Control or calibration standard for use with instruments for optical measurement of hemoglobin concentration in blood samples
First Claim
1. A control or calibration standard for use with instruments for optical measurement of hemoglobin concentration in blood samples, said standard being comprised of scattering calibration particles dispersed in an aqueous electrolyte solution, wherein said dispersed particles have a mean diameter of <
- 0.06 μ
m and a volume concentration <
0.3%, the mass density of said electrolyte solution substantially corresponding to a mass density of said scattering particles.
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Accused Products
Abstract
A control or calibration standard for use with instruments for the optical measurement of the hemoglobin content in blood samples, features scattering particles or beads dispersed in aqueous electrolyte solution. To prevent sedimentation of the beads during storage, they have a mean diameter of <0.6 μm, preferably about 0.3 μm, and a volume concentration of <1%, preferably <0.3%. To prevent long term agglomeration, a non-ionic surfactant with an added antioxidant can be included in the formulation.
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Citations
25 Claims
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1. A control or calibration standard for use with instruments for optical measurement of hemoglobin concentration in blood samples, said standard being comprised of scattering calibration particles dispersed in an aqueous electrolyte solution, wherein said dispersed particles have a mean diameter of <
- 0.06 μ
m and a volume concentration <
0.3%, the mass density of said electrolyte solution substantially corresponding to a mass density of said scattering particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- 0.06 μ
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11. A control or calibration standard for use with blood gas measuring systems and instruments for optical measurement of hemoglobin concentration in blood samples, said standard comprising scattering particles dispersed in an aqueous electrolyte solution, wherein said scattering particles have a mean diameter of <
- 0.6 μ
m and a volume concentration of <
0.3%, wherein said electrolyte solution contains a buffer providing a pH of 6.7 to 7.9 and wherein values for PCO2 are between 10 and 100 mm Hg, and for PO2 are between 15 and 400 mm Hg. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- 0.6 μ
Specification