Activated polymer articulated instruments and methods of insertion
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A technology of electroactive polymers and polymers, applied in the field of joint-connected devices, can solve problems such as the decline of charging capacitors
Inactive Publication Date: 2006-11-29
NEOGUIDE SYST
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There are many challenges in the doping process and the maintenance of the conductive state after multiple reduction / oxidation reaction cycles
Furthermore, conjugated polymers are not chemically stable and their charge capacitance gradually decays as they cycle
Another challenge faced by conducting polymers is delamination at the electrode / conducting polymer interface
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[0077] Various types of electromechanical actuators have been studied for decades, based on the principle that certain types of polymers deform under certain stimuli. In the 1990s, extensive international research was carried out, many papers were published and several conferences on activated polymer actuators were held. In January 2001, the research was compiled by Yoseph Bar-Cohen in his book entitled "Electroactive Polymer (EAP) Actuators as Artificial Muscles: Reality, Potential and Challenges" (SPIE Press, January 2001) . Activated polymers, as used herein, generally refer to a family of polymers that change when subjected to an appropriate stimulus. See, for example, Bar-Cohen headings 1, 3, and 7, Chapter 1 (pages 1-38), Chapter 4 (pages 89-117), Chapter 5 (pages 123-134), Chapter 6 (pages 139- 184), Chapter 7 (pp. 193-214), Chapter 8 (pp. 223-243), and Chapter 16 (pp. 457-493), all of which are incorporated herein in their entirety.
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Abstract
An electro-polymeric articulated endoscope and method of insertion are described herein. A steerable endoscope having a segmented, elongated body with a manually or selectively steerable distal portion and an automatically controlled proximal portion can be articulated by electro-polymeric materials. These materials are configured to mechanically contract or expand in the presence of a stimulus, such as an electrical field. Adjacent segments of the endoscope can be articulated using the electro-polymeric material by inducing relative differences in size or length of the material when placed near or around the outer periphery along a portion of the endoscope.
Description
[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 10 / 228,583, filed August 26, 2002, which is U.S. Patent Application No. 09, filed February 20, 2001, entitled "Steerable Endoscope and Improved Method of Insertion" / 790,204 (now U.S. Patent US 6,468,203), which in turn claims priority to U.S. Provisional Patent Application No. 60 / 194,140, filed April 3, 2000; and this application is filed on July 13, 2003 A continuation-in-part of filed U.S. Patent Application 10 / 622,801, U.S. Patent Application No. 09 / 969,927, filed October 2, 2001, entitled "Steerable Segmented Endoscope and Method of Insertion" (now U.S. Patent 6,610,007) , which in turn is a continuation-in-part of application NO. Priority to Patent Application No. 60 / 194,140; and this application claims priority to US Provisional Patent Application No. 60 / 496,943, filed August 20, 2003, both of which are incorporated herein by referen...
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