Cassette-based method and apparatus for measuring the presence and concentration of pharmaceutical substances in a medical fluid
First Claim
1. A medical fluid delivery system comprising:
- a medical fluid delivery machine for delivering a medical fluid, the medical fluid delivery machine including a light source configured to generate a light beam;
a polarizer configured to receive the light beam and to allow a portion of the light beam to be transmitted through the polarizer;
a photodetector configured to provide a measurement of an intensity of the light beam transmitted through the medical fluid and the polarizer;
a medical fluid cassette operating with the medical fluid delivery machine to pump the medical fluid, the medical fluid cassette including a rigid structure defining a fluid passageway located between first and second light-transmissive sides of the medical fluid cassette, the cassette further including a pumping portion in fluid communication with the fluid passageway, the medical fluid cassette loaded onto the medical fluid delivery machine such that (i) the light source resides on the first side of the cassette, (ii) the photodetector resides on the second side of the cassette, and (iii) the light beam from the light source is transmitted into the passageway of the cassette; and
a computer configured to use the measurement of the intensity to determine whether the medical fluid can be delivered to a patient.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical fluid delivery system includes a medical fluid delivery machine including a light source configured to generate a light beam; a polarizer configured to receive the light beam and to allow a portion of the light beam within the medical fluid to be transmitted through the polarizer, a photodetector to provide a measurement of an intensity of the light beam transmitted through a medical fluid and the polarizer; a medical fluid cassette operating with the medical fluid machine to pump the medical fluid, the medical fluid cassette loaded onto the medical fluid delivery machine such that the light source resides on a first side of the cassette and the photodetector resides on a second side of the cassette; and a computer configured to use the measurement of the intensity to determine whether the medical fluid can be delivered to a patient.
9 Citations
22 Claims
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1. A medical fluid delivery system comprising:
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a medical fluid delivery machine for delivering a medical fluid, the medical fluid delivery machine including a light source configured to generate a light beam; a polarizer configured to receive the light beam and to allow a portion of the light beam to be transmitted through the polarizer; a photodetector configured to provide a measurement of an intensity of the light beam transmitted through the medical fluid and the polarizer; a medical fluid cassette operating with the medical fluid delivery machine to pump the medical fluid, the medical fluid cassette including a rigid structure defining a fluid passageway located between first and second light-transmissive sides of the medical fluid cassette, the cassette further including a pumping portion in fluid communication with the fluid passageway, the medical fluid cassette loaded onto the medical fluid delivery machine such that (i) the light source resides on the first side of the cassette, (ii) the photodetector resides on the second side of the cassette, and (iii) the light beam from the light source is transmitted into the passageway of the cassette; and a computer configured to use the measurement of the intensity to determine whether the medical fluid can be delivered to a patient. - 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 medical fluid delivery system comprising:
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a medical fluid delivery machine including a laser beam light source configured to generate a laser beam; a medical fluid cassette operating with the medical fluid delivery machine to pump a medical fluid, the medical fluid cassette including a rigid structure defining a fluid passageway located between first and second light-transmissive sides of the medical fluid cassette, the cassette further including a pumping portion in fluid communication with the fluid passageway, the medical fluid cassette loaded onto the medical fluid delivery machine such that (i) the laser beam light source resides on the first side of the medical fluid delivery cassette and (ii) a photodetector resides on the second side of the medical fluid delivery cassette, the photodetector configured to provide a measurement of an intensity of the laser beam transmitted through the medical fluid flowing through the passageway of the medical fluid cassette; and a computer configured to use the measurement of the intensity to determine whether the medical fluid can be delivered to a patient.
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19. A medical fluid delivery system comprising:
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a medical fluid delivery machine for delivering a medical fluid, the medical fluid delivery machine including a light source configured to generate a light beam; a polarizer configured to receive the light beam and to allow a portion of the light beam within the medical fluid to be transmitted through the medical fluid and the polarizer; a photodetector configured to provide a measurement of an intensity of the light beam transmitted through the medical fluid and the polarizer; medical fluid tubing operating with the medical fluid delivery machine to pump the medical fluid, the medical fluid tubing loaded onto the medical fluid delivery machine adjacent the polarizer, such that the light source resides on a first side of the medical fluid tubing and the photodetector resides on a second side of the medical fluid tubing, wherein the light beam from the light source is transmitted through the medical fluid tubing; and a computer configured to use the measurement of the intensity to determine whether the medical fluid can be delivered to a patient. - View Dependent Claims (20)
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21. A dialysis system comprising:
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a dialysis machine for delivering a dialysis fluid, the dialysis machine including a light source configured to generate a light beam; a polarizer configured to receive the light beam and to allow a portion of the light beam within the dialysis fluid to be transmitted through the polarizer; a photodetector configured to provide a measurement of an intensity of the light beam transmitted through the medical fluid and the polarizer; a dialysis fluid cassette operating with the dialysis machine to pump the dialysis fluid, the dialysis fluid cassette including a rigid structure defining a fluid passageway located between first and second light-transmissive sides of the dialysis fluid cassette, the cassette further including a pumping portion in fluid communication with the fluid passageway, the dialysis fluid cassette loaded onto the dialysis machine such that (i) the light source resides on the first side of the dialysis fluid cassette, (ii) the photodetector resides on the second side of the dialysis fluid cassette, and (iii) the light beam from the light source is transmitted into the passageway of the cassette; and a computer configured to use the measurement of the intensity to determine whether the dialysis fluid can be delivered to a patient.
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22. A drug delivery system comprising:
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a drug delivery machine for delivering a drug, the drug delivery machine including a light source configured to generate a light beam; a polarizer configured to receive the light beam and to allow a portion of the light beam within the drug to be transmitted through the polarizer; a photodetector configured to provide a measurement of an intensity of the light beam transmitted through the drug and the polarizer; a drug delivery cassette operating with the drug delivery machine to pump the drug, the drug delivery cassette including a rigid structure defining a fluid passageway located between first and second light-transmissive sides of the drug delivery cassette, the cassette further including a pumping portion in fluid communication with the fluid passageway, the drug delivery cassette loaded onto the drug delivery machine such that the light source resides on the first side of the drug delivery cassette and the photodetector resides on the second side of the drug delivery cassette, wherein the light beam from the light source is transmitted through the passageway of the cassette; and a computer configured to use the measurement of the intensity to determine whether the drug can be delivered to a patient.
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Specification