Medical Device Chemical Toxicological Risk Assessments...

Presented by

Alan Hood, Toxicologist at the US FDA/CDRH/OPEQ Sandi Schaible, Senior Director at WuXi AppTec

About this talk

Medical device chemical toxicological risk assessment is challenging because the risk assessor often needs to consider the many types of device intended uses, many types of materials used in design and manufacturing, and many types of intentional and unintentional chemicals that are or could be present in the final finished device. Medical device intended uses include the type of tissue contact, the contact frequency and duration, and the susceptibility of the device user to chemical exposure. Material factors include the material type (e.g., alloy, polymeric, ceramic, or natural), material properties (e.g., alloy surface characteristics, polymer plasticity, or polymer manufacturing process), and material chemical composition (e.g., chemical formulation, potent toxicants (if present), and the rate and duration of release). How to apply these considerations is described in the U.S. Food and Drug Administration (FDA) 2023 guidance Use of International Standard ISO 10993-1, “Biological evaluation of medical devices: Part 1: Evaluation and testing within a risk management process,” International Standard Organization (ISO) 10993 series, and ISO 14971. This presentation will describe how chemical toxicological risk assessment fits into the overall medical device biological risk management process (i.e., risk analysis, risk evaluation, or risk control). Additionally, what medical device use and chemical toxicological information to consider from the U.S. FDA 2023 guidance and ISO documents when estimating chemical toxicological risk will be covered, such as: approaches for characterizing the applicable chemical specific harm(s), estimating an exposure dose, deriving a tolerable intake (TI), and other critical factors to consider that could be useful in the determination of whether exposure to a medical device chemical presents a tolerable risk or could present a possible toxicological risk.
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