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

Catalog Number ZIV6-35-125-6.0-120-PTX

Device Problem Break (1069)

Patient Problem Reocclusion (1985)

Event Date 09/14/2017

Event Type  Injury  

Manufacturer Narrative

(b)(4).(b)(6).(b)(4).Pma/510(k) #p100022/s001.Investigation pending, a follow up mdr will be submitted with the investigation conclusions.

Event Description

On (b)(6) 2012: two ptx stents were placed in the proximal right sfa.On (b)(6) 2017: restenosis was confirmed in the overlapped site.On (b)(6) 2017: stent fracture (type ii) was confirmed in the ziv6-35-125-6.0-120-ptx at the overlapped site.On (b)(6) 2017: pta was performed and the patient recovered. on (b)(6) 2012: two ptx stents were placed in the proximal right sfa.On (b)(6) 2017: restenosis was confirmed at the point where type ii stent fracture of ziv6-35-125-6.0-120-ptx was observed on the overlap.On (b)(6) 2017: pta was performed and the patient recovered.This report relates to the report of a stent fracture.

Manufacturer Narrative

(b)(4).Exemption number: e2016031.Importer site contact and address: (b)(4).Importer site establishment registration number: (b)(4).Pma/510(k) #p100022/s001.This follow up report is being submitted due to the receipt and review of images relating to this event and the conclusion of this investigation.This report relates to the stent fracture reported.As 2 stents are suspected to be involved in the restenosis event at the overlapped site a separate report has been submitted for each suspect device.Reference reports # 3001845648-2017-00548 and 3001845648-2017-00549.The ziv6-35-125-6.0-120-ptx stent of lot number c775581 was implanted in the patient and is therefore unavailable for evaluation.With the information provided a document based investigation was carried out.The patient had the following pre-existing conditions at the time of the procedure: hypertension, diabetes (type ii) and ever smoked (current smoker).Images were provided to support the complaint investigation.They were reviewed through cook research inc.(cri) and the following comments were provided by the independent reviewer: findings: a single, very limited quality x-ray image of the right thigh is provided, along with the complaint report.The image demonstrates zilver stents spanning at least 24cm from the proximal sfa through the adductor canal.A shorter stent was likely overlapped with the more superior stent in the proximal sfa.Definite identification of all stents was not possible because of limited image quality.An acute bend to the left located just superior to the overlap of what likely were two 12cm long zilver stents had an arrow drawn from it.This likely indicated the reported stent fracture location.The limited image quality precludes confirmation of a type i or ii fracture.Although a fracture could certainly be present, acute bending without fracture is also possible.A type ill fracture is unlikely while type iv and v fractures were not present.Lumen compromise from kink, fracture, or external compression was not evident on the x-ray.Impression: a stent fracture cannot be confirmed because stent elements cannot be resolved by the limited quality image.The acute bend could be secondary to a type ii fracture, as reported, however acute bending without fracture is also possible.Because lumen compromise was not evident on x-ray, restenosis from kink, fracture, or external compression is excluded.Re-stenosis on the basis of neointimal hyperplasia is not confirmed because neointimal hyperplasia cannot be evaluated by x-ray.The long stented length increased the possibility of zilver stent fracture.Significant findings relative to the patient's anatomy were not observed.Significant findings relative to the disease state were not observed.Significant findings relative to the use of the device were not observed.Significant findings relative to the design or performance of the device were not observed.Cause of adverse events was not observed.A stent fracture cannot be confirmed because stent elements cannot be resolved by the limited quality image.The acute bend could be secondary to a type ii fracture, as reported, however acute bending without fracture is also possible.Therefore the complaint is confirmed based on customer testimony.It can be noted that according to clinical opinion received for a similar complaint "there are a number of potential risk factors that could result in stent fracture.To start with, the superficial femoral artery itself is subject to all sorts of forces ¿ bending, twisting, stretching, compressing, etc.¿ which can put stress on stents in this artery, resulting in fractured.Additional potential risk factors for stent fracture that have been identified or suggested include lesion length (longer lesions have greater risk), total occlusions, placement of stent close to a joint (hip or knee), overlapping of stents, and calcification of the vessel." it may be noted that according to packaging insert, stent strut fracture is a known potential adverse event associated with the placement of this device.On review of the information provided, there is no evidence to suggest that the user did not follow the packaging insert for this device.Prior to distribution all zilver ptx devices are subject to visual inspection and functional checks to ensure device integrity.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 the lot number c775581.Based on the information available to date, there is no evidence to suggest that there are any manufacturing issues associated with the lot number c775581.Pta was performed and the patient recovered.Complaints of this nature will continue to be monitored for any potential emerging trends.

Event Description

This follow up report is being submitted due to the receipt and review of images relating to this event and the conclusion of this investigation.Initial report details: on (b)(6) 2012: two ptx stents were placed in the proximal right sfa.On (b)(6) 2017: restenosis was confirmed in the overlapped site.On (b)(6) 2017: stent fracture (type ii) was confirmed in the ziv6-35-125-6.0-120-ptx at the overlapped site.On (b)(6) 2017: pta was performed and the patient recovered.Updated based on new information received on 10/nov/2017: on (b)(6) 2012: two ptx stents were placed in the proximal right sfa.On (b)(6) 2017: restenosis was confirmed at the point where type ii stent fracture of ziv6-35-125-6.0-120-ptx was observed on the overlap.On (b)(6) 2017: pta was performed and the patient recovered.This report relates to the report of a stent fracture.As 2 stents are suspected to be involved in the restenosis event at the overlapped site a separate report has been submitted for each suspect device.Reference reports # 3001845648-2017-00548 and 3001845648-2017-00549.

• Brand Name: ZILVER PTX DRUG-ELUTING PERIPHERAL STENT
• Type of Device: NIU STENT, SUPERFICIAL FEMORAL ARTERY, DRUG-ELUTING
• Manufacturer (Section D): COOK IRELAND LTD; o halloran road; limerick
• Manufacturer Contact: michael galvin ; o halloran road; national technology park; limerick ; 061334440
• MDR Report Key: 7036417
• MDR Text Key: 92158222
• Report Number: 3001845648-2017-00550
• Device Sequence Number: 1
• Product Code: NIU
• UDI-Device Identifier: 10827002513454
• UDI-Public: (01)10827002513454(17)140430(10)C775581
• Combination Product (y/n): N
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,health
• Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date: 11/16/2017

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 11/16/2017
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Catalogue Number: ZIV6-35-125-6.0-120-PTX
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Distributor Facility Aware Date: 11/16/2017
• Event Location: Hospital
• Date Manufacturer Received: 10/19/2017
• Date Device Manufactured: 06/11/2012
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention