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Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing

A non-invasive, breathing effort technology that can be used in respirator, app, drug devices, etc., to solve problems such as differences in obstructive sleep apnea, limiting average mask pressure, etc.

Inactive Publication Date: 2013-05-08
RESMED LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The problem with known devices is the difference between obstructive sleep apnea (OSA) and central sleep apnea (CSA)
[0013] Yet another problem with known devices involves defining the mean mask pressure

Method used

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  • Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing
  • Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing
  • Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing

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Embodiment Construction

[0039] Pulse oximetry plethysmography (sometimes called "pulse oximetry" or "photoplethysmography") is the standard method for obtaining blood oxygenation data in a non-invasive and continuous manner. Oximeters use two wavelengths of light to determine hemoglobin saturation. Absorption by the pulsatile arterial blood volume produces a waveform that represents an alternating current (AC) signal. Absorption by non-pulsatile blood, venous and capillary blood, and tissue absorption is represented by a direct current (DC) signal. See "Use of Pulse Oximetry to Recognize Severity of Airflow Obstruction in Obstructive Airway Disease, Correlation with Pulsus Paradoxus" by Hartert et al., Chest 1999:115:475-481. The pulse oximeter signal obtained by Harter et al. figure 1 shown in .

[0040] Current pulse oximeters are primarily used to monitor SpO2 and heart rate, but according to an embodiment of the present invention, pulse oximeters are used in respiratory therapy devices as indi...

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Abstract

An air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator. An existing problem for known devices includes discriminating between obstructive sleep apnea (OSA) and central sleep apnea (CSA). OSA is indicative of upper airway collapse and can be used as an input to auto-titration algorithms for the CPAP pressure applied or the end-expiratory pressure (EEP) used in a bi-level device. If these parameters were available in real-time in a flow generator, they could be used to (a) contribute to auto-titration algorithms and (b) be recorded with respiratory specific parameters to allow physicians to observe long-term trends and have a richer data set to determine the long term management of the patient.

Description

[0001] The application number is 200580034088.8 (international application number is PCT / AU2005 / 001543), the application date is October 6, 2005, and the title of the invention is "Method and device for non-invasive monitoring of respiratory parameters in sleep-disordered breathing" divisional application of the patent application. [0002] Cross References to Related Applications [0003] This application claims priority to U.S. Provisional Application No. 60 / 615,961, filed October 6, 2004, and U.S. Provisional Application No. 60 / 629,612, filed November 22, 2004, each of which is incorporated herein in its entirety Reference. technical field [0004] The present invention relates to monitoring parameters related to sleep disordered breathing (SDB). Background technique [0005] Sleep-disordered breathing (SDB) is generally considered to be related to obstructive sleep apnea (OSA) and tidal breathing (CSR, Cheyne-Stokes Respiration). Many other conditions are currently th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00
CPCA61M2016/0039A61M2230/205A61M16/0051A61M2230/04A61B5/7282A61B5/0826A61B5/087A61B5/1455A61B5/7278A61M16/026A61M16/0003A61M16/0057A61M2016/003A61M2230/005A61M2230/42
Inventor 约翰·戴维·奥茨戴恩·查理·丘·马丁
Owner RESMED LTD
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