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It was reported that during a balloon dilation for a stenosis of the left vertebral artery procedure, a microcatheter and the subject guidewire were first used to perform a lesion crossing and then guiding the devices further distally.The vessel distal to the stenosis was narrow and difficult to guide, and the procedure was being performed while applying torque to the subject guidewire.The subject guidewire could no longer be pushed and pulled, and fluoroscopic images confirmed that the middle of the subject guidewire was fractured.The fractured guidewire was retrieved using a micro snare.The procedure was completed successfully.No clinical consequences were reported to the patient due to this event.
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H4: manufacturing date ¿ added.H3: device evaluated by mfg ¿ updated.H3: summary attached - updated.D4: expiration date - added.D9: product available to stryker ¿ updated.D9: returned to manufacturer on ¿ updated.There are controls in the manufacturing process to ensure the product met specifications upon release.During visual/microscopic inspection, the guidewire was returned broken in two fragments (294.9cm and 4.8cm).The guidewire was kinked in two locations 110cm and 139cm.The guidewire ptfe (polytetrafluoroethylene) was seen to be peeling.The proximal fragment was inspected, and the nitinol tubing was broken/fractured with the core wire exposed.The distal fragment was inspected, and the nitinol tubing was broken/fractured with the core wire and platinum wire exposed and bent.The core wire was seen through the distal tip dome.Functional inspection was not applicable as the guidewire was broken/fractured.The reported event is covered in the device directions for use (dfu).As well, the risk of the reported event is documented in the risk documentation and there are current controls to mitigate the risk of the as reported event.The reported event was confirmed based on analysis.The device failed to meet specifications when received for complaint investigation based on the analyzed anomalies noted to the device.Additional information provided by the customer indicated that the device was confirmed to be in good condition during preparation/prior to use on the patient and was prepared for use as per the dfu, continuous flush was set up and maintained throughout the clinical procedure, the patient's anatomy was severely tortuous, the guidewire tip was shaped 45 degrees, the introducer was used when inserting the guidewire, a microcatheter (non-stryker) was used in the procedure, and resistance was encountered while advancing the guidewire within the patient's anatomy.An attempt was made to retrieve the guidewire with a micro snare, which was successfully done.The guidewire was returned broken in two fragments (294.9cm and 4.8cm).During visual inspection, the nitinol tubing was found to be broken/fractured on the proximal and distal fragments with the core wire slightly exposed on the proximal fragment and the core wire and platinum wire exposed on the distal fragment.The guidewire was also found to be kinked/bent in two locations (110cm and 139cm from the proximal end) and the ptfe coating was found to be peeling.No other anomalies were noted to the returned device.Based on the analysis and information provided, it is probable that the guidewire experienced tension and/or torsion forces during advancement in tortuous anatomy (it was noted that the vessel distal to the stenosis was narrow and difficult to guide) which caused it to kink and fracture.An assignable cause of ¿procedural factors¿ will be assigned to the as reported and as analyzed ¿guidewire broken/fractured during use', the as reported ¿device difficulty engaging target vessel' and the as analyzed ¿guidewire kinked/bent' since these issues are associated with a product that met stryker design and manufacturing specifications and was used in accordance with the dfu but performance was limited due to procedural and/or anatomical factors during use.Based on the analysis, the ptfe coating damage most likely occurred as a result of interaction with the introducer.The damage noted is consistent with backloading the proximal end of the guidewire into the distal end of the introducer and pulling it through the introducer at an angle.An assignable cause of ¿handling damage¿ will be assigned to the as analyzed ¿guidewire ptfe coating peeling¿ since this issue is due to handling of the product or portion of the product during the clinical procedure, upon removal of the product from the packaging, or preparation of the product prior to use.
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It was reported that during a balloon dilation for a stenosis of the left vertebral artery procedure, a microcatheter and the subject guidewire were first used to perform a lesion crossing and then guiding the devices further distally.The vessel distal to the stenosis was narrow and difficult to guide, and the procedure was being performed while applying torque to the subject guidewire.The subject guidewire could no longer be pushed and pulled, and fluoroscopic images confirmed that the middle of the subject guidewire was fractured.The fractured guidewire was retrieved using a micro snare.The procedure was completed successfully.No clinical consequences were reported to the patient due to this event.
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