to assess the healing characteristics of knitted dacron conduits sealed with fibrin glue , collagen cross-linked with glutaraldehyde , and collagen cross-linked with formaldehyde , composite conduits , each constructed from two of the three test materials , were implanted in the pulmonary and systemic circulations of sheep and dogs for 3 and 6 months .
C0043240
healing
C0009325
collagen