Decision support system to detect the presence of artifacts in patients monitoring signals using morphograms
AssigneeKoninklijke Philips Electronics N.V.
InventorsWalid Ali, Christopher Hall
Life of this patent
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Abstract
A method for monitoring a patient (110) includes determining (114) convex hulls for pairs of monitored signals from the patient, and determining whether a perturbation has occurred (115, 116) in one or more of the convex hulls. This exemplary embodiment (110) can also include alerting an operator that a clinically significant change may have occurred (117) in the patient each of the convex hulls has been perturbed. If only a subset of the convex hulls is perturbed, an artifact has probably occurred (118).
Claims24
A method for monitoring a patient comprising:
- determining a first convex hull for a first plurality of points, each point of the first plurality of points having a first coordinate being a value of a first monitored signal at a specific moment in time, and having a second coordinate being a value of a second monitored signal at the specific moment in time;
- determining a second convex hull for a second plurality of points, each point of the second plurality of points having a first coordinate being a value of a third monitored signal at a specific moment in time, and having a second coordinate being a value of a fourth monitored signal at the specific moment in time;
- monitoring the first and second convex hulls to determine whether a perturbation has occurred in either of the first and second convex hulls;
- determining, upon detecting a perturbation in one of the first and second convex hulls, whether a perturbation has occurred in the other of the first and second convex hulls;
- and
- alerting an operator that a clinically significant change may have occurred in the patient if both the first and second convex hulls have been perturbed.
A method for monitoring a patient comprising:
- determining a plurality of convex hulls for a plurality of pairs of monitored signals from the patient;
- and
- determining whether a perturbation has occurred in one or more of the plurality of convex hulls.
A method for monitoring a patient comprising:
- determining a plurality of convex hulls for a plurality of pairs of monitored signals from the patient;
- and
- indicating a potentially clinically significant change based on a determination that a perturbation has occurred in a predetermined portion of the plurality of convex hulls.
A method for monitoring a patient comprising:
- indicating that a clinically significant change may have occurred in the patient if perturbations exist in a plurality of convex hulls of a plurality of plots of monitored signal pairs;
- and
- indicating that an artifact may exist in one or more of a plurality of monitored signals if a perturbation exists only in a subset of the plurality of convex hulls of the plurality of plots of monitored signal pairs and not in a remaining plurality of convex hulls of the plurality of plots of monitored signal pairs.
An apparatus for monitoring a patient comprising:
- a plurality of leads, each receiving a monitored signal from the patient;
- a memory to store a value of each of the plurality of leads at a plurality of points in time;
- a processor coupled to each of the plurality of leads, said processor to determine a plurality of convex hulls for a plurality of pairs of signals from the plurality of leads, and to determine whether a perturbation has occurred in one or more of the plurality of convex hulls.
A computer readable media having disposed thereon instructions causing a processor:
- determine a first convex hull for a first plurality of points, each point of the first plurality of points having a first coordinate being a value of a first monitored signal at a specific moment in time, and having a second coordinate being a value of a second monitored signal at the specific point in time;
- determine a second convex hull for a second plurality of points, each point of the second plurality of points having a first coordinate being a value of a third monitored signal at a specific moment in time, and having a second coordinate being a value of a fourth monitored signal at the specific point in time;
- monitor the first and second convex hulls to determine whether a perturbation has occurred in either of the first and second convex hulls;
- determine, upon detecting a perturbation in one of the first and second convex hulls, whether a perturbation has occurred in the other of the first and second convex hulls;
- and
- alert an operator that a clinically significant change may have occurred in the patient if both the first and second convex hulls have been perturbed.
A computer readable media having encoded thereon a plurality of instructions for programming a processor to monitor a patient, said plurality of instructions comprising:
- determining a plurality of convex hulls for a plurality of pairs of signals from the patient;
- and
- indicating a potentially clinically significant change based on a determination that a perturbation has occurred in a predetermined portion of the plurality of convex hulls.
A computer readable media having encoded thereon a plurality of instructions for programming a processor to monitor a patient, said plurality of instructions comprising:
- indicating that a clinically significant change may have occurred in the patient if perturbations exist in a plurality of convex hulls of a plurality of plots of monitored signal pairs;
- and
- indicating that an artifact may exist in one or more of a plurality of monitored signals if a perturbation exists only in a subset of the plurality of convex hulls of the plurality of plots of monitored signal pairs and not in a remaining ones of the plurality of convex hulls of the plurality of plots of monitored signal pairs.
A method for monitoring a patient comprising:
- plotting a first plurality of points from a first monitored signal versus a second plurality of points from a second monitored signal;
- plotting a third plurality of points from a third monitored signal versus the first plurality of points and the second plurality of points;
- determining if there is a perturbation in each of the plots;
- and
- providing an alert that a clinically significant change may have occurred in the patient if perturbations are determined in each of the plots.
Dependencies are inferred from the claim text.