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http://dx.doi.org/10.3795/KSME-B.2011.35.11.1139

Stress Distribution in Microvascular Anastomotic Coupler (AnaFix®) Micropins with Respect to the Fillet Radius  

Jee, Dae-Won (R&D Center, Triple-C Medical Corp.)
Kim, Cheol-Woong (Korea Univ. / Triple-C Medical Corp.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.11, 2011 , pp. 1139-1145 More about this Journal
Abstract
An automated anastomotic ring-pin system consisting of both the anastomotic ring-pin system and the coupler device has eliminated the drawbacks of the suture method. High density polyethylene (HDPE), a material with outstanding biocompatibility and injection molding capability, was used in the ring. SUS316 stainless steel, Ti-6Al-4Nb, Ti-6Al-4V, and unalloyed titanium were used in FEM simulations of the micropin. The authors categorized the microvascular anastomotic ring micropins into short neck (SN) and long neck (LN) groups in order to evaluate the effect of the micropin's fillet radius and neck length on the von Mises stress. The micropins were further divided into those with and without fillet. On the basis of the fillet radius rate (FRR), which represents the rate of change in the von Mises stress with respect to the availability and shape of the fillet, and the neck length rate (NLR), which represents the rate of change in the von Mises stress with respect to changes in the length of the neck within the fillet shape, it can be concluded that the SN-3 neck design is the most stable.
Keywords
Microvascular Anastomotic Coupler System; AnaFix$^{(R)}$; Micro Ring-pin System; Stress Distribution; Fillet Radius Rate; Neck Length Rate;
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