Tissue oximetry probe with tissue marking feature

Patent metadata

Field	Value
Publication number	US-9392978-B2
Application number	US-201313887213-A
Country	US
Kind code	B2
Filing date	May 3, 2013
Priority date	May 3, 2012
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

An intraoperative tissue oximetry device includes a tissue marker that includes one or more pens or one or more similar ink sources, such that the tissue marker can mark tissue according to oxygen saturation measurements made by the tissue oximetry device, thereby visually delineating regions of potentially viable tissue from regions of potentially nonviable tissue.

First claim

The invention claimed is:

1. A handheld tissue oximetry 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 tissue marking component, contained within the housing, wherein the tissue marking component is coupled to the processor;
a battery, contained within the housing, coupled to and supplies power to the processor, memory, and 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 sensor module comprises:
a dispenser formed on the probe face and connected to the tissue marking component;
a first plurality of detectors structures, formed on the probe face, arranged in a circular arrangement, symmetrically about a point on a line intersecting a circle of the circular arrangement at a first point and a second point;
a second plurality of detector structures, formed on the probe face, arranged asymmetrically about the point on the line in the circular arrangement;
a first source structure, formed on the probe face, positioned at the first point of the circle of the circular arrangement;
a second source structure, formed on the probe face, positioned at the second point of the circle of the circular arrangement;
a first source diode and a second source diode;
a first optical fiber optically coupled between the first source diode and the first source structure;
a second optical fiber optically coupled between the second source diode and the second source structure, wherein the first optical fiber transmits radiation emitted by the first source diode to the first source structure, and the second optical fiber transmits radiation emitted by the second source diode to the second source structure;
a first detector structure on the circle of the first plurality of detector structures, 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 on the circle of the first plurality of detector structures, arranged symmetrically with respect to the first detector structure about the point on the line, 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, 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 on the circle of the second plurality of detector structures, arranged asymmetrically with respect to the first plurality of detectors structures about the point on the line, 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 on the circle of the second plurality of detector structures, arranged asymmetrically with respect to the first plurality of detectors structures and the third detector structure about the point on the line, 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, wherein the first distance is greater the 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 process reflectance data received from the detector structures for radiation emitted into tissue to be measured by the source structures, determine an oxygen saturation value for the tissue based on the reflectance data, control the display to display an indicator for the oxygen saturation value, control the tissue marking component for dispensing a first marking material from the dispenser if the oxygen saturation value is within a first range of oxygen saturation values and not within a second range of oxygen saturation values, and the first and second ranges of oxygen saturation values are different ranges.

2. The device of claim 1 wherein the dispenser is at a position other than the center of the circular arrangement.

3. The device of claim 1 wherein the handheld tissue oximetry device is a standalone unit adapted for single-handheld operation by a user.

4. The device of claim 3 wherein the processor is adapted to control the tissue marking component for dispensing a second marking material from the dispenser onto the tissue if the oxygen saturation value is within the second range of oxygen saturation values, and the first and second marking materials have first and second colors that are different colors.

5. The device of claim 4 wherein the first marking material and the second marking material are different materials.

6. The device of claim 4 wherein information for the first and second ranges of the oxygen saturation values are user programmable.

7. The device of claim 4 wherein information for the first and second ranges of the oxygen saturation values are previously stored in the memory.

8. The device of claim 7 comprising:
a user selection device configured to be activated by a user, wherein the user selection device is configured to enable and disable the processor for controlling the tissue marking component for depositing the first marking material via the dispenser.

9. The device of claim 1 wherein the housing comprises a user selection device, accessible from an exterior of the housing, adapted to be activated by a user, and activation of the user selection device controls the tissue marking component to deposit the first marking material onto the tissue to be measure via the dispenser.

10. The device of claim 1 wherein the housing comprises a user selection device configured to initiate movement of the dispenser from a first position to a second position in the sensor module, in the first position the dispenser is configured not to deposit the marking material onto the tissue to be measured and in the second position the dispenser is configured to deposit the marking material onto the tissue to be measured.

11. The device of claim 1 wherein the processor is adapted to control the dispenser to move from a first position to a second position in the sensor module, in the first position the dispenser is configured not to deposit the marking material onto the tissue to be measured, and in the second position the dispenser is configured to deposit the marking material onto the tissue to be measured subsequent to an oxygen saturation measurement.

12. A handheld tissue oximetry 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

Assignees

• Vioptix Inc

Inventors

• Bechtel Kate Leeann
• Heanue Joseph Anthony
• Lloyd Lester John

Classifications

• A61B5/1459

  invasive, e.g. introduced into the body by a catheter · CPC title

• A61B5/14552

  Details of sensors specially adapted therefor · CPC title

• A61M35/003

  Portable hand-held applicators having means for dispensing or spreading integral media (hand-held massage devices with liquid delivery A61H7/003) · CPC title

• A61B2090/306

  using optical fibres · CPC title

• A61B2562/166

  the sensor is mounted on a specially adapted printed circuit board · CPC title