Non-invasive blood pressure determination method

  • US 8,047,998 B2
  • Filed: 04/17/2007
  • Issued: 11/01/2011
  • Est. Priority Date: 04/17/2007
  • Status: Active Grant
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First Claim
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1. A method for estimating systolic blood pressure and diastolic blood pressure comprising:

  • obtaining a pulse transit time slope from a patient;

    providing previously acquired blood pressure data obtained from a plurality of different subjects to a processor, said previously acquired blood pressure data adapted to convey the manner in which a systolic amplitude ratio and a diastolic amplitude ratio vary with respect to the pulse transit time slope obtained from the patient;

    implementing the previously acquired blood pressure data in the processor to select a systolic amplitude ratio and a diastolic amplitude ratio that most closely correlate with the pulse transit time slope obtained from the patient, wherein the selected systolic amplitude ratio and diastolic amplitude ratio are adapted to compensate for the effects of arterial compliance;

    implementing the selected systolic amplitude ratio in the processor to estimate a systolic blood pressure level; and

    implementing the selected diastolic amplitude ratio in the processor to estimate a diastolic blood pressure level.

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