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As reported, the 80cm outback elite re-entry failed to cross on the first attempt.During procedure, when the outback was removed from the patient for a second attempt to cross the lesion, the tip of the outback broke off outside the patient when it was threaded onto the unknown guidewire.The procedure was finished with another outback device.There were no reported patient complications.The patient¿s condition was satisfactory.The device was stored per labeling and opened in the sterile field.The device was prepped as specified by the instructions for use.There were no apparent damages to the device noticed prior to use.All specified ports on the device were flushed, followed by a 30 second pause, and then flushed again.The catheter was held in a straight orientation, with ¿no slack¿ during preparation.The patient¿s anatomy was not tortuous.The users wanted to cross a very calcified lesion; the lesion was severely calcified.The degree of stenosis was 100%.There was total occlusion.The user encountered significant resistance during the procedure.There was no abnormal force required at anytime during the procedure.The event caused an unspecified increase in the duration of the procedure.The event did not cause a condition that requires hospitalization or significant prolongation of existing hospitalization.Other procedural details were requested but are unknown, unavailable, or not applicable.The device will be returned for analysis.
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After further review of additional information received the following sections have been updated accordingly: g4, g7, h1, h2,h3, h6, and h11.Complaint conclusion: as reported, the 80cm outback elite re-entry failed to cross on the first attempt.During procedure, when the outback was removed from the patient for a second attempt to cross the lesion, the tip of the outback broke off outside the patient when it was threaded onto the unknown guidewire.The procedure was finished with another outback device.There were no reported patient complications.The patient¿s condition was satisfactory.The device was stored per labeling and opened in the sterile field.The device was prepped as specified by the instructions for use.There were no apparent damages to the device noticed prior to use.All specified ports on the device were flushed, followed by a 30 second pause, and then flushed again.The catheter was held in a straight orientation, with ¿no slack¿ during preparation.The patient¿s anatomy was not tortuous.The users wanted to cross a very calcified lesion; the lesion was severely calcified.The degree of stenosis was 100%.There was total occlusion.The user encountered significant resistance during the procedure.There was no abnormal force required at any time during the procedure.The event caused an unspecified increase in the duration of the procedure.The event did not cause a condition that requires hospitalization or significant prolongation of existing hospitalization.Other procedural details were requested but are unknown, unavailable, or not applicable.One non-sterile outback elite 80cm re-entry unit was received for analysis inside a plastic bag.The cannula needle was received retracted.During visual inspection, the distal end port was found separated from the distal housing and nosecone assembly, and it was not returned for analysis.No other visible anomalies were observed during the analysis.Note: the outback elite catheters are packaged with the cannula deployed.Sem results showed that the separated area of the nosecone of the outback elite 80 cm re-entry unit presented evidence of material elongations and adhesive residues.The material elongations are commonly associated with separations caused by material tensile overload.Therefore, it is assumed that the catheter and the nosecone material of the device were induced to a tensile force that exceeded the material yield strength prior to the separation.Also, the adhesive residues on the catheter is a sign that the catheter and nosecone were properly glued together.No other anomalies were observed during sem analysis.A product history record (phr) review of lot 17911041 revealed no anomalies or non-conformances during the manufacturing and inspection processes that can be associated with the reported event.The reported ¿cto catheter system failure to cross¿ could not be confirmed due the nature of the complaint.However, the ¿catheter tip/distal tip fractured/separated during prep¿ was confirmed through analysis of the returned device due to the condition in which it was received.The exact cause of the issues experienced by the customer could not be conclusively determined during analysis.Based on the information available for review and the product analysis, procedural/handling factors (such as handling when attempting to cross the very calcified cto lesion or handling after the device was removed from the patient) likely contributed to the separated tip as evidenced by the material elongations and adhesive residues at the distal housing/nosecone assembly noted during sem analysis.This suggests a material tensile overload event occurred that exceeded the material¿s yield strength prior to the separation.Also, the presence of the adhesive residue is a sign that the assembly was properly glued together.Difficulty crossing a lesion or an anatomical structure is a known procedural occurrence, especially with difficult lesions.The consequences of crossing difficulty occurring during clinical use of the device are usually addressed by modification in technique or substitution with another device.Crossing is most commonly related to the patient anatomy, operator technique and appropriate device selection.As cautioned in the instructions for use (ifu), which is not intended as a mitigation, ¿always visualize tracking of the catheter tip over the aorto-iliac bifurcation.If strong resistance is felt during catheter manipulation/delivery, determine the cause of the resistance before proceeding further.Consider using a 3¿4 mm balloon at low atm to dilate points of resistance, as needed, along delivery track.If the cause cannot be determined, withdraw the outback elite re-entry catheter.Excessive rotation, bending or kinking of the outback elite re-entry catheter may affect its performance.Withdraw the outback elite re entry catheter if it becomes excessively kinked.If the guide wire kinks, carefully attempt to remove the wire and replace with a new one.Stop if any resistance is felt when removing wire from the outback elite re-entry catheter.If resistance is encountered, retract the cannula tip back into the shaft and then remove the outback elite re-entry catheter and wire together from the vasculature.Excessive calcification at the site of re-entry may impair performance.¿ neither the phr review nor the product analysis suggests that the event experienced by the customer could be related to the design or manufacturing process of the product.Therefore, no corrective/preventive action will be taken at this time.
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