System and method for determining a vital sign of a subject
First Claim
Patent Images
1. A system for determining a vital sign of a subject comprising:
- a sensor configured to be attached to a subject and generate a vital sign information signal indicative of a vital sign of the subject,a vital sign processor configured to process a vital sign from the vital sign information signal,an image analysis processor configured to detect motion of a marker attached to said sensor from image data obtained by a camera, andan alarm processor configured to generate and output an alarm signal in response to;
the vital sign fulfilling a first condition and,the detected motion of said marker fulfilling a second condition.
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Abstract
A system for determining a vital sign of a subject releases the likelihood of generating and outputting false alarms. The system includes a vital sign processor that processes the vital sign information signal measured by a sensor attached to a subject to obtain a vital sign of said subject. An image analysis unit detects motion of a marker attached to the sensor from image data obtained by an imaging unit from at least an imaging region containing the sensor. An alarm unit generates and outputs an alarm signal based (1) on the measured vital sign information signal and/or the obtained vital sign and (2) the detected motion of said marker.
32 Citations
20 Claims
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1. A system for determining a vital sign of a subject comprising:
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a sensor configured to be attached to a subject and generate a vital sign information signal indicative of a vital sign of the subject, a vital sign processor configured to process a vital sign from the vital sign information signal, an image analysis processor configured to detect motion of a marker attached to said sensor from image data obtained by a camera, and an alarm processor configured to generate and output an alarm signal in response to; the vital sign fulfilling a first condition and, the detected motion of said marker fulfilling a second condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining a vital sign of a subject comprising:
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a plethysmographic sensor attachable to the subject and comprising a light source that emits light in a first direction onto skin covered by said sensor, and in a second direction away from the skin, an imaging unit configured to detect the light from the light source emitted in the second direction away from the skin, a vital sign processor configured to process a vital sign information signal measured by the plethysmographic sensor to obtain a vital sign of said subject, an image analysis unit configured to detect motion of said plethysmographic sensor from image data obtained by the imaging unit, and an alarm unit configured to generate and output an alarm signal based on the measured vital sign information signal and/or the vital sign processed from the measured vital sign information signal and on the detected motion of said plethysmographic sensor. - View Dependent Claims (11, 12, 13)
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14. A plethysmographic sensor comprising:
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one light source configured to emit light; a sensor housing designed such that the light emitted from the one light source is emitted out of the housing in a first direction and in a second direction away from the first direction, light emitted in the second direction being transmitted to a motion detector displaced from the plethysmographic sensor; a light detector configured to receive the light emitted in the first direction after intersection with a patient, the light detector being mounted to the housing.
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15. A system for determining a vital sign of a subject comprising:
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a plethysmographic sensor configured to generate a vital sign information signal, the sensor comprising a light source configured to emit light in a first direction toward a subject and a light detector configured to receives the light transmitted in the first direction after interaction with the subject and generate the vital sign information signal, wherein said plethysmographic sensor is designed such that light from the light source is also emitted in a second direction away from the subject, an imager configured to detect the light emitted in the second direction and generate image data, at least one processor configured to; process said vital sign information signal from said plethysmographic sensor to obtain a vital sign, determine motion of said plethysmographic sensor from the image data generated by the imager, and generate and output an alarm signal based on a combination of (1) the measured vital sign information signal and/or the obtained vital sign and (2) the determined motion of said plethysmographic sensor. - View Dependent Claims (16, 17)
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18. A system for determining a vital sign of a subject, the system comprising:
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a plethysmographic sensor configured to be worn by the subject, the plethysmographic sensor including; a light source configured to emit light in at least a first direction and a second direction, the second direction being different from the first direction, a light detector configured to receive the light emitted in the first direction and generate a detector signal indicative of the received light; an imager configured to detect the light emitted by the light source in the second direction and generate image data; at least one processor configured to; determine physiological information from the detector signal; determine motion of the plethysmographic sensor from the image data; generate and output an alarm based on a combination of the physiological information and the plethysmographic motion. - View Dependent Claims (19, 20)
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Specification