Apparatus and process for antifact rejection through cross correlation in sphygmometry
First Claim
1. An apparatus for producing information indicative of the physical condition of a living test subject comprising:
- means for applying a selectively changeable pressure to the test subject adjacent a blood vessel and means for measuring a fluctuating quantity proportional to a sum, said sum comprising a time dependent fluctuating component representative of the pulsatile pressure within the blood vessel, plus the selectively changeable pressure applied externally adjacent the blood vessel;
first means responsive to said quantity in a first analytical manner for providing at least one primary signal tentatively representative of the changeable pressure applied to the living test subject;
second means responsive to said quantity in a second analytical manner different from said first analytical manner for defining at least one respective zone-of-acceptance expressed in terms of a corresponding representation of said changeable applied pressure; and
means for comparing a said primary signal with a respective said zone of acceptance and producing an output of said primary signal as being representative of the physical condition of the living test subject only if said primary signal is within said respective zone-of-acceptance.
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Accused Products
Abstract
In a system for measuring blood pressure and the like based on a sensed quantity representing the sum of pressure applied by a pressure cuff and a fluctuating component representative of the pulsatile pressure within the blood vessel method and apparatus for indicating blood pressure only if that pressure determined in a first preferred manner correlates substantially with a pressure determined in a secondary, different manner. More specifically, the sensed quantity is analyzed in a manner preferred for determining diastolic pressure and a manner preferred for determining systolic pressure, and the diastolic and systolic pressures or pressure ranges established by analyzing the sensed quantity in a secondary manner or manners. Examples of preferred and secondary techniques for diastolic and systolic pressure determinations are discussed.
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Citations
22 Claims
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1. An apparatus for producing information indicative of the physical condition of a living test subject comprising:
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means for applying a selectively changeable pressure to the test subject adjacent a blood vessel and means for measuring a fluctuating quantity proportional to a sum, said sum comprising a time dependent fluctuating component representative of the pulsatile pressure within the blood vessel, plus the selectively changeable pressure applied externally adjacent the blood vessel; first means responsive to said quantity in a first analytical manner for providing at least one primary signal tentatively representative of the changeable pressure applied to the living test subject; second means responsive to said quantity in a second analytical manner different from said first analytical manner for defining at least one respective zone-of-acceptance expressed in terms of a corresponding representation of said changeable applied pressure; and means for comparing a said primary signal with a respective said zone of acceptance and producing an output of said primary signal as being representative of the physical condition of the living test subject only if said primary signal is within said respective zone-of-acceptance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In apparatus for producing information indicative of the physical condition of a living test subject said apparatus including means for applying a selectively changeable pressure to the test subject adjacent a blood vessel and means for measuring a fluctuating quantity proportional to a sum, said sum comprising a time dependent fluctuating component representative of the pulsatile pressure within the blood vessel, plus the selectively changeable pressure applied externally adjacent the blood vessel, the improvement comprising
first means responsive to said quantity in a first analytical manner for providing at least one primary signal tentatively representative of the changeable pressure applied to the living test subject; -
second means responsive to said quantity in a second analytical manner different from said first analytical manner for defining at least one respective zone-of-acceptance expressed in terms of a corresponding representation of said changeable applied pressure; and means for comparing a said primary signal with a respective said zone-of-acceptance and producing an output of said primary signal as being representative of the physical condition of the living test subject only if said primary signal is within said respective zone-of-acceptance.
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12. A process for producing information indicative of the physical condition of a living test subject comprising applying a selectively changeable pressure to the test subject externally adjacent a blood vessel and measuring a quantity proportional to a sum, said sum comprising a time dependent fluctuating component representative of the pulsatile pressure within the blood vessel, plus the changeable pressure applied externally adjacent the blood vessel;
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analyzing said quantity in a first manner to provide at least one primary signal tentatively representative of changeable pressure applied to a living test subject; analyzing said quantity in a second manner different from said first analytical manner to define at least one respective zone-of-acceptance expressed in terms of a corresponding representation of said changeable applied pressure; and comparing a said primary signal with a respective said zone-of-acceptance and providing an output of said primary signal as being representative of the physical condition of a living test subject only if said primary signal is within said respective zone-of-acceptance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. In a process for producing information indicative of the physical condition of a living test subject including applying a selectively changeable pressure to the test subject externally adjacent a blood vessel and measuring a quantity proportional to a sum, said sum comprising a time dependent fluctuating component representative of the pulsatile pressure within the blood vessel, plus the changeable pressure applied externally adjacent the blood vessel, the improvement comprising:
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analyzing said quantity in a first manner to provide at least one primary signal tentatively representative of a changeable pressure applied to a living test subject; analyzing said quantity in a second manner different from said first analytical manner to define at least one respective zone-of-acceptance expressed in terms of a corresponding representation of said changeable applied pressure; and comparing a said primary signal with a respective said zone-of-acceptance and providing an output of said primary signal as being representative of the physical condition of a living test subject only if said primary signal is within said respective zone-of-acceptance.
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Specification