Wireless, handheld, tissue oximetry device

Patent metadata

Field	Value
Publication number	US-9398870-B2
Application number	US-201313965156-A
Country	US
Kind code	B2
Filing date	Aug 12, 2013
Priority date	May 3, 2012
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

A system includes an enclosure having a processor and a memory coupled to the processor. The enclosure includes a display coupled to the processor where the display is visible from an exterior of the enclosure; and a battery within the enclosure coupled to the processor and the display. The enclosure includes a probe tip coupled to an exterior of the enclosure. The probe tip includes first, second, and third sensor openings. A first distance between the first and second sensor openings is different than a second distance between the first and third sensor openings. The enclosure includes code stored in the memory where the code is executable by the processor, and includes code to receive first data associated with the first and second sensor openings, code to receive second data associated with the first and second sensor openings, and code to perform SRS using the first and the second data.

First claim

The invention claimed is:

1. A handheld tissue oximeter device comprising:
a housing comprising:
a processor, contained within the housing;
a memory, contained within the housing, wherein the memory is coupled to the processor;
a display, coupled to the processor, wherein the display is visible from an exterior of the housing;
a battery, contained within the housing, coupled to and supplies power to the processor, memory, and the display; and
a tip portion of the housing;
a sensor module, coupled to the processor, wherein the sensor module comprises a probe face that is retained by the tip portion of the housing at a relatively fixed position with respect to the housing and that is placed against and faces tissue to be measured, and the probe face comprises:
a first source structure and a second source structure, formed on the probe face;
a first detector structure, formed on the probe face, wherein a first distance is from the first detector structure to the first source structure, a second distance is from the first detector structure to the second source structure, and the first distance is greater than the second distance;
a second detector structure, formed on the probe face, wherein a third distance is from the second detector structure to the first source structure, a fourth distance is from the second detector structure to the second source structure, and the fourth distance is greater than the third distance, and
the first distance is the same as the fourth distance, and the second distance is the same as the third distance;
a third detector structure, formed on the probe face, wherein a fifth distance is from the third detector structure to the first source structure, a sixth distance is from the third detector structure to the second source structure, the fifth distance is different from the first distance and the second distance, and the sixth distance is different from the first distance and the second distance; and
a fourth detector structure, formed on the probe face, wherein a seventh distance is from the fourth detector structure to the first source structure, an eighth distance is from the fourth detector structure to the second source structure, the seventh distance is different from the first, second, fifth, and sixth distances, and the eighth distance is different from the first, second, fifth, and sixth distances,
the first distance is greater than the second, third, fifth, sixth, seventh, and eighth distances, and the second distance is less than the fifth, sixth, seventh, and eight distances, and
the processor is adapted to collect first information from the first detector structure in response to radiation emitted from the first source structure, the processor is adapted to collect second information from the second detector structure in response to radiation emitted from the first source structure, the first information is reflective of the tissue to be measured at a first depth below a surface of the tissue, the second information is reflective of the tissue to be measured at a second depth below the surface of the tissue, and the second depth is less than the first depth.

2. The device of claim 1 wherein the tissue to be measured at the first depth is above a subcutaneous fat layer and muscle layer that are below the surface of the tissue.

3. The device of claim 1 wherein the processor is adapted to collect third information from the third detector structure in response to radiation emitted from the first source structure, the processor is adapted to collect fourth information from the fourth detector structure in response to radiation emitted from the first source structure, the third information is reflective of the tissue to be measured at a third depth below the surface of the tissue, the fourth information is reflective of the tissue to be measured at a fourth depth below the surface of the tissue, and the third and fourth depths are between the first and second depths.

4. The device of claim 1 wherein the processor is adapted to collect third information from the third detector structure in response to radiation emitted from the second source structure, the processor is adapted to collect fourth information from the fourth detector structure in response to radiation emitted from the second source structure, the third information is reflective of the tissue to be measured at a third depth below the surface of the tissue, the fourth information is reflective of the tissue to be measured at a fourth depth below the surface of the tissue, and the third and fourth depths are between the first and second depths.

5. The device of claim 1 wherein the sensor module comprises:
a first source diode and a second source diode;
a first optical fiber, coupled between the first source structure and the first source diode; and
a second optical fiber, coupled between the second source structure and the second source diode.

6. The device of claim 5 wherein the first detector structure comprises a first photodetector positioned on the probe face, the second detector structure comprises a second photodetector positioned on the probe face, third detector structure comprises a third photodetector positioned on the probe face, and fourth detector structure comprises a fourth photodetector positioned on the probe face.

7. The device of claim 5 wherein the sensor module comprises:
a first photodetector, a second photodetector, a third photodetector, and a fourth photodetector;
a first waveguide, coupled between the first detector structure and the first photodetector;
a second waveguide, coupled between the second detector structure and the second photodetector;
a third waveguide, coupled between the third detector structure and the third photodetector; and
a fourth waveguide, coupled between the fourth detector structure and the fourth photodetector.

8. The device of claim 1 wherein the first source structure comprises a first source diode, and the second source structure comprises a second source diode.

9. The device of claim 1 wherein the sensor module comprises:
a first photodetector, a second photodetector, a third photodetector, and a fourth photodetector;
a first waveguide, coupled between the first detector structure and the first photodetector;
a second waveguide, coupled between the second detector structure and the second photodetector;
a third waveguide, coupled between the third detector structure and the third photodetector; and
a fourth waveguide, coupled between the fourth detector structure and the fourth photodetector.

10. The device of claim 9 wherein the sensor module comprises an aperture mask, and the aperture mask comprises the first waveguide, the second waveguide, the third waveguide, and the fourth waveguide.

11. The device of claim 1 wherein based on the first distance being different from the second distance, the processor is adapted to determine an oxygen saturation value based on a first data received from the first source structure and a second data received from the second source structure.

12. The device of claim 1 wherein the probe tip comprises a temperature sensing unit configured to generate temperature information that represents the temperature of the first source structure, and wherein the processor is configured to adjust a duty cycle of an oscillating control signal supplied to the first source structure to adjust the luminosity generated by the first source structure based on the temperature information if the temperature of the first source structure changes.

13. The device of claim 1 wherein the processor calculates an oxygen saturation value using spatially-resolv

Assignees

• Vioptix Inc

Inventors

• Bechtel Kate Leeann
• Heanue Joseph
• Lloyd Lester John
• Solomon Edward

Classifications

• A61B5/0075 Primary

  by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy (A61B5/0071 takes precedence) · CPC title

• A61B5/1495 Primary

  Calibrating or testing of in-vivo probes · CPC title

• A61B2562/0271

  Thermal or temperature sensors · CPC title

• A61B5/7282

  Event detection, e.g. detecting unique waveforms indicative of a medical condition (cough events A61B5/0823; seizures A61B5/4094; sleep apnoea A61B5/4818) · CPC title

• A61B5/72

  Signal processing specially adapted for physiological signals or for diagnostic purposes · CPC title