BLOOD VISCOSITY ANALYSIS
First Claim
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1. A blood analyzing device comprising:
- a holder arranged for carrying a container having a cuvette comprising a blood sample;
a unit for inducing movement of blood cells in said blood sample when said container is positioned in said holder;
a light source arranged for providing input light of a wavelength at which a hemoglobin species has maximum absorbance into said blood sample;
a detector arranged for i) detecting, at least once within a measuring time interval following positioning of said container in said holder, output light having passed through said blood sample, ii) detecting. based on said output light from said blood sample and following said measuring time interval, a change in said induced movement of said blood cells in said blood sample as a reduction in a rate of change of absorbance at said wavelength at which said hemoglobin species has maximum absorbance and iii) generating a detection signal based on said detected change in said induced movement; and
a processor connected to said detector and arranged for i) determining at least one of total hemoglobin or at least one hemoglobin fraction in said blood sample based on said output fight detected during said measuring time interval and ii) determining a viscosity representing signal representative of a viscosity change in said blood sample based on said detection signal and said at least one of total hemoglobin or at least one hemoglobin fraction.
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Abstract
A blood analyzing device (100) comprises a holder (110) for receiving a cuvette (20) with a blood sample (30). The device (100) induces a movement of the blood cells in the sample (30) by applying a field (230) over the cuvette (20). A detector (130) detects, based on output light from the blood sample (30) originating from a light source (120), a change in the induced movement of the cells caused by an increase in viscosity of the blood due to an aggregation and/or coagulation process. A processor (140) processes the detector reading and generates a signal representative of the hemostasis function of the tested blood.
14 Citations
28 Claims
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1. A blood analyzing device comprising:
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a holder arranged for carrying a container having a cuvette comprising a blood sample; a unit for inducing movement of blood cells in said blood sample when said container is positioned in said holder; a light source arranged for providing input light of a wavelength at which a hemoglobin species has maximum absorbance into said blood sample; a detector arranged for i) detecting, at least once within a measuring time interval following positioning of said container in said holder, output light having passed through said blood sample, ii) detecting. based on said output light from said blood sample and following said measuring time interval, a change in said induced movement of said blood cells in said blood sample as a reduction in a rate of change of absorbance at said wavelength at which said hemoglobin species has maximum absorbance and iii) generating a detection signal based on said detected change in said induced movement; and a processor connected to said detector and arranged for i) determining at least one of total hemoglobin or at least one hemoglobin fraction in said blood sample based on said output fight detected during said measuring time interval and ii) determining a viscosity representing signal representative of a viscosity change in said blood sample based on said detection signal and said at least one of total hemoglobin or at least one hemoglobin fraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of analyzing a blood sample contained in a cuvette of a container, said method comprising:
- arranging said container in a holder of a blood analyzing device;
providing input light from a light source of a wavelength at which a hemoglobin species has maximum absorbance into said blood sample; detecting, at least once within a measuring time interval following positioning of said container in said holder, output light having passed through said blood sample; determining at least one of total hemoglobin or at least one hemoglobin fraction in said blood sample based on said output light detected during said measuring time interval; inducing movement of blood cells in said blood sample; detecting, based on said output light from said blood sample and following said measuring time interval, a change in said induced movement of said blood cells in said blood sample as a reduction in a rate of change of absorbance at said wavelength at which said hemoglobin species has maximum absorbance; generating a detection signal based on said detected change in said induced movement; and determining a viscosity representing signal representative of a viscosity change in said blood sample based on said detection signal and said at least one of total hemoglobin or at least one hemoglobin fraction. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
- arranging said container in a holder of a blood analyzing device;
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28-39. -39. (canceled)
Specification