Electrosurgical treatment system

Patent metadata

Field	Value
Publication number	US-2016367308-A1
Application number	US-201615256072-A
Country	US
Kind code	A1
Filing date	Sep 2, 2016
Priority date	Aug 26, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

An electrosurgical treatment system includes an output section that supplies a high-frequency output to a treatment instrument, a detecting section that detects a voltage and an electric current of the high-frequency output in the output section, a phase-difference detecting section that calculates a phase difference between the detected voltage and electric current, and a control section that switches, on the basis of a change in the phase difference, a first phase for drying a biological tissue by applying the high-frequency output to the biological tissue while increasing the voltage to a second phase for coapting the biological tissue by performing, with a set value of a voltage determined according to a voltage value of the high-frequency output at an end point in time of the first phase, constant voltage control.

First claim

What is claimed is:

1 . An electrosurgical treatment system comprising:
a high-frequency-power generating section that generates a high-frequency output for treating a biological tissue; an output section that supplies the high-frequency output to the treatment instrument that applies the high-frequency output to the biological tissue; a detecting section that detects a voltage and an electric current of the high-frequency output in the output section; a phase-difference detecting section that calculates a phase difference between the voltage and the electric current detected by the detecting section; and a control section that controls the high-frequency-power generating section and switches, on the basis of a change in the phase difference, a first phase for drying the biological tissue by applying the high-frequency output in the output section to the biological tissue while increasing the voltage with respect to a start time to a second phase for coapting the biological tissue by performing, with a set value of a voltage determined according to a voltage value at an end point in time of the first phase, constant voltage control of the high-frequency output applied to the biological tissue.

2 . The electrosurgical treatment system according to claim 1 , wherein the control section switches the first phase to the second phase on the basis of an absolute value of the phase difference starting to increase.

3 . The electrosurgical treatment system according to claim 1 , wherein the control section switches the first phase to the second phase on the basis of an absolute value of the phase difference reaching a predetermined threshold.

4 . The electrosurgical treatment system according to claim 1 , wherein the control section switches the first phase to the second phase on the basis of an absolute value of the phase difference indicating a minimum value and thereafter increasing.

5 . The electrosurgical treatment system according to claim 2 , wherein, after shifting from the first phase to the second phase, the control section switches the second phase to the first phase on the basis of the absolute value of the phase difference decreasing.

6 . The electrosurgical treatment system according to claim 1 , wherein the phase detecting section and the control section are realized by common hardware.

7 . The electrosurgical treatment system according to claim 1 , wherein, in the first phase, the control section intermittently or continuously increases the voltage of the high-frequency output.

8 . The electrosurgical treatment system according to claim 1 , wherein, in the first phase, the control section changes a rate of increase of the voltage of the high-frequency output according to a rate of change of the phase difference.

9 . The electrosurgical treatment system according to claim 1 , wherein, in the second phase, the control section performs the constant voltage control in which a voltage value of the high-frequency output at an end point in time of the first phase is maintained.

10 . The electrosurgical treatment system according to claim 1 , wherein, in the second phase, the control section performs the constant voltage control in which a voltage value obtained by reducing or increasing a voltage value of the high-frequency output at an end point in time of the first phase is maintained,

11 . The electrosurgical treatment system according to claim 5 , wherein the control section is capable of switching the first phase and the second phase a plurality of times on the basis of the change in a phase difference.

12 . The electrosurgical treatment system according to claim 1 , wherein the control section changes a set value of a voltage of the constant voltage control on the basis of a change in the phase difference in the second phase.

13 . The electrosurgical treatment system according to claim 1 , wherein, when a rate of change of the phase difference in the second phase is larger than a predetermined threshold, the control section reduces a set value of a voltage of the constant voltage control stepwise or continuously.

14 . The electrosurgical treatment system according to claim 1 , wherein the control section reduces a set value of a voltage of the constant voltage control every time the phase difference changes by a specified value in the second phase.

15 . The electrosurgical treatment system according to claim 1 , wherein the control section performs the constant voltage control with a voltage value reduced by a voltage value corresponding to a period length of the first phase from a voltage at an end point in time of the first phase.

Assignees

• Olympus Corp

Inventors

• Takami Sadayoshi
• Hayashida Tsuyoshi

Classifications

• A61B2018/00589

  Coagulation · CPC title

• A61B18/1206 Primary

  Generators therefor · CPC title

• A61B2018/00767

  Voltage · CPC title

• A61B2018/00869

  Phase · CPC title

• A61B2018/00875

  Resistance or impedance · CPC title