Ultrasonic treatment apparatus

Patent metadata

Field	Value
Publication number	US-9750523-B2
Application number	US-201615220858-A
Country	US
Kind code	B2
Filing date	Jul 27, 2016
Priority date	Feb 17, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A ultrasonic treatment apparatus includes a gradual decrease detecting section detecting a gradual decrease start point at which a ultrasonic impedance value starts to gradually decrease, and a peak judging section judging whether or not a held tentative peak value that is a ultrasonic impedance value at the gradual decrease start point is a target peak. The ultrasonic treatment apparatus includes an ultrasonic control section outputting a vibration generating electric power in a second ultrasonic output mode where incision performance provided by an ultrasonic vibration becomes smaller than that in a first ultrasonic output mode before a peak detection point, when at least a prescribed time passes from the peak detection point at which the target peak is detected.

First claim

What is claimed is:

1. An ultrasonic treatment apparatus comprising:
an electric power source configured to output a vibration generating electric power;
an ultrasonic transducer configured to generate an ultrasonic vibration when the vibration generating electric power is supplied from the electric power source;
a treatment section which is configured to perform a treatment by use of the ultrasonic vibration generated in the ultrasonic transducer;
a jaw which is openable and closable relative to the treatment section, and which includes a contact section contactable with the treatment section in a state where the jaw is closed relative to the treatment section;
an impedance detecting section configured to detect an ultrasonic impedance value of the ultrasonic transducer with time, in a state where the vibration generating electric power is output from the electric power source;
a gradual decrease detecting section configured to detect a gradual decrease start point at which the ultrasonic impedance value starts to gradually decrease on the basis of detection results in the impedance detecting section;
a tentative peak value holding section configured to hold the ultrasonic impedance value at the detected gradual decrease start point as a tentative peak value;
a peak judging section configured to judge whether or not the held tentative peak value is a target peak of a detection target by comparing, to the held tentative peak value, changes with time of the ultrasonic impedance value after the gradual decrease start point; and
an ultrasonic control section configured to control an output state of the vibration generating electric power from the electric power source, the ultrasonic control section being configured to output the vibration generating electric power from the electric power source in a second ultrasonic output mode where incision performance provided by the ultrasonic vibration in the treatment section becomes smaller than that in a first ultrasonic output mode before a peak detection point on the basis of a determination in the peak judging section, when at least a prescribed time passes from the peak detection point at which the target peak is detected.

2. The ultrasonic treatment apparatus according to claim 1 ,
wherein, in the second ultrasonic output mode, the ultrasonic control section is configured to control the output state of the vibration generating electric power from the electric power source so that an average vibration velocity of the treatment section provided by the ultrasonic vibration during a predetermined unit time becomes smaller than that in the first ultrasonic output mode.

3. The ultrasonic treatment apparatus according to claim 1 ,
wherein the ultrasonic control section is configured to control the output state of the vibration generating electric power from the electric power source so that the treatment section is vibrated with a fixed first amplitude in the first ultrasonic output mode and so that the treatment section is vibrated with a fixed second amplitude smaller than the first amplitude in the second ultrasonic output mode.

4. The ultrasonic treatment apparatus according to claim 1 ,
wherein the ultrasonic control section is configured to change an amplitude of the ultrasonic vibration in the treatment section between the first ultrasonic output mode and the second ultrasonic output mode by adjusting at least one of an electric power value of the vibration generation electric power and a current value of a vibration generating current supplied to the ultrasonic transducer from the electric power source on the basis of an output of the vibration generating electric power.

5. The ultrasonic treatment apparatus according to claim 1 ,
wherein, when a first vibration stage where the treatment section vibrates with a fixed first amplitude and a second vibration stage where the treatment section vibrates with a fixed second amplitude smaller than the first amplitude are defined, the ultrasonic control section is configured to control an output state of the vibration generating electric power from the electric power source so that a time ratio of the first vibration stage to the second vibration stage in the second ultrasonic output mode becomes smaller than that in the first ultrasonic output mode.

6. The ultrasonic treatment apparatus according to claim 5 ,
wherein the ultrasonic control section is configured to periodically change a vibration state provided by the ultrasonic vibration of the treatment section between the first vibration stage and the second vibration stage in the second ultrasonic output mode and,
in the first ultrasonic output mode,
the ultrasonic control section is configured to periodically change the vibration state provided by the ultrasonic vibration of the treatment section between the first vibration stage and the second vibration stage with the same modulation cycle as that in the second ultrasonic output mode, and configured to increase a proportion of the first vibration stage in the modulation cycle to be higher than that in the second ultrasonic output mode, or
configured to continuously maintain the vibration state provided by the ultrasonic vibration of the treatment section at the first vibration stage.

7. The ultrasonic treatment apparatus according to claim 1 ,
wherein, in the second ultrasonic output mode, the ultrasonic control section is configured to control the output state of the vibration generating electric power from the electric power source so that a resonance frequency of the ultrasonic vibration becomes smaller than that in the first ultrasonic output mode.

8. The ultrasonic treatment apparatus according to claim 1 ,
wherein the ultrasonic control section is configured to output the vibration generating electric power from the electric power source in a third ultrasonic output mode in which incision performance provided by the ultrasonic vibration in the treatment section increases to be higher than that in the first ultrasonic output mode only during a set time, which is shorter than the prescribed time, from the peak detection point, and configured to switch to the second ultrasonic output mode after an output in the third ultrasonic output mode.

9. The ultrasonic treatment apparatus according to claim 8 ,
wherein, in the third ultrasonic output mode, the ultrasonic control section is configured to control the output state of the vibration generating electric power from the electric power source so that an average vibration velocity of the treatment section provided by the ultrasonic vibration during a predetermined unit time becomes higher than that in the first ultrasonic output mode.

10. The ultrasonic treatment apparatus according to claim 1 ,
wherein the impedance detecting section is configured to detect a vibration generating current and a vibration generating voltage in the ultrasonic transducer with time, and configured to detect the ultrasonic impedance value on the basis of the detected vibration generating current and vibration generating voltage.

11. The ultrasonic treatment apparatus according to claim 1 , further comprising a notifying section configured to notify that an output state of the vibration generating electric power from the electric power source has been switched after switching from the first ultrasonic output mode to the second ultrasonic output mode.

12. A control unit which is electrically connected with an ultrasonic treatment instrument, the ultrasonic instrument including a treatment section configured to treat a treated target by use of an ultrasonic vibration generated in an ultrasonic transducer, the control unit comprising:
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Assignees

• Olympus Corp

Inventors

• Tsubuku Yoshihiro

Classifications

• A61B2018/00994

  combining two or more different kinds of non-mechanical energy or combining one or more non-mechanical energies with ultrasound · CPC title

• A61B2017/00115

  with audible or visual output · CPC title

• H01L41/042

  Electricity · mapped topic

• A61B2017/00132

  Setting operation time of a device (A61B2017/00123 takes precedence) · CPC title

• A61B2017/00137

  Details of operation mode · CPC title