Motion insensitive pulse detector
AssigneeVital Insite, Inc.
InventorsBryan P. Flaherty, Mark H. Sher, Richard G. Caro
Life of this patent
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Abstract
A motion insensitive pulse detector for detecting a patient's pulse includes an exciter adapted to be positioned over a blood vessel of the patient and configured to induce a transmitted exciter waveform into the patient. A noninvasive sensor is adapted to be positioned over the blood vessel and configured to sense a hemoparameter and to generate a noninvasive sensor signal representative of the hemoparameter containing a component of a received exciter waveform. A processor is coupled to the noninvasive sensor and configured to process the noninvasive sensor signal to determine the patient's pulse. Advantages of the invention include the ability to detect a patient's pulse even when the patient is moving or being moved by medical personnel.
Claims30
A motion insensitive pulse detector for determining a patient's pulse, comprising:
- an exciter adapted to be positioned over a blood vessel of the patient and configured to induce a transmitted exciter waveform into the patient;
- a noninvasive sensor adapted to be positioned over said blood vessel and configured to sense a hemoparameter and to generate a noninvasive sensor signal representative of said hemoparameter containing a plurality of components including a received exciter waveform component, a physiological waveform component, and a motion component;
- and
- a processor coupled to said noninvasive sensor and configured to receive said noninvasive sensor signal, said processor having a filter configured to separate said received exciter waveform component from said physiological waveform component and said motion component and wherein said processor is configured to determine the patient's pulse based at least in part on said received exciter waveform component.
A processor for determining a patient's pulse with an apparatus having an exciter adapted to be positioned over a blood vessel of the patient and configured to induce a transmitted exciter waveform into the patients and a noninvasive sensor adapted to be positioned over said blood vessel and configured to sense a hemoparameter and to generate a noninvasive sensor signal representative of said hemoparameter containing a plurality of components including a received exciter waveform component, a physiological waveform component, and a motion component, said processor comprising:
- an input configured to receive said noninvasive sensor signal;
- a filter configured to separate said received exciter waveform component from said physiological waveform component and said motion component;
- and
- a determination routine configured to process said noninvasive sensor signal to determine the patient's pulse based at least in part on said received exciter waveform component.
A method of determining a patient's pulse, comprising the steps of:
- inducing a transmitted exciter waveform into the patient;
- noninvasively sensing a hemoparameter and generating a noninvasive sensor signal representative of said hemoparameter containing a plurality of components including a received exciter waveform component, a physiological waveform component, and a motion component;
- and
- processing said noninvasive sensor by performing the steps including:
- separating said received exciter waveform component from said physiological waveform component and said motion component;
- and
- determining the patient's pulse based at least in part on said received exciter waveform component.
Dependencies are inferred from the claim text.