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Upon receipt, the lead was found cut 8 cm distal to the is4 connector pin.The insulation was, apart from the present cut, free of injuries.The analysis showed that all wires of the conductor coil were found fractured 40 cm proximal to the lead tip, which is assumed to be the root cause of the 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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