WO1993019669A3 - Portable spirometer with improved accuracy - Google Patents

Portable spirometer with improved accuracy Download PDF

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Publication number
WO1993019669A3
WO1993019669A3 PCT/US1993/003030 US9303030W WO9319669A3 WO 1993019669 A3 WO1993019669 A3 WO 1993019669A3 US 9303030 W US9303030 W US 9303030W WO 9319669 A3 WO9319669 A3 WO 9319669A3
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
signal
flow sensor
implementing
correction factor
Prior art date
Application number
PCT/US1993/003030
Other languages
French (fr)
Other versions
WO1993019669A2 (en
Inventor
John L Hankinson
Joseph O Viola
Thomas R Ebeling
Original Assignee
Us Health
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Us Health filed Critical Us Health
Priority to US08/307,840 priority Critical patent/US5562101A/en
Publication of WO1993019669A2 publication Critical patent/WO1993019669A2/en
Publication of WO1993019669A3 publication Critical patent/WO1993019669A3/en

Links

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
    • A61B5/0878—Measuring breath flow using temperature sensing means
    • 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
    • A61B5/0823—Detecting or evaluating cough events
    • 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
    • A61B5/091—Measuring volume of inspired or expired gases, e.g. to determine lung capacity

Abstract

A spirometric measurement device (10) includes an arrangement for computation of a dynamic BTPS correction factor, to compensate for temperature-related volume changes due to cooling of expired gas. The correction factor varies in time according to variation of temperature of a flow sensor (18). The temperature of the flow sensor (18) is accurately established by positioning a temperature sensor (20) downstream of the flow sensor (18). Autozeroing drift compensation is provided by addition of a PWM signal having an adjusted DC value. Resolution accuracy is increased beyond the capacity of an analog-to-digital converter used in the circuit by implementing a dithering procedure, wherein zero average noise is superimposed on the signal, or by implementing a modified dithering procedure wherein a sawtooth waveform is added to the flow signal, and oversampling the resultant signal.
PCT/US1993/003030 1992-03-31 1993-03-31 Portable spirometer with improved accuracy WO1993019669A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/307,840 US5562101A (en) 1992-03-31 1993-03-31 Portable spirometer with improved accuracy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/862,625 US5277196A (en) 1992-03-31 1992-03-31 Portable spirometer with improved accuracy
US862,625 1992-03-31

Publications (2)

Publication Number Publication Date
WO1993019669A2 WO1993019669A2 (en) 1993-10-14
WO1993019669A3 true WO1993019669A3 (en) 1994-01-06

Family

ID=25338888

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/003030 WO1993019669A2 (en) 1992-03-31 1993-03-31 Portable spirometer with improved accuracy

Country Status (3)

