Multiphasic defibrillator utilizing controlled energy pulses
AssigneeMedical Research Laboratories, Inc.
InventorMichael C. Garrett
Life of this patent
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Abstract
An expert system-controlled defibrillator for delivering precise energy doses to a patient who's heart is in fibrillation. An energy source connects to the patient's chest (during emergency resuscitation) or directly to the heart (during open-heart surgery) and discharges energy in one or more pulses. The apparatus measures a patient-dependent parameter or parameters, and determines, from an expert based system, the waveform morphology and the precise amount of energy to deliver.
Claims43
A method of defibrillating a patient with energy, comprising
- selecting a predetermined target energy,
- applying a first pulse of energy,
- measuring voltage and current of said first pulse to determine a resistance of said patient,
- selecting a predetermined first-pulse energy and a predetermined second-pulse energy,
- truncating said first pulse after delivery of said first-pulse energy,
- applying a second pulse,
- truncating said second pulse after delivery of said second-pulse energy.
A method of defibrillating a patient with energy, comprising
- selecting a predetermined target energy,
- applying a first pulse of energy,
- measuring voltage and current of said first pulse to determine a first resistance of said patient,
- selecting a predetermined first-pulse energy,
- truncating said first pulse after delivery of said first-pulse energy,
- applying a second pulse,
- measuring voltage and current of said second pulse to determine a second resistance of said patient,
- selecting a predetermined second-pulse energy,
- truncating said second pulse after delivery of said second-pulse energy.
A method of defibrillating a patient with energy, comprising
- selecting a predetermined target energy,
- applying a first pulse of energy,
- determining at least one patient-dependent parameter,
- selecting a predetermined first-pulse energy and a predetermined second-pulse energy,
- truncating said first pulse after delivery of said first-pulse energy,
- applying a second pulse,
- truncating said second pulse after delivery of said second-pulse energy.
A method of defibrillating a patient with energy, comprising
- selecting a predetermined target energy,
- applying a first pulse of energy,
- determining at least one patient-dependent parameter during said first pulse of energy,
- selecting a predetermined first-pulse energy,
- truncating said first pulse after delivery of said first-pulse energy,
- applying a second pulse,
- determining at least one patient-dependent parameter during said second pulse of energy,
- selecting a predetermined second-pulse energy,
- truncating said second pulse after delivery of said second-pulse energy.
A method of defibrillating a patient by delivery of at least one energy pulse, comprising
- selecting a predetermined target energy
- applying said at least one energy pulse to said patient
- measuring voltage and current of said at least one energy pulse to determine a resistance of said patient,
- selecting a predetermined value of energy,
- truncating said delivery of said at least one energy pulse after delivery of said predetermined value of energy.
An apparatus for delivery of at least one energy pulse to a patient, said at least one energy pulse having characteristics, wherein said characteristics are determined by an expert system.
A method of defibrillating a patient by delivery of at least one energy pulse, comprising
- selecting a predetermined target energy
- applying said at least one energy pulse to said patient
- determining at least one patient-dependent parameter,
- selecting a predetermined value of energy,
- truncating said delivery of said at least one energy pulse after delivery of said predetermined value of energy.
Dependencies are inferred from the claim text.