Sequential stacked capacitor defibrillator and waveform generated therefrom

Patent metadata

Field	Value
Publication number	US-8965501-B2
Application number	US-201313962934-A
Country	US
Kind code	B2
Filing date	Aug 8, 2013
Priority date	Aug 10, 2012
Publication date	Feb 24, 2015
Grant date	Feb 24, 2015

Abstract

A medical device such as an external defibrillator delivers electrical therapy using a special ascending, biphasic waveform. The special waveform is characterized by a set of at least two peaks. The amplitude of the second peak is greater than the amplitude of the first peak. The waveform is generated by switching capacitance configuration in the defibrillator from a parallel configuration to a series configuration while the defibrillator is delivering the defibrillation shock to the patient. Because of the switching capacitances and/or the waveform, the external defibrillator can be made physically smaller and weigh less, without sacrificing the therapeutic effect of a larger external defibrillator that would deliver a defibrillation shock of higher energy. As such, the defibrillator is easier to configure for transporting, handling, and even wearing.

First claim

What is claimed is:

1. An external medical device that facilitates delivery of electrical energy to a patient, the external medical device comprising:
a discharge circuit configured to deliver energy to a patient via electrodes on the patient's skin; and
an energy storage module, coupled to the discharge circuit, the energy storage module having two or more energy storage capacitors;
a defibrillation control unit configured to:
cause the two or more energy storage capacitors…

Assignees

• Physio Control Inc

Inventors

• Sullivan Joseph L

Classifications

• A61N1/39044

  Human Necessities · mapped topic

• A61N1/3912

  Human Necessities · mapped topic

• A61N1/3925 Primary

  Human Necessities · mapped topic

• A61N1/3904

  Human Necessities · mapped topic

• A61N1/39

  Human Necessities · mapped topic