DUAL MODE TEMPERATURE TRANSDUCER WITH OXYGEN SATURATION SENSOR
First Claim
1. Apparatus for detecting intracranial temperature and blood oxygenation in a patient, said apparatus comprisinga transducer having a working surface for placement against a patient'"'"'s cranium, said transducer includinga microwave antenna defining an aperture at or near said working surface, said antenna being tuned to a first frequency that produces a first output signal indicative of heat emanating from within a cranium against which it is placed,an oxygen saturation sensor sharing said aperture, said sensor including an electromagnetic radiation emitter which directs electromagnetic radiation across the aperture to a radiation detector, said detector sensing any radiation not absorbed by a cranium against which the transducer is placed and producing a corresponding second output signal, anda control unit connected to the transducer, said control unit includinga display,a radiometer centered on said first frequency and which receives said first output signal and produces a corresponding temperature signal, anda processor for processing the second output signal to calculate an oxygenation value for display by the control unit.
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Accused Products
Abstract
Apparatus for detecting intracranial temperature and blood oxygenation includes a transducer having a working surface for placement against a patient'"'"'s cranium. The transducer forms a microwave antenna having walls defining an aperture having a pair of opposite broader boundaries and a pair of opposite narrower boundaries at the working surface. The antenna is tuned to a frequency which produces a first output signal indicative of heat emanating from the cranium. An oxygen saturation sensor sharing that aperture includes a radiation emitter located at one of narrower boundaries which directs electromagnetic radiation across the aperture to a radiation detector at the other of the narrower boundaries and which produces a corresponding second output signal. A control unit includes a display and a processor for processing the signals to calculate an intracranial temperature and an oxygen saturation value for display by the control unit.
48 Citations
9 Claims
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1. Apparatus for detecting intracranial temperature and blood oxygenation in a patient, said apparatus comprising
a transducer having a working surface for placement against a patient'"'"'s cranium, said transducer including a microwave antenna defining an aperture at or near said working surface, said antenna being tuned to a first frequency that produces a first output signal indicative of heat emanating from within a cranium against which it is placed, an oxygen saturation sensor sharing said aperture, said sensor including an electromagnetic radiation emitter which directs electromagnetic radiation across the aperture to a radiation detector, said detector sensing any radiation not absorbed by a cranium against which the transducer is placed and producing a corresponding second output signal, and a control unit connected to the transducer, said control unit including a display, a radiometer centered on said first frequency and which receives said first output signal and produces a corresponding temperature signal, and a processor for processing the second output signal to calculate an oxygenation value for display by the control unit.
Specification