Investigation - evaluation: the gunther tulip vena cava filter retrieval set was returned for evaluation (without the snare).A review of the complaint history, device history record, instructions for use (ifu), manufacturing instructions, quality control and visual inspection was conducted during the investigation.The instruction for use (ifu) describes the intended use of the device and specifies "that excessive force should not be used to retrieve the filter." visual inspection of the returned device revealed that the black inner sheath was returned inside the blue sheath and that the fitting had separated from the sheath.The sheath flaring was found according to specifications and the cap and luer were properly attached.The sheath tip as well as catheter tip were squeezed and the blue sheath accordioned approximately 18.5 cm from the flaring.The snare was not available for evaluation as it was not returned.There is no evidence to suggest that this device was not manufactured according to specifications.There were no other reported complaints for this lot number.Additional supplier investigation revealed that the risk is recognized and addressed in risk documentation.Per the risk assessment no further action is required as measures have been previously conducted to address this failure mode.Based on these findings it is suggested that the delivery system was exposed to forces beyond its intended strength during the attempted filter retrieval.The device was replaced by a clover snare with no reported injury to the patient.
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