Bioactivities of Chitosan and Its Derivatives - Chitosan Based Hydrogels: Functions and Applications - page 134

(a) (b)

250600 20KV X1.00K 30 μm

221000 20KV X1.00K 30 μm

Figure 3.10
SEM images of ePTFE/CS/Hp vascular grafts after being implanted into veins of a dog: (a) implanted for a week
and (b) implanted for 2 weeks.

embolization. Surface-induced thrombosis on polymeric biomaterials is initiated by the
adsorption of plasma proteins, followed by adhesion and activation of platelets. Attempts
have been made to improve the blood compatibility of chitosan with physical blends,
surface modification, and synthesis of blood-compatible derivatives.

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