MAUDE Adverse Event Report: ATRIUM MEDICAL CORPORATION I-CAST COVERED STENT; STENT, ILIAC

Model Number 85420

Device Problems Material Rupture (1546); Separation Problem (4043)

Patient Problem Occlusion (1984)

Event Date 11/08/2019

Event Type  Injury  

Manufacturer Narrative

On completion of the investigation a follow up report will be submitted.

Event Description

During a bilateral iliac artery angioplasty and stenting procedure, the balloon ruptured and then separated from the catheter.

Event Description

N/a.

Manufacturer Narrative

Analysis: the icast covered stent delivery system was removed from the packaging and inspected.The contents included the icast catheter shaft and the introducer sheath used in the case.The balloon was not provided.The balloon appeared to have been separated from the catheter shaft at the proximal balloon bond weld.This is evident as the shaft has been necked down to a smaller diameter prior to the area where the balloon bond failed.The amount of force required to separate the balloon from the shaft would have had to of exceeded 15 newtons (n) of tensile force.The balloon, during the manufacturing process, is thermally welded joining the balloon to the catheter shaft.In this instance the catheter shaft broke at the thermal weld.The cause of the balloon rupture cannot be determined based on the event details; however, it is possible that there was a calcification surrounding the area that was noted to having a lot of scar tissue.If the balloon had ruptured as mentioned, the balloon separation from the shaft may have occurred when the balloon was withdrawn back into the introducer sheath.In some cases, if all the contrast has not been evacuated from the balloon prior to withdrawal through the sheath, on withdrawal the remaining fluid gets pushed into the distal balloon cone creating a plug that prevents the balloon from coming back through the sheath.If enough force is applied the catheter shaft could break.Based on the condition of the distal tip of the returned sheath this is likely the cause.A full review of the catheter lot history records was performed.Below is an overview of the quality and performance criteria that every lot of icast covered stent systems is tested to.This inspection requires that the catheter lot must pass the following: ability of the stent and delivery system to be passed through the labeled introducer sheath (6fr/7fr) depending on size.Ability to deploy the stent at nominal pressure (8atm).Ability to withdraw the deflated balloon catheter back through the labeled introducer sheath.Ability of the delivery system to withstand 5 inflate/deflate cycles at the rated burst pressure (12atm) without leaks or failures.Balloon burst testing.The balloon must burst over the rated burst pressure specified on the label (12atm).In addition to the final lot qualification testing there are multiple in-process inspections conducted that include the following: balloon hole skive dimensional verification.Stent securement testing.Proximal balloon weld tensile testing as detailed above.Distal tip tensile testing.Catheter leak check.Atrium medical only releases production lots that have passed the aforementioned performance and quality requirements.A review of the proximal balloon bond to shaft tensile test data of 20 catheters from this production lot indicates that the minimum tensile force required to separate the catheter shaft from the balloon was 22 n.The requirement is a minimum of 15 n.This far exceeds the requirement.A review of the balloon burst test data was also reviewed.During the lot qualification testing during the manufacture of the balloon and then again after the balloon is attached to the catheter indicates that the lowest burst volume noted was 19.4 atmospheres.The data consists of 49 burst test samples.This is also well above the product requirement of 12 atmospheres as detailed on the product label.Conclusion: based on the investigation atrium medical corporation cannot conclude that the device was faulty.It is likely that the balloon ruptured on calcifications or scar tissue and was stripped off the catheter shaft when attempting to pull the balloon back into the sheath.

• Brand Name: I-CAST COVERED STENT
• Type of Device: STENT, ILIAC
• Manufacturer (Section D): ATRIUM MEDICAL CORPORATION; 40 continental blvd; merrimack NH 03054
• MDR Report Key: 9310189
• MDR Text Key: 165997402
• Report Number: 3011175548-2019-01161
• Device Sequence Number: 1
• Product Code: NIO
• UDI-Device Identifier: 00650862854206
• UDI-Public: 00650862854206
• Combination Product (y/n): N
• PMA/PMN Number: K050814
• 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: 11/12/2019

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Expiration Date: 08/28/2022
• Device Model Number: 85420
• Device Catalogue Number: 85420
• Device Lot Number: 450509
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 11/21/2019
• Initial Date Manufacturer Received: 11/11/2019
• Initial Date FDA Received: 11/12/2019
• Supplement Dates Manufacturer Received: 12/06/2019
• Supplement Dates FDA Received: 12/06/2019
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Age: 76 YR