Method and apparatus for making physiological measurements

Surgery – Truss – Pad

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128664, A61B 1000

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active

044428448

ABSTRACT:
Measurements having physiological significance can be obtained by analyzing radiation which is reflected by an artery of the body. Such measurements are preferably made by immobilizing a part of the body such as the human wrist where an artery extends substantially linearly and is adjacent to and generally parallel with the surface of the skin, by then directing radiation from a radiation source or sending apparatus toward any of several specific locations along the artery at an angle such that some of the radiation will be reflected, and by next measuring the amount of reflected radiation in accordance with time through the use of a receiving or detection apparatus. These locations are specific regions or areas generally along and generally extending transverse to the artery which have been established on the basis of experience as normally being capable of reflecting back at least some radiation in an amount having physiological significance.

REFERENCES:
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patent: 4086915 (1978-05-01), Kofsky et al.
patent: 4191195 (1980-03-01), Miller
patent: 4227407 (1980-10-01), Drost
patent: 4321930 (1982-03-01), Jobsis et al.
patent: 4336808 (1982-06-01), Ohno et al.

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