Evaluation of the general solution compatibility of polymer materials used in medical devices such as syringes

摘要

The general compatibility between various polymers (plastic and elastomeric materials) commonly used in medical devices (e.g., syringes) and common solution-based pharmaceutical products was examined. Processes affecting material/solution compatibility that were considered included drug binding and material leaching. Considering binding, material/water equilibrium binding constants (E b) were determined for 14 organic solutes and the test materials. Correlations between the measured binding constants and the organic solute's octanol/water and hexane/water partition coefficients were obtained. In general, the elastomeric materials behaved similarly and interacted with acidic compounds differently than with neutral compounds. Alternatively, the plastic materials typically used in device components such as syringe barrels were relatively inert in the sense that they only minimally bound even the most lipophilc compounds. Considering leaching, both organic entities and trace elements/metals were extracted from the elastomers over the extraction pH range investigated. The plastic materials generally had lesser quantities of organic leachables than did the elastomers and contained little, if any, extractable trace elements/metals.