Vibrating knife and excision apparatus

• US 20040199193A1
• Filed: 03/29/2004
• Published: 10/07/2004
• Est. Priority Date: 04/07/2003
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hayashi, Tadashi, Miura, Yasushi
• Application Number:
  US10/810,827
• Publication Number:
  US 20040199193A1
• Time in Patent Office: Days
• US Class Current: 606/169
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 2017/320082 for incising tissue

Abstract

Demands have arisen for a vibrating knife such as a biometrical ultrasonic knife which can easily obtain sharp cut surfaces with little possibility of contamination and the like. In order to meet the demands, the excision portion of a vibrating knife such as a biometrical ultrasonic knife which is brought into contact with an excision target such as living body tissue and vibrated in a direction at an angle to the traveling direction in excision so as to excise the target is coated such that the surface of the portion located on the forward side in the traveling direction in excision becomes hydrophobic, and the surface of the portion located on the backward side in the traveling direction in excision becomes hydrophilic.

Claims

1. A vibrating knife comprising an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target, wherein a surface of said excision portion which is located on a forward side in the traveling direction in excision is hydrophobic, and a surface of said excision portion which is located on a backward side in the traveling direction in excision is hydrophilic.

2. The knife according to claim 1, wherein the hydrophobic surface and the hydrophilic surface are respectively coated with a hydrophobic film and a hydrophilic film.

9. An excision apparatus comprising:

a vibrating knife defined in claim 1;

a knife driving portion which vibrates said vibrating knife; and

a driving control portion which controls said knife driving portion to control a vibration mode of said vibrating knife.

10. The apparatus according to claim 9, wherein said driving control portion controls the vibration mode of said vibrating knife to generate elliptic vibration whose ellipsoid coincides with the traveling direction in excision of said vibrating knife.

11. An excision apparatus comprising:

a vibrating knife defined in claim 1;

a knife driving portion which vibrates said vibrating knife; and

a temperature control portion which controls generation of heat by said heater of said vibrating knife.

3. A vibrating knife comprising:

an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target;

a coating which is formed on a surface of said excision portion and changes in property to hydrophobicity or hydrophilicity depending on a temperature; and

a heater which is provided on a portion of said excision portion which is located on a forward side in the traveling direction in excision, and supplies heat to said coating.

4. The knife according to claim 3, wherein said heater comprises a self temperature control type heater.

5. The knife according to claim 3, wherein said coating exhibits the change in property at a temperature higher than a storage temperature for the target and lower than a temperature at which the target deteriorates.

6. A vibrating knife comprising:

an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target;

a coating which is formed on a surface of said excision portion and changes in property to hydrophilicity or hydrophobicity depending on a temperature; and

a vibration enlarging portion which is provided on a portion of said excision portion which is located on a forward side in the traveling direction in excision to enlarge the vibration.

7. The knife according to claim 6, wherein a vibration amplitude of the portion of said excision portion which is located on the forward side in the traveling direction in excision is enlarged by said vibration enlarging portion.

8. The knife according to claim 6, wherein said coating exhibits the change in property at a temperature higher than a storage temperature for the target and lower than a temperature at which the target deteriorates.

12. An excision apparatus comprising:

a vibrating knife defined in claim 6;

and

a knife driving portion which vibrates said vibrating knife.

13. A method of manufacturing a vibrating knife, comprising the steps of:

forming an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target;

forming a hydrophobic film on a surface of a portion of the excision portion which is located on a forward side in the traveling direction in excision; and

forming a hydrophilic film on a surface of a portion of the excision portion which is located on a backward side in the traveling direction in excision.

14. A method of manufacturing a vibrating knife, comprising the steps of:

forming an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target;

forming, on a surface of the excision portion, a film whose property changes to hydrophobicity or hydrophilicity depending on temperature; and

mounting, on a portion of the excision portion which is located on a forward side in the traveling direction in excision, a heater which supplies heat to the film.

15. A method of manufacturing a vibrating knife, comprising the steps of:

forming an excision portion which is brought into contact with a target and vibrated in a direction at an angle to a traveling direction in excision so as to excise the target;

forming, on a surface of the excision portion, a film whose property changes to hydrophilicity or hydrophobicity depending on temperature; and

forming, on a portion of the excision portion which is located on a forward side in the traveling direction in excision, a vibration enlarging portion which enlarges the vibration.