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(b)(4).The customer returned one deformed portion of the guide wire for analysis.Definite signs of use were observed in the form of multiple kinks and a knot that was made with the guidewire.Given that guidewire would not have been able to advance out of the advancer assembly or into the patient with the knot present , it is indicative that the knot was a result of the customer handling the device.Visual analysis confirmed that the guide wire was separated at the core wire and coil wire.Per the customer report, the returned portion of the guidewire was the portion that was retained and then surgically removed from the patient.Additionally, the customer reported that they inserted the guidewire with the non-j tip end, which indicates that the proximal end of the guidewire was the portion that was inserted, separated, and then returned for analysis.This was confirmed based on analysis of the guidewire that was received.For the remainder of this investigation, the portion of the guidewire that was returned will continue to be referred to as the proximal end.The proximal weld was observed to be full and spherical.Multiple kinks were observed along the guide wire body.Microscopic examination confirmed the damage and also observed an approximate 90 degree angle kink in the core wire.Based on the customer report and visual examination of the kinks, these are likely the result of the hemostats that were used to secure the retained guidewire.The knot in the guidewire measured at 20mm from the proximal weld.The major kinks in the guide wire measured at 95mm, 155mm, 165mm from the proximal weld.The offset coils in the guide wire measured at 80mm from the proximal weld.The overall length of the guide wire core wire measured 325mm, which is not within the specification of 596mm-604mm per guide wire product drawing.This indicates that at least 271mm of the wire was not returned for analysis.The outer diameter of the guide wire measured 0.798mm which is within the od specification of 0.0788mm-0.826mm per guide wire product drawing.Functional testing could not be performed due to the damage to the returned guide wire.A manual tug test confirmed that the proximal weld was intact.A review of the additional information that was provided by the customer was performed.Review of this as well as the sample returned revealed that the clinician inserted the back end of the guidewire first (without the j-tip).The ifu instructs, "arrow advancer is used to straighten "j" tip of guidewire for introduction of the guidewire into arrow raulerson syringe or a needle.Place tip of arrow advancer - with "j" retracted - into the hole in rear of arrow raulerson syringe plunger or introducer needle".Additionally, the customer reported that they pushed against resistance during insertion and continued to place the catheter, and then pulled against resistance during removal.The ifu states, "precaution: if resistance is encountered when attempting to remove guidewire after catheter placement, guidewire may be kinked around tip of catheter within vessel.In this circumstance, pulling back on guidewire may result in undue force being applied resulting in guidewire breakage.If resistance is encountered, withdraw catheter relative to guidewire about 2-3 cm and attempt to remove guidewire.If resistance is again encountered, remove guidewire and catheter simultaneously".Inspection of the returned guidewire confirmed damage associated with the resistance met during insertion and removal.Finally, the customer stated that they used ultrasound during the procedure, but are not formally trained on ultrasound.The ifu states, "procedure must be performed by trained personnel well versed in anatomical landmarks, safe technique and potential complications".Based on all available information, intentional user error - not per ifu, likely caused or contributed to this event.The ifu provided with the kit informs the user, "arrow advancer is used to straighten "j" tip of guidewire for introduction of the guidewire into arrow raulerson syringe or a needle.Place tip of arrow advancer - with "j" retracted - into the hole in rear of arrow raulerson syringe plunger or introducer needle.Precaution: if resistance is encountered when attempting to remove guidewire after catheter placement, guidewire may be kinked around tip of catheter within vessel.In this circumstance , pulling back on guidewire may result in undue force being applied resulting in guidewire breakage.If resistance is encountered, withdraw catheter relative to guidewire about 2-3 cm and attempt to remove guidewire.If resistance is again encountered, remove guidewire and catheter simultaneously.Procedure must be performed by trained personnel well versed in anatomical landmarks, safe technique and potential complications.".The report of a separated guide wire was confirmed through examination of the returned sample.Visual analysis revealed that the core wire and coil wire were separated and the distal end of the guide wire was not returned.The proximal portion that was returned was significantly deformed and had multiple kinks as well as offset coils.Dimensional analysis did not reveal any anomalies that would indicate a manufacturing related issue.A review of the additional information that was provided by the customer was performed and revealed that the clinician inserted the back end of the guidewire first (without the j-tip).The ifu instructs, "arrow advancer is used to straighten "j" tip of guidewire for introduction of the guidewire into arrow raulerson syringe or a needle.Place tip of arrow advancer - with "j" retracted - into the hole in rear of arrow raulerson syringe plunger or introducer needle".Additionally, the customer reported that they pushed against resistance during insertion and continued to place the catheter, and then pulled against resistance during removal.The ifu states, "precaution: if resistance is encountered when attempting to remove guidewire after catheter placement, guidewire may be kinked around tip of catheter within vessel.In this circumstance , pulling back on guidewire may result in undue force being applied resulting in guidewire breakage.If resistance is encountered, withdraw catheter relative to guidewire about 2-3 cm and attempt to remove guidewire.If resistance is again encountered, remove guidewire and catheter simultaneously".Inspection of the returned guidewire confirmed damage associated with the resistance met during insertion and removal.Finally, the customer stated that they used ultrasound during the procedure, but the user was not formally trained on ultrasound.The ifu states, "procedure must be performed by trained personnel well versed in anatomical landmarks, safe technique and potential complications".Arrow guide wires of this size are designed and manufactured to withstand a tensile force of 2.75 pounds force.The selected insertion site and patient anatomy may present a tortuous path that could contribute to the possibility of guide wire kinking.Guide wire breakage may occur if a force greater than the design specification is applied during removal.Based on all available information, intentional user error - not per ifu, likely caused or contributed to this event.An in-service request has been initiated to instruct the user on proper use of this device.Teleflex will continue to monitor and trend for reports of this nature.
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