A single, used cf-250 device was received for investigation.Visual examination of the returned sample revealed (2) fractures in the film, below one of the two tear cap ports, on both sides of the bag.One fracture was approximately 3/4-inch long and the other fracture was approximately 3/8-inch long.No other issues were observed on the bag.Since the leak was reported during the thawing process, the presumption is made that the fracture did not exist prior to freezing.A fracture of the size observed on the returned complaint sample would have resulted in an obvious leak during the filling process at the user's facility prior to freezing.User handling of the device while the bag is in a frozen state could result in a failure mode of this type.There are several possible conditions which could contribute to handling damage: - residual moisture on the outside of the bag when it was placed inside a cassette.Residual moisture could cause the bag to freeze/adhere to a cassette during the freezing process.A condition of this type could cause film damage upon removal of a frozen bag from the cassette.- handling of the bag in the frozen state.The film of a frozen bag is fragile - inadvertent manipulation or impact on the bag could cause the film to fracture.The precautions indicated above are addressed in the product ifu's.A capa has been issued to investigate reports of this nature.
|