MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION WALLFLEX COLONIC SOFT STENT SYSTEM WITH ANCHOR LOCK DELIVERY SYSTEM; STENT, COLONIC, METALIC, EXPANDABLE

Model Number M00555770

Device Problems Material Integrity Problem (2978); Positioning Problem (3009)

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

Event Date 05/10/2022

Event Type  Injury  

Event Description

This report pertains to one of two devices used during the same procedure.Refer to manufacturer report #3005099803-2022-02899 for the associated device information.It was reported to boston scientific corporation on may 10, 2022 that two wallflex colonic soft stent system with anchor lock delivery systems were implanted to treat a malignant colonic stricture in the sigmoid colon and as a bridge to surgery during a stent placement procedure performed on (b)(6) 2022.Reportedly, the patient's anatomy was tortuous.During the procedure, the first wallflex colonic soft stent (the subject of this report) was able to be deployed but after stent deployment, the stent was not visible under endoscopic view.The physician suspected a stent malfunction and decided to remove the delivery system.A second wallflex colonic soft stent (the subject of mfr.Report # 3005099803-2022-02899) was deployed; but the same problem occurred, the second stent was not visible under endoscopic view.However, when the physician checked under fluoroscopy, it was noted that two wallflex colonic soft stents were implanted in an incorrect position.The stents remain implanted and the procedure was stopped as the patient was sent to emergency surgery for a colostomy and colon resection.The patient's condition following the procedure is reported to be stable.

Manufacturer Narrative

(b)(4) captures the reportable event of stent positioning issue.Medical device problem code a04 captures the reportable event of stent not visible under eus or fluoroscopy.(b)(4) captures the surgical intervention of colostomy and colon resection to treat the patient.The complainant indicated that the device remains implanted and will not be returned for evaluation; therefore, a problem analysis of the complaint device could not be completed.If any further relevant information is identified, a supplemental medwatch will be filed.

Manufacturer Narrative

Block h6: medical device problem code a1502 captures the reportable event of stent positioning issue.Conclusion code d17 is being used in lieu of an adequate conclusion code for device not returned.Impact code f19 captures the surgical intervention of colostomy and colon resection to treat the patient.Block h10: the complainant indicated that the device remains implanted and will not be returned for evaluation; therefore, a problem analysis of the complaint device could not be completed.If any further relevant information is identified, a supplemental medwatch will be filed.Block h11: block h6 (device codes) has been corrected.

Event Description

Note: this report pertains to one of two devices used during the same procedure.Refer to manufacturer report 3005099803-2022-02899 for the associated device information.It was reported to boston scientific corporation on may 10, 2022 that two wallflex colonic soft stent system with anchor lock delivery systems were implanted to treat a malignant colonic stricture in the sigmoid colon and as a bridge to surgery during a stent placement procedure performed on may 10, 2022.Reportedly, the patient's anatomy was tortuous.During the procedure, the first wallflex colonic soft stent (the subject of this report) was able to be deployed but after stent deployment, the stent was not visible under endoscopic view.The physician suspected a stent malfunction and decided to remove the delivery system.A second wallflex colonic soft stent (the subject of mfr.Report # 3005099803-2022-02899) was deployed; but the same problem occurred, the second stent was not visible under endoscopic view.However, when the physician checked under fluoroscopy, it was noted that two wallflex colonic soft stents were implanted in an incorrect position.The stents remain implanted and the procedure was stopped as the patient was sent to emergency surgery for a colostomy and colon resection.The patient's condition following the procedure is reported to be stable.

Manufacturer Narrative

Blocks b5 and d6b have been updated with additional information received on (b)(6) 2022.Block h6: medical device problem code a1502 captures the reportable event of stent positioning issue.Impact code f19 captures the surgical intervention of colostomy and colon resection to treat the patient.Block h10: a wallflex colonic soft uncovered stent was received for analysis; the delivery system was not returned.The stent was received fully deployed.No issues were noted to the stent during visual inspection.Product analysis could not confirm the reported event of stent positioning issue; the reported event occurred during the procedure and could not be functionally/visually verified.A product labeling review identified that the device was used per the directions for use (dfu) / product label.Additionally, stent misplacement or inadequate expansion is noted within the dfu as a potential complications associated with the use of the device.Therefore, a review and analysis of all available information indicated the most probable cause is known inherent risk of device.A review of the manufacturing documentation for this device revealed that no anomalies or deviations related to the event occurred during manufacturing.

Event Description

Note: this report pertains to one of two devices used during the same procedure.Refer to manufacturer report # 3005099803-2022-02898 and 3005099803-2022-02899 for the associated device information.It was reported to boston scientific corporation on (b)(6) 2022 that two wallflex colonic soft stent system with anchor lock delivery systems were implanted to treat a malignant colonic stricture in the sigmoid colon and as a bridge to surgery during a stent placement procedure performed on (b)(6) 2022.Reportedly, the patient's anatomy was tortuous.During the procedure, the first wallflex colonic soft stent (the subject of this report) was able to be deployed but after stent deployment, the stent was not visible under endoscopic view.The physician suspected a stent malfunction and decided to remove the delivery system.A second wallflex colonic soft stent (the subject of mfr.Report # 3005099803-2022-02899) was deployed; but the same problem occurred, the second stent was not visible under endoscopic view.However, when the physician checked under fluoroscopy, it was noted that two wallflex colonic soft stents were implanted in an incorrect position.The stents remain implanted and the procedure was stopped as the patient was sent to emergency surgery for a colostomy and colon resection.The patient's condition following the procedure is reported to be stable.Additional information received on august 04, 2022 the two wallflex colonic soft stent system with anchor lock delivery systems were deployed in an incorrect location and were removed during a surgical procedure performed on (b)(6) 2022.

• Brand Name: WALLFLEX COLONIC SOFT STENT SYSTEM WITH ANCHOR LOCK DELIVERY SYSTEM
• Type of Device: STENT, COLONIC, METALIC, EXPANDABLE
• 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: 14568619
• MDR Text Key: 293605747
• Report Number: 3005099803-2022-02898
• Device Sequence Number: 1
• Product Code: MQR
• UDI-Device Identifier: 08714729902591
• UDI-Public: 08714729902591
• Combination Product (y/n): N
• Reporter Country Code: TW
• PMA/PMN Number: SIMILAR
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Other,Foreign,Health Professional,Company Representative
• Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date: 08/05/2022

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: 03/02/2024
• Device Model Number: M00555770
• Device Catalogue Number: 5577
• Device Lot Number: 0028974927
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: Yes
• Initial Date Manufacturer Received: 05/10/2022
• Initial Date FDA Received: 06/01/2022
• Supplement Dates Manufacturer Received: 06/22/2022; 07/21/2022
• Supplement Dates FDA Received: 07/13/2022; 08/05/2022
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 03/03/2022
• 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
• Patient Age: 55 YR
• Patient Sex: Male
• Patient Weight: 60 KG