ASP (Advanced Sterilization Products, Johnson & Johnson manufacturer of Plasma (peroxide) Sterilizers) will only validate their own trays for use in their system. However, it is well known in this country (USA) that most of the trays/mats manufactured by the major tray suppliers will work without incident. Many companies use PST Brand trays and silicone mats in the plasma sterilization system and have found no cause for concern.
The real issue with the use of any tray or mat in the plasma sterilization systems is whether the materials placed in the chamber will abort the sterilization cycle. If the cycle is aborted because of materials that interfere with the process, then, of course, the materials must be removed. But if the cycle is completed with no alarm, the material has not interfered with the process.
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