Tag Archives: medical causation testimony

Fiber Type Crucial In Defending Asbestos Claims

Asbestos defendants are frequently faced with medical causation testimony from the plaintiff that asserts that, because there is no “safe” level of asbestos exposure, any exposure above some ill-defined “background” level is a substantial contributing factor to the plaintiff’s asbestos-related injury. This theory has become the centerpiece of modern asbestos litigation and discourages minimal exposure cases from going to the jury. However, a strong defense can be mounted to a minimal exposure case, particularly if plaintiff alleges exposure to chrysotile asbestos fibers.

For the toxic tort defense lawyer, an understanding of the two major families of asbestos is critical. From a toxicity standpoint, amphibole asbestos fibers are more potentially toxic than fibers of the serpentine family. Amphiboles tend to: (1) be acid resistant; (2) be persistent in the body; (3) be straight fibers; and (4) contain iron. By comparison,chrysotile asbestos, a member of the serpentine family, has a much more lower toxicity profile, particularly in low exposure settings. Chrysotile: (1) breaks down in the body; (2) is acid soluble; (3) has a soft pliable curly shape; and (4) contains dissolvable magnesium.

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