MAUDE Adverse Event Report: MEDOS INTERNATIONAL SÃ RL CH VELYS NAVIGATION STATION; ORTHOPEDIC STEREOTAXIC INSTRUMENT

Catalog Number	451611000
Medical Device Problem Code	No Apparent Adverse Event (3189)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	12/10/2025
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that during a t4 to l1 posterior spinal fusion procedure, during screw the surgeon deemed that the phantom was inaccurate when t7 and t8 on the left side were lateral to plan.A second spin was completed and when they placed the rest of the screws in the segment, 4 of the screws were considered inaccurate to plan: t6 was lateral on left side, t5 on the right side was deemed medial, t7 on right side was deemed medial and t8 on the right side was deemed medial.Some screws were replaced with free hand navigation and others were not in the spin were completed free hand without navigation.Robot was on the patient's right side.There was patient involvement, but no injuries, medical intervention, or prolonged hospitalization were reported.
Additional Manufacturer Narrative
Product complaint # (b)(4) this report is being submitted pursuant to the provisions of 21 cfr, part 803 (and/or part 4, as applicable).This report may be based on information which has not been investigated or verified prior to the required reporting date.This report does not reflect a conclusion by depuy synthes, or its employees that the report constitutes an admission that the product, depuy synthes, or its employees caused or contributed to the potential event described in this report.Additional narrative: h3, h6: investigation summary: the investigation was conducted by tpm team.The team confirmed the allegation of screw misplacement.The investigation showed that the correct log file was identified.Log review confirmed the device captured a registration mismatch followed by the request to perform an anatomy check step, as defined in this situation.Despite these instructions, the user willingly elected to proceed and upon log review, no evidence of anatomy check performed were found.Furthermore, a non-approved patient array clamp fixation is used by this account.Although the investigation can't conclude on the incidence on the device accuracy of