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Title: US6688307: Methods and apparatus for determining instantaneous elastic recoil and assistance pressure during ventilatory support
[ Derwent Title ]

Country: US United States of America

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43 pages

 
Inventor: Berthon-Jones, Michael; Leonay, Australia

Assignee: ResMed Limited, North Ryde, Australia
other patents from RESMED LIMITED, AN AUSTRALIAN COMPANY (739811) (approx. 102)
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Published / Filed: 2004-02-10 / 2002-03-12

Application Number: US2002000095904
IPC Code: Advanced: A61B 5/08; A61B 5/085; A61B 5/087; A61M 16/00;
IPC-7: A61M 16/00;

ECLA Code: A61M16/00K; A61B5/085; A61B5/087; A61M16/00; K61M16/00A14B2; K61M16/00M6P; K61M16/00A8B2; K61M205/15;

U.S. Class: 128/204.21;

Field of Search: 128/200.24,204.21,204.23,204.18 600/533,538 700/050 706/7-9

Priority Number:
1996-09-23  AU1996000002474

Abstract:     The apparatus provides for the determination of the instantaneous phase in the respiratory cycle, subject's average respiration rate and the provision of ventilatory assistance. A microprocessor (16) receives an airflow signal from a pressure transducer (18) coupled to a port (17) at a mask (11). The microprocessor (16) controls a servo (19), that in turn controls the fan motor (20) and thus the pressure of air delivered by the blower (10). The blower (10) is coupled to a subject's mask (ii) by a conduit (12). The invention seeks to address the following goals: while the subject is awake and making substantial efforts the delivered assistance should be closely matched in phase with the subject's efforts; the machine should automatically adjust the degree of assistance to maintain at least a specified minimum ventilation without relying on the integrity of the subject's chemoreflexes; and it should continue to work correctly in the pesence of large leaks.

Attorney, Agent or Firm: Gottlieb, Rackman & Reisman P.C. ;

Primary / Asst. Examiners: Lewis, Aaron J.;

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Related Applications:
Application Number Filed Patent Pub. Date  Title
US1997000935785 1997-09-23       


       
Parent Case:     This application is a continuation of co-pending U.S. patent application Ser. No. 08/935,785, which was filed on Sep. 23, 1997.

Family: Show 90 known family members
First Claim:
Show all 64 claims		 What is claimed is:     1. A method for determining an instantaneous elastic recoil pressure comprising the steps of:
  • specifying an elastance for a subject;
  • providing the subject with ventilatory support;
  • determining a measure of respiratory airflow;
  • determining an index value representing an extent to which a leak is suddenly changing using said measure of respiratory airflow;
  • calculating an inspired volume of airflow as a function of said measure of respiratory airflow and said index value and;
  • calculating said instantaneous elastic recoil pressure as a function of said inspired volume and said elastance.
    •


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Description: Show description

Forward References: Show 14 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (14)   |   Backward references (300)   |   Citation Link

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Get PDF - 40pp WO9534917 1995-12  A61B 17/00 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA CANTILEVER PRESSURE TRANSDUCER 
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Get PDF - 26pp WO9632055 1996-10  A61B 5/00 BRYDON JOHN WILLIAM ERNEST MONITORING THE OCCURRENCE OF APNEIC AND HYPOPNEIC AROUSALS 
Get PDF - 27pp WO9636279 1996-11  A61B 5/08 SOMED PTY LIMITED DEVICE FOR DETECTING AND RECORDING SNORING 
Get PDF - 23pp WO9639216 1996-12  A61M 16/00 GERIYS SALEEM N HIGH-FREQUENCY FAN VENTILATOR 
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    • Continuity Data:
    Application Number Filed Notes
    >US2002000095904< 2002-03-12  is a continuation of
    US1997000935785  1997-09-23   (pending) [presumed granted]
         US6532957 issued 2003-03-18   Assisted ventilation to match patient respiratory need


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