Blood parameter measurement device
First Claim
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1. A device for measuring one or more parameters of blood comprising:
- a housing having a coupling for releasable connection to a blood parameter measurement cassette;
at least one light source;
a first plurality of optical fibers optically coupled to said at least one light source and extending toward said coupling for directing light toward the cassette, said first plurality of optical fibers having a certain cross-sectional area adjacent said coupling;
at least one light detector;
a second plurality of optical fibers optically coupled to said at least one light detector and extending toward said coupling for receiving light from the cassette, said second plurality of optical fibers having a cross-sectional area adjacent said coupling that is in the range of about two to about four times said certain cross-sectional area of said first plurality.
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Abstract
A blood parameter measurement device especially useful for surgical procedures includes a compact housing with a light source, light detector and signal converter contained within the housing. In use, the device is releasably coupled to a cassette that can be either used as an in-line cell in series with a cardiopulmonary by-pass circuit, or in another passageway that shunts the cardiopulmonary by-pass circuit. Preferably, the housing of the device has a longitudinal axis that extends in a direction generally parallel to the direction of blood flowing through the cassette.
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Citations
11 Claims
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1. A device for measuring one or more parameters of blood comprising:
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a housing having a coupling for releasable connection to a blood parameter measurement cassette;
at least one light source;
a first plurality of optical fibers optically coupled to said at least one light source and extending toward said coupling for directing light toward the cassette, said first plurality of optical fibers having a certain cross-sectional area adjacent said coupling;
at least one light detector;
a second plurality of optical fibers optically coupled to said at least one light detector and extending toward said coupling for receiving light from the cassette, said second plurality of optical fibers having a cross-sectional area adjacent said coupling that is in the range of about two to about four times said certain cross-sectional area of said first plurality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification