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Block h6: imdrf device code a0501 captures the reportable investigation finding of handle cannula detached/separated.Block h11: the returned trapezoid rx was analyzed, and a product analysis found the sidecar rx was pushed back 4mm, the working length was bent, and the handle cannula detached.It was not possible to close the basket due to the damage found in the device.Under microscope inspection, both screw dimples were observed in the cannula.It was confirmed this device met manufacturing specification prior to distribution and there were no manufacturing deviations which could have contributed to the reported event.Based on all available information, after product analysis, the handle cannula was found detached from the handle.Both screw dimples were observed on the cannula, but not both had the required depth to keep the cannula attached to the handle, resulting in an inability to close the basket.On the other hand, the side car rx was pushed back 4mm.It is most likely due to the excess of force applied on the thumb ring from the handle when trying to destroy the stone.And by this force applied, the working length tends to "retract" itself and therefore, pushing back the side car rx.Also, the working length was found bent, it is possible that the device manipulation during the procedure or the forced applied could have resulted in the damage observed in the device.All compiled information on this investigation determines that the most probable cause is "quality control deficiency".
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