OXIMETER PROBE OFF INDICATOR DEFINING PROBE OFF SPACE

• US 20130006076A1
• Filed: 09/11/2012
• Published: 01/03/2013
• Est. Priority Date: 10/12/2006
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: McHale, Ryan Timothy, Weber, Walter M.
• Granted Patent: US 9,370,326 B2
• Time in Patent Office: Days
• US Class Current: 600/323
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 2560/0456 Apparatus provided with a docking unit
• CPC Class Codes: A61B 2560/0475 Special features of memory means, e.g. removable memory cards
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6832 using adhesives A61B5/259 takes precedence
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/684 Indicating the position of the sensor on the body
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 5/7405 using sound
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/7445 Display arrangements, e.g. multiple display units
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B

Abstract

An embodiment of the present disclosure seeks to select characteristics of incoming intensity data that cause comparisons of selected characteristics to produce defined probe off space having reduced crossover with defined probe on space. Once defined, the present disclosure compares characteristics of incoming intensity data with the now defined probe off space, and in some embodiments, defined probe on space, to determine whether a probe off condition exists. When a processor determines a probe off condition exists, the processor may output or trigger an output signal that audibly and/or visually indicates to a user that the optical sensor should be adjusted for a proper application to a measurement site.

Claims

1. A method of determining that an optical probe is not properly positioned with respect to a measurement site on a patient, the method comprising:

receiving probe off data responsive to signals normally responsive to light attenuated by body tissue at said measurement site of said patient, however, said signals being received during known probe off conditions;

defining a probe off space from analysis of said probe off data, said probe off space being multi-dimensional and separate from multi-dimensional data space representing valid parameter data; and

storing data representative of said probe off space on memory of one of a patient monitor and a noninvasive oximeter sensor.

2. The method of claim 1, comprising increasing said multi-dimensions to increase separation between said probe off space and valid parameter data space.

3. The method of claim 1, wherein said data received comprises probe off data received during clinical trials.

4. The method of claim 1, wherein said defining a probe off space comprises performing mathematical modeling.

5. The method of claim 1, comprising storing data representative of probe on space on said memory.

6. The method of claim 5, comprising increasing said multi-dimensions to increase separation between said probe off space and said probe on space.

7. A patient monitor comprising:

an input receiving data responsive to light attenuated by body tissue, wherein the light comprises light emitted at at least two of emission centroids ranging from about 605 nm to about 614 nm, from about 615 nm to about 624 nm, from about 625 nm to about 635 nm, from about 655 nm to about 665 nm, from about 690 nm to about 710 nm, from about 720 nm to about 740 nm, from about 785 nm to about 825 nm, and from 875 nm to about 935 nm;

a memory storing probe off data corresponding to probe off space, wherein at least some of said probe off space corresponds to data acquired during known probe off conditions; and

a processor programmed to compare incoming data with the probe off data to determine an occurrence of a probe off condition, and programmed to output a probe off indication upon determination of said occurrence.

8. The patient monitor of claim 7, wherein said centroids comprise at two of centroids at at about 610, about 620, about 630, about 660, about 700, about 730, about 800 and about 905 nm.

9. The patient monitor of claim 7, wherein said probe off space comprises a multi-dimensional probe off space.

10. The patient monitor of claim 9, wherein said multi-dimensional probe off space includes data responsive to wavelengths of approximately 610 nm and approximately 630 nm.

11. The patient monitor of claim 9, wherein said multi-dimensional probe off space includes data responsive to wavelengths of approximately 610 nm, 620 nm and approximately 630 nm.

12. The patient monitor of claim 7, wherein the memory stores probe on data corresponding to probe on space, wherein at least some of said probe on space corresponds to data acquired during known probe on conditions;

and wherein said processor is programmed to compare incoming data with the probe on data to determine said occurrence of said probe off condition.