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(b)(4).The customer returned one catheterization device for analysis.Signs of use in the form of biological material were observed on and within the device.Visual analysis revealed biological material within the needle hub and at the distal tip of the needle cannula, despite the customer's report that no blood return was observed.During functional testing, the guidewire was completely stuck within the needle cannula and could not be removed or advanced.No signs of adhesive could be observed due to the biological material on and within the sample.Visual analysis of the guidewire could not be performed as the guidewire remained stuck within the cannula.The outer diameter of the needle measured 0.0284", which is within the specification limits of 0.0280" - 0.0285" per the needle product drawing.The inner diameter of the needle measured 0.019", which is within the specification limits of 0.0190" - 0.0205" per the needle product drawing.Functional testing of the catheterization device was performed per the instructions for use (ifu).The ifu informs the user, "remove guard.Trial advance and retract the guidewire through the needle using the guidewire handle to ensure proper function." the guidewire was stuck within the cannula, and undue force was used to attempt to push it through.The force resulted in the guidewire bending, but it still failed to pass through the needle.A device history record review was performed and no relevant findings were identified.The ifu instructs the user "trial advance and retract guidewire through needle using guidewire handle to ensure proper function." the ifu also cautions the user, "prior to insertion, ensure guidewire is returned to the original position before insertion or blood flashback may be inhibited" and "do not advance guidewire unless there is free blood flashback in needle hub." it is unclear whether the guide wire was fully retracted prior to insertion or whether blood flashback was observed prior to guide wire advancement.The customer report of arterial needle blocked was confirmed through investigation of the returned sample.Visual and functional examination revealed biological material within the catheterization device needle hub and the needle cannula.However, the customer reported that no flash was observed upon initial insertion.Based on the condition of the returned sample, it cannot be determined if the needle cannula was blocked during or before use.No evidence of a manufacturing issue was identified during evaluation of the returned device, and a device history record review was performed, and no relevant findings were identified.Based on these circumstances, the root cause could not be determined.Teleflex will continue to monitor and trend on reports of this nature.
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