MAUDE Adverse Event Report: COOK IRELAND LTD ZILVER PTX 35 DRUG-ELUTING STENT; NIU STENT, SUPERFICIAL FEMORAL ARTERY, DRUG-ELUTING

Model Number G38482

Device Problem Delivery System Failure (2905)

Patient Problem No Consequences Or Impact To Patient (2199)

Event Type  malfunction  

Manufacturer Narrative

(b)(4).Pma/510(k) # p100022/s001.The investigation into this event is still being carried out.A follow up report will be submitted within the next 30 days with the investigation conclusions.

Event Description

Initial mdr is being submitted based on malfunction precedence.They had a 6x45 cm long sheath over bifurcation and put a zilver across it and got it lined up to deploy.When trying to use the thumbwheel, they met a lot of resistance.The zilver kinked on the inside of the sheath where it crosses the iliac bifurcation.They took it out and utilized another device to complete the procedure successfully.

Event Description

This follow up report is being submitted to updated the investigation results.Initial mdr submitted based on malfunction precedence.They had a 6x45 cm long sheath over bifurcation and put a zilver across it and got it lined up to deploy.When trying to use the thumbwheel, they met a lot of resistance.The zilver kinked on the inside of the sheath where it crosses the iliac bifurcation.They took it out and utilized another device to complete the procedure successfully.

Manufacturer Narrative

(b)(4).Exemption number: e2016031.(b)(4).Pma/510(k) # p100022/s001.Problem statement: "they had a 6x45 cm long sheath over bifurcation and put a zilver across it and got it lined up to deploy.When trying to use the thumbwheel, they met a lot of resistance.The zilver kinked on the inside of the sheath where it crosses the iliac bifurcation.They took it out and utilized another device to complete the procedure successfully." device evaluation: the zisv6-35-125-6-120-ptx device involved in this complaint was returned for evaluation, without the original packaging.With the information provided, a physical examination and document based investigation was conducted.From customer testimony, it is known that the complaint device was advanced over a 0.035¿ diameter wire guide.The device was flushed prior to use.The stent was not deployed, and no portion of the stent remained in the patient.It is unknown if the patient¿s anatomy was severely calcified or tortuous.Pre-dilation was conducted prior to stent deployment.The device related to this occurrence underwent a laboratory evaluation on the 29th march 2018.On evaluation of the returned device, it was observed that the complaint device was returned without the stent, and with the red safety trigger depressed.It was not possible to flush the device.Kinks were observed in the stent retraction sheath (srs) at 94.5cm and 114.5cm from the strain relief.Kinks were observed in the stability sheath (ss) at 71.5cm from the strain relief.The distal inner component was exposed, showing 1.5cm between the white tip and the distal end of the srs.The distal white tip was not damaged.Crinkles were observed on the distal srs, with a 5.5mm pitch.The thumbwheel mechanism could be rotated freely.The device handle was opened, and the stent retraction wire was found to be separated from the stent retraction sheath.Complaint is confirmed as the failure was verified in the laboratory.The stent retraction wire was found to be separated from the stent retraction sheath.The customer was contacted to ask about the aortic bifurcation, patient anatomy and the whereabouts of the stent.After three requests, the information was not provided.The investigation will be updated if the information becomes available.Possible causes for this occurrence could include a tortuous or calcified anatomy, or a tight aortic bifurcation.A difficult anatomy could have caused the kinks and crinkles on the sheaths, leading to resistance during deployment.The resistance could have caused or contributed to the retraction wire separating from the stent retraction sheath.However, as the information has not been provided and the circumstances of use cannot be replicated in a laboratory environment, a definitive root cause cannot be determined.It can be noted that as per the product instruction for use: ¿do not use excessive force to deploy the stent.If excessive resistance is felt when beginning deployment, remove the delivery system without deploying the stent and replace with a new device.¿ a capa has been initiated to document and track the actions taken to investigate the stent retraction wire/stent retraction sheath joint separation.Document review: prior to distribution all zilver ptx devices are subject to visual inspection and functional checks to ensure device integrity as per fqc.A review of the relevant manufacturing records revealed no discrepancies that could have contributed to this complaint.Upon review of complaints, this failure mode has not occurred previously with this lot number.Based on the information available to date, there is no evidence to suggest that there are any manufacturing issues associated with this lot number.Summary: complaint is confirmed as the failure was verified in the laboratory.The stent retraction wire was found to be separated from the stent retraction sheath.The risk was determined to be low.According to the initial reporter, the patient did not experience any adverse effects due to this occurrence.The procedure was completed with another device.Complaints of this nature will continue to be monitored for potential emerging trends.

• Brand Name: ZILVER PTX 35 DRUG-ELUTING STENT
• Type of Device: NIU STENT, SUPERFICIAL FEMORAL ARTERY, DRUG-ELUTING
• Manufacturer (Section D): COOK IRELAND LTD; o halloran road; limerick
• MDR Report Key: 7410537
• MDR Text Key: 105373410
• Report Number: 3001845648-2018-00160
• Device Sequence Number: 1
• Product Code: NIU
• UDI-Device Identifier: 10827002384825
• UDI-Public: (01)10827002384825(17)191031(10)C1447280
• Combination Product (y/n): N
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,health
• Type of Report: Initial,Followup
• Report Date: 04/10/2018

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: G38482
• Device Catalogue Number: ZISV6-35-125-6-120-PTX
• Was Device Available for Evaluation?: Yes
• Was the Report Sent to FDA?: No
• Distributor Facility Aware Date: 03/13/2018
• Event Location: Hospital
• Initial Date Manufacturer Received: 03/13/2018
• Initial Date FDA Received: 04/10/2018
• Supplement Dates Manufacturer Received: 04/10/2018
• Supplement Dates FDA Received: 05/08/2018
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1