TY - JOUR
T1 - Mechanical evaluation of resorbable copolymers for end use as vascular grafts
AU - Hanson, S. J.
AU - Jamshidi, K.
AU - Eberhart, R. C.
PY - 1988
Y1 - 1988
N2 - Nonwoven, nonporous, completely resorbable vascular grafts of selected polymeric composition (3 mm ID) were prepared and evaluated for similarity of mechanical properties to arterial blood vessels. Copolymers of L-lactide, D,L-lactide, and ε-caprolactone were selected for diversity of mechanical properties and degradation rates. Two homogeneous grafts were tested: a 50% L-lactide and 50% ε-caprolactone copolymer (L-ε), and 70/30 solution blend of L-ε copolymer and its corresponding D,L-lactide copolymer (D,L-ε). Composite grafts also were tested: 1) a two-layer graft, 2) an alternating layers graft, and 3) a D,L-ε graft reinforced with circumferentially wound poly-L-lactide fibers. The resorbable grafts windowed the physiologic range for circumferential Young's modulus and tensile strength, and were kink resistant. The arterial compliance was greater than that of all solid wall resorbable grafts. Incorporation of porosity into the grafts, which is necessary for tissue ingrowth, is expected to lessen this difference.
AB - Nonwoven, nonporous, completely resorbable vascular grafts of selected polymeric composition (3 mm ID) were prepared and evaluated for similarity of mechanical properties to arterial blood vessels. Copolymers of L-lactide, D,L-lactide, and ε-caprolactone were selected for diversity of mechanical properties and degradation rates. Two homogeneous grafts were tested: a 50% L-lactide and 50% ε-caprolactone copolymer (L-ε), and 70/30 solution blend of L-ε copolymer and its corresponding D,L-lactide copolymer (D,L-ε). Composite grafts also were tested: 1) a two-layer graft, 2) an alternating layers graft, and 3) a D,L-ε graft reinforced with circumferentially wound poly-L-lactide fibers. The resorbable grafts windowed the physiologic range for circumferential Young's modulus and tensile strength, and were kink resistant. The arterial compliance was greater than that of all solid wall resorbable grafts. Incorporation of porosity into the grafts, which is necessary for tissue ingrowth, is expected to lessen this difference.
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M3 - Article
C2 - 3196600
AN - SCOPUS:0023701090
SN - 0889-7190
VL - 34
SP - 789
EP - 793
JO - ASAIO Transactions
JF - ASAIO Transactions
IS - 3
ER -