Patent ID: 9216000
Filing Date: 2015-12-22
Classification: A61B,A61M

Abstract:
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 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: wherein the processor is adapted to: control the first and second diodes to emit the radiation at the four wavelengths to the first and second source structures via the first and second optical fibers and to emit the radiation at the four wavelengths into tissue to be measured from the first and second source structures, control the first and second plurality of detector structures to detect the radiation at the four wavelengths subsequent to reflection of the radiation from the tissue to be measured, receive digital reflectance data for the detected radiation detected by the first and second plurality of detector structures, calculate a plurality of absorption coefficients using the digital reflectance data for the radiation at the four wavelengths, solve a set of reflection coefficient equations for the tissue to be measured using the plurality of absorption coefficients to determine concentration values of oxygenated hemoglobin, deoxygenated hemoglobin, water, and melanin for the tissue, wherein the concentration values of oxygenated hemoglobin and deoxygenated hemoglobin are relatively independent of the concentration values of water and melanin for the tissue, and determine the absolute oxygen saturation for the tissue using the concentration values of oxygenated hemoglobin and deoxygenated hemoglobin.