Triple C Medical Corporation

South Korea

Triple C Medical Corporation

South Korea

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Jee D.-W.,Triple C Medical Corporation | Kim C.-W.,Korea University
Transactions of the Korean Society of Mechanical Engineers, B | Year: 2011

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, T1-6A1-4V, and unalloyed titanium were used in FEM simulations of the micropia 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. © 2011 The Korean Society of Mechanical Engineers.


Yang Y.-G.,Triple C Medical Corporation | Han G.-B.,Triple C Medical Corporation | Kim C.-W.,Korea University
Transactions of the Korean Society of Mechanical Engineers, B | Year: 2011

Electrosurgical knee wand (EKW) is a high-frequency thermocautery instrument and is often used for coagulation, ablation, excision, and extirpation of knee ligaments and tissues. In order to maximize the success rate, ease, and safety of knee surgery using EKW and radiofrequency ablation it is' necessary to ensure that the EKW selectively approaches the lesion with utmost accuracy and safety. The key feature of this instrument is its excellent maneuverability. Hence, the authors constructed a tensile spring model based on a shape memory alloy (SMA), which exhibits the shape memory effect This model can be used in knee surgery as it is considered the most biocompatible femorotibial surgical actuator. The changes in external temperature with current and the thermoelectric characteristics of the SMA were investigated. The relationship between the restoring force and the typical stroke (TS) in response to the conditions in the SMA tensile spring design were evaluated In conclusion, as the diameter of the SMA tensile spring decreased, the maximum temperature increased The strain in the actuator caused a stable and proportional increase in the force and induced current for up to 15s, but this increase became very unstable after 30s. Moreover, the relationship between the current and the TS was more stable than that between the current and the restoring force. © 2011 The Korean Society of Mechanical Engineers.


Oh D.-J.,Andong National University | Kim C.-W.,Korea University | Kim T.-Y.,Triple C Medical Corporation | Lee H.-S.,Triple C Medical Corporation | Kim J.-J.,Hanyang University
Transactions of the Korean Society of Mechanical Engineers, B | Year: 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.


Oh D.-J.,Andong National University | Kim C.-W.,Korea University | Yang Y.-G.,Triple C Medical Corporation | Kim T.-Y.,Triple C Medical Corporation | Kim J.-J.,Hanyang University
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2010

Shape Memory Alloy (SMA) has recently received attention in developing implantable surgical equipments and it is expected to lead the future medical device market by adequately imitating surgeons' flexible and delicate hand movement However, SMA actuators have not been used widely because of their nonlinear behavior called hysteresis, which makes their control difficult Hence, we propose a parameter, t1, which is necessary for temperature control, by analyzing the open-loop step response between current and temperature and by comparing it with the values of linear differential equations. t1 is a pole of the transfer function in the invariant linear model in which the input and output are current and temperature, respectively; hence, t1 is found to be related to the state variable used for temperature control. When considering the parameter under heat treatment conditions, Tmax was found to assume the lowest value, and t1 was irrelevant to the heat treatment.


Hwang J.-H.,Triple C Medical Corporation | Kim C.-W.,Korea University
Transactions of the Korean Society of Mechanical Engineers, B | Year: 2012

The mechanical behavior of the polymeric material, HOPE depends on both time and temperature. The study of the tensile behavior at different strain rates is important in engineering design of the orthopedics device such as X-band plate. The mechanical properties and defonnation mechanisms of HOPE are strongly dependent on the applied strain rate. Generally, the deformation behavior of HOPE based on the stress-strain curve is complex because of the highly inhomogeneous nature of plastic deformation, particularly that of necking. Therefore, we attempted to determine the mechanical behavior of HOPE in this study. Nonnally, tensile testing lUlder various strain rates of the HOPE has been used to determine the mechanical behavior. We perfonned tensile tests at various strain rates (1 to 500 %/min) to analyze the viscoelastic behavior on increasing the strain rate. A tensile stress-strain curve was plotted from the data, and the point of transition was marked to calculate the transition stress, strain, and modulus © 2012 The Korean Society of Mechanical Engineers.


Hong H.,Korea Advanced Institute of Science and Technology | Kim S.,Korea Institute of Machinery and Materials | Kim C.,Korea University | Kim C.,Triple C Medical Corporation | And 2 more authors.
Journal of Biomechanics | Year: 2013

A spring loaded inverted pendulum model successfully demonstrated the oscillatory behavior of the center of mass (CoM) and corresponding ground reaction forces (GRFs) of young healthy subjects. This study questioned whether spring-like leg walking dynamics are consistently observed in the walking of older adults that exhibit different gait characteristics, such as slower gait speed, from the young. Eight young and eight older adult subjects participated in overground walking experiments performed at four different gait speeds, ranging from their self-selected speed to a maximum walking speed. To calculate the effective leg stiffness, the damped compliant leg model with a curved foot was used. The model parameters of leg stiffness and damping constant were optimized to achieve the best fit between model and human GRFs data. We observed that the GRFs data from both age groups were reasonably well fitted by spring-like leg dynamics throughout the broad range of gait speeds. The leg stiffness and damping constant consistently increased as a function of the walking speed in both age groups, but slightly greater variations of the model parameters were observed for the older adults' trials. The results imply that human walking dynamics and the variation with respect to age can be well captured by spring-like leg dynamics. © 2012 Elsevier Ltd.


Patent
Triple c Medical Corporation | Date: 2011-12-28

Provided is an anastomosis device including a first head holding a first anastomosis ring, a second head holding a second anastomosis ring, a first guide bar connected to the first head and switching a release position and a standby position to each other, wherein the first guide bar includes a first rotation groove, a second guide bar connected to the second head and switching the release position and the standby position to each other, wherein the second guide bar includes a second rotation groove, and a rotation driver moving approximately in a parallel direction to the first and second guide bars and including a first guide protrusion and a second guide protrusion, which move along the first and second rotation grooves, respectively.

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