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); Itching Sensation (1943); Loss of consciousness (2418)
Date of Event	11/18/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
A report was received on 19 nov 2025 from the nurse of a 69-year-old male patient with unspecified pathology stating the patient experienced an allergic reaction (nos) during a hemodialysis treatment on (b)(6) 2025.Additional information was received on 24 nov 2025 from the nurse who stated that the patient became unresponsive at the start of a hemodialysis treatment.The patient awoke, complained of itching and was administered norepinephrine, diphenhydramine, epinephrine and 2.5 liters of saline before being transferred to the emergency department for monitoring.
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.

• 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: 23767560
• Report Number: 3003464075-2025-00130
• Device Sequence Number: 10593933
• Product Code: KDI
• UDI-Device Identifier: M535CAR172C0
• UDI-Public: +M535CAR172C0/$$1026504771254
• Combination Product (Y/N): N
• Initial Reporter Country: CA
• 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): 12/10/2025

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: 10/01/2026
• Device Model Number: CAR-172-C
• Device Catalogue Number: CAR-172-C
• Device Lot Number: 50477125
• 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: 11/19/2025
• Initial Report FDA Received Date: 12/10/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 05/20/2025
• 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
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Age: 69 YR
• Patient Sex: Male