Modular flow cassette
First Claim
Patent Images
1. A flow cassette comprising:
- a housing having an inlet and an outlet with a passage therebetween;
a cap configured to hold a filter within the passage via at least one leg, the filter concentrically located within the passage;
a temperature sensor disposed within the passage and configured to measure a temperature of a fluid flowing through the passage;
a flow rate sensor disposed within the passage and configured to measure a flow rate of the fluid flowing through the passage, the flow rate sensor including a flow restriction disposed within the passage; and
a processor coupled to the temperature sensor and flow rate sensor, the processor configured to accept measurements of the temperature and the flow rate from the temperature sensor and flow rate sensor, respectively, and provide a compensated flow rate.
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Accused Products
Abstract
A flow cassette has a housing with an inlet and an outlet and a passage therebetween. The flow cassette also has a temperature sensor disposed within the passage and configured to measure the temperature of a fluid flowing through the passage, a flow rate sensor disposed within the passage and configured to measure a flow rate of the fluid flowing through the passage, and a processor coupled to the temperature sensor and flow rate sensor. The processor is configured to accept measurements of temperature and flow rate from the temperature sensor and flow rate sensor, respectively, and provide a compensated flow rate.
113 Citations
21 Claims
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1. A flow cassette comprising:
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a housing having an inlet and an outlet with a passage therebetween; a cap configured to hold a filter within the passage via at least one leg, the filter concentrically located within the passage; a temperature sensor disposed within the passage and configured to measure a temperature of a fluid flowing through the passage; a flow rate sensor disposed within the passage and configured to measure a flow rate of the fluid flowing through the passage, the flow rate sensor including a flow restriction disposed within the passage; and a processor coupled to the temperature sensor and flow rate sensor, the processor configured to accept measurements of the temperature and the flow rate from the temperature sensor and flow rate sensor, respectively, and provide a compensated flow rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of configuring a ventilator for a patient, the method comprising:
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removing a cassette from the ventilator; and installing a flow cassette into the ventilator, the flow cassette comprising a housing having an inlet and an outlet with a passage therebetween, a cap configured to hold a filter within the passage via at least one leg, the filter concentrically located within the passage, a temperature sensor disposed within the passage and configured to measure a temperature of a fluid flowing through the passage, a flow rate sensor disposed within the passage and configured to measure a flow rate of the fluid flowing through the passage, a flow restriction disposed within the passage, and a processor coupled to the temperature sensor and flow rate sensor and configured to accept measurements of the temperature and the flow rate from the temperature sensor and flow rate sensor, respectively, and provide a compensated flow rate. - View Dependent Claims (10, 11, 12, 13)
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14. A ventilator comprising:
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an output flow channel configured to mate with a supply limb; an input flow channel configured to accept a gas from a source; and a flow cassette comprising; a housing having an inlet coupled to the input flow channel, an outlet coupled to the output flow channel, and a passage between the inlet and the outlet; a cap configured to hold a filter within the passage via at least one leg, the filter concentrically located within the passage; a temperature sensor disposed within the passage and configured to measure a temperature of a fluid flowing through the passage; a flow rate sensor disposed within the passage and configured to measure a flow rate of the fluid flowing through the passage, the flow rate sensor including a flow restriction disposed within the passage; and a flow cassette processor coupled to the temperature sensor and flow rate sensor, the processor configured to accept measurements of temperature and flow rate from the temperature sensor and flow rate sensor, respectively, and provide a compensated flow rate. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification