(b)(4).
The customer returned one guide wire for evaluation.
The catheter was not returned.
The guide wire was kinked and showed evidence of use.
Visual examination revealed the guide wire is kinked in two locations in the guide wire body.
The distal j-bend is undamaged.
Microscopic examination of the guide wire confirmed the kinks.
Offset coils were observed in one of the kinks.
Both welds appeared full and spherical.
Visual inspection of the catheter could not be performed as the catheter was not returned.
The kinks in the guide wire body were measured at 20.
3 and 30.
2cm from proximal weld.
The guide wire overall length measured 603mm, which is within specification.
The outside diameter (od) of the guide wire was measured and found to be within specification.
A manual tug test confirmed that both the distal and proximal welds were intact.
A device history record (dhr) review was performed on the guide wire and catheter and no relevant manufacturing issues were identified.
Other remarks: the instructions-for-use provided with this kit describes suggested techniques to minimize the likelihood of guide wire damage during use.
The ifu states that if resistance is encountered when attempting to remove the spring wire guide after catheter placement, the spring wire guide may be kinked about the tip of the catheter within the vessel.
In this circumstance, withdraw the catheter relative to the spring wire guide about 2-3cm and attempt to remove the spring wire guide.
If resistance is again encountered, remove the spring wire guide and catheter simultaneously.
The reported complaint of the guide wire becoming kinked while removing from the catheter was confirmed through visual inspection of the returned sample.
Multiple kinks were observed on the returned guide wire; however, the catheter was not returned for evaluation.
A dhr review did not reveal any manufacturing related issues.
No manufacturing defects were found during this investigation.
Based on these circumstances, it was determined that operational context likely contributed to this event, however, the probable cause of guide wire and catheter resistance could not be determined based upon the information provided and without the catheter being returned.
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