Browse > Article
http://dx.doi.org/10.3795/KSME-B.2011.35.12.1301

Relationship between Restoring Force and Typical Stroke with SMA Coil Spring in Electrosurgical Knee Wand  

Yang, Young-Gyu (R&D Center, Triple-C Medical Corp.)
Han, Gi-Bong (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.12, 2011 , pp. 1301-1307 More about this Journal
Abstract
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.
Keywords
Electrosurgical Knee Wand(EKW); Shape Memory Alloy(SMA); Restoring Force; Typical Stroke; SMA Tensile Spring;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 Wu, S.K. and Lin, H.C., 2000, "Recent Development of TiNi-based Shape Memory Alloys in Taiwan," Material Chemical Physics, Vol.64, pp.81-92.   DOI   ScienceOn
2 Humbeeck, J.V., 1999, "Non-medical Applications of Shape-memory Alloys," Material Science Engineering A, Vols.273-275, pp.134-148.   DOI   ScienceOn
3 Kim, C.-W. and Han, G.-B., 2010, "Currentrotation Type Surgical Device," Korean Patent, Triple-C Medical Corp., Regist. No.10-2010-0136378, (28th December, 2010).
4 Kim, C.-W. and Han, G.-B., 2010, "Dial-slide Type Surgical Device," Korean Patent, Triple-C Medical Corp., Regist. No.10-2010-0138777, (30th December, 2010).
5 Kim, C.-W., Oh, D.-J., Kim, T.-Y., Lee, H.-S. and Kim, J.-J., 2010, "Evaluation of Thermoelectric Characteristics of Peltier Thermoelectric Module for Increasing Response Velocity in Shape Memory Alloy (SMA) Steering Catheter," Transactions of the Korean Society of Mechanical Engineers B, Vol.34, No.3, pp.301-307.   과학기술학회마을   DOI   ScienceOn
6 Kim, C.-W., Oh, D.-J., Yang, Y.-G., Kim, T.-Y. and Kim, J.-J., 2010, "Influence of Heat Treatment Conditions on Temperature Control Parameters (t1) for Shape Memory Alloy (SMA) Actuator in Nucleoplasty," Transactions of the Korean Society of Mechanical Engineers A, Vol.34, No.5, pp.619-628.   DOI   ScienceOn
7 Otsuka, K. and Ren, X., 1999, "Recent Developments in the Research of Shape Memory Alloys," Intermetallics, Vol.7, pp.511-528.   DOI   ScienceOn