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 a signal indicative of the detected portion of the speckle pattern output;
a sensor pad held by the sensor fixation device on a cantilevered beam so that it is placed against the anatomical location when the sensor fixation device is placed against the anatomical location, wherein the sensor pad on the cantilevered beam is attached to or presses against at least one portion of the optical sensing system such that an arterial pulse results in the movement, bending, or compression of the at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in an optical energy received within the detected portion of the speckle pattern output, wherein the optical detector comprises an optical energy receiving portion having a smaller surface area than the area of the speckle pattern output; and
an output unit that generates a measure of the vital sign using the signal indicative of the optical signal received within the detected portion of the speckle pattern output.
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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.
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Citations
21 Claims
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1. 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 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 a signal indicative of the detected portion of the speckle pattern output; a sensor pad held by the sensor fixation device on a cantilevered beam so that it is placed against the anatomical location when the sensor fixation device is placed against the anatomical location, wherein the sensor pad on the cantilevered beam is attached to or presses against at least one portion of the optical sensing system such that an arterial pulse results in the movement, bending, or compression of the at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in an optical energy received within the detected portion of the speckle pattern output, wherein the optical detector comprises an optical energy receiving portion having a smaller surface area than the area of the speckle pattern output; and an output unit that generates a measure of the vital sign using the 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)
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21. 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, wherein at least a portion of the optical sensing system is positioned on a cantilevered support; 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