High maneuverability guidewire with functionally graded properties using new superelastic alloys

Y. Sutou, K. Yamauchi, M. Suzuki, A. Furukawa, T. Omori, T. Takagi, R. Kainuma, Minoru Nishida, K. Ishida

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Nitinol shape memory alloys (SMAs) are attracting considerable attention as core materials for medical guidewires because of their excellent flexibility and shape retention. However, since Nitinol guidewires possess low rigidity, the pushability and torquability of the guidewires are insufficient. On the other hand, although guidewires made of stainless steel have high pushability, plastic deformation occurs easily. We have developed a new class of superelastic guidewires with functionally graded properties from the tip to the end by using new SMA core materials such as Cu-Al-Mn-based or Ni-free Ti-Mo-Sn SMAs. The tip portion of the guidewire shows excellent superelasticity (SE), while the body portion possesses high rigidity. These functionally graded characteristics can be realized by microstructural control. These guidewires with functionally graded properties show excellent pushability and torquability and are considerably easier to handle than conventional guidewires with Nitinol or stainless steel cores. Moreover, a metallic catheter using a Ni-free Ti-based SMA with high biocompatibility is introduced.

Original languageEnglish
Pages (from-to)204-208
Number of pages5
JournalMinimally Invasive Therapy and Allied Technologies
Volume15
Issue number4
DOIs
Publication statusPublished - Aug 1 2006
Externally publishedYes

Fingerprint

Stainless Steel
Plastics
Catheters
nitinol
titanium nickelide
Retention (Psychology)

All Science Journal Classification (ASJC) codes

  • Surgery

Cite this

High maneuverability guidewire with functionally graded properties using new superelastic alloys. / Sutou, Y.; Yamauchi, K.; Suzuki, M.; Furukawa, A.; Omori, T.; Takagi, T.; Kainuma, R.; Nishida, Minoru; Ishida, K.

In: Minimally Invasive Therapy and Allied Technologies, Vol. 15, No. 4, 01.08.2006, p. 204-208.

Research output: Contribution to journalArticle

Sutou, Y. ; Yamauchi, K. ; Suzuki, M. ; Furukawa, A. ; Omori, T. ; Takagi, T. ; Kainuma, R. ; Nishida, Minoru ; Ishida, K. / High maneuverability guidewire with functionally graded properties using new superelastic alloys. In: Minimally Invasive Therapy and Allied Technologies. 2006 ; Vol. 15, No. 4. pp. 204-208.
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