Optimized deployment of heat-activated surgical staples using thermography

Y Ng, C Song, D McLean, S M Shimi, T G Frank, A Cuschieri, P A Campbell

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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 (approximate to5 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. (C) 2003 American Institute of Physics.

Original languageEnglish
Pages (from-to)1884-1886
Number of pages3
JournalApplied Physics Letters
Publication statusPublished - 1 Sept 2003




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