CA2516570A1 - Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system - Google Patents

Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system Download PDF

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Publication number
CA2516570A1
CA2516570A1 CA002516570A CA2516570A CA2516570A1 CA 2516570 A1 CA2516570 A1 CA 2516570A1 CA 002516570 A CA002516570 A CA 002516570A CA 2516570 A CA2516570 A CA 2516570A CA 2516570 A1 CA2516570 A1 CA 2516570A1
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CA
Canada
Prior art keywords
gas
measurement system
gas measurement
output
sample cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002516570A
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French (fr)
Other versions
CA2516570C (en
Inventor
Anthony T. Pierry
David R. Rich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Respironics Inc
Original Assignee
Ric Investments, Inc.
Anthony T. Pierry
David R. Rich
Ric Investments, Llc
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Application filed by Ric Investments, Inc., Anthony T. Pierry, David R. Rich, Ric Investments, Llc filed Critical Ric Investments, Inc.
Publication of CA2516570A1 publication Critical patent/CA2516570A1/en
Application granted granted Critical
Publication of CA2516570C publication Critical patent/CA2516570C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/087—Measuring breath flow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
    • A61B2562/225—Connectors or couplings
    • A61B2562/226—Connectors or couplings comprising means for identifying the connector, e.g. to prevent incorrect connection to socket
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0106—General arrangement of respective parts
    • G01N2021/0118—Apparatus with remote processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0193—Arrangements or apparatus for facilitating the optical investigation the sample being taken from a stream or flow to the measurement cell
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/05—Flow-through cuvettes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/12—Circuits of general importance; Signal processing
    • G01N2201/121—Correction signals
    • G01N2201/1215—Correction signals for interfering gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath

Abstract

A method and apparatus for interfacing a plurality of gas measurement systems (8, 28, 60), including a mainstream and a sidestream gas measurement system, to a host system (74) via an interface unit (64). The present invention also pertains to a sidestream gas measurement system (80) that outputs signals emulating the signals output by a mainstream gas measurement system or portion thereof, so that the sidestream gas measurement system can seamlessly communicate with a host system configured to communicate only a mainstream gas measurement system or a portion thereof.

Claims (8)

1. A respiratory gas monitoring system comprising:
an interface unit (64) having a input coupling (66) and an output (68); and a plurality of gas measurement systems (8, 28, 60), wherein each gas measurement system is adapted to be placed in fluid communication with an airway of a patient to measure at least one respiratory gas, wherein each gas measurement system has an output coupling (70a, 70b, 70c) that is adapted to be removable coupled to the input coupling of the interface unit, and wherein each gas measurement system includes processing means (22) for determining, from the respiratory gas, at least one respiratory variable of such a patient and for providing an output to the interface unit via the output coupling.
2. The respiratory gas monitoring system of claim 1, wherein the plurality of gas measurements systems include a sidestream gas measurement system and a mainstream gas measurement system.
3. The respiratory gas monitoring system of claim 1, wherein the output of the interface unit is a hardwired communication link (72) or a wireless communication link.
4. A method of respiratory gas monitoring comprising the steps of:
providing an interface unit (64) having a input coupling (66) and an output (68);
providing a plurality of gas measurement systems(8, 28, 60), wherein each gas measurement system has an output coupling (70a, 70b, 70c), and wherein each gas measurement system includes processing means (22) for determining, from the respiratory gas, at least one respiratory variable of such a patient and for providing an output to the interface unit via the output coupling; and selectively coupling one of the plurality of gas measurement systems to the interface unit by coupling the output coupling of an associated gas measurement system with the input coupling of the interface unit.
5. The method of claim 4, further comprising:
operatively coupling the output of the interface device to a host system (74); and communicating the at least one respiratory gas variable from the gas measurement system to the host system via the interface unit.
6. A sidestream gas measurement system (80) adapted to communicate with a host system (86) that is configured to communicate only with a mainstream gas measurement system, the sidestream gas measurement system comprising:
a housing (36);
a sample cell connector (83) associated with the housing and adapted to receive a sample cell;
a gas sensor (82) disposed in the housing relative to the sample cell connector so as to be in communication with the sample cell responsive to the sample cell being received in the sample cell connector, and wherein the gas sensor outputs a signal indicative of a property of a gas in the sample cell;
emulation means (84), receiving the signal from the gas sensor, and using the signal in an output signal to simulate signals of output by a mainstream gas measurement system; and a communication element (88) operatively coupled to the emulation means to interface the sidestream gas measurement system with such a host system.
7. A sidestream gas measurement system (80), comprising:
a first conduit (30) having a first end adapted to be placed in fluid communication with a patient circuit (12) and a second end;
a sample cell (81) disposed at the second end of the first conduit;

