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Electrosurgical instrument

A technology for electrosurgical instruments and cables, applied in microwave surgical instruments, parts of surgical instruments, medical science, etc., can solve the problems of friction heating field energy and dissipation, etc.

Pending Publication Date: 2021-04-13
CREO MEDICAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At microwave frequencies, fast molecular oscillations lead to frictional heating and the consequent dissipation of field energy in the form of heat

Method used

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  • Electrosurgical instrument
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Examples

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Embodiment Construction

[0054] figure 1is a schematic diagram of a complete electrosurgical system 100 capable of supplying microwave energy to the distal end of an invasive electrosurgical instrument. The system 100 includes a generator 102 for controllably supplying microwave energy. A suitable generator for this purpose is described in WO 2012 / 076844, which is hereby incorporated by reference. The generator may be arranged to monitor reflected signals received back from the instrument in order to determine an appropriate power level for delivery. For example, the generator may be arranged to calculate the impedance observed at the distal end of the instrument in order to determine the optimum delivered power level. The generator may be arranged to deliver power in a series of pulses modulated to match the breathing cycle of the patient. This will allow power delivery to occur when the lungs are deflated.

[0055] The generator 102 is connected to an interface junction 106 by an interface cable...

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Abstract

An electrosurgical instrument for delivering microwave energy to biological tissue, in which a pair of conductive tuning elements are mounted in a radiating instrument tip to shape a microwave radiation profile of the instrument so that the radiation profile is constrained around the instrument tip. Such tuning elements may result in a radiation profile that is substantially spherical around the instrument tip, providing a well-defined ablation volume. The tuning elements act to improve the efficiency with which microwave energy can be delivered into target tissue.

Description

technical field [0001] The present invention relates to an electrosurgical instrument for delivering microwave energy to biological tissue for ablation of the tissue. The instrument may comprise a stylet that may be inserted through a channel of an endoscope or catheter, or may be used in laparoscopic or open surgery. The device may be used for pulmonary or gastrointestinal applications, but is not limited thereto. Background technique [0002] Electromagnetic (EM) energy and microwave energy in particular have found use in electrosurgery due to their ability to ablate biological tissue. Generally, an apparatus for delivering EM energy to body tissue includes a generator containing a source of EM energy and an electrosurgical instrument connected to the generator for delivering energy to the tissue. [0003] Conventional electrosurgical instruments are often designed to be inserted percutaneously into a patient's body. However, it may be difficult to position the device p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/18
CPCA61B18/1815A61B2018/1861A61B2018/1892A61B2018/1853A61B2018/1869A61N5/045A61B2018/1823A61B2018/00083A61B2018/00577A61B2018/00982A61B18/18
Inventor C·P·汉考克帕特里克·伯恩P·沙阿
Owner CREO MEDICAL LTD
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