U.S. patents available from 1976 to present.
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Method and apparatus for delivering electrotherapy having an equivalent probability of success for different patients

Patent 6650936 Issued on November 18, 2003. Estimated Expiration Date: Icon_subject April 23, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3782389

3842841

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Issued on: 12/14/1982
Inventor: Kusserow

Apparatus for measuring impedance
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Microprocessor controlled electronic stimulating device having biphasic pulse output
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Inventor: Bartelt, et al.

Constant charge pacemaker
Patent #: 5423866
Issued on: 06/13/1995
Inventor: Ekwall

Method and apparatus for phase related cardiac defibrillation
Patent #: 5447518
Issued on: 09/05/1995
Inventor: Pless

Cardiac cardioverter/defibrillator with in vivo impedance estimation
Patent #: 5540724
Issued on: 07/30/1996
Inventor: Cox

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Inventors

Application

No. 09/841183 filed on 04/23/2001

US Classes:

607/6, Sensing body condition or signal other than electrocardiographic signal607/7, Controlling or indicating stimulation level607/8Computing energy required or contact impedance

Examiners

Primary: Jastrzab, Jeffrey R.

Attorney, Agent or Firm

International Class

A61N 1/39 (20060101)

Abstract

A medical device constructed according to the invention includes electrodes (12a, 12b), a measuring unit (24) for measuring a patient-dependent electrical parameter (e.g., impedance) of the patient, an electrotherapy generator (26) for delivering electrotherapy to the patient, and a processing unit (20) for controlling the delivery of electrotherapy to the patient. Electrotherapy is preferably delivered to the patient based on the measured patient-dependent electrical parameter and a predetermined response of a reference patient to a nominal electrotherapy. The actual electrotherapy delivered to the patient is controlled so that the electrotherapy has a probability of success for the patient that is equivalent to the probability of success of the nominal electrotherapy for the reference patient. A consistent shock efficacy across different patients is achieved.

Other References

  • Dalzell, G.W.N., et al., "Initial Experience With a Microprocessor Controlled Current Based Defibrillator," Br. Heart J. 61:502-5, 1989
  • Kerber, Richard E., et al., "Current-Based Transthoracic Defibrillation," Am. J. Cardiol. 78:1113-1118, 1996
  • Kroll, Mark W., "A Minimal Model of the Single Capacitor Biphasic Defibrillation Waveform," PACE 17(Pt. I):1782-1792, 1994
  • Lerman, Bruce B., et al., "Current-Based Versus Energy-Based Ventricular Defibrillation: A Prospective Study," J. Am. Coll. Cardiol. 12(5):1259-64, 1988
  • Walcott, Gregory P., et al., "Choosing the Optimal Monophasic and Biphasic Waveforms for Ventricular Defibrillation," J. Cardiovasc. Electrophysiol. 6(9):737-750, 1995
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