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

Model Number	CAR-172-C
Medical Device Problem Code	Fluid/Blood Leak (1250)
Health Effect - Clinical Code	Hemorrhage/Blood Loss/Bleeding (1888)
Date of Event	02/02/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The returned cartridge was evaluated and confirmed the presence of a blood leak.A device history record (dhr) review was conducted for the reported lot number and confirmed the product was released for distribution having met quality and manufacturing specifications and requirements.The instructions for use states "check the system for blood and fluid leaks during treatment, and pay close attention to the blood line and access connections." all treatments must be administered under a physician's prescription and performed by a trained and qualified person, considered to be competent in the use of this device by the prescribing physician so that alarms and harmful conditions can be responded to promptly.
Event or Problem Description
A report was received on (b)(6) 2026 from a 65-year-old male patient with a medical history including end stage renal disease, who stated an unspecified amount of blood leaked from the cartridge during a home hemodialysis treatment on (b)(6) 2026.Additional information was received on 06 feb 2026 from the home therapy nurse (htn) who stated the patient did not experience any symptoms and no medical intervention was required.The patient continues to treat with the nxstage system.

• 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: 24365356
• Report Number: 3003464075-2026-00013
• Device Sequence Number: 9652476
• Product Code: KDI
• UDI-Device Identifier: M535CAR172C0
• UDI-Public: +M535CAR172C0/$$092650277059G
• Combination Product (Y/N): N
• Initial Reporter State: KY
• Initial Reporter Country: US
• 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: Consumer
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial
• Report Date (Section B): 02/17/2026

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: Lay User/Patient
• Device Expiration Date: 09/01/2026
• Device Model Number: CAR-172-C
• Device Catalogue Number: CAR-172-C
• Device Lot Number: 50277059
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 02/11/2026
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/02/2026
• Initial Report FDA Received Date: 02/17/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 02/25/2025
• 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: Other
• Patient Age: 65 YR
• Patient Sex: Male
• Patient Weight: 93 KG