MAUDE Adverse Event Report: CHRISTOPH MIETHKE GMBH & CO KG GAV 2.0 SYS W/PED.CONTROL RESERV.5/25; HYDROCEPHALUS MANAGEMENT

Model Number	FX153T
Medical Device Problem Code	Obstruction of Flow (2423)
Health Effect - Clinical Code	Hydrocephalus (3272)
Date of Event	02/12/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that a gav 2.0 shunt system (#fx153t) was implanted during a procedure performed on (b)(6) 2025.According to the complainant, the shunt system 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.The complained product was sent to the manufacturer for investigation.
Additional Manufacturer Narrative
Visual inspection during the investigation, no significant deformations or damage of the components were determined.Permeability test: a permeability test has shown that all components are 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 gav 2.0 is not operating within the acceptable tolerance in both positions.A slowed outflow of gav 2.0 in both positions could be determined.Internal inspection: after dismantling of the valves, deposits were found inside.Results based on our investigation results, we can determine that there is a slowed outflow at the gav 2.0.The deposits visible in the valve have led to the change in flow rate.Furthermore, we can determine visible deposits in the pediatric control reservoir.The deposits did not affect the technical properties at the time of the investigation.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.The examination of the ventricular catheter revealed no functional deviations or other abnormalities.The catheter is operating within specifications.The examination of the return shipment is complete with the preparation of this report.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 action is required from our point of view.

• Brand Name: GAV 2.0 SYS W/PED.CONTROL RESERV.5/25
• 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: 24802354
• Report Number: 3004721439-2026-00079
• Device Sequence Number: 10682167
• Product Code: JXG
• UDI-Device Identifier: 04041906142926
• UDI-Public: (01)04041906142926(11)250430(17)300330(10)20082408
• Combination Product (Y/N): N
• Initial Reporter Country: RW
• 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): 04/07/2026

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: FX153T
• Device Catalogue Number: FX153T
• Device Lot Number: 20082408
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 03/10/2026
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 03/10/2026
• Initial Report FDA Received Date: 04/07/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 04/03/2025
• 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: 5 MO
• Patient Sex: Female
• Patient Weight: 9 KG