MAUDE Adverse Event Report: PERFUSION SYSTEMS OXY/CVR COMBO BB841 FUSION W/BALANCE 26L; OXYGENATOR, CARDIOPULMONARY BYPASS

Model Number	BB841
Medical Device Problem Code	Air/Gas in Device (4062)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/28/2026
Type of Reportable Event	Malfunction
Event or Problem Description
Medtronic received information that during use of a fusion cardiotomy venous reservoir (cvr), it was reported that the customer observed dense large bubbles in the blood within the reservoir of the oxygenator, indicating a risk of air entering the closed extracorporeal circulation system.See attached photos.The device was replaced to complete the procedure.There was no adverse patient effect associated with this event.
Additional Manufacturer Narrative
Medtronic submits this report to comply with fda regulations 21 cfr parts 4 and 803.Medtronic has made reasonable efforts to provide as much relevant information as is available to the company as of the submission date of this report.This report does not constitute an admission or a conclusion by fda, medtronic, or its employees that the device, medtronic, or its employee caused or contributed to the event described in the report.Any required fields that are unpopulated are blank because the information is currently unknown or unavailable.Medtronic will submit a supplemental report if additional relevant information becomes known.
Additional Manufacturer Narrative
Additional information b5.Medtronic received additional information that bubbles began to appear after a period of cardiopulmonary bypass, and they gradually grew larger.No special changes were made to the input parameters.No air was observed in the venous line.All the pipelines were in normal condition, and the overall cardiosurgical procedure went smoothly.There were no abnormalities in the venous line when the bubbles appeared.The implements on the venous line were all used in a routine manner.Vacuum assisted venous drainage (vavd) was applied.The purge line was kept in the closed state and attached to the venous reservoir.Medtronic submits this report to comply with fda regulations 21 cfr parts 4 and 803.Medtronic has made reasonable efforts to provide as much relevant information as is available to the company as of the submission date of this report.This report does not constitute an admission or a conclusion by fda, medtronic, or its employees that the device, medtronic, or its employee caused or contributed to the event described in the report.Any required fields that are unpopulated are blank because the information is currently unknown or unavailable.Medtronic will submit a supplemental report if additional relevant information becomes known.

• Brand Name: OXY/CVR COMBO BB841 FUSION W/BALANCE 26L
• Common Device Name: OXYGENATOR, CARDIOPULMONARY BYPASS
• Manufacturer (Section D): PERFUSION SYSTEMS; 7611 northland dr; brooklyn park MN 55428
• Manufacturer (Section G): PERFUSION SYSTEMS; 7611 northland dr; brooklyn park MN 55428
• Manufacturer Contact: alison sweeney ; parkmore business park west; galway ; EI ; 091708096
• MDR Report Key: 24210193
• Report Number: 2184009-2026-00180
• Device Sequence Number: 12136273
• Product Code: DTZ
• UDI-Device Identifier: 00763000834234
• UDI-Public: (01)00763000834234(17)270808(10)232010727
• Combination Product (Y/N): N
• Initial Reporter Country: CH
• PMA/510(K) Number: K240666
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 02/03/2026

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
• Operator of Device: Health Professional
• Device Model Number: BB841
• Device Catalogue Number: BB841
• Device Lot Number: 232010727
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/28/2026
• Supplement Date Received by Manufacturer: 01/30/2026
• Initial Report FDA Received Date: 01/29/2026
• Supplement Report FDA Received Date: 02/03/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 08/08/2025
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Sex: Unknown