The sample returned, the intravascular part of the catheter, had a length of 10.5 cm.It was stretched at its proximal end and showed typical signs of tensile elongation.Its proximal end was covered with fibrin tissue.This was obviously the cause for catheter breakage: when the catheter reached the end with fibrin tissue, removal stopped.As the user continued to pull, the catheter stretched and ruptured finally.Having checked the batch history records, no abnormalities were found.In the products ifu we warn:"do not over stretch the catheter as it may rupture, and rebound into the insertion site, causing a catheter embolism.".
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