Method and system for use in non-invasive optical measurements of blood parameters
First Claim
1. A system for use in non-invasive optical measurements in a human body, the system comprising:
- a probe configured as a ring-like device for removable mounting onto a patient'"'"'s finger so as to enclose and hold a portion of a patient'"'"'s blood perfused flesh medium between two semi-ring portions, said probe carrying a pressurizing assembly and carrying an optical measuring unit, the measuring unit being configured and operable for performing optical measurement and comprising an illumination assembly for illuminating a measurement location on the finger with incident light beams of at least two different wavelengths and a detection assembly configured and operable for detecting at least two light responses of the medium for said at least two different wavelengths, and generating at least two measured data portions indicative of said light responses; and
a control unit configured for operating the pressurizing assembly to apply over-systolic pressure to said measurement location and maintain the application of over-systolic pressure during a certain time period, and for operating the measuring unit to perform said optical measurement during said certain time period, said control unit being preprogrammed for receiving and analyzing said at least two measured data portions, determining time evolutions of the light responses, determining a relation between said time evolutions indicative of at least one parameter of the patient'"'"'s fleshy medium, and displaying said at least one parameter.
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Accused Products
Abstract
A method and device are presented for use in non-invasive optical measurements of at least one desired characteristic of patient'"'"'s blood. A condition of artificial blood kinetics is created at a measurement location in a patient'"'"'s blood perfused fleshy medium and maintained for a certain time period. This condition is altered over a predetermined time interval within said certain time period so as to modulate scattering properties of blood. Optical measurements are applied to the measurement location by illuminating it with incident light beams of at least two different wavelengths in a range where the scattering properties of blood are sensitive to light radiation, detecting light responses of the medium, and generating measured data indicative of time evolutions of the light responses of the medium for said at least two different wavelengths, respectively, over at least a part of said predetermined time interval.
18 Citations
8 Claims
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1. A system for use in non-invasive optical measurements in a human body, the system comprising:
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a probe configured as a ring-like device for removable mounting onto a patient'"'"'s finger so as to enclose and hold a portion of a patient'"'"'s blood perfused flesh medium between two semi-ring portions, said probe carrying a pressurizing assembly and carrying an optical measuring unit, the measuring unit being configured and operable for performing optical measurement and comprising an illumination assembly for illuminating a measurement location on the finger with incident light beams of at least two different wavelengths and a detection assembly configured and operable for detecting at least two light responses of the medium for said at least two different wavelengths, and generating at least two measured data portions indicative of said light responses; and a control unit configured for operating the pressurizing assembly to apply over-systolic pressure to said measurement location and maintain the application of over-systolic pressure during a certain time period, and for operating the measuring unit to perform said optical measurement during said certain time period, said control unit being preprogrammed for receiving and analyzing said at least two measured data portions, determining time evolutions of the light responses, determining a relation between said time evolutions indicative of at least one parameter of the patient'"'"'s fleshy medium, and displaying said at least one parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification