TITLE

Optimized deployment of heat-activated surgical staples using thermography

AUTHOR(S)
Ng, Y.; Song, C.; McLean, D.; Shimi, S. M.; Frank, T. G.; Cuschieri, A.; Campbell, P. A.
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/1/2003, Vol. 83 Issue 9, p1884
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have developed a suture analogue, suitable for use in laparoscopic surgery, in the form of a staple constructed from NiTi shape memory alloy (SMA). Closure of the staple is effected by resistive heating via a (50–100 ms) pulse of electrical current (≈5 A). In order to optimize deployment protocols and minimize thermal collateral damage to tissue, the heat sink effect of the electrical contact rails, as well as the presence of contact hotspots must be considered. Here, we have employed high-resolution thermal imaging to observe the dynamic temperature distributions in SMA staples as a function of the pulse parameters. This has facilitated process optimization and also provided data from which to validate computational finite-element models of the heat transport phenomena. © 2003 American Institute of Physics.
ACCESSION #
10664988

 

Related Articles

  • NUMERICAL SIMULATION OF THERMAL EFFECTS IN THIN ACTIVE LASER ELEMENTS. Girdauskas, Valdas; Budinavičus, Audrius; Aleknavičus, Aidas // International Conference: Radiation Interaction with Material & ;2012, p399 

    Temperature distribution, stresses and deformations inside proposed active element geometry were calculated using finite element method. Proposed element consists of two thin plates of active medium bonded to heat sinks, pumped in zig-zag manner. Dependencies of temperature, deformation and...

  • Effects of Nonuniform Base Heating on Single Stack and Multi-Stack MicroChannel Heat Sinks Used for Electronics Cooling. Hegde, Pradeep; Seetharamu, K. N. // Journal of Microelectronic & Electronic Packaging;2010 2nd Quarter, Vol. 7 Issue 2, p90 

    Numerical investigations with regard to the thermal characteristics of water cooled single stack and multistack microchannel heat sinks subjected to nonuniform base heating are conducted. Nonuniformities in base heating are accomplished by applying gradually increasing and gradually decreasing...

  • A Novel Parameter for Predicting Arterial Fusion and Cutting in Finite Element Models. Fankell, Douglas; Kramer, Eric; Cezo, James; Taylor, Ken; Ferguson, Virginia; Rentschler, Mark // Annals of Biomedical Engineering;Nov2016, Vol. 44 Issue 11, p3295 

    Current efforts to evaluate the performance of laparoscopic arterial fusion devices are limited to costly, time consuming, empirical studies. Thus, a finite element (FE) model, with the ability to predict device performance would improve device design and reduce development time and costs. This...

  • Temperature distributions in a heat dissipation system using a cylindrical diamond heat spreader on a copper heat sink. Hui, P.; Tan, H. S. // Journal of Applied Physics;1/15/1994, Vol. 75 Issue 2, p748 

    Introduces an analytical series solution for the problem of temperature distributions in a heat dissipation system consisting of a cylindrical heat spreader on a semi-infinite heat sink. Radial distribution of temperature at the interface and over the surface; Behavior of the average...

  • Direct and absolute temperature mapping and heat transfer measurements in diode-end-pumped Yb:YAG. Chénais, S.; Forget, S.; Druon, F.; Balembois, F.; Georges, P. // Applied Physics B: Lasers & Optics;Jul2004, Vol. 79 Issue 2, p221 

    We report on direct and absolute temperature measurements in a diode-end-pumped Yb:YAG crystal, using a calibrated infrared camera, with a 60 μm spatial resolution. The heat transfer coefficient has been measured, for the first time to our knowledge, with four different types of thermal...

  • Laparoscopic renal surgery: Ongoing progress, promise. Nakada, Stephen Y. // Urology Times;5/1/2008, Vol. 36 Issue 5, p3 

    The article discusses various reports published within the issue, including the effect of ischemic time, excised tissue on post-laparoscopic partial nephrectomy (LPN) and another on the safety of en bloc hilar litigation with the laparoscopic stapler.

  • Five-Year Follow-Up of Laparoscopic Bladder Neck Suspension Using Synthetic Mesh and Surgical Staples. Chau-Su; Rowbotham, Ron // Journal of Laparoendoscopic & Advanced Surgical Techniques;Jun99, Vol. 9 Issue 3, p249 

    Describes a follow-up on patients who underwent laparoscopic adaptation of Burch bladder neck suspension using hernia mesh and surgical staples. Goal of Baruch colposuspension; Techniques in Baruch colposuspension; Comparison of the effectiveness of the mesh/staples and suture techniques of...

  • Modelling of the laser surface nitriding of Ti-6Al-4V alloy - analysis of heat transfer and residual stresses. Labudovic, M; Kovacevic, R // Proceedings of the Institution of Mechanical Engineers -- Part C;2001, Vol. 215 Issue 3, p315 

    A three-dimensional finite element modelling of the laser surface nitriding of Ti-6Al-4V alloy is presented. Design capabilities of ANSYS parametric design language (APDL) were employed for this purpose. The model calculates transient temperature profiles, the dimensions of fusion zone and...

  • A heat transfer study for beamline components in high-power wiggler and undulator beamlines. Part I. Beam stops (invited). Bedzyk, M. J.; Keeffe, M. J.; Schildkamp, W.; Shen, Q. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p1460 

    The heat transfer capabilities of beam stops in CHESS wiggler and undulator beamlines is described. The thermal analysis for the design of these crucial in-vacuum beamline components is based on the use of a finite element analysis computer calculation and experimental heat loading tests.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics