The application of superelastic SMAs in less invasive haemostatic forceps

Yun Luo, Shingo Kodaira, Ye Zhang, Toshiyuki Takagi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A new application of stress-induced transformation of superelastic shape memory alloys (SMAs) for atraumatic haemostatic forceps has been proposed. In conventional haemostats the pressure on the clamping jaws directly reflects the passive response of biological tissues, exhibiting an exponential increase during grasping, thus making control within a safe range difficult. The proposed new concept of haemostatic forceps is to embed superelastic shape memory alloys in conventional forceps and to limit the clamping pressure of the forceps within a safe range via the unique stress-strain characteristics of superelastic SMA during its stress-induced transformation. In the present paper, the potential of such an idea for practical use is demonstrated with a newly developed prototype. It is shown that the critical pressure was successfully controlled in the range of 200-800mmHg, where superelastic SMA wires of 0.2 and 0.3mm in diameter were employed.

Original languageEnglish
Article number014
Pages (from-to)1061-1065
Number of pages5
JournalSmart Materials and Structures
Issue number4
Publication statusPublished - 2007 Aug 1

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering


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