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Studies of poly(ether)urethane pacemaker lead insulation oxidation

✍ Scribed by Thoma, R. J. ;Phillips, R. E.

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
340 KB
Volume
21
Category
Article
ISSN
0021-9304

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✦ Synopsis

Published reports suggest that silver ions may catalyze the oxidation of poly-(ether)urethane soft-segments resulting in the failure of urethane insulations of specific models of pacemaker leads. Attempted oxidation of soft-segment models, poly-(tetra-methylene ether)glycols, by silver nitrate has shown that metal-ion catalyzed oxidative-reduction (MICOR) does not adequately explain observed failures unless antioxidants are removed in process. Such cracking can, however, be explained in terms of a metal ion enhanced environmental stress cracking.

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