MAUDE Adverse Event Report: OLYMPUS MEDICAL SYSTEMS CORP. SINGLE USE ELECTROSURGICAL KNIFE

Model Number	KD-640L
Health Effect - Clinical Codes	Perforation (2001); Appropriate Clinical Signs, Symptoms and Conditions Term/Code Not Available (4581)
Date of Event	08/06/2020
Type of Reportable Event	Serious Injury
Event or Problem Description
Olympus was notified of the following literature article, endoscopic mucosal incision and muscle interruption (mimi) for the treatment of zenker¿s diverticulum (zd).All patients with zd who were treated by flexible endoscopy at our institution between january 2015 and february 2020 were identified by a retrospective chart review.Dysphagia symptoms were assessed using a validated scoring system.Nineteen patients with zd underwent mimi (mean age 76.1 years, 68.1% male) and seven patients underwent non-tunneled flexible endoscopic approach (mean age 64.4 years, 85.7% male) during the study period.The authors concluded mimi is a technically feasible and effective treatment for zd.Care should be taken in patients with a cricopharyngeal bar and small zd, as this may increase the risk of perforation.Larger studies with long-term follow-up are needed to determine if mimi reduces the risk of symptom recurrence when compared to non-tunneled flexible endoscopic approaches.All cases were performed using the olympus (b)(4) with a non-olympus beveled silicone-based endoscopic cap.The vertical incisions were made with the triangle tip olympus kd-640l on cutting current (effect 2-1-2) and a non-olympus electrosurgical generator.The following adverse events were reported: (b)(6): 1 severe perforation requiring open surgical repair and with retropharyngeal abscess formation and mediastinitis necessitating transcervical washout and pharyngeal repair.Non-tunneled flexible endoscopic approach group: 1 moderate contained perforation, treated non-operatively with short course of oral antibiotics.1 readmission with moderate neck crepitus, treated conservatively.Patient identifier (b)(6) is for gif-hq190 and the reported adverse events.Patient identifier (b)(6) is for kd-640l and the reported adverse events.This report is for 2 of 2 for patient identifier (b)(6) is for kd-640l and the reported adverse events.

• Brand Name: SINGLE USE ELECTROSURGICAL KNIFE
• Common Device Name: SINGLE USE ELECTROSURGICAL KNIFE
• Manufacturer (Section D): OLYMPUS MEDICAL SYSTEMS CORP.; 2951 ishikawa-cho; hachioji-shi, tokyo-to 192-8 507; JA 192-8507
• MDR Report Key: 12961850
• Report Number: 2951238-2021-00445
• Device Sequence Number: 5449333
• Product Code: KNS
• UDI-Device Identifier: 04953170208423
• UDI-Public: 04953170208423
• Combination Product (Y/N): N
• Initial Reporter State: OH
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 12/08/2021
• Report Date (Section F): 11/08/2021

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?: No
• Operator of Device: Health Professional
• Device Model Number: KD-640L
• Device Lot Number: UNKNOWN (LITERATURE)
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 11/08/2021
• Event Location: Hospital
• Date Report to Manufacturer: 11/08/2021
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 12/08/2021
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: GIF-HQ190,UNKNOWN SERIAL
• Outcome Attributed to Adverse Event: Hospitalization; Required Intervention; Other
• Patient Sex: Unknown