This paper deals with the impact of the mechanical stresses on plasticized PVC infusion tubing. Stresses due to clamping were compared to those due to the use of a peristaltic pump. The degradation of the inner surface of plastic tubing due to a dynamic load with repeated flexion and compression was extensively studied in the case of peristaltic pump stress during extracorporeal (EC) acts. Even if clamping results in a less repeated stress, we show it can also lead to damages on the inner lumen of the tubing, especially in static conditions. As these degradations were responsible of particle shedding in the case of EC processes, a first evaluation of particular contamination was performed on the stressed infusion tubes.

本文讨论了机械应力对增塑 PVC 输液管的影响。将夹紧产生的应力与使用蠕动泵产生的应力进行比较。在体外 (EC) 动作期间蠕动泵应力的情况下，广泛研究了由于动态载荷和反复弯曲和压缩而导致塑料管内表面的降解。即使夹紧导致较少的重复应力，我们表明它也可能导致管道内腔损坏，尤其是在静态条件下。由于这些降解是 EC 过程中颗粒脱落的原因，因此对受压的输液管进行了特定污染的第一次评估。