Indirect calorimetry system
First Claim
Patent Images
1. An indirect calorimetry system comprising:
- a plurality of transducers sensitive to expired airflow;
a calorimeter housing enclosing the plurality of transducers;
a microprocessor in communication with the plurality of transducers for calculating expiration characteristics;
an intravenous pumping device under feedback based upon the expiration characteristics; and
a graphical display displaying the expiration characteristics.
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Abstract
An indirect calorimetry system includes transducers sensitive to expired airflow that are enclosed within a calorimeter housing, and a microprocessor in communication with the transducers for calculating expiration characteristics. A graphical display displays the expiration characteristics. A communication link transmits expiration characteristics to external devices such as a computer, communication network, or PDA.
367 Citations
30 Claims
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1. An indirect calorimetry system comprising:
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a plurality of transducers sensitive to expired airflow;
a calorimeter housing enclosing the plurality of transducers;
a microprocessor in communication with the plurality of transducers for calculating expiration characteristics;
an intravenous pumping device under feedback based upon the expiration characteristics; and
a graphical display displaying the expiration characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An indirect calorimetry system comprising:
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a plurality of transducers sensitive to expired airflow;
a calorimeter housing enclosing the plurality of transducers;
a microprocessor in communication with the plurality of transducers for calculating expiration characteristics;
a communications link to a device selected from the group consisting of;
a computer, a communication network, and a PDA; and
an intravenous pumping device under feedback control based upon the expiration characteristics. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An indirect calorimetry system comprising:
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a plurality of transducers sensitive to expired airflow;
a housing enclosing the plurality of transducers;
a microprocessor in communication with the plurality of transducers for calculating expiration characteristics; and
an intravenous pumping device under feedback control based upon the calculated expiration characteristics.
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29. An indirect calorimetry system comprising:
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a plurality of transducers sensitive to expired airflow;
a housing enclosing the plurality of transducers;
a microprocessor in communication with the plurality of transducers for calculating expiration characteristics;
a communications link to a device selected from the group consisting of;
a computer, a communication network, and a PDA; and
an intravenous pumping device under feedback control based upon the expiration characteristics.
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30. A method for monitoring a respiratory characteristic of a patient, said method comprising the steps of:
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providing a monitoring system comprising;
a source/sync of respiratory gasses;
a mouthpiece;
a chamber in fluid communication with said mouthpiece and said source/sync;
a flow path in communication with said mouthpiece;
a flow tube disposed in said chamber, in concentric relationship therewith, said flow tube being disposed so that at least a portion of said flow path will pass through said flow tube;
a plurality of ultrasonic transducers disposed in said flow path, said transducers being operable to generate a signal corresponding to a flow of a gas through said flow path; and
a microprocessor in communication with said plurality of transducers, said microprocessor being operable to receive said signal and calculate one or more of;
flow rate, flow profile and flow volume, of a gas passing through said flow path;
directing a patient to breathe through said mouthpiece so as to generate a flow of gas therethrough;
operating the microprocessor so as to calculate said characteristic of the flow of gas initiated by said patient; and
determining a respiratory characteristic of said patient from said at least one expiration characteristic, said respiratory characteristic being selected from the group consisting of;
peak flow rate, forced vital capacity (FVC), and forced exhaled volume in one second (FEV1).
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Specification