CALIBRATION METHOD AND ARRANGEMENT AND SENSOR FOR NON-INVASIVELY MEASURING BLOOD CHARACTERISTICS OF A SUBJECT
First Claim
1. A method for calibrating an apparatus intended for non-invasively measuring blood characteristics of a subject, the method comprising providing the apparatus with a computational model representing a relationship between in-vivo measurement signals obtained from the subject and the blood characteristics, wherein the providing includes employing at least one tissue property variable in the computational model, in which the at least one tissue property variable is indicative of absorption and scattering characteristics of the subject'"'"'s tissue.
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Abstract
A calibration method for an apparatus for non-invasively monitoring blood characteristics of a subject is disclosed. The apparatus is provided with a computational model representing a relationship between in-vivo measurement signals obtained from the subject and the blood characteristics. The providing includes employing at least one tissue property variable in the computational model, in which the at least one tissue property variable is indicative of absorption and scattering characteristics of the subject'"'"'s tissue. An arrangement for determining blood characteristics of a subject and a sensor for the arrangement are also disclosed.
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Citations
14 Claims
- 1. A method for calibrating an apparatus intended for non-invasively measuring blood characteristics of a subject, the method comprising providing the apparatus with a computational model representing a relationship between in-vivo measurement signals obtained from the subject and the blood characteristics, wherein the providing includes employing at least one tissue property variable in the computational model, in which the at least one tissue property variable is indicative of absorption and scattering characteristics of the subject'"'"'s tissue.
- 7. An arrangement for determining blood characteristics of a subject, the arrangement comprising a control and processing unit configured to acquire in-vivo measurement signals from a subject, wherein the control and processing unit is provided with a computational model representing a relationship between the in-vivo measurement signals and desired blood characteristics of the subject and wherein the computational model is adapted to employ at least one tissue property variable indicative of absorption and scattering characteristics of the subject'"'"'s tissue.
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14. A sensor for an arrangement intended for determining blood characteristics of a subject, the sensor being attachable to the subject and comprising:
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an emitter unit configured to emit radiation through tissue of the subject at a plurality of measurement wavelengths; a detector unit comprising at least one photo detector adapted to receive the radiation at the plurality of wavelengths and to produce in-vivo measurement signals corresponding to the plurality of measurement wavelengths, wherein the sensor comprises a memory storing an identifier identifying a computational model to be used for determining the blood characteristics, wherein the computational model is adapted to employ at least one tissue property variable indicative of absorption and scattering characteristics of the subject'"'"'s tissue.
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Specification