Systems and methods for measuring oxygenation
First Claim
1. A desktop-sized console for monitoring oxygenation of a subject, said console comprising:
- a laser diode subsystem for emitting light pulses directed to tissue of a subject, the laser diode subsystem comprising;
a first laser diode configured to emit a first light pulse at a first output wavelength,a first thermoelectric cooler coupled to the first laser diode to regulate a temperature of the first laser diode,a second laser diode configured to emit a second light pulse at a second output wavelength different from the first output wavelength,a second thermoelectric cooler coupled to the second laser diode to regulate a temperature of the second laser diode,a first cooling fan, andat least one controller coupled to and configured to control the first cooling fan, the first thermoelectric cooler, and the second thermoelectric cooler to regulate the temperatures of the first and second laser diodes to stabilize the output wavelengths of the first and second laser diodes within optimal ranges;
an acoustic sensor subsystem for measuring acoustic pressure generated in the tissue in response to the emitted light pulses; and
a processor coupled to the laser diode subsystem to control the laser diode subsystem and coupled to the acoustic sensor subsystem to receive the measured acoustic pressure, wherein the processor is configured to determine oxygenation of the subject in response to the received acoustic pressure.
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Accused Products
Abstract
Optoacoustic diagnostic systems, devices, and methods are described. A system may comprise a console unit and a handheld probe. The console unit comprises a controller, a processor, a photodiode array, an acoustic processing subsystem, and a cooling subsystem. The probe directs light signals from the photodiode array to patient tissue. The light signals each have different wavelengths selected based on the physiological parameter of interest. The probe further comprises an acoustic transducer that receives acoustic signals generated in response to the directed light signals. The probe may comprise a finger-held working end that can be directed to the skull of a fetus within the uterus during labor. The probe can then accurately determine blood oxygenation of the fetus to determine if a caesarian section is necessary.
70 Citations
26 Claims
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1. A desktop-sized console for monitoring oxygenation of a subject, said console comprising:
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a laser diode subsystem for emitting light pulses directed to tissue of a subject, the laser diode subsystem comprising; a first laser diode configured to emit a first light pulse at a first output wavelength, a first thermoelectric cooler coupled to the first laser diode to regulate a temperature of the first laser diode, a second laser diode configured to emit a second light pulse at a second output wavelength different from the first output wavelength, a second thermoelectric cooler coupled to the second laser diode to regulate a temperature of the second laser diode, a first cooling fan, and at least one controller coupled to and configured to control the first cooling fan, the first thermoelectric cooler, and the second thermoelectric cooler to regulate the temperatures of the first and second laser diodes to stabilize the output wavelengths of the first and second laser diodes within optimal ranges; an acoustic sensor subsystem for measuring acoustic pressure generated in the tissue in response to the emitted light pulses; and a processor coupled to the laser diode subsystem to control the laser diode subsystem and coupled to the acoustic sensor subsystem to receive the measured acoustic pressure, wherein the processor is configured to determine oxygenation of the subject in response to the received acoustic pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of monitoring oxygenation of a subject, said method comprising:
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generating, with a first laser diode, a first light pulse at a first output wavelength; generating, with a second laser diode, a second light pulse at a second output wavelength different from the first output wavelength; regulating temperatures of the first and second laser diodes to stabilize the output wavelengths of the first and second laser diodes within optimal ranges, wherein the temperatures are regulated with a first thermoelectric cooler coupled to the first laser diode, a second thermoelectric cooler coupled to the second laser diode, and a first cooling fan; directing the generated first and second light pulses to tissue of a subject; measuring acoustic pressure generated in the tissue in response to the directed first and second light pulses; and determining oxygenation of the subject in response to the measured acoustic pressure. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification