MAUDE Adverse Event Report: PERFUSION SYSTEMS AFFINITY NT BALANCE; OXYGENATOR, CARDIOPULMONARY BYPASS

Model Number	511B
Medical Device Problem Code	Gas Output Problem (1266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	11/28/2025
Type of Reportable Event	Malfunction
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.
Event or Problem Description
It was reported that during use of the affinity nt oxygenator, oxygenation levels were reduced, with measurements dropping from 340 to 70.Recurrent episodes of reduced oxygenation were observed after several cases.A comparison with another device showed normal and optimal oxygenation levels, indicating a device-related performance issue.The gas blenders were changed to new ones, but the reduced oxygenation persisted when using the product.No patient complications have been reported as a result of this event.
Additional Manufacturer Narrative
Additional information b5.Medtronic received additional information that the customer could not understand why the 02 was getting reduced and they replaced their devices like gas blenders.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: AFFINITY NT BALANCE
• 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: 23702654
• Report Number: 2184009-2025-01572
• Device Sequence Number: 16125201
• Product Code: DTZ
• UDI-Device Identifier: 00763000187842
• UDI-Public: (01)00763000187842(17)270505(10)231280903
• Combination Product (Y/N): N
• Initial Reporter Country: IN
• PMA/510(K) Number: K191444
• 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): 01/06/2026

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: 511B
• Device Catalogue Number: 511B
• Device Lot Number: 231280903
• 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: 12/01/2025
• Supplement Date Received by Manufacturer: 01/02/2026
• Initial Report FDA Received Date: 12/03/2025
• Supplement Report FDA Received Date: 01/06/2026
• Date Device Manufactured: 05/05/2025
• 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