Systems and methods for signal monitoring using Lissajous figures
AssigneeNellcor Puritan Bennett Ireland
InventorsJames N. Watson, Paul Stanley Addison
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Abstract
Methods and systems are provided for generating Lissajous figures based on monitored signals and identifying features of Lissajous figures. Features may include similarity metrics, shape change metrics and noise metrics, and may be used to determine information about the monitored signal. Features may also be used in monitoring operations, such as measurement quality assessment and recalibration.
Claims22
A method for processing physiological monitoring signals, comprising:
- monitoring a subject by:
- receiving a first electronic signal from a first sensor located at a first body site of a subject;
- and
- receiving a second electronic signal from a second sensor located at a second body site of a subject, wherein the second body site is different from the first body site;
- using processor equipment for:
- calculating a Lissajous figure based at least in part on the first and second electronic signals;
- identifying at least one feature of the Lissajous figure;
- and
- determining information regarding the monitoring of the subject based at least in part on the at least one feature;
- and
- outputting at least a portion of the information to an output device.
A system for processing physiological monitoring signals, comprising:
- a signal input, capable of receiving a first electronic signal from a first sensor located at a first body site of a subject, and capable of receiving a second electronic signal from a second sensor located at a second body site of the subject, wherein the second body site is different from the first body site;
- a signal output, capable of outputting an electronic signal representative of information regarding the monitoring of the subject;
- and
- a processor, communicably coupled to the signal input and the signal output, the processor being capable of:
- monitoring the subject based at least in part on the first and second electronic signals;
- calculating a Lissajous figure based at least in part on the first and second electronic signals;
- identifying at least one feature of the Lissajous figure;
- determining information regarding the monitoring of the subject based at least in part on the at least one feature;
- and
- outputting at least a portion of the information to the output device.
Non-transitory computer-readable medium for use in processing physiological monitoring signals, the non-transitory computer-readable medium having computer program instructions recorded thereon for:
- monitoring a subject by:
- receiving a first electronic signal from a first sensor located at a first body site of a subject;
- and
- receiving a second electronic signal from a second sensor located at a second body site of a subject, wherein the second body site is different from the first body site;
- calculating a Lissajous figure based at least in part on the first and second electronic signals;
- identifying at least one feature of the Lissajous figure;
- and
- determining information regarding the monitoring of the subject based at least in part on the at least one feature.
Dependencies are inferred from the claim text.