Optical Vital Sign Detection Method and Measurement Device
First Claim
1. A vital sign measurement device comprising:
- a sensor fixation device adapted to be placed against an anatomical location of a subject, within which is an artery;
an optical sensing system comprising an optical source device and an optical detector, both of which are held by the sensor fixation device and move with movement of the sensor fixation device, the optical source device configured to produce a speckle pattern output, the optical detector positioned to detect at least a portion of the speckle pattern output and generate therefrom the detected portion of the speckle pattern output, the optical sensing system sensing an arterial pulse from the movement, bending, or compression of at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in the optical signal received within the detected portion of the speckle pattern output; and
an output unit that generates a measure of the vital sign using a signal indicative of the optical signal received within the detected portion of the speckle pattern output.
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Accused Products
Abstract
A vital sign measurement device includes a sensor fixation device, an optical sensing system, and an output unit. The sensor fixation device is adapted to be placed against an anatomical location of a subject, within which is an artery. The optical sensing system includes an optical source device and an optical detector, both of which are held by the sensor fixation device and move with movement of the sensor fixation device. The optical source device is configured to produce a speckle pattern output. The optical detector is positioned to detect at least a portion of the speckle pattern output and generate therefrom the detected portion of the speckle pattern output. The optical sensing system can sense an arterial pulse from the movement, bending, or compression of at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in the optical signal received within the detected portion of the speckle pattern output. The output unit generates a measure of the vital sign using a signal indicative of the optical signal received within the detected portion of the speckle pattern output.
73 Citations
26 Claims
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1. A vital sign measurement device comprising:
a sensor fixation device adapted to be placed against an anatomical location of a subject, within which is an artery; an optical sensing system comprising an optical source device and an optical detector, both of which are held by the sensor fixation device and move with movement of the sensor fixation device, the optical source device configured to produce a speckle pattern output, the optical detector positioned to detect at least a portion of the speckle pattern output and generate therefrom the detected portion of the speckle pattern output, the optical sensing system sensing an arterial pulse from the movement, bending, or compression of at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in the optical signal received within the detected portion of the speckle pattern output; and an output unit that generates a measure of the vital sign using a signal indicative of the optical signal received within the detected portion of the speckle pattern output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of measuring a vital sign in a subject, the method comprising:
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placing a sensor fixation device against an anatomical location of a subject, within which is an artery; generating a speckle pattern output using an optical source device held by the sensor fixation device; detecting, using an optical detector held by the sensor fixation device, a portion of the speckle pattern output and generating therefrom a signal indicative of optical energy received at the detected portion of the speckle pattern output, the detected portion of the speckle pattern output changing in response to an arterial pulse; and generating a measure of the vital sign using the generated signal indicative of optical energy received at the detected portion of the speckle pattern output. - View Dependent Claims (23, 24, 25)
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26. A vital sign measurement device comprising:
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a sensor fixation device adapted to be placed against an anatomical location of a subject, within which is an artery; an optical sensing system comprising an optical source, a diffuser, and an optical detector, at least one of the optical source, the diffuser, and the optical detector held by the sensor fixation device and adapted to move in response to an arterial pulse relative to at least one of the other components of the optical sensing system, the optical source and the diffuser configured to produce a speckle pattern output, the optical detector positioned to detect a portion of the speckle pattern output and generate therefrom a signal indicative of optical energy received within the detected portion of the speckle pattern output; and an output unit that generates a measure of the vital sign using the generated signal indicative of optical energy received within the detected portion of the speckle pattern output.
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Specification