Electric operation apparatus

• US 20050101949A1
• Filed: 11/17/2003
• Published: 05/12/2005
• Est. Priority Date: 12/02/1999
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Inventors: Hijii, Kazuya, Harano, Kenji, Ohyama, Masahide
• Granted Patent: US 7,001,381 B2
• Time in Patent Office: Days
• US Class Current: 606/40
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/0072 Current
• CPC Class Codes: A61B 2018/00827 Current
• CPC Class Codes: A61B 2018/00875 Resistance or impedance

Abstract

An electric operation apparatus including: a high frequency current generating circuit for feeding a high frequency current to electrodes; a direct power supply circuit for supplying variable electric power to the high frequency current generating circuit; a therapeutic condition monitoring circuit for monitoring a therapeutic condition brought about by the high frequency current on the basis of the high frequency current outputted by the high frequency electric current generating circuit; and a supplied power setting circuit for supplying a setting signal for supplied electric power to the power supply circuit on the basis of the monitoring results obtained by the therapeutic condition monitoring circuit.

Claims

1-16. -16. (canceled)

17. An electric operation apparatus comprising:

a high frequency electric current generating circuit that generates a high frequency electric current for feeding the high frequency electric current to electrodes;

a direct current power supply circuit that supplies variable direct current electric power to the high frequency electric current generating circuit to adjust an output of the high frequency electric current generating circuit;

a detecting circuit including at least a sensor for monitoring a therapeutic condition brought about by the high frequency electric current during a treatment;

a therapeutic condition estimation circuit that estimates the therapeutic condition based on information of the therapeutic condition monitored during the treatment the therapeutic condition estimation circuit selecting a target value corresponding to the estimated therapeutic condition upon completion of the treatment among a plurality of predetermined target values; and

a supplied power setting circuit that sets the electric power supplied by the direct current power circuit, the supplied power setting circuit changing the electric power supplied to a predetermined power supply condition so as to reduce the high frequency electric current if a detected result of the detecting circuit reaches a target value set by the therapeutic condition estimation circuit.

18. The electric operation apparatus of claim 17, wherein the therapeutic condition estimation circuit selects the target value based on a maximum of the high frequency electric current value.

19. The electric operation apparatus of claim 17, wherein the target value is determined based on a maximum high frequency electric current value.

20. The electric operation apparatus of claim 17, wherein the therapeutic condition estimation circuit selects the target value based on an amount of time corresponding to variations in a sampled electric current value.

21. The electric operation apparatus of claim 17, wherein the therapeutic condition estimation circuit selects the target value based on a time needed to achieve a maximum sampled electric current value.

22. The electric operation apparatus of claim 21, wherein the supplied power setting circuit compares the current high frequency electric current value detected by the detecting circuit with a threshold value determined based on the maximum value, and modifies the setting such that the supplied power is reduced based on the comparison result.

23. The electric operation apparatus of claim 21, wherein the supplied power setting circuit determines whether the high frequency electric current value reaches a predetermined threshold value after a time period predetermined to indicate that a blood coagulation treatment has been completed, and modifies the setting such that the supplied electric power is reduced if it is confirmed that coagulation has indeed occurred.

24. The electric operation apparatus of claim 17, wherein the therapeutic condition estimation circuit selects the target value based on an amount of time corresponding to variations in a sampled impedance value of a subject being treated.

25. The electric operation apparatus of claim 17, wherein the therapeutic condition estimation circuit selects the target value based on a time needed for a sampled impedance value of a subject being treated to reach a minimum value.

26. The electric operation apparatus of claim 25, wherein the supplied power setting circuit compares the current impedance value with a target value established based on the minimum value, and modifies the setting such that the supplied power is reduced based on the comparison result.

27. The electric operation apparatus of claim 25, wherein the supplied power setting circuit determines whether the impedance value reaches a predetermined threshold value after a time period predetermined to indicate that a blood coagulation treatment has been completed, and modifies the setting such that the supplied electric power is reduced if it is confirmed that coagulation has indeed occurred.

28. An output control method for an electric operation apparatus comprising a high frequency electric current generating circuit that generates a high frequency electric current for feeding the high frequency electric current to electrodes, a direct current power supply circuit that supplies variable direct current electric power to the high frequency electric current generating circuit to adjust an output of the high frequency electric current generating circuit, and a detecting circuit that monitors a therapeutic condition brought about by the high frequency electric current during a treatment, the method comprising:

monitoring the therapeutic condition brought about by the high frequency electric current during the treatment;

estimating the therapeutic condition upon completion of the a treatment based on information of the therapeutic condition monitored during the treatment;

setting a target value based on an estimated result obtained at the estimating step; and

rendering the direct current power supply circuit a predetermined supply condition in order to reduce a supply power of the direct current power supply circuit if a detected result reaches a target value set at the setting step.