Validity test adaptive constraint modification for cardiac data used for detection of state changes
First Claim
1. A medical device, comprising:
- a sensor adapted to detect a candidate heart beat;
a cardiac data collection module operatively coupled to said sensor, said cardiac data collection module adapted to obtain a time series of fiducial time markers for candidate heart beats;
a constraint-modifying heart beat validation module operatively coupled to said sensor and said cardiac data collection module, said constraint-modifying heart beat validation module adapted to identify valid heart beats from said candidate heart beats by subjecting a plurality of said candidate heart beats to at least one beat validity test, said at least one beat validity test comprising at least one interbeat interval test applied to a candidate heart beat interval derived from a candidate heart beat and at least one prior heart beat, and accept as valid heart beats the candidate heart beats that pass said at least one beat validity test, wherein a constraint defining said pass is modified after the most recent prior valid heart beat that is greater than a constraint modification time threshold;
a seizure detection module configured to detect an epileptic seizure using a seizure detection algorithm based on said accepted valid heart beats; and
at least one responsive action module adapted to perform at least one action based upon an epileptic seizure detected by said seizure detection module, the responsive action module selected from the group consisting of;
a neurostimulation delivery module;
a warning module; and
a modified constraint logging module.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods, systems, and apparatus for quantifying the quality of a fiducial time marker for a candidate heart beat, quantifying the quality of a candidate heart beat, or determining a time of beat sequence of the patient'"'"'s heart. A fiducial time marker is obtained for a candidate heart beat. A quality index of said candidate heart beat is set to a first value. The candidate heart beat is tested with at least one beat validity test. At least a second value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least one beat validity test. The candidate heart beat is tested with at least a second heart beat validity test. At least a third value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least second heart beat validity test. In one class of beat validity test, a constraint defining a pass is modified at one or more times after the most recent prior valid heart beat that is greater than a constraint modification time threshold.
-
Citations
19 Claims
-
1. A medical device, comprising:
-
a sensor adapted to detect a candidate heart beat; a cardiac data collection module operatively coupled to said sensor, said cardiac data collection module adapted to obtain a time series of fiducial time markers for candidate heart beats; a constraint-modifying heart beat validation module operatively coupled to said sensor and said cardiac data collection module, said constraint-modifying heart beat validation module adapted to identify valid heart beats from said candidate heart beats by subjecting a plurality of said candidate heart beats to at least one beat validity test, said at least one beat validity test comprising at least one interbeat interval test applied to a candidate heart beat interval derived from a candidate heart beat and at least one prior heart beat, and accept as valid heart beats the candidate heart beats that pass said at least one beat validity test, wherein a constraint defining said pass is modified after the most recent prior valid heart beat that is greater than a constraint modification time threshold; a seizure detection module configured to detect an epileptic seizure using a seizure detection algorithm based on said accepted valid heart beats; and at least one responsive action module adapted to perform at least one action based upon an epileptic seizure detected by said seizure detection module, the responsive action module selected from the group consisting of; a neurostimulation delivery module; a warning module; and a modified constraint logging module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A medical device, comprising:
-
a data collection module adapted to receive a time series of fiducial time markers for candidate heart beats; and a constraint-modifying heart beat validation module operatively coupled to said data collection module, said constraint-modifying heart beat validation module adapted to identify valid heart beats from said candidate heart beats by subjecting a plurality of said candidate heart beats to at least one beat validity test, said at least one beat validity test comprising at least one interbeat interval test applied to a candidate heart beat interval derived from a candidate heart beat and at least one prior heart beat, and accept as valid heart beats the candidate heart beats that pass said at least one beat validity test, wherein a constraint defining said pass is modified after the most recent prior valid heart beat that is greater than a constraint modification time threshold; a seizure detection module configured to detect an epileptic seizure using a seizure detection algorithm based on said accepted valid heart beats; and at least one responsive action module adapted to perform at least one action based upon an epileptic seizure detected by said seizure detection module, the responsive action module selected from the group consisting of; a neurostimulation delivery module; a warning module; and a modified constraint logging module. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A system, comprising:
-
a sensor adapted to detect a candidate heart beat of a patient; a medical device operatively coupled to said sensor, said medical device comprising; a cardiac data collection module operatively coupled to said sensor, said cardiac data collection module adapted to obtain a time series of fiducial time markers for candidate heart beats; a constraint-modifying heart beat validation module operatively coupled to said sensor and said cardiac data collection module, said constraint-modifying heart beat validation module adapted to identify valid heart beats from said candidate heart beats by subjecting a plurality of said candidate heart beats to at least one beat validity test, said at least one beat validity test comprising at least one interbeat interval test applied to a candidate heart beat interval derived from a candidate heart beat and at least one prior heart beat, and accept as valid heart beats the candidate heart beats that pass said at least one beat validity test, wherein a constraint defining said pass is modified after the most recent prior valid heart beat that is greater than a constraint modification time threshold; a seizure detection module configured to detect an epileptic seizure using a seizure detection algorithm based on said accepted valid heart beats; and at least one responsive action module adapted to perform at least one action based upon an epileptic seizure detected by said seizure detection module, the responsive action module selected from the group consisting of; a neurostimulation delivery module; a warning module; and a modified constraint logging module; and an electrode operatively coupled to said medical device and to a portion of said patient'"'"'s body, wherein said electrode is capable of delivering a neurostimulation therapy to said portion of said patient'"'"'s body. - View Dependent Claims (17, 18, 19)
-
Specification