ELECTROSURGICAL INSTRUMENT WITH IMPEDANCE SPECTROSCOPY AND METHOD OF MONITORING STATE OF INSTRUMENT JAWS AND TISSUE

Smart overview of the Invention

The electrosurgical instrument integrates an end effector with dual jaws capable of grasping tissue, applying therapeutic energy for sealing, and incorporating a knife for severing tissue. It features an electrode that engages tissue to emit non-therapeutic energy, allowing the controller to analyze impedance phase angle and magnitude. This analysis helps detect significant events based on the impedance measurements, enhancing the precision of surgical procedures.

Background

Electrosurgical instruments like the ENSEAL® Tissue Sealing Device are designed to cut and transmit radio frequency (RF) energy to tissue for coagulation or sealing. However, monitoring the state of an end effector during use has been a challenge. The described invention addresses this by utilizing impedance spectroscopy to provide real-time feedback on the tissue's condition and the instrument's performance.

Detailed Description

The technology described is adaptable, with various embodiments and combinations possible. It emphasizes that terms like "proximal" and "distal" are relative to the surgeon's position. The descriptions and illustrations are intended to be exemplary, not restrictive, allowing for modifications and variations within the claims' scope.

Instrument Components

The electrosurgical instrument comprises a handle assembly, shaft assembly, articulation assembly, and end effector. The end effector can grasp, cut, and seal tissue using non-therapeutic bipolar RF energy to ensure correct tissue identification before applying therapeutic energy. It is connected to a waveform generator that supplies the necessary power, and the handle assembly includes controls for operating the instrument.

Functional Elements

The handle assembly features a control unit, pistol grip, jaw closure trigger, knife trigger, activation button, and articulation control. These components allow for single-handed operation and precise control over the end effector's actions. The shaft assembly houses connectors and actuators linking the handle's controls to the end effector, enabling the opening and closing of jaws, knife actuation, and energy application.