Analysis: the port was returned with a catheter segment, which extended 5.
7 cm from the base of the port housing, and a fractured-off catheter segment measuring 35.
2 cm long.
The fracture surface was somewhat elliptical, and was smooth and shiny for about one-third of the circumference.
However, it was observed that the silicone-filled suture holes had not been punctured, indicating that the port housing may not have been sutured to the body, and thus permitting unrestrained displacement of the port housing.
Conclusion: the most likely cause of the catheter fracture was that the catheter was repeatedly flexed about the point of fracture.
Cracking initiated and propagated through one-third of the area when the catheter completely fractured.
Prior to complete fracture, abrasion of the fractured surfaces caused them to become smooth.
Catheter fracture is listed as one of the potential complications on the vital-port suggested instructions for use (package insert).
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