지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김규만
- 발행연도
- 2022
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이 논문의 연구 히스토리 (4)
2021
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The dual-lumen microcatheter is often used in tricuspid regurgitation and tricuspid valve repair procedures; it requires sufficient shaft stiffness and trackability to traverse narrow and tortuous blood vessels without buckling. Therefore, existing dual-lumen microcatheters contain a rigid wire to endow the shaft with stiffness and trackability. However, buckling can occur when the catheter enters an extremely narrow and curved blood vessel through the subclavian vein and ventricular septum.
Here, we propose a dual-lumen microcatheter with a braided wire to improve the entry performance into narrow and tortuous blood vessels. To improve the mechanical performance of the catheter, we considered different braid angles and determined the optimal angle. Moreover, we analyzed the mechanical properties (i.e., bending performance, pushability, column strength, and trackability) of the conventional dual-lumen microcatheter with a rigid wire and the braided dual-lumen catheters with various braid angles. In addition, we modeled an actual blood vessel; we investigated resistance during catheter passage through the blood vessel using a trackability test. The quantitative results showed that the proposed braided dual-lumen microcatheter exhibited better entry performance into tortuous blood vessels than did the conventional devices.
Here, we propose a dual-lumen microcatheter with a braided wire to improve the entry performance into narrow and tortuous blood vessels. To improve the mechanical performance of the catheter, we considered different braid angles and determined the optimal angle. Moreover, we analyzed the mechanical properties (i.e., bending performance, pushability, column strength, and trackability) of the conventional dual-lumen microcatheter with a rigid wire and the braided dual-lumen catheters with various braid angles. In addition, we modeled an actual blood vessel; we investigated resistance during catheter passage through the blood vessel using a trackability test. The quantitative results showed that the proposed braided dual-lumen microcatheter exhibited better entry performance into tortuous blood vessels than did the conventional devices.
목차
1. Introduction 11.1 연구배경 11.1.1 최소 침습기반 중재시술(Interventional Procedure) 11.1.2 삼첨판막 역류증 (Tricuspid Regurgitation) 21.1.3 마이크로카테터 (Microcatheter) 31.1.4 카테터의 구조 (The Structure of the Catheter) 41.2 연구동향 및 필요성 61.3 연구목적 및 목표 62. Design & Analysis 82.1 듀얼 루멘 마이크로 카테터 (Dual Lumen Microcatheter) 82.1.1 구조적 특징 (Structural Features) 82.1.2 축 강성 와이어와 편조 와이어 (Stiffness Wire and Braided Wire) 112.2 실험 재료 132.2.1 의료용 열가소성 엘라스토머(PEBAX : Thermoplastic Elastomer Family) 132.2.2 의료용 열가소성 엘라스토머(Vestamid : Thermoplastic Elastomer Family) 142.2.3 의료용 편조 카테터 (Braided Catheter) 153. Experiment 233.1 실험변수 설계 및 실험장치 233.1.1 실험변수 ? 편조 각도 및 PPI (Braid Angle and PPI) 233.1.2 실험장비 ? 굽힘 시험 장비 253.1.3 실험장비 - 의료용 카테터 시험 장비 (중재시술 의료기기 시험 시스템) 273.2 실험 공정 설계 313.2.1 Column Strength 313.2.2 Pushability 343.2.3 Trackability 364. Result & Discussion 414.1 실험결과 (Comparison According to Process Variables) 414.1.1 실험결과 ? Bending Test (Proximal Part) 414.1.2 실험결과 ? Column Strength 434.1.3 실험결과 ? Trackability (Curvature Radius Simulator) 464.1.4 실험결과 정리 ? Process Variables (Braid Angle, PPI) 494.2 실험결과 (Comparison of Stiffness Wire and Braided Wire) 514.2.1 실험결과 - Pushability 514.2.2 실험결과 - Trackability (Curvature Radius Simulator) 534.2.3 실험결과 - Trackability (Vascular Model Experiment) 554.2.4 실험결과 정리 - Comparison of Stiffness Wire and Braided Wire 575. Conclusion 596. Reference 60
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