wherein the AC signals received from initiating the cleaning provide a signal function f(t).

5. The method according to claim 4, wherein the cleaning progress is determined by analysis of derivatives of the signal function f(t).

6. The method according to claim 5, wherein the analysis comprises analysis of first and/or second derivatives of the signal function f(t).

7. The method according to claim 1, wherein the dry cleaning progress is determined in cleaning intervals, each interval being generated when a predetermined criterion has been met.

8. The method according to claim 7, wherein the sensor is determined to be sufficiently cleaned when a predetermined number of intervals have been performed.

9. The method according to claim 1, wherein the information to the user is provided by a monitor connected to the sensor.

10. The method according to claim 9, wherein the monitor is kept in a cleaning mode as long as the sensor shall be cleaned.

11. A monitor for monitoring signals measured by a transcutaneous sensor comprising an electrode for measuring pCO₂ and an electrode for measuring pO2, both electrodes opening into a measuring surface of the sensor, the monitor being adapted to monitor a cleaning progress of said transcutaneous sensor by:

receiving an input initiating a cleaning of the sensor,

receiving an AC signal from the pCO₂ electrode in response to the receiving the input initiating the cleaning of the sensor,

monitoring the cleaning progress by analyzing AC signals subsequently received from the pCO₂ electrode, and

informing a user of a status of the cleaning progress.

12. The monitor according to claim 11, wherein the monitor is adapted for receiving input from a user and initiating the cleaning of the sensor comprises a user manually starting the cleaning by providing input to the monitor.

13. The monitor according to claim 12, herein the monitor is kept in a cleaning mode as long as the sensor is being cleaned.

14. The monitor according to claim 12, wherein the user is informed of the cleaning progress based on a number of cleaning intervals, each interval being generated when a predetermined criterion has been met.

15. The monitor according to claim 11, wherein the monitor is kept in a cleaning mode as long as the sensor is being cleaned.

16. The monitor according to claim 15, wherein the user is informed of the cleaning progress based on a number of cleaning intervals, each interval being generated when a predetermined criterion has been met.

17. The monitor according to claim 11, wherein the user is informed of the cleaning progress based on a number of cleaning intervals, each interval being generated when a predetermined criterion has been met.