Apparatus for photo reduction of contaminants in blood and blood products with calibration means
First Claim
1. An irradiation apparatus for inactivating pathogens or white blood cells in a fluid containing blood components comprising:
- at least one radiation emitting source, said source emitting radiation suitable for inactivating pathogens or white blood cells in a fluid containing blood components; and
a control unit for controlling the radiation emitting source,a radiometer in electrical communication with said control unit, said radiometer comprisinga first elongated optical chamber having a first slot between said at least one radiation emitting source and said optical chamber, said first slot for receiving at least some of said radiation into said optical chamber and a photo sensor responsive to said received radiation in said optical chamber,a first elongated integrating chamber optically coupled to said first optical chamber by a second slot and wherein said sensor is in said first integrating chamber,wherein said second slot is generally perpendicular to said first slot with respect to an axis of symmetry of said first optical chamber.
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0 Petitions
Accused Products
Abstract
An apparatus for irradiating blood or blood products, preferably with ultra violet or visible light, to reduce contaminants in the blood or blood products. A removable radiometer having light integrating chambers detects the light intensity, allowing the radiation characteristics of the apparatus to be calibrated. A control circuit uses the measurements to control the delivery of an effective dose of illumination to blood or blood products in a bag or container. One or more light integrating optical chambers in the radiometer allow a single light sensor to sense light across an entire field. Thermistors in the irradiating apparatus or the radiometer or both sense the temperature of photo sensors. The control circuit compensates for temperature-dependant variations in the output of the photo sensors.
49 Citations
17 Claims
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1. An irradiation apparatus for inactivating pathogens or white blood cells in a fluid containing blood components comprising:
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at least one radiation emitting source, said source emitting radiation suitable for inactivating pathogens or white blood cells in a fluid containing blood components; and a control unit for controlling the radiation emitting source, a radiometer in electrical communication with said control unit, said radiometer comprising a first elongated optical chamber having a first slot between said at least one radiation emitting source and said optical chamber, said first slot for receiving at least some of said radiation into said optical chamber and a photo sensor responsive to said received radiation in said optical chamber, a first elongated integrating chamber optically coupled to said first optical chamber by a second slot and wherein said sensor is in said first integrating chamber, wherein said second slot is generally perpendicular to said first slot with respect to an axis of symmetry of said first optical chamber. - View Dependent Claims (2, 3)
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4. An irradiation apparatus for inactivating pathogens or white blood cells in a fluid containing blood components comprising:
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at least one radiation emitting source, said source emitting radiation suitable for inactivating pathogens or white blood cells in a fluid containing blood components; and a control unit for controlling the radiation emitting source, a radiometer in electrical communication with said control unit, said radiometer comprising a first optical chamber having an aperture between said at least one radiation emitting source and said optical chamber, said aperture for receiving at least some of said radiation into said optical chamber and a photo sensor responsive to said received radiation in said optical chamber; a second radiation emitting source emitting radiation; said radiometer being mounted between said radiation emitting source and said second radiation emitting source, said radiometer further comprising a second optical chamber having a second aperture between said second radiation emitting source and said second optical chamber, said second aperture for receiving at least some of said radiation from said second radiation source and a second photo sensor responsive to said received radiation in said second optical chamber. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification