MAUDE Adverse Event Report: NXSTAGE MEDICAL, INC. NXSTAGE SYSTEM ONE; HIGH PERMEABILITY HEMODIALYSIS SYSTEM

Model Number	CAR-172-C
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Codes	Hypersensitivity/Allergic reaction (1907); Cough (4457)
Date of Event	09/10/2025
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
A review of the device history record (dhr) was conducted which confirmed that the device met all quality criteria and manufacturing specifications prior to release.The event is consistent with a hypersensitivity type reaction.Hypersensitivity or allergic adverse reactions are known risks of hemodialysis.The nxstage user guide and instructions for use include allergic reaction as a potential risk associated with dialysis therapy and also include warnings to monitor for potential allergic reactions.Biocompatibility of the device has been established.
Event or Problem Description
A report was received on 18 sep 2025 from a health care professional (hcp) regarding an 81-year-old male patient with a medical history including end stage renal disease, who stated the patient experienced itching, coughing, palpitations and laryngospasm approximately 3 minutes after starting their first hemodialysis treatment with the nxstage device on (b)(6) 2025.Additional information was received on 01 oct 2025 from the health care professional (hcp) who stated the patient did not experience any additional symptoms related to the issue and no medical intervention was required.Per the hcp, the patient recovered without sequelae and will not continue treatment with nxstage.

• Brand Name: NXSTAGE SYSTEM ONE
• Common Device Name: HIGH PERMEABILITY HEMODIALYSIS SYSTEM
• Manufacturer (Section D): NXSTAGE MEDICAL, INC.; 350 merrimack street; lawrence MA 01843
• Manufacturer (Section G): MEDIMEXICO S. DE R. L. DE C. V; av. valle imperial no. 10523; parque industrial valle sur; tijuana 22180 ; MX 22180
• Manufacturer Contact: paula rogalski ; nxstage medical, inc.; 350 merrimack street; lawrence, MA 01843 ; 9784505276
• MDR Report Key: 23294878
• Report Number: 3003464075-2025-00108
• Device Sequence Number: 4890055
• Product Code: KDI
• UDI-Device Identifier: M535CAR172C0
• UDI-Public: +M535CAR172C0/$$0326409770406
• Combination Product (Y/N): N
• PMA/510(K) Number: K140526
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 10/14/2025

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 Expiration Date: 03/01/2026
• Device Model Number: CAR-172-C
• Device Catalogue Number: CAR-172-C
• Device Lot Number: 40977040
• 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: 09/18/2025
• Initial Report FDA Received Date: 10/15/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 09/24/2024
• 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
• Outcome Attributed to Adverse Event: Other
• Patient Age: 81 YR
• Patient Sex: Male