(b)(4).This case was reviewed and investigated according to philips volcano policy.Additional information obtained indicated the wire stuck in the sub-intimal distal/apex lad.The pressure guide wire was removed using an over-the wire (otw) ptca balloon catheter.All portions of the device appeared to be accounted for upon removal.No damage was observed by either the scrub technical or physician.The procedure was completed by rewiring the distal lad lesion with an abbott all star 190cm wire for pci.Visual and microscopic inspections were performed on the returned device.It was observed that the distal coil was stretched to 313mm in length but was intact.The distal end of the core wire was twisted and broken.Approximately 21.5mm of the core wire extended past the sensor housing.The remaining 8mm of the core wire was still soldered to the dome.The entirety of the core wire appeared to be present.The core wire was broken at the distal tip and, as a result, the distal coil was significantly stretched.This damage likely occurred as a result of mechanical strain during the procedure while the user attempted to free the device from being stuck.Unfortunately, we were unable to conclusively determine through visual and microscopic inspection how the device initially became stuck.The instructions for use (ifu) warn, "never advance, torque or retract a pressure guide wire which meets significant resistance.The ifu also cautions," the volcano pressure guide wire should not be advanced if resistance is encountered.The wire should never be forcibly pushed into a vessel.Any time that resistance is encountered, the wire should be withdrawn under fluoroscopic guidance.In some instances, the wire may kink and must be removed." the manufacturing documentation for this device was reviewed and the device met all quality and manufacturing release criteria.To date, no other complaints were reported for this same failure mode within this lot.We will continue to monitor these types of complaints.
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