WEIGHING SCALE WITH EXTENDED FUNCTIONS
First Claim
1. A method to determine a blood arterial pressure of an individual user (U) in a system comprising a smartphone, a cuff pressure monitor device and a personal electronic scale having a top surface with conductive pads, the method comprising the steps of:
- S1—
measure a first mean arterial pressure (MAP1) of the individual user (U) with the help of the cuff pressure monitor device, at a first instant (GT1),S2—
determine a first arterial pulse wave velocity value (PWV1) of the individual user (U) standing on the personal electronic scale, at a second instant (GT2), temporally close to the first instant (GT1),/a/—
acquiring weight variations, and extracting therefrom a ballistocardiogram (21) of the user'"'"'s heart beat,/b/—
acquiring impedance plethysmography signals across one of the foot of the user, and extracting therefrom a blood pulse signal at the foot,/c/—
calculating a time delay (DT) between the heart beat and the blood pulse signal arriving at the foot,/d1/ deducing therefrom a value of the arterial pulse wave velocity of the user,S3—
determine a second arterial pulse wave velocity value (PWV2) in a similar manner as for step S2, at a third instant (GT3),S4—
determine a second mean arterial pressure (MAP2) of the individual user (U) from the first mean blood pressure MAP1 and a function Fcorr of PWV1 and PWV2, namely MAP2=MAP1+Fcorr (PWV1, PWV2).
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Accused Products
Abstract
Methods of determination of the blood pressure, determination of a heart stroke volume, determination of the state of stress or relaxation of a user, with use of a ballistocardiogram signal reflecting the user'"'"'s heart beats, with a measure of characteristic amplitude of ballistocardiogram signal, and measure for each couple of consecutive heart beats, beat time intervals DeltaHB(i) between successive heart beats, extracted from a ballistocardiogram signal or from an impedance plethysmography signal measured at the user'"'"'s foot, leading to determination of a heart rate variability index, over at least six successive heart beats, leading to determination of mean arterial pressure, leading to determination of state of relaxation or stress of the user.
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Citations
14 Claims
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1. A method to determine a blood arterial pressure of an individual user (U) in a system comprising a smartphone, a cuff pressure monitor device and a personal electronic scale having a top surface with conductive pads, the method comprising the steps of:
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S1—
measure a first mean arterial pressure (MAP1) of the individual user (U) with the help of the cuff pressure monitor device, at a first instant (GT1),S2—
determine a first arterial pulse wave velocity value (PWV1) of the individual user (U) standing on the personal electronic scale, at a second instant (GT2), temporally close to the first instant (GT1),/a/—
acquiring weight variations, and extracting therefrom a ballistocardiogram (21) of the user'"'"'s heart beat,/b/—
acquiring impedance plethysmography signals across one of the foot of the user, and extracting therefrom a blood pulse signal at the foot,/c/—
calculating a time delay (DT) between the heart beat and the blood pulse signal arriving at the foot,/d1/ deducing therefrom a value of the arterial pulse wave velocity of the user, S3—
determine a second arterial pulse wave velocity value (PWV2) in a similar manner as for step S2, at a third instant (GT3),S4—
determine a second mean arterial pressure (MAP2) of the individual user (U) from the first mean blood pressure MAP1 and a function Fcorr of PWV1 and PWV2, namely MAP2=MAP1+Fcorr (PWV1, PWV2). - View Dependent Claims (2, 7)
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3. A method to assess a stroke volume of the heart systolic contraction of an individual user (U) standing on a personal electronic scale, the method comprising:
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/a/—
acquire weight variations, and extracting therefrom a ballistocardiogram signal reflecting the user'"'"'s heart beats,identify, in the ballistocardiogram signal, for at least one heart beat HB(i) exhibiting a pulse-like wave signal PW(i), having a first and a second significant negative apexes I,K and a first and a second significant positive apexes H,J, identify, one or more characteristic value WCV from at least two of the first and second positive and negative apexes, H,I,J,K, assess a user'"'"'s stroke volume SV, as a mathematical function of the one or more characteristic value WCV. - View Dependent Claims (4, 5, 6)
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8. A method to assess a state of stress and/or relaxation of an individual user (U) standing on a personal electronic scale, the method comprising:
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/a/—
acquire weight variations, and extracting therefrom a ballistocardiogram signal reflecting the user'"'"'s heart beats,/PA1/—
identify, in the ballistocardiogram signal, for each of a plurality of consecutive heart beats HB(i), a pulse wave PW(i),/PA2/—
measure, for each pulse wave PW(i), at least one characteristic amplitude WA(i) of the pulse wave PW(i),measure, for each couple of consecutive heart beats, beat time intervals DeltaHB(i) between successive heart beats, from the ballistocardiogram signal or from an impedance plethysmography signal measured at the user'"'"'s foot, /PR1/—
determine a user expiration phase whenever characteristic amplitude WA(i) decreases and/or beat time intervals DeltaHB(i) increases,/PR2/—
determine a user inspiration phase whenever characteristic amplitude WA(i) increases and/or beat time intervals DeltaHB(i) decreases,assess a state of stress and/or relaxation of the user, as a function of synchronization index between the inspiration/expiration phases and the user heart beats. - View Dependent Claims (9, 10)
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11. A method to assess a state of fatigue of an individual user (U) standing on a personal electronic scale, the method comprising:
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measure, for each couple of consecutive heart beats, beat time intervals DeltaHB(i) between successive heart beats, extracted from a ballistocardiogram signal or from an impedance plethysmography signal measured at the user'"'"'s foot, determine a heart rate variability index HRVI, over at least six successive heart beats. - View Dependent Claims (12, 13, 14)
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Specification