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Implantable systemic blood pressure measurement systems and methods

  • US 8,147,416 B2
  • Filed: 08/31/2007
  • Issued: 04/03/2012
  • Est. Priority Date: 08/31/2007
  • Status: Active Grant
First Claim
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1. A method for monitoring a patient'"'"'s arterial blood pressure with an arterial blood pressure monitor, the method comprising:

  • (a) using implanted electrodes to obtain a first signal indicative of electrical activity of the patient'"'"'s heart;

    (b) using an implanted sensor to obtain a second signal indicative of mechanical activity of the patient'"'"'s heart;

    (c) transmitting said first and said second signal to said arterial blood pressure monitor, said arterial blood pressure monitor comprising a microcontroller;

    (d) detecting with said microcontroller a ventricular depolarization and a ventricular repolarization in a portion of the first signal corresponding to a cardiac cycle;

    (e) detecting with said microcontroller a maximum peak amplitude in a portion of the second signal corresponding to the same cardiac cycle;

    (f) determining with said microcontroller a time t1 from the detected ventricular depolarization to the detected maximum peak amplitude in the second signal;

    (g) determining with said microcontroller a time t2 from the detected ventricular repolarization to the detected maximum peak amplitude in the second signal;

    (h) determining with said microcontroller a peak pulse arrival time (PPAT) based on times t1 and t2; and

    (i) determining with said microcontroller a value indicative of systolic pressure (SP) based on the PPAT.

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