Upon receipt at our post market quality assurance laboratory, analysis of the lead noted body fluid within the lumen of the lead, which resulted in the reported stylet insertion difficulties.An attempt to insert a new stylet during laboratory testing was unsuccessful, due to the body fluid within the lead lumen.Blood can enter into the lumen during the implant process prior to device attachment.In this case, it appears that blood infiltrated the lead lumen, dried, and formed a clot that made guidewire insertion difficult.
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