Upon receipt, the lead under complaint was found cut 7.5 cm distal to the is-4 connector pin.The analysis showed 46 cm proximal to the lead tip that the lead was found squeezed and damaged.In this region the conductor coil was found fractured, which is assumed to be the root cause of the reported clinical observation.Based on the characteristics, as well as the location of the fracture, it is reasonable to assume that the lead was subject to excessive mechanical forces as the result of clavicular-first rib entrapment.Prior to the analysis of the device, the quality documents accompanying the manufacturing process for this device were re-investigated.All production steps were performed accordingly, and in particular the final acceptance test proved the device functions to be as specified.In conclusion, the analysis did not reveal any sign of a material or manufacturing problem.
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