Source: http://www.google.com/patents/US7766842?dq=6377161
Timestamp: 2015-03-03 05:04:56
Document Index: 772522827

Matched Legal Cases: ['Application No. 04784602', 'Application No. 03790304', 'Application No. 04781543', 'Application No. 04781543', 'Application No. 03790294', 'Application No. 03790294', 'Application No. 2006', 'Application No. 04784602', 'Application No. 04781543', 'Application No. 03790294', 'Application No. 03790304']

Patent US7766842 - Detection of disordered breathing - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsDevices and methods for detecting disordered breathing involve determining that the patient is asleep and sensing one or more signals associated with disordered breathing indicative of sleep-disordered breathing while the patient is asleep. Sleep-disordered breathing is detected using the sensed signals...http://www.google.com/patents/US7766842?utm_source=gb-gplus-sharePatent US7766842 - Detection of disordered breathingAdvanced Patent SearchPublication numberUS7766842 B2Publication typeGrantApplication numberUS 11/890,404Publication dateAug 3, 2010Filing dateAug 6, 2007Priority dateDec 4, 2002Fee statusPaidAlso published asEP1567051A2, EP1567051B1, US7252640, US8475388, US20040111040, US20070282215, US20100324438, WO2004049930A2, WO2004049930A3Publication number11890404, 890404, US 7766842 B2, US 7766842B2, US-B2-7766842, US7766842 B2, US7766842B2InventorsQuan Ni, John D. Hatlestad, Jesse W. Hartley, Jeff E. Stahmann, Jaeho Kim, Kent LeeOriginal AssigneeCardiac Pacemakers, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (62), Non-Patent Citations (61), Referenced by (2), Classifications (14), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetDetection of disordered breathing
US 7766842 B2Abstract
a respiration sensor configured to sense respiration of a patient and to generate a respiration signal;
an artifact sensor configured to sense a signal indicative of non-respiration related artifacts and to generate an artifact signal;
a disordered breathing detector configured to avoid erroneous detections of disordered breathing based on the artifact signal, the disordered breathing detector further configured to determine characteristics of the respiration signal, including at least determining one or both of tidal volumes and breath intervals from the respiration signal, to compare the characteristics of the respiration signal to one or more respiration metrics, and to detect the disordered breathing based on the comparison, the disordered breathing detector further configured to determine characteristics of the disordered breathing, including at least an apnea/hypopnea index;
a memory coupled to the disordered breathing detector and configured to store the characteristics of disordered breathing; and
a sleep detector configured to determine if the patient is awake or asleep based on a sleep threshold that is adjustable using another sleep-related signal.
2. The device of claim 1, wherein the sleep threshold is a patient activity threshold and the other sleep-related signal is a minute ventilation signal.
a disordered breathing detector configured to avoid erroneous detections of disordered breathing based on the artifact signal, the disordered breathing detector further configured to determine characteristics of the respiration signal, including at least determining one or both of tidal volumes and breath intervals from the respiration signal, to compare the characteristics of the respiration signal to one or more respiration metrics, and to detect the disordered breathing based on the comparison, the disordered breathing detector further configured to determine characteristics of the disordered breathing, including at least an apnea/hypopnea index; and
a memory coupled to the disordered breathing detector and configured to store the characteristics of disordered breathing;
wherein the disordered breathing detector is configured to analyze the respiration pattern using the respiration metrics and detect mixed apnea and hypopnea or Cheyne Stokes respiration based on the analysis.
wherein the disordered breathing detector is configured to discriminate between apnea, hypopnea, and mixed apnea and hypopnea disordered breathing episodes.
wherein the disordered breathing detector is configured to determine a duration of an ongoing disordered breathing episode and to discriminate between apnea, hypopnea, and mixed apnea and hypopnea if the disordered breathing duration exceeds an event duration threshold.
a respiration sensor configured to sense respiration of the patient and generate a respiration signal;
a sensor configured to generate a signal indicative of non-respiration related artifacts;
means for avoiding erroneous detections of disordered breathing based on the sensed artifact signal;
means for determining characteristics of the respiration signal, including at least determining one or both of tidal volumes and breath intervals of the respiration signal, comparing the characteristics of the respiration signal to one or more respiration metrics, detecting the disordered breathing based on the comparison, and determining characteristics of the disordered breathing, including at least an apnea/hypopnea index;
a memory configured to store the characteristics of the sleep disordered breathing in the implantable device; and
means for determining if the patient is asleep based on a sleep threshold that is adjustable using another sleep-related signal.
means for discriminating between apnea, hypopnea, and mixed apnea and hypopnea disordered breathing episodes.
