MAUDE Adverse Event Report: CHRISTOPH MIETHKE GMBH & CO KG SHUNTASSISTANT 2.0 25; HYDROCEPHALUS MANAGEMENT

Model Number	FX103T
Medical Device Problem Code	Obstruction of Flow (2423)
Health Effect - Clinical Code	Hydrocephalus (3272)
Date of Event	04/14/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that a shuntassistant 2.0 (#fx103t) was implanted on (b)(6) 2025.According to the complainant, the shunt caused an under-drainage.The patient underwent a revision procedure on (b)(6) 2026.No patient complications were reported as a result of the revision procedure.Same event as #: 3004721439-2026-00134.
Additional Manufacturer Narrative
Visual inspection: during the investigation, no significant deformations or damage of the valve was determined.Permeability test: a permeability test has shown that the shuntassistant 2.0 is permeable.Computer controlled test: to investigate the claim of under-drainage, the opening pressure is measured using a miethke computer controlled testing apparatus which simulates a cerebrospinal fluid flow.The valve is tested in both the horizontal as well as the vertical positions.The results show that the valve operates within the accepted tolerance in the vertical position, but not in the horizontal position.A reduced outflow of was determined.Internal inspection: after dismantling of the valve, organic deposits were found.Results: based on our investigation results, we have determined a slowed outflow in the horizontal position of the shuntassistant 2.0.The deposits visible in the valve have led to the functional impairment.Deposits caused by natural substances found in the body, such as protein, blood, or tissue particles, are among the known and unavoidable risks and side effects of hydrocephalus therapy.Even small amounts of organic deposits can compromise the integrity of the valve.We can exclude a defect at the time of release.The valve met all specifications of the final inspection when released from christoph miethke gmbh & co.Kg.No further regulatory actions are required from our point of view.

• Brand Name: SHUNTASSISTANT 2.0 25
• Common Device Name: HYDROCEPHALUS MANAGEMENT
• Manufacturer (Section D): CHRISTOPH MIETHKE GMBH & CO KG; ulanenweg 2; potsdam, 14469 ; GM 14469
• Manufacturer (Section G): CHRISTOPH MIETHKE GMBH & CO KG; ulanenweg 2; potsdam, 14469 ; GM 14469
• Manufacturer Contact: joerg knebel ; ulanenweg 2; potsdam, 14469 ; GM 14469
• MDR Report Key: 25200066
• Report Number: 3004721439-2026-00135
• Device Sequence Number: 10088554
• Product Code: JXG
• UDI-Device Identifier: 04041906501594
• UDI-Public: (01)04041906501594(11)250905(17)300904(10)20085179
• Combination Product (Y/N): N
• Initial Reporter Country: GM
• PMA/510(K) Number: K190174
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,User Facility,Company Representative
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 05/18/2026

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?: Yes
• Operator of Device: Health Professional
• Device Model Number: FX103T
• Device Catalogue Number: FX103T
• Device Lot Number: 20085179
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 04/22/2026
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 04/22/2026
• Initial Report FDA Received Date: 05/18/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 09/05/2025
• 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
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Age: 7 MO
• Patient Sex: Female
• Patient Weight: 8 KG