Method for spectrophotometric blood oxygenation monitoring
First Claim
1. A method for non-invasively determining a blood oxygen parameter value of a subject'"'"'s tissue, comprising:
- providing a spectrophotometric sensor having one or more transducers and a processor portion, each transducer including at least one light source and at least one light detector, and the processor portion including at least one processor;
using the at least one processor to execute algorithmic instructions stored in a memory device, which instructions cause the at least one processor to;
control the at least one light source to transmit light at one or more wavelengths of red light into the subject'"'"'s tissue;
control the at least one light detector to sense the transmitted red light after passage through the subject'"'"'s tissue and produce initial signals representative of the sensed red light;
receive and process the initial signals from the at least one light detector and produce first signal data from the initial signals;
selectively alter the algorithmic instructions using the first signal data to account for the specific physical characteristics of the particular subject'"'"'s tissue being sensed; and
determine the blood oxygen parameter value within the subject'"'"'s tissue using the selectively altered algorithmic instructions.
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Accused Products
Abstract
According to the present invention, a method and apparatus for non-invasively determining the blood oxygen saturation level within a subject'"'"'s tissue is provided. The method comprises the steps of: a) providing a spectrophotometric sensor operable to transmit light into the subject'"'"'s tissue, and to sense the light; b) detecting light after passage through the subject'"'"'s tissue using the sensor, and producing initial signal data from the light sensed; c) calibrating the sensor to that particular subject using the initial signal data, thereby accounting for the specific physical characteristics of the particular subject'"'"'s tissue being sensed; and d) using the calibrated sensor to determine the blood oxygen parameter value within the subject'"'"'s tissue.
44 Citations
16 Claims
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1. A method for non-invasively determining a blood oxygen parameter value of a subject'"'"'s tissue, comprising:
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providing a spectrophotometric sensor having one or more transducers and a processor portion, each transducer including at least one light source and at least one light detector, and the processor portion including at least one processor; using the at least one processor to execute algorithmic instructions stored in a memory device, which instructions cause the at least one processor to; control the at least one light source to transmit light at one or more wavelengths of red light into the subject'"'"'s tissue; control the at least one light detector to sense the transmitted red light after passage through the subject'"'"'s tissue and produce initial signals representative of the sensed red light; receive and process the initial signals from the at least one light detector and produce first signal data from the initial signals; selectively alter the algorithmic instructions using the first signal data to account for the specific physical characteristics of the particular subject'"'"'s tissue being sensed; and determine the blood oxygen parameter value within the subject'"'"'s tissue using the selectively altered algorithmic instructions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for non-invasively determining a blood oxygen parameter value of a subject'"'"'s tissue, comprising:
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at least one transducer having at least one light source and at least one light detector, wherein the transducer is configured to be applied to a tissue surface of the subject with the at least one light source positioned to transmit light into the subject'"'"'s tissue and the at least one light detector positioned to sense the transmitted light after passage through the subject'"'"'s tissue; and a processor portion having at least one processor in communication with a memory device storing algorithmic instructions, which instructions cause the at least one processor to selectively; control the at least one light source to transmit light at one or more wavelengths of red light into the subject'"'"'s tissue; control the at least one light detector to sense the transmitted red light after passage through the subject'"'"'s tissue and produce initial signals representative of the sensed red light; receive and process the initial signals from the at least one light detector and produce first signal data from the initial signals; alter the algorithmic instructions using the first signal data to account for the specific physical characteristics of the particular subject'"'"'s tissue being sensed; and determine the blood oxygen parameter value within the subject'"'"'s tissue using the selectively altered algorithmic instructions. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification