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It was reported that one m6 extraction screw was found bent prior to surgery.Therefore, another m6 extraction screw was used.However, that second one broke during surgery.In order to remove the stem, a third unknown device was used, which was reported to be heavily worn after the procedure.This investigation focused on the device which was found bent prior to surgery.The device was not used for the reported surgery and did not lead to any patient harm.The device, used in treatment, was returned for investigation.It can be confirmed that the thread if the m6 extraction screw is bent.Further signs of use are visible.The production documentation of the returned device was reviewed, however there were no deviations found.Several further complaints were reported for the batch in scope, however regarding the size of the batch, the need for further actions is not indicated.The failure modes and the severity are covered through our risk management files.According to document "processing (cleaning, disinfection and sterilization) of instruments from smith & nephew orthopaedics ag" (lit.N°03389-en 1363 v3 11/19), all instruments must be inspected and controlled for proper functioning after cleaning/disinfection.The failure mode of the returned device can be confirmed, the root cause is attributed to a design issue.To date, based on the available information, the need for further actions is not indicated.Smith and nephew will monitor the devices for further similar issues.The returned device will be discarded.
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