Oximeter probe with light wavelengths to avoid surgical dyes
First Claim
1. A method comprising:
- providing a sensor head for a tissue oximetry device comprising;
detectors arranged on the sensor head; and
first and second light source structures positioned in a line on the sensor head, whereinthe first source structure is configured to emit at least a first wavelength of light longer than about 730 nanometers,the second source structure is configured to emit at least a second wavelength of light longer than about 730 nanometers,a first detector of the detectors is a first distance from the first light source,a second detector of the detectors is a second distance from the second light source,a third detector of the detectors is a third distance from the first light source,no detector is positioned between the first detector and the third detector, the line passes between the first detector and the third detector, the line is closer to the first detector than the third detector, and the first, second, and third detectors are not on the line,the first distance and the second distance are equal, andthe first distance and the third distance are not equal; and
enclosing a processing module in a housing coupled to the sensor head, wherein the processing module is adapted for determining an oxygen saturation value for a tissue to be measured using the first wavelength of light from the first source structure and the second wavelength of light from the second source structure emitted into the tissue and corresponding reflected light received by at least two of the detectors.
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Abstract
A tissue oximetry device utilizes at least three or at least four different wavelengths of light for collection of reflectance data where the different wavelengths are longer than 730 nanometers. The three or four wavelengths are utilized to generate a range of reflectance data suited for accurate determination of oxygenated hemoglobin and deoxygenated hemoglobin concentrations. The relatively long wavelengths decrease optical interference from certain dyes, particularly methylene blue and PVPI, which may be present on tissue being analyzed for viability and further enhance the generation of accurate reflectance data. The wavelengths are 760 nanometers, 810 nanometers, and 850 nanometers, or 760 nanometers, 810 nanometers, 850 nanometers, and 900 nanometers.
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Citations
54 Claims
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1. A method comprising:
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providing a sensor head for a tissue oximetry device comprising; detectors arranged on the sensor head; and first and second light source structures positioned in a line on the sensor head, wherein the first source structure is configured to emit at least a first wavelength of light longer than about 730 nanometers, the second source structure is configured to emit at least a second wavelength of light longer than about 730 nanometers, a first detector of the detectors is a first distance from the first light source, a second detector of the detectors is a second distance from the second light source, a third detector of the detectors is a third distance from the first light source, no detector is positioned between the first detector and the third detector, the line passes between the first detector and the third detector, the line is closer to the first detector than the third detector, and the first, second, and third detectors are not on the line, the first distance and the second distance are equal, and the first distance and the third distance are not equal; and enclosing a processing module in a housing coupled to the sensor head, wherein the processing module is adapted for determining an oxygen saturation value for a tissue to be measured using the first wavelength of light from the first source structure and the second wavelength of light from the second source structure emitted into the tissue and corresponding reflected light received by at least two of the detectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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providing a sensor head for a tissue oximetry device comprising; detectors arranged on the sensor head; and first and second light source structures positioned in a line on the sensor head, wherein the first source structure is configured to emit at least a first wavelength of light longer than about 730 nanometers, and the first wavelength of light is at least one of 760 nanometers, 810 nanometers, or 850 nanometers, the second source structure is configured to emit at least a second wavelength of light longer than about 730 nanometers, and the second wavelength of light is at least one of 760 nanometers, 810 nanometers, or 850 nanometers, a first detector of the detectors is a first distance from the first light source, a second detector of the detectors is a second distance from the second light source, a third detector of the detectors is a third distance from the first light source, no detector is positioned between the first detector and the third detector, the line passes between the first detector and the third detector, and the line is closer to the first detector than the third detector, the first distance and the second distance are equal, the first distance and the third distance are not equal, a fourth distance is between the first and second source structures, the fourth distance is greater than the first distance, is greater than the second distance, and is greater than the third distance, and the first and second source structures are coupled via optical fibers to light emitting diodes, and the first, second, and third detector structures comprise photodetectors; and enclosing a processing module in a housing coupled to the sensor head, wherein the processing module is adapted for determining an oxygen saturation value for a tissue to be measured using the first wavelength of light from the first source structure and the second wavelength of light from the second source structure emitted into the tissue and corresponding reflected light received by at least two of the detectors, the housing encloses a display, coupled to the processing module, and the display is visible from an exterior of the housing, a memory coupled to the processing module, and a battery coupled to and supplying power to the processing module and display. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method comprising:
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providing a sensor head for a tissue oximetry device comprising; a plurality of detector structures arranged on the sensor head; and first and second source structures positioned in a, first line on the sensor head, wherein the first source structure is configured to emit at least a first wavelength of light longer than about 730 nanometers, the second source structure is configured, to emit at least a second wavelength of light longer than about 730 nanometers, a first detector of the plurality of detectors is a first distance from the first light source, a second detector of the plurality of detectors is a second distance from the second light source, a third detector of the plurality of detectors is a third distance from the first light source, the first line is between the first detector and the third detector, and the first line is closer to the first detector than the third detector, the first and second distances are equal, the first and third distances are not equal, a second line between the first and second detectors does not pass through the first source structure and does not pass through the second source structure, a third line between the first and third detectors does not pass through the first source structure and does not pass through the second source structure, and a fourth line between the second and third detectors does not pass through the first source structure and does not pass through the second source structure; and enclosing a processing module in a housing coupled to the sensor head, wherein the processing module is adapted for determining an oxygen saturation value for a tissue to be measured using the first wavelength of light from the first source structure and the second wavelength of light from the second source structure emitted into the tissue and corresponding reflected light received by at least two of the detectors. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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Specification