Optical Central Venous Pressure Measurement
First Claim
1. A method for outputting a central venous pressure (CVP) of a person computed by at least one computing device, the method comprising:
- generating, by the at least one computing device and using a camera associated with the at least one computing device, a video of the person raising their hands;
generating, by the at least one computing device, a reconstructed video in which motion that results from at least one of veins collapsing in the person'"'"'s arms or a change in pulse is amplified based on detection of the collapsing of veins in the person'"'"'s arms or the change in the person'"'"'s pulse at different spatial frequency bands by processing the video according to one or more video motion amplification techniques;
measuring, by the at least one computing device, an angle and height of the raised hands, relative to the person'"'"'s heart, in the reconstructed video at a time that corresponds to the collapsing of the veins or the change in pulse;
computing, by the at least one computing device, the CVP of the person based on the measured angle and height of the raised hands; and
outputting, by the at least one computing device, digital content indicative of the computed CVP.
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Accused Products
Abstract
This document describes optical central venous pressure measurement. To determine the central venous pressure (CVP) of a person optically, video of a right side of the person'"'"'s neck is captured. By way of example, a medical professional records a video of the right side of the person'"'"'s neck using a smartphone. The right side of the person'"'"'s neck is captured because it is where the person'"'"'s external and internal jugular veins are located and pulsatile motions that are usable to measure CVP occur in those veins. The video is then processed according to video motion amplification techniques to generate a reconstructed video of the right side of the person'"'"'s neck. In the reconstructed video, the pulsatile motion of the person'"'"'s venous system that occurs at the right side of their neck is visually amplified. Using the reconstructed video, measurements are made of a distance between a peak of the visually-amplified pulsatile motion and an anatomical feature of the person. The measured distance between the peak of the visually-amplified pulsatile motion and the anatomical feature is used to determine CVP of the person. These techniques enable CVP to be determined without relying on estimates made by medical professionals.
51 Citations
26 Claims
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1. A method for outputting a central venous pressure (CVP) of a person computed by at least one computing device, the method comprising:
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generating, by the at least one computing device and using a camera associated with the at least one computing device, a video of the person raising their hands; generating, by the at least one computing device, a reconstructed video in which motion that results from at least one of veins collapsing in the person'"'"'s arms or a change in pulse is amplified based on detection of the collapsing of veins in the person'"'"'s arms or the change in the person'"'"'s pulse at different spatial frequency bands by processing the video according to one or more video motion amplification techniques; measuring, by the at least one computing device, an angle and height of the raised hands, relative to the person'"'"'s heart, in the reconstructed video at a time that corresponds to the collapsing of the veins or the change in pulse; computing, by the at least one computing device, the CVP of the person based on the measured angle and height of the raised hands; and outputting, by the at least one computing device, digital content indicative of the computed CVP. - View Dependent Claims (2, 3, 4, 7, 21, 22, 23, 24)
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5. (canceled)
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6. (canceled)
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8. (canceled)
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9. (canceled)
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10. A device comprising:
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a video camera to capture video of a person raising their hands; a display device to display a reconstructed video of the person raising their hands; and a processing system to implement a central venous pressure (CVP) measurement manager configured to; generate the reconstructed video in which motion that results from at least one of veins collapsing in the person'"'"'s arms or a change in pulse is amplified based on detection of the collapsing of veins in the person'"'"'s arms or the change in the person'"'"'s pulse at different spatial frequency bands by processing the video according to one or more video motion amplification techniques; measure an angle and height of the raised hands, relative to the person'"'"'s heart, in the reconstructed video at a time that corresponds to the collapsing of veins or the change in pulse; compute CVP measurements for the person based on the measured angle and height of the raised hands; and present digital content indicative of the CVP measurements. - View Dependent Claims (11, 13, 14, 15, 16, 25, 26)
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12. (canceled)
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17. (canceled)
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18. A computer-implemented method comprising:
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generating video of a person raising their hands two or more times; determining a first central venous pressure (CVP) of the person at a first time that corresponds to a first raising of the person'"'"'s hands based, in part, on measuring an angle and height of the person'"'"'s raised hands, relative to the person'"'"'s heart, that corresponds to at least one of a collapsing of the person'"'"'s veins or a change in the person'"'"'s pulse, the angle and height measured in a frame of a first reconstructed video associated with the first time and in which the motion that results from the at least one of the collapsing of veins in the person'"'"'s arms or the change in pulse is amplified based on detection of the collapsing of veins in the person'"'"'s arms or the change in the person'"'"'s pulse at different spatial frequency bands by processing the video according to one or more video motion amplification techniques; determining a second CVP of the person at a second time that corresponds to a second raising of the person'"'"'s hands based, in part, on measuring an angle and height of the person'"'"'s raised hands, relative to the person'"'"'s heart, that corresponds to at least one of a second collapsing of the person'"'"'s veins or a second change in the person'"'"'s pulse, the angle and height measured in a frame of a second reconstructed video associated with the second time and in which the motion that results from the at least one of the collapsing of veins in the person'"'"'s arms or the change in pulse is amplified based on detection of the collapsing of veins in the person'"'"'s arms or the change in the person'"'"'s pulse at different spatial frequency bands by processing the video according to the one or more video motion amplification techniques; and determining a trend in the cardiovascular health of the person based on a comparison of the first CVP determined at the first time and the second CVP determined at the second time. - View Dependent Claims (19, 20)
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Specification