Blood analyzing device for malaria analysis
OwnerTommy Forsellinventor
Life of this patent
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Abstract
A blood analyzing device (100) comprises a light source (120) arranged to generate light (40) of a wavelength at which a Hb species in a hemolyzed blood sample (30) has absorbance. A detector system (130) is arranged to detect output light (50) from the sample (30) and generate a Hb signal representative of an amount of the Hb species in the sample (30) and a parasite signal representative of an amount of malaria parasites in the sample (30). A processor (140) generates a red blood cell value based on the Hb signal and generates a parasitemia value based on the parasite signal and the red blood cell value. A display (160) displays the parasitemia value representing a percentage of the red blood cells that are infected by malaria parasites.
Claims23
A blood analyzing device comprising:
- a holder arranged to carry a container having a cuvette comprising a hemolyzed blood sample;
- a light source operable to generate input light of at least one wavelength at which a hemoglobin (Hb) species has absorbance and arranged to direct said input light into said hemolyzed blood sample;
- a detector system arranged to detect output light from said hemolyzed blood sample and operable to generate, based on said output light, i) a Hb signal representative of an amount of said Hb species in said hemolyzed blood sample, and ii) a parasite signal representative of an amount of malaria parasites in said hemolyzed blood sample;
- a processor configured to process said Hb signal to generate a red blood cell value representative of a concentration of red blood cells in said blood sample prior to hemolysis and configured to generate, based on said parasite signal and said red blood cell value, a parasitemia value representative of a percentage of said red blood cells in said blood sample that are infected by a respective malaria parasite;
- and
- a display operable to display said parasitemia value.
A blood analyzing device, comprising:
- a holder arranged to carry a container having a cuvette comprising a hemolyzed blood sample;
- a light source operable to generate input light of at least one wavelength at which a hemoglobin (Hb) species has absorbance and arranged to direct said input light into said hemolyzed blood sample,
- a detector system arranged to detect output light from said hemolyzed blood sample and operable to generate, based on said output light, i) a Hb signal representative of an amount of said Hb species in said hemolyzed blood sample, and ii) a parasite signal representative of an amount of malaria parasites in said hemolyzed blood sample;
- a light trap arranged in a light path of said output light from said hemolyzed blood sample when said container is carried by said holder and said detector system, wherein said light trap is operable to reduce an amount of scattered light in said output light having passed through said hemolyzed blood sample, wherein said light trap is a cylinder of light absorbing material having concentrically placed entry and exit holes of a respective diameter that is smaller than an inner diameter of said cylinder, and wherein a length of said cylinder is in a range of 5 to 30 times said respective diameter of said entry and exit holes,
- a processor configured to process said Hb signal to generate a red blood cell value representative of a concentration of red blood cells in said blood sample prior to hemolysis and configured to generate, based on said parasite signal and said red blood cell value, a parasitemia value representative of a percentage of said red blood cells in said blood sample that are infected by a respective malaria parasite;
- and
- a display operable to display said parasitemia value.
Dependencies are inferred from the claim text.