Preparation of double-raschel knitted silk vascular grafts and evaluation of short-term function in a rat abdominal aorta

Takahito Yagi, Michiko Sato, Yasumoto Nakazawa, Kimie Tanaka, Masataka Sata, Kenji Itoh, Yoshihide Takagi, Tetsuo Asakura

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51 Citations (Scopus)


Silk fibroin fiber has a long history of use in sutures because of its high strength and toughness. In the work reported in this paper, small-diameter vascular grafts 1.5 mm in diameter and 10 mm in length were prepared by coating a double-raschel knitted silk fiber graft with silk fibroin aqueous solution containing poly(ethylene glycol diglycidyl ether) as a cross-linking agent. The most important character of silk fibroin graft is remodeling, which is never observed for polyester fiber or expanded polytetrafluoroethylene grafts. The double-raschel knitted silk fiber graft with coating has sufficient physical strength and protects the ladder from the end in the implantation process. The coating also gives protection against leakage of blood from the graft, and elasticity to the graft. Eight weeks after implantation of the grafts in rat abdominal aorta, early formation of thrombosis was avoided.

Original languageEnglish
Pages (from-to)89-99
Number of pages11
JournalJournal of Artificial Organs
Issue number2
Publication statusPublished - Jun 1 2011
Externally publishedYes



  • Double-raschel knitting
  • Silk fibroin fiber
  • Small-diameter vascular graft

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering
  • Cardiology and Cardiovascular Medicine

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