×

Fluid delivery system and controller for electrosurgical devices

  • US 7,815,634 B2
  • Filed: 12/22/2003
  • Issued: 10/19/2010
  • Est. Priority Date: 03/06/2000
  • Status: Expired due to Fees
First Claim
Patent Images

1. An electrosurgical apparatus to provide controlled delivery of radio-frequency power and a fluid to an electrosurgical hand device to treat tissue, the apparatus comprising:

  • a radio-frequency generator to deliver the radio-frequency power, the radio-frequency power from the radio-frequency generator selectable at a radio-frequency power level;

    a pump to deliver the fluid;

    a primer to prime the hand device with the fluid;

    a control system comprising an open loop control system with respect to the tissue, the open loop control system having a functional relationship relating a flow of the fluid to be delivered by the pump to the radio-frequency power level, the functional relationship to increase the flow of the fluid in response to an increase in the radio-frequency power level and to decrease the flow of the fluid in response to a decrease in the radio-frequency power level;

    a selection switch which changes the functional relationship relating the flow of the fluid to be delivered by the pump to the radio-frequency power level; and

    wherein the functional relationship relating a flow of the fluid to be delivered by the pump to the radio-frequency power level resides in a storage medium of the apparatus for use by a microprocessor, the functional relationship in the form of a mathematical equation having a proportionality constant and the selection switch changes the functional relationship by changing the proportionality constant.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×