Testing of device from same lot or batch retained by manufacturer

**Definition:** The investigation employed relevant empirical testing of the device of the same lot or batch as that of the suspected device in the reported adverse event in order to support the identification of possible causes for the adverse event. Testing was performed using the device retained by the manufacturer (i.e. was not shipped). Relevant testing would typically be based on test methods used for evaluating safety and performance as described in the latest relevant standards.