a gas sensor (82,) operatively coupled to the sample cell, wherein the gas sensor outputs a signal indicative of a property of a gas;
a processing element (24) adapted to receive the signal and to determine a respiratory gas variable based on the signal; and a host system interface (88) configured to communicate an output of the processor with a host system configured to interface only with a mainstream gas measurement system, and wherein the processing element configures signals provided by the host system interface to emulate signals provided by a mainstream gas measurement system or portion thereof.
8. A method of gas monitoring comprising the steps of:
connecting a first conduit (30) with an airway of a patient;
communicating a flow of gas through the first conduit to a sample cell (81);
measuring a property of gas in the sample cell via a gas sensor operatively coupled to the sample cell;
emulating signals provided by a mainstream gas measurement system or portion thereof including the measured property; and providing the signals to a host system configured to interface only with a mainstream gas measurement system.
CA2516570A 2003-02-21 2004-02-19 Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system Expired - Fee Related CA2516570C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US44942803P 2003-02-21 2003-02-21
US60/449,428 2003-02-21
US10/781,382 US6954702B2 (en) 2003-02-21 2004-02-18 Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system
US10/781,382 2004-02-18
PCT/US2004/005178 WO2004076944A2 (en) 2003-02-21 2004-02-19 Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system

Publications (2)

Publication Number Publication Date
CA2516570A1 true CA2516570A1 (en) 2004-09-10
CA2516570C CA2516570C (en) 2012-05-08

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CA2516570A Expired - Fee Related CA2516570C (en) 2003-02-21 2004-02-19 Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system

Country Status (10)

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US (5) US6954702B2 (en)
EP (2) EP2116848B1 (en)
JP (1) JP4613159B2 (en)
CN (1) CN1839311B (en)
AT (1) ATE467121T1 (en)
AU (1) AU2004214962B2 (en)
BR (1) BRPI0407739A (en)
CA (1) CA2516570C (en)
DE (1) DE602004027023D1 (en)
WO (1) WO2004076944A2 (en)

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EP1620683A2 (en) 2006-02-01
US20060052950A1 (en) 2006-03-09
EP2116848A1 (en) 2009-11-11
EP1620683A4 (en) 2007-06-13
BRPI0407739A (en) 2006-02-14
AU2004214962A1 (en) 2004-09-10
US6954702B2 (en) 2005-10-11
ATE467121T1 (en) 2010-05-15
CA2516570C (en) 2012-05-08
CN1839311A (en) 2006-09-27
US7606668B2 (en) 2009-10-20
JP4613159B2 (en) 2011-01-12
WO2004076944A2 (en) 2004-09-10
EP1620683B1 (en) 2010-05-05
CN1839311B (en) 2011-11-23
US20040186391A1 (en) 2004-09-23
DE602004027023D1 (en) 2010-06-17
US20100137729A1 (en) 2010-06-03
JP2006519638A (en) 2006-08-31
AU2004214962B2 (en) 2009-09-10
US7684931B2 (en) 2010-03-23
EP2116848B1 (en) 2013-01-16
US20080058667A1 (en) 2008-03-06
US20080114223A1 (en) 2008-05-15
WO2004076944A3 (en) 2006-03-23

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