Discrimination of cheyne -stokes breathing patterns by use of oximetry signals

A technology of tidal breathing and saturation, which is applied in the field of using blood oxygen saturation signals to distinguish tidal breathing patterns, can solve problems such as unreliable interpretation of blood oxygen data, and achieve the effect of easy operation and low cost

Inactive Publication Date: 2012-05-16
RESMED LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0015] None of these prior art systems can reliably interpret blood oxygen data to relia

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  • Discrimination of cheyne -stokes breathing patterns by use of oximetry signals
  • Discrimination of cheyne -stokes breathing patterns by use of oximetry signals
  • Discrimination of cheyne -stokes breathing patterns by use of oximetry signals

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Embodiment Construction

[0044] Embodiments of the present technology may include: systems, devices, classifiers, and / or methods. Here with reference to the accompanying drawings especially Figure 1-13 and 15, describing examples.

[0045] CSR is a periodic respiration believed to be caused by instability in the control of ventilation by the central nervous system. Respiration in patients with CSR is characterized by ebb and flow of respiratory volume, with recurring episodes between apnea / hypopnea and hyperpnea. Recordings of nasal flow signals on a compressed time scale showed a similar pattern to amplitude-modulated (AM) waves.

[0046] During tidal breathing or CSR cycles, the pattern of waxing and waning changes in respiratory volume that can be seen in the nasal flow signal as a direct test of lung function also exhibits periodic changes in other cardiorespiratory parameters, such as blood oxygen saturation levels. For example, during prolonged periods of apnea, oxygen saturation may decreas...

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Abstract

Methods and apparatus provide Cheyne-Stokes respiration (CSR) detection based on a blood gas measurements such as oximetry. In some embodiments, a duration, such as a mean duration of contiguous periods of changing saturation or re- saturation occurring in an epoch taken from a processed oximetry signal, is determined. An occurrence of CSR may be detected from a comparison of the duration and a threshold derived to differentiate saturation changes due to CSR respiration and saturation changes due to obstructive sleep apnea. The threshold may be a discriminant function derived as a classifier by an automated training method. The discriminant function may be further implemented to characterize the epoch for CSR based on a frequency analysis of the oximetry data. Distance from the discriminant function may be utilized to generate probability values for the CSR detection.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application 61 / 170,734, filed April 20, 2009, the contents of which are incorporated herein by reference. technical field [0003] The technology involves the use of clinical decision-support tools to identify respiratory abnormalities through quantitative measurements of physiological signals. In particular, the technology relates to identifying tidal respiration (CSR) by analyzing blood oxygen saturation signals, optionally in combination with flow signals. The technique may also involve training a classifier capable of providing probability values ​​for the discrimination of CSRs. The present technique may also relate to improving the readout of the blood oxygen saturation signal by removing identifiable artifacts in the CSR background. Background technique [0004] Diagnosis of CSR usually involves performing a sleep study and analyzing the resulting polys...

Claims

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Application Information

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IPC IPC(8): A61B5/087A61B5/1455
CPCA61B5/087G06F19/3443A61B5/7267A61B5/7239A61B5/7257A61B5/14551A61B5/726A61B5/08A61B5/14542A61B5/72A61B5/7264A61B5/4818G16H50/70
Inventor 刘俊睿杰弗里·彼得·阿米斯特德
Owner RESMED LTD
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