Surgical instrument for adhering to tissues

• US 20050119640A1
• Filed: 10/04/2004
• Published: 06/02/2005
• Est. Priority Date: 10/03/2003
• Status: Abandoned Application

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Sahai, Ranjana, Sverduk, Leroy, Fearing, Ronald S.
• Application Number:
  US10/959,002
• Publication Number:
  US 20050119640A1
• Time in Patent Office: Days
• US Class Current: 606/1
• CPC Class Codes: A61B 10/00 Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis vaccination prophylaxis, vaccination therapy A61B17/20; Sex determination; Ovulation-period determination menstruation tables G06C3/00; Throat striking implements
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/085 with adhesive layer
• CPC Class Codes: A61B 2017/00345 Micromachines, nanomachines, microsystems
• CPC Class Codes: A61B 2017/00402 Piezo electric actuators
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00703 correcting for movement of heart, e.g. ECG-triggered
• CPC Class Codes: A61B 2017/00858 high friction, non-slip on handles A61B2017/00429
• CPC Class Codes: A61B 2017/0243 for immobilizing local areas of the heart, e.g. while it beats trocars attached to inner organs or inner body tissue A61B2017/3488
• CPC Class Codes: A61B 34/70 Manipulators specially adapted for use in surgery
• CPC Class Codes: A61B 34/72 Micromanipulators

Abstract

A surgical device capable of adhering to tissues is disclosed herein. The surgical device includes a micromechanical frame moveably linked to a plurality of micromechanical appendages. A plurality of nano-fibers that mimic adhesion of the Tokay Gecko are disposed at the terminus of each protrusion.

Claims

1. A surgical device adapted to adhere to tissues, comprising:

a micromechanical frame;

a plurality of micromechanical appendages moveably linked to the micromechanical frame; and

a plurality of nano-fibers disposed on the terminus of at least one micromechanical appendage, each nano-fiber having a diameter between 50 nanometers and 2.0 microns and a length between 0.5 microns and 20 microns, wherein each nano-fiber is adapted to provide an adhesive force on the surface of a tissue.

2. The surgical device of claim 1, wherein each nano-fiber is adapted to provide an adhesive force with the tissue of between 0.06 μ

N and 0.20 μ

N.

3. The surgical device of claim 1, wherein each nano-fiber is at an angle between 15 and 75 degrees relative to the foot section.

4. The surgical device of claim 3, wherein at least one said nano-fiber is at an angle between 30 and 60 degrees relative to the foot section.

5. The surgical device of claim 1, wherein a plurality of nano-fibers are disposed at the terminus of each said micromechanical appendage.

6. The surgical device of claim 1, wherein a plurality of stalk portions are disposed at the terminus of each appendage, wherein a portion of plurality of nano-fibers are disposed on the terminus of each stalk portion.

7. The surgical device of claim 5, wherein the terminus of each micromechanical appendage comprises a foot section.

8. The surgical device of claim 1, further comprising a surgical or diagnostic tool disposed on the micromechanical frame.

9. The surgical device of claim 8, wherein the tool is selected from the group consisting of a Doppler flow meter, microphone, probe, retractor, dissector, stapler, clamp, grasper, needle driver, scissors, cutter, ablation or cauterizing element, and surgical stapler.

10. The surgical device of claim 1, wherein the length of the micromechanical frame is less than 4 cm and the width of the micromechanical frame is less than 4 cm.

11. The surgical device of claim 1, wherein the micromechanical frame comprises carbon fiber material.

12. The surgical device of claim 1, further comprising control components to control the movement of the surgical device.

13. A method of adhering the surgical device to a tissue, comprising:

providing a surgical device having a micromechanical frame, a plurality of micromechanical appendages moveably linked to the micromechanical frame, and a plurality of nano-fibers 4 cm disposed on the terminus of at least one micromechanical appendage, each nano-fiber having a diameter between 50 nanometers and 2.0 microns and a length between 0.5 microns and 20 microns,

contacting the terminus of the at least one appendage to a tissue surface, causing at least a portion of the nano-fibers disposed on the at least one appendage adhere to the tissue, to adhere the surgical device to the tissue.

14. The method of claim 13, wherein the contacting step comprises

moving the terminus of the at least one appendage in the direction normal to the tissue;

and

moving the at least one appendage in the lateral direction along the tissue surface, to cause one or more nano-fibers to adhere to the surface.

15. The method of claim 13, wherein the tissue is an organ.

16. The method of claim 14, wherein the organ is a heart.

17. The method of claim 15, wherein the heart is beating.

18. A method of moving a surgical device along the surface of a tissue, comprising:

providing a surgical device having a micromechanical frame, a plurality of micromechanical appendages moveably linked to the micromechanical frame, and a plurality of nano-fibers disposed on the terminus of at least one micromechanical appendage, each nano-fiber having a diameter between 50 nanometers and 2.0 microns and a length between 0.5 microns and 20 microns,

contacting the terminus of at least a portion of the appendages with the tissue surface, causing at least a portion of the nano-fibers disposed on the portion of appendages to adhere to the tissue,

detaching at least one appendage from the tissue by increasing the angle of the terminus of the at least one protrusion relative to the tissue, to break the adhesion of the one or more nano-fibers with the tissue and peeling the appendage away from the tissue;

re-adhering the at least one appendage to the tissue by contacting the at least one appendage in the direction normal to the tissue surface, then moving the at least one appendage in the lateral direction along the tissue surface, to cause at least a portion of the plurality of nano-fibers disposed on the terminus of the appendage to adhere to the tissue.

19. The method of claim 18, wherein the tissue is an organ.

20. The method of claim 19, wherein the organ is a heart.

21. The method of claim 20, wherein the heart is beating.

22. A method of making a surgical device, comprising:

providing a micromechanical frame;

moveably linking a plurality of micromechanical appendages to the micromechanical frame; and

disposing a plurality of nano-fibers on the terminus of at least one micromechanical appendage, each nano-fiber having a diameter between 50 nanometers and 2.0 microns and a length between 0.5 microns and 20 microns, wherein each nano-fiber capable of providing an adhesive force on the surface of a tissue.