Country Link
US (2) US5277196A (en)
AU (1) AU3942793A (en)
WO (1) WO1993019669A2 (en)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277196A (en) * 1992-03-31 1994-01-11 The United States Of America As Represented By The Department Of Health And Human Services Portable spirometer with improved accuracy
JP3138052B2 (en) * 1992-04-03 2001-02-26 シャープ株式会社 Infusion device
US5501231A (en) * 1993-06-02 1996-03-26 Kaish; Norman Patient operated system for testing and recording a biological condition of the patient
US5564432A (en) * 1994-07-13 1996-10-15 Thomson; Ronald A. Biodegradable air tube and spirometer employing same
US5479812A (en) * 1994-07-15 1996-01-02 Honeywell Inc. On-site calibration device and method for nonlinearity correction for flow sensor/transmitter
US5816246A (en) * 1994-09-15 1998-10-06 Mirza; M. Zubair Electronic pocket spirometer
US5676132A (en) * 1995-12-05 1997-10-14 Pulmonary Interface, Inc. Pulmonary interface system
IT1287889B1 (en) 1996-01-19 1998-08-26 Biomedin Srl DEVICE WITH SMALL THERMAL CAPACITY FOR PORTABLE PRECISION SPIROMETRY AND FOR OTHER APPLICATIONS
US5746697A (en) * 1996-02-09 1998-05-05 Nellcor Puritan Bennett Incorporated Medical diagnostic apparatus with sleep mode
US5715831A (en) * 1996-06-21 1998-02-10 Desert Moon Development Limited Partnership Calibrated air tube for spirometer
US5743270A (en) * 1996-06-21 1998-04-28 Desert Moon Development Limited Partnership Resistive element for spirometer
US5997483A (en) * 1996-06-21 1999-12-07 Desert Moon Development Limited Partnership Individualized and calibrated air tube for spirometer
FI102918B1 (en) * 1996-07-02 1999-03-15 Instrumentarium Oy Measuring sensor and system for measuring the gas flow
US5693079A (en) * 1996-08-19 1997-12-02 Augustine Medical, Inc. Apparatus and method for simulating an inflatable thermal blanket to test an air source
US5975748A (en) * 1996-09-30 1999-11-02 Ihc Health Services, Inc. Servo lung simulator and related control method
US5827179A (en) * 1997-02-28 1998-10-27 Qrs Diagnostic, Llc Personal computer card for collection for real-time biological data
US6712762B1 (en) 1997-02-28 2004-03-30 Ors Diagnostic, Llc Personal computer card for collection of real-time biological data
US5988876A (en) * 1997-07-15 1999-11-23 Augustine Medical, Inc. Method for measuring temperature of an airflow for an inflatable thermal device
USD411010S (en) * 1997-09-24 1999-06-15 Nellcor Puritan Bennett Single-use disposable spirometry sensor
US5924994A (en) * 1997-09-24 1999-07-20 Nellcor Puritan Bennett Spirometer having individually characterized, single-use disposable sensor
US20050121033A1 (en) * 1998-02-25 2005-06-09 Ric Investments, Llc. Respiratory monitoring during gas delivery
DE19957956A1 (en) * 1999-12-02 2001-06-07 Ruhrgas Ag Method and device for flow measurement of gases and liquids
WO2003005061A1 (en) * 2001-06-30 2003-01-16 Keymaster Technologies, Inc. Digital processing device
US20060100537A1 (en) * 2002-04-03 2006-05-11 Williams David R Spirometer
US7094208B2 (en) 2002-04-03 2006-08-22 Illinois Institute Of Technology Spirometer
CA2386639A1 (en) 2002-05-16 2003-11-16 Dynamic Mt Gmbh Portable electronic spirometer
US6733464B2 (en) 2002-08-23 2004-05-11 Hewlett-Packard Development Company, L.P. Multi-function sensor device and methods for its use
DE10316333B3 (en) * 2003-04-10 2004-01-22 Dräger Safety AG & Co. KGaA Breath alcohol meter with improved mouthpiece
US7282032B2 (en) * 2003-06-03 2007-10-16 Miller Thomas P Portable respiratory diagnostic device
US7104962B2 (en) * 2003-06-24 2006-09-12 Buxco Electronics, Inc. Cough/sneeze analyzer and method
EP1694392A4 (en) * 2003-11-25 2008-05-14 Robert E Coifman Devices for measuring inspiratory airflow
EP1761742A1 (en) * 2004-06-28 2007-03-14 Inogen, Inc. Conserver design for a therapeutic breathing gas system
WO2006043278A1 (en) * 2004-10-20 2006-04-27 Deepbreeze Ltd. Method and system for managing mechanical respiratory ventilation
