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A visual, dimensional and functional inspection were performed on the returned guide wire.Although functional testing for difficulty to remove was performed using a guiding catheter, since the account was unsure what caused the resistance, the difficulty to remove was unable to be confirmed.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other incidents and/or complaints reported from this lot.There was no damage or contaminations noted to the guide wire during the inspection prior to use which suggests a product quality issue with respect to manufacture, design or labeling did not contribute to the reported difficulties.It should be noted that the electronic instructions for use for guide wire hi-torque proceed fda for the hi-torque¿ guide wire family only states: the hi-torque family of guide wires have distal ends of varying stiffness.Operate these guide wires carefully so as to not injure the blood vessel, observing the information in these instructions.The higher torque performance, stiffer distal ends, and / or higher advancement force may present a higher risk of perforation or injury than a guide wire with a more pliable distal end.Free movement of the guide wire within the interventional device is an important feature of a steerable guide wire system, because it gives the user valuable tactile information.Test the system for any resistance prior to use.Adjust or replace the hemostatic valve with an adjustable valve if it is found to inhibit guide wire movement.It is recommended that the user determine the source of resistance, exercise caution when removing the device and / or other components as a unit and exchange the device for a new one to complete the procedure.In this case, the reported violation of the ifu did not cause or contribute to the reported complaints as force against resistance was required to remove the device given the clinical situation.In this case, based on the reported information and fourier transform infrared (ftir) spectroscopy analysis, the investigation determined the reported difficulty to remove appears to be related to operational circumstances of the procedure.It is likely that during advancement or the procedure, the guide wire tip became stuck in the totally occluded anatomy causing the difficulty to remove and the noted stretched coils.Manipulation and force during retraction against resistance freed the wire along with unknown debris on the tip.The ftir concluded that the debris on the distal tip was biological tissues and cellulose fibers (plant based) and likely fibers from the medical wipes used in the procedure.The noted teflon coating damage likely occurred during retraction through the torque device and/or other devices used in the procedure.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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