MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION WALLFLEX DUODENAL; STENT,METALLIC,EXPANDABLE,DUODENAL

Model Number M00565030

Device Problems Positioning Failure (1158); Material Deformation (2976)

Patient Problem No Clinical Signs, Symptoms or Conditions (4582)

Event Date 02/17/2022

Event Type  malfunction  

Event Description

Note: this report pertains to one of the two devices used during the same procedure.Refer to manufacturer report # 3005099803-2022-01218 for the associated device information.It was reported to boston scientific corporation on february 17, 2022 that a wallflex duodenal stent was to be implanted to treat an intestinal obstruction during a stent placement procedure performed on (b)(6) 2022.During the procedure, the stent (the subject of this report) did not deploy.The stent was removed from the patient fully covered by the outer sheath.After stent removal, it was noted that the stent was kinked.A second wallflex duodenal stent was used (the subject of mfr.Report # 3005099803-2022-01218); however, again the stent did not deploy and the stent was found kinked after removal.The procedure was completed with another wallflex duodenal stent.There were no patient complications reported as a result of this event.The patient's condition at the conclusion of the procedure was reported to be stable.

Manufacturer Narrative

Medical device problem code: (b)(4).The device has been received for analysis.Upon completion of the problem analysis of the complaint device, if there is any further relevant information from that review, a supplemental medwatch will be filed.

Event Description

Note: this report pertains to one of the two devices used during the same procedure.Refer to manufacturer report # 3005099803-2022-01217 and # 3005099803-2022-01218 for the associated device information.It was reported to boston scientific corporation on february 17, 2022 that a wallflex duodenal stent was to be implanted to treat an intestinal obstruction during a stent placement procedure performed on (b)(6), 2022.During the procedure, the stent (the subject of this report) did not deploy.The stent was removed from the patient fully covered by the outer sheath.After stent removal, it was noted that the stent was kinked.A second wallflex duodenal stent was used (the subject of mfr.Report # 3005099803-2022-01218); however, again the stent did not deploy and the stent was found kinked after removal.The procedure was completed with another wallflex duodenal stent.There were no patient complications reported as a result of this event.The patient's condition at the conclusion of the procedure was reported to be stable.

Manufacturer Narrative

Block h6: medical device problem code a0406 captures the reportable event of stent kinked.Block h10: a wallflex enteral duodenal stent and delivery system were received for analysis.The stent was returned undeployed and fully covered by the outer clear sheath.Visual examination found the tip of the device was returned fully covered with the outer clear sheath.There was residue of blood inside the clear sheath.The outer clear sheath was kinked and the outer blue sheath was accordioned near the hub handle.A dimensional inspection of the delivery system was performed and found the length of the blue sheath was out of specification.Functional examination was performed and it was not possible to deploy the stent.It was necessary to manually deploy the stent by gripping the outer sheath and pulling the tip distally.No other issues were noted to the stent and delivery system.The reported event of stent failure to deploy was confirmed; the stent was returned fully covered by the outer sheath and it was necessary to manually deploy the stent by gripping the outer sheath and pulling the tip distally.The reported event of stent kinked was not confirmed; no damages were noted to the stent.The damages noted to the delivery system were most likely due to procedural factors encountered during the procedure.It may be that handling and manipulation of the device, the techniques used by the user, the characteristics of the lesion, and normal procedural difficulties, limited the performance of the device and contributed to the tip being fully covered by the outer sheath, the outer clear sheath kinked, the outer blue sheath accordioned and the outer blue sheath length out of specification.Therefore, a review and analysis of all available information indicated the most probable cause is adverse event related to procedure.A review of the manufacturing documentation for this device revealed that no anomalies or deviations related to the event occurred during manufacturing.

• Brand Name: WALLFLEX DUODENAL
• Type of Device: STENT,METALLIC,EXPANDABLE,DUODENAL
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 300 boston scientific way; marlborough MA 01752
• Manufacturer (Section G): BOSTON SCIENTIFIC CORPORATION; ballybrit business park; galway ; EI
• Manufacturer Contact: carole morley ; 300 boston scientific way; marlborough, MA 01752 ; 5086834015
• MDR Report Key: 13772344
• MDR Text Key: 288475340
• Report Number: 3005099803-2022-01217
• Device Sequence Number: 1
• Product Code: MUM
• UDI-Device Identifier: 08714729456506
• UDI-Public: 08714729456506
• Combination Product (y/n): N
• Reporter Country Code: CH
• PMA/PMN Number: K062750
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Other,Foreign,Health Professional,Company Representative,Distributor
• Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date: 04/14/2022

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 Expiration Date: 05/07/2023
• Device Model Number: M00565030
• Device Catalogue Number: 6503
• Device Lot Number: 0027270334
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 03/09/2022
• Is the Reporter a Health Professional?: Yes
• Initial Date Manufacturer Received: 02/17/2022
• Initial Date FDA Received: 03/15/2022
• Supplement Dates Manufacturer Received: 03/24/2022
• Supplement Dates FDA Received: 04/14/2022
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 05/07/2021
• 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 Age: 65 YR
• Patient Sex: Male
• Patient Weight: 69 KG