US8460223B2 (en) * 2006-03-15 2013-06-11 Hill-Rom Services Pte. Ltd. High frequency chest wall oscillation system
US20110009762A1 (en) * 2007-03-08 2011-01-13 FILT Lungen-und Thoraxdiagnostik GmbH Portable pneumotachograph for measuring components of an expiration volume and method therefor
DE102007012330B4 (en) * 2007-03-14 2010-04-01 Ludwig-Maximilians-Universität München Method for classifying measurement results of a pulmonary function test, digital storage medium and spirometer
US20090107500A1 (en) * 2007-10-25 2009-04-30 Sequal Technologies, Inc. Portable Oxygen Concentrator System and Method Including Concentrated Oxygen Flow Delivery
DE102008030536A1 (en) * 2008-06-27 2010-01-07 Sendsor Gmbh Spirometer with exchangeable flow tube
US10330513B2 (en) * 2009-05-27 2019-06-25 Honeywell International Inc. Multi-dynamic-range sensor
JP6185390B2 (en) * 2011-01-31 2017-08-23 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Automated breath curve analysis and interpretation
US9861299B1 (en) * 2011-08-12 2018-01-09 Jones Medical Instrument Company Spirometry-based personal health risk assessment device
US10078074B2 (en) 2013-01-22 2018-09-18 Arizona Board Of Regents On Behalf Of Arizona State University Portable metabolic analyzer system
US9541098B2 (en) 2013-06-28 2017-01-10 Vyaire Medical Capital Llc Low-noise blower
US9746359B2 (en) 2013-06-28 2017-08-29 Vyaire Medical Capital Llc Flow sensor
US9433743B2 (en) 2013-06-28 2016-09-06 Carefusion 303, Inc. Ventilator exhalation flow valve
US9962514B2 (en) 2013-06-28 2018-05-08 Vyaire Medical Capital Llc Ventilator flow valve
US9795757B2 (en) 2013-06-28 2017-10-24 Vyaire Medical Capital Llc Fluid inlet adapter
US9707369B2 (en) 2013-06-28 2017-07-18 Vyaire Medical Capital Llc Modular flow cassette
WO2015036013A1 (en) * 2013-09-10 2015-03-19 Fundació Privada Barcelona Digital Centre Tecnològic Automatic quality control of forced spirometry
JP6960905B2 (en) * 2015-08-26 2021-11-05 コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. Mechanical air supply and exhaust
US10480979B2 (en) * 2016-05-25 2019-11-19 Agilent Technologies, Inc. Flow meters, flow meter cartridges, and related methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328415A1 (en) * 1988-02-10 1989-08-16 Sherwood Medical Company Pulmonary function tester
WO1989012423A1 (en) * 1988-06-17 1989-12-28 Adx Systems Pty Limited Monitoring system
EP0437055A1 (en) * 1990-01-04 1991-07-17 Glaxo Australia Pty., Ltd Spirometer
US5038773A (en) * 1990-06-08 1991-08-13 Medical Graphics Corporation Flow meter system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735752A (en) * 1971-04-07 1973-05-29 J Rodder Spirometer
US4815459A (en) * 1983-01-24 1989-03-28 Beran Anthony V Endotracheal tube connector
EP0132374B1 (en) * 1983-07-20 1988-01-20 Tokyo Tatsuno Company Limited Device for measuring liquid flow volume with temperature compensating
US5060655A (en) * 1988-11-15 1991-10-29 Hans Rudolph, Inc. Pneumotach
US5277196A (en) * 1992-03-31 1994-01-11 The United States Of America As Represented By The Department Of Health And Human Services Portable spirometer with improved accuracy
US5347843A (en) * 1992-09-23 1994-09-20 Korr Medical Technologies Inc. Differential pressure flowmeter with enhanced signal processing for respiratory flow measurement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328415A1 (en) * 1988-02-10 1989-08-16 Sherwood Medical Company Pulmonary function tester
WO1989012423A1 (en) * 1988-06-17 1989-12-28 Adx Systems Pty Limited Monitoring system
EP0437055A1 (en) * 1990-01-04 1991-07-17 Glaxo Australia Pty., Ltd Spirometer
US5038773A (en) * 1990-06-08 1991-08-13 Medical Graphics Corporation Flow meter system

Also Published As

Publication number Publication date
AU3942793A (en) 1993-11-08
WO1993019669A2 (en) 1993-10-14
US5277196A (en) 1994-01-11
US5562101A (en) 1996-10-08

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