8. An implantable medical system, comprising:
a memory configured to store the characteristics of the sleep disordered breathing in the implantable device;
means for determining a duration of the disordered breathing; and
means for discriminating between apnea, hypopnea, and mixed apnea and hypopnea if the disordered breathing duration exceeds an event duration threshold.
sleep detection means for detecting sleep based on a plurality of sleep-related signals and at least a first sleep threshold, the sleep detection means providing a sleep indication to the means for determining characteristics of the respiration signal.
10. The system of claim 9, wherein the sleep detection means compares a first signal value for one of the sleep-related signals to the first sleep threshold, and adjusts the first sleep threshold based on another of the sleep-related signals.
a sleep detector configured to determine the patient's sleep status based on a plurality of sleep-related signals and at least a first sleep threshold, the sleep detector providing the determined sleep status to the disordered breathing detector.
12. The device of claim 11, wherein the sleep detector is configured to compare a first signal value for one of the sleep-related signals to the first sleep threshold, and wherein the sleep detector is further configured to adjust the first sleep threshold based on another of the sleep-related signals.
13. The device of claim 12, wherein the plurality of sleep-related signals comprise an accelerometer signal and the respiration signal.
This application is a division of U.S. patent application Ser. No. 10/309,770 filed on Dec. 4, 2002, and issued as U.S. Pat. No. 7,252,640 which is incorporated herein by reference.
Testing in a sleep laboratory setting presents a number of obstacles in acquiring an accurate picture of a patient's typical sleep patterns. For example, spending a night in a laboratory typically causes a patient to experience a condition known as �first night syndrome,� involving disrupted sleep during the first few nights in an unfamiliar location. Furthermore, sleeping while instrumented and observed may not result in a realistic perspective of the patient's normal sleep patterns.
The outputs of sensors 101, 102, 103, 104 are received by a sensor driver/detector system 110 having detection circuitry 121, 122, 123, 124, that may include, for example, amplifiers, signal processing circuitry, timing, and/or A/D conversion circuitry for each sensor output. The driver/detector system 110 may further include sensor drive circuitry 111, 112, 113, 114 as required to activate the sensors 101, 102, 103, 104.
FIG. 17 is a flow chart of a method for detecting disordered breathing by classifying breathing patterns using breath intervals in conjunction with tidal volume and duration thresholds as described in connection with FIGS. 14-16 above. In this example, a duration threshold and a tidal volume threshold are established for determining both apnea and hypopnea breath intervals. An apnea episode is detected if the breath interval exceeds the duration threshold. A hypopnea episode is detected if the tidal volume of successive breaths remains less than the tidal volume threshold for a period in excess of the duration threshold. Mixed apnea/hypopnea episodes may also occur. In these cases, the period of disordered breathing is characterized by shallow breaths or non-breathing intervals. During the mixed apnea/hypopnea episodes, the tidal volume of each breath remains less than the tidal volume threshold for a period exceeding the duration threshold.
If a breath interval exceeds 1715 the duration threshold, then the respiration pattern is consistent with an apnea event, and an apnea event trigger is turned on 1720. If the tidal volume of the breath interval exceeds 1725 the tidal volume threshold, then the breathing pattern is characterized by two respiration cycles of normal volume separated by a non-breathing interval. This pattern represents a purely apneic disordered breathing event, and apnea is detected 1730. Because the final breath of the breath interval was normal, the apnea event trigger is turned off 1732, signaling the end of the disordered breathing episode. However, if the tidal volume of the breath interval does not exceed 1725 the tidal volume threshold, the disordered breathing period is continuing and the next breath is checked 1710.
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No. 11/717,561, filed Mar. 13, 2007, Ni et al.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8317719Apr 26, 2011Nov 27, 2012Cardiac Pacemakers, Inc.Apparatus and method for detecting lung sounds using an implanted deviceUS8323204 *Mar 13, 2009Dec 4, 2012Cardiac Pacemakers, Inc.Medical event logbook system and method* Cited by examinerClassifications U.S. Classification600/538, 600/532International ClassificationA61B5/00, A61B5/0205Cooperative ClassificationA61B5/4809, A61B5/7264, A61B5/4818, A61B5/0205, A61B5/4806European ClassificationA61B5/48C8, A61B5/48C2, A61B5/48C, A61B5/72K12, A61B5/0205Legal EventsDateCodeEventDescriptionJan 8, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services