MAUDE Adverse Event Report: AOMORI OLYMPUS CO., LTD. DISPOSABLE DISTAL ATTACHMENT

Model Number	D-201-10704
Health Effect - Clinical Code	Hemorrhage/Blood Loss/Bleeding (1888)
Date of Event	11/12/2021
Type of Reportable Event	Serious Injury
Event or Problem Description
It is reported in the literature titled ¿margin marking before colorectal endoscopic mucosal resection and its impact on neoplasia recurrence,¿ two patients experienced delayed bleeding after procedures using a colonoscope and a distal attachment cap.Case with patient identifier (b)(6) reports the scope used in the procedures.Case with patient identifier (b)(6) reports the distal attachment cap used in the procedures.Background and aims: ablation of resection margins after emr of large nonpedunculated colorectal polyps decreases recurrence.Margin marking before emr (emr-mm) may represent an alternative method to achieve a healthy resection margin.We aimed to determine the efficacy of emr-mm in reducing neoplasia recurrence.Methods: we conducted a single-center historical control study of emr cases (emr-mm vs conventional emr) for nonpedunculated polyps >20 mm between 2016 and 2021.For emr-mm, cautery marks were placed along the lateral margins of the polyp with the snare tip.Emr was then performed to include resection of the healthy mucosa containing the marks.We compared recurrence at surveillance colonoscopy after emr-mm versus historical control subjects.Multivariable logistic regression was performed to identify factors associated with recurrence.Results: two hundred ten patients with 210 polyps (median size, 30 mm; interquartile range: 25-40) underwent emr-mm (n z 74) or conventional emr (n z 136).Patient and lesion characteristics were similar between the groups.At a median follow-up of 6 months, the recurrence rate was lower with emr-mm (6/74; 8%) compared with historical control subjects (39/136; 29%) (p <.001).Emr-mm was not associated with an increased rate of adverse events.On multivariable analysis, emr-mm remained the strongest predictor of recurrence (odds ratio,.20; 95% confidence interval,.13-.64; p z.003) aside from polyp size (odds ratio, 2.81; 95% confidence interval, 1.35-6.01; p z.008).Conclusions: in this single-center historical control study, emr-mm of large nonpedunculated colorectal polyps reduced the recurrence risk by 80% when compared with conventional emr.This simple technique may provide an alternative to margin ablation.Two cases (2.7%) of delayed bleeding occurred after emr-mm as compared with 9 cases (6.6%) in the historical control group (p z.33).Six patients had spontaneous resolution after evaluation at the emergency department.Of the 5 patients admitted to the hospital, 1 required blood transfusion and repeat colonoscopy with endoscopic therapy of a bleeding ulcer at the emr site (historical control group).One case of deep mural injury (sydney classification type iii) was identified intraprocedurally in each group (p z.54).In both cases, endoscopic clip closure was performed after completion of the emr.Both patients were admitted for observation with ct showing no evidence of pneumoperitoneum and absence of luminal contrast extravasation.Neither patient required surgery, and both were discharged within 3 days with full recovery.Two patients with post polypectomy syndrome (1 in each group) based on abdominal pain and ct findings were sent home from the emergency department with antibiotics.There is no report of olympus device malfunction reported in any procedure described in this study.Additional details regarding the patients/events were requested with no response as of yet.

• Brand Name: DISPOSABLE DISTAL ATTACHMENT
• Common Device Name: DISPOSABLE DISTAL ATTACHMENT
• Manufacturer (Section D): AOMORI OLYMPUS CO., LTD.; 2-248-1 okkonoki; kuroishi-shi, aomori 036-0 357; JA 036-0357
• MDR Report Key: 15257370
• Report Number: 2429304-2022-00031
• Device Sequence Number: 6710600
• Product Code: FDS
• UDI-Device Identifier: 04953170278266
• UDI-Public: 04953170278266
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 08/19/2022
• Report Date (Section F): 07/26/2022

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?: No
• Operator of Device: Health Professional
• Device Model Number: D-201-10704
• 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: 07/26/2022
• Event Location: Hospital
• Date Report to Manufacturer: 07/26/2022
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 08/19/2022
• 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: PCF.-HQ190I, SN UNKNOWN
• Outcome Attributed to Adverse Event: Other; Required Intervention; Hospitalization
• Patient Sex: Unknown