Extrusion process for fabrication of pressure-driven steering guidewire압력 구동 능동 조향 가이드와이어 제작을 위한 압출 공정 설계

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Actively steering guidewires and catheters have been researched as an interventional procedure has been developed. Although research has been conducted on actively steering actuators driven by an internal pressure, the body part of the guidewire has not been considered. The body part of the guidewire must satisfy the mechanical properties for the functions to operate, and the outer diameter must be small to be able to fit in small vessels. Since the pressure-driven actively steering guidewire has a hollow tube shape, it is, however, difficult to satisfy both requirements simultaneously. This paper proposes the design of an extrusion process for manufacturing the body part of the pressure-driven micro guidewire. The body part of the previously proposed pressure-driven micro guidewire is redesigned in terms of dimension and construction to be fabricable with the extrusion process. The optimal land length of the die is determined by performing fluid flow simulation of the extrusion process. The extrusion process is designed so that the redesigned body part of the guidewire can be fabricated in an integrated form with a single extrusion process. The body part of the redesigned guidewire is manufactured using the proposed extrusion process system. Experiments have shown that the fabricated guidewire body part has different surface shape compared to the design. The coil part has a lumen, but it is extruded as a convex shape along the coil. The limitations of the proposed extrusion process are analyzed and improvement plans are proposed.
Advisors
Lee, Doo Yongresearcher이두용researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2021
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2021.2,[v, 71 p. :]

Keywords

Catheter▼aMicro catheter▼aGuidewire▼aMicro guidewire▼aExtrusion▼aFlow simulation; 카테터▼a마이크로 카테터▼a가이드와이어▼a마이크로 가이드와이어▼a압출 공정▼a유동 시뮬레이션

URI
http://hdl.handle.net/10203/295046
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=949076&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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