• Title/Summary/Keyword: Steering Catheter

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Manufacturing of Metal Micro-wire Interconnection on Submillimeter Diameter Catheter (서브-밀리미터 직경의 카테터 표면 위 금속 마이크로 와이어 접착 공정)

  • Jo, Woosung;Seo, Jeongmin;Kim, Taek-Soo
    • Journal of the Microelectronics and Packaging Society
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    • v.24 no.2
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    • pp.29-35
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    • 2017
  • In this paper, we investigated a manufacturing process of metal micro-wire interconnection on submillimeter diameter catheter. Over the years, flexible electronic researches have focused on flexible plane polymer substrate and micro electrode manufacturing on its surface. However, a curved polymer substrate, such as catheter, is very important for medical application. Among many catheters, importance of submillimeter diameter steerable catheter is increasing to resolve the several limitations of neurosurgery. Steering actuators have been researched for realizing the steerable catheter, but there is no research about practical wiring for driving these actuators. Therefore we developed a new manufacturing process for metal micro-wire interconnection on submillimeter diameter catheter. We designed custom jigs for alignment of the metal micro-wires on the submillimeter diameter catheter. An UV curing system and commercial products were used to reduce the manufacturing time and cost; Au micro-wire, UV curable epoxy, UV lamp, and submillimeter diameter catheter. The assembled catheter was characterized by using an optical microscope, a resistance meter, and a universal testing machine.

Electro-fatigue Characteristic of Shape Memory Alloy Applied to the Electrosurgical Knee Wand of Variation of Wand Head Angle in Electrosurgical Knee Surgeries (헤드각이 변화하는 Electrosurgical Knee Wand에 적용된 형상기억합금 스프링의 전기적 피로특성)

  • An, Jae-Uk;Kim, Cheol-Woong;Lee, Ho-Sang;Wang, Joon-Ho;Oh, Dong-Joon
    • Proceedings of the KSME Conference
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    • 2008.11a
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    • pp.1547-1552
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    • 2008
  • The tip of these catheter with straight needles is not able to reach in the vicinity of the disc bulging, which are the cause of the low back pain and because the far indirect radio-frequency treatment results in the decompression, the nucleoplasty has the limit. Many incurable diseases has not been solved due to the unexistence of the advanced technique for the MIS human body catheter device. To increase the possibility of nucleoplasty, the needle tip should be located at the closest area of the lesion. For this reason, the best way to increase the success rate of the operation is that the needle tip should access 3-dimensionally to the operating field as soon as possible. To achieve this aim, our studies are restricted as follows: 1) the SMA catheter design to control the 3-dimensional direction, 2) the security of the immediate response by the positive control of the SMA element thermal distribution using Peltier thermoelectric elements, 3) the aquisition of the control data by monitoring the relationship between the temperature of SMA element and the displacement, and 4) the design of the controller to guarantee the accurate location.

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Evaluation of Thermoelectric Characteristics of Peltier Thermoelectric Module for Increasing Response Velocity in Shape Memory Alloy (SMA) Steering Catheter (형상기억합금(SMA) 스티어링 카테터의 반응속도 향상을 위한 펠티어 열전소자의 열전기적 특성 평가)

  • Oh, Dong-Joon;Kim, Cheol-Woong;Kim, Tae-Young;Lee, Ho-Sang;Kim, Jay-Jung
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.34 no.3
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    • pp.301-307
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    • 2010
  • Actuation using a shape memory alloy (SMA) is considered to be an important technology that will play a leading role in market for next-generation medical devices because an SMA actuator can accurately imitate skillful and delicate hand movements. However, SMA actuators have not been successfully used because of problems in control design caused by the nonlinear hysteresis effect of SMA, which leads to inaccuracies in control systems. In order to overcome the effect, the authors invented a SMA actuator, which could actively and rapidly cool down and heat up, by combining a SMA catheter and a TE module using the Peltier effect. In order to evaluate the TE characteristics of our TE module system, the changes in the temperature with 1) incremental increases in a continuous electric current and 2) the appearance of a discontinuous constant or reverse current are discussed in this paper.

Development & Evaluation of Community-Based Home Care Nursing Service Program (지역사회중심 가정간호사업 개발 및 평가)

  • Lee, Won-Hee;Kim, Cho-Ja;Kang, Kyu-Sook;Oh, Eui-Geum;Park, Hee-Ok;Cho, Won-Jung
    • Research in Community and Public Health Nursing
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    • v.15 no.2
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    • pp.209-217
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    • 2004
  • Purpose: The purpose of this study was to construct the structure, process and outcome of community-based home care nursing service and to examine their validity. Method: There were two steps. The first step was developing the structure and process of community-based home care and the second was evaluating the outcome of community-based home care. Home care services were provided to 25 clients who had health problems. Data on these clients were analyzed. Result: According to Albrecht Model, in the developed structure and process of community-based home care, structure contained facility's philosophy, organization, delivery system, steering committee, office, equipments, medical instruments, the home care nurse and client of home care nursing. Process contained classification of client. nursing diagnosis and nursing intervention. The majority of clients were men (56%). The service was used mostly by people aged over 50 (82%). The most frequent nursing diagnoses were altered urinary elimination (23.2%). impaired skin integrity (21.8%) and risk for infection (17.6%). Nursing interventions included wound care (16.7%), tube care (15.1%) and catheter care (14.5%). Conclusion: Several strategies are suggested from this study: first, activate a referral system within the national health care system: second, increase public information on home care nursing: third, develop home care nursing services for elderly people: and fourth, construct a cooperation system between home care services and social welfare services.

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