System and method for reducing pain associated with...

Details System and method for reducing pain associated with... System and method for reducing pain associated with...

2006-12-26

2006-12-26

Pezzuto, Robert E. (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S005000, C607S007000

Reexamination Certificate

active

07155286

ABSTRACT:
Techniques are provided for generating pre-pulse pain inhibition (PPI) pulses and subsequent main cardioversion shocks. The PPI pulses are relatively low-voltage pulses each having a chevron-shaped waveform. The main shocks are relatively high-voltage shocks each having a plateau-shaped waveform. By employing plateau-shaped waveforms for the main shocks, a greater cardiac membrane response can be achieved at an equivalent peak voltage as compared to conventional shock waveforms. Peak voltage is a significant contributor to pain caused by cardioversion shocks. Hence, by using the plateau-shaped waveform, pain reduction can be achieved without loss of shock effectiveness. Moreover, by employing chevron-shaped PPI pulses in combination with plateau-shaped main shocks, a relatively simple shocking circuit having a single high-voltage shocking capacitor may be used, thus eliminating the need for both low-voltage PPI capacitors and higher voltage main shock capacitors. The shocking circuit includes a low-pass resistive-capacitive filter.

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