Metabolic measurement system including a multiple function airway adapter
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A technology of metabolism and measurement system, applied in the direction of diagnostic recording/measurement, sensor, and evaluation of respiratory organs, etc., which can solve problems such as respiratory circuit obstruction and increased volume
Active Publication Date: 2009-12-09
RIC INVESTMENTS LLC
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This "stacking" of multiple sensors in the patient's airway is cumbersome and adds undesirable volume (dead space) and obstruction to the breathing circuit
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[0084] Figure 1-5 An exemplary airway adapter 20 embodying the teachings of the present invention is shown. The airway adapter 20 is preferably a one-piece, injection molded plastic component, thereby providing low manufacturing costs and allowing the sensor to be discarded after a single use. A separate transducer housing 22 houses an infrared emitter 252, an infrared detector 254, Luminescence excitation radiation source 256 and luminescence detector 258 ( Figure 6 ). However, such a configuration is not necessary. As shown, the airway adapter 20 has a substantially parallelepiped central portion 32 between, and in contact with, the first tubular portion 24 and the second tubular portion 26. Axially aligned, flow passage 34 extends through airway adapter 20 in an end-to-end manner.
[0085] The illustrated airway adapter 20 is configured to connect to a breathing circuit that communicates with a patient's airway. The airway adapter 20 is connectable between a patient ...
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Abstract
A system (300) for measuring a metabolic parameter. The system includes an integrated airway adapter (20, 100, 200) capable of monitoring any combination of respiratory flow, O2 concentration, and concentrations of one or more of CO2, N2O, and an anesthetic agent in real time, breath by breath. Respiratory flow may be monitored with differential pressure flow meters under diverse inlet conditions through improved sensor configurations which minimize phase lag and dead space within the airway. Molecular oxygen concentration may be monitored by way of luminescence quenching techniques. Infrared absorption techniques may be used to monitor one or more of CO2, N2O, and anesthetic agents.
Description
[0001] priority claim [0002] Pursuant to 35 U.S.C. §120 / 365, this application is a continuation-in-part of U.S. Patent Application No. 11 / 701,187 filed February 1, 2007; U.S. Patent Application No. 11 / 701,187 filed April 24, 2001 Filed a continuation-in-part of currently pending U.S. Patent Application No. 09 / 841,451; U.S. Patent Application No. 09 / 841,451 is a continuation-in-part of: (a) U.S. Patent Application No. .09 / 092,260, currently U.S. Patent No. 6,312,389, U.S. Patent Application No. 09 / 092,260 is a continuation of U.S. Patent Application No. 08 / 680,492, currently U.S. Patent No. 5,789,660, filed July 15, 1996 applications; (b) U.S. Patent Application No. 09 / 128,897, filed August 4, 1998, now U.S. Patent No. 6,815,211; and (c) U.S. Patent Application No. 09 / 1998, filed August 4, 1998 128,918, currently US Patent No. 6,325,978. technical field [0003] The present invention relates to a metabolic measurement system using a multifunctional airway adapter that monit...
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