WO1998046277A3 - Humidity compensation for fuel cell zeroing in respiratory gas measurement - Google Patents

Humidity compensation for fuel cell zeroing in respiratory gas measurement Download PDF

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Publication number
WO1998046277A3
WO1998046277A3 PCT/US1998/006254 US9806254W WO9846277A3 WO 1998046277 A3 WO1998046277 A3 WO 1998046277A3 US 9806254 W US9806254 W US 9806254W WO 9846277 A3 WO9846277 A3 WO 9846277A3
Authority
WO
WIPO (PCT)
Prior art keywords
fuel cell
humidity
respiratory gas
gas
gas measurement
Prior art date
Application number
PCT/US1998/006254
Other languages
French (fr)
Other versions
WO1998046277A2 (en
Inventor
Kathleen Bergeron Gull
Original Assignee
Ohmeda Inc
Kathleen Bergeron Gull
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 Ohmeda Inc, Kathleen Bergeron Gull filed Critical Ohmeda Inc
Priority to AU68726/98A priority Critical patent/AU6872698A/en
Publication of WO1998046277A2 publication Critical patent/WO1998046277A2/en
Publication of WO1998046277A3 publication Critical patent/WO1998046277A3/en

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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
    • A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption

Abstract

The accuracy of respiratory gas measurements taken by electrochemical fuel cells is affected by changes in humidity. Such changes become more apparent after a monitoring bench containing fuel cells has been zeroed, and then returned to the sampling mode where a measurement is taken of a respiratory gas sample. The difference in humidity between the sampling gas stream, and the zeroing gas stream causes a zero drift in the fuel cell readings. A piece of NAFION tubing (50) is used after the pneumatics manifold (10) which switches between the two gas streams (30, 40) and the fuel cell bench (20) in order to equilibrate the humidity in both the sample (40), and zero gas streams (30).
PCT/US1998/006254 1997-04-16 1998-03-30 Humidity compensation for fuel cell zeroing in respiratory gas measurement WO1998046277A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU68726/98A AU6872698A (en) 1997-04-16 1998-03-30 Humidity compensation for fuel cell zeroing in respiratory gas measurement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4325097P 1997-04-16 1997-04-16
US60/043,250 1997-04-16

Publications (2)

Publication Number Publication Date
WO1998046277A2 WO1998046277A2 (en) 1998-10-22
WO1998046277A3 true WO1998046277A3 (en) 1999-03-04

Family

ID=21926239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/006254 WO1998046277A2 (en) 1997-04-16 1998-03-30 Humidity compensation for fuel cell zeroing in respiratory gas measurement

Country Status (2)

Country Link
AU (1) AU6872698A (en)
WO (1) WO1998046277A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE519779C2 (en) * 2001-08-28 2003-04-08 Phase In Ab Device for quantitative analysis of respiratory gases
SE532941C2 (en) 2008-09-15 2010-05-18 Phasein Ab Gas sampling line for breathing gases

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038792A (en) * 1988-06-29 1991-08-13 Mault James R Oxygen consumption meter
US5042500A (en) * 1990-06-18 1991-08-27 Medical Graphics Corporation Drying sample line
US5284160A (en) * 1991-11-13 1994-02-08 Dryden Gale E Consolidated anesthesia circuit
US5485827A (en) * 1990-12-05 1996-01-23 The General Hospital Corporation Methods and devices for treating plumonary vasoconstriction and asthma
US5558083A (en) * 1993-11-22 1996-09-24 Ohmeda Inc. Nitric oxide delivery system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038792A (en) * 1988-06-29 1991-08-13 Mault James R Oxygen consumption meter
US5042500A (en) * 1990-06-18 1991-08-27 Medical Graphics Corporation Drying sample line
US5485827A (en) * 1990-12-05 1996-01-23 The General Hospital Corporation Methods and devices for treating plumonary vasoconstriction and asthma
US5284160A (en) * 1991-11-13 1994-02-08 Dryden Gale E Consolidated anesthesia circuit
US5558083A (en) * 1993-11-22 1996-09-24 Ohmeda Inc. Nitric oxide delivery system

Also Published As

Publication number Publication date
AU6872698A (en) 1998-11-11
WO1998046277A2 (en) 1998-10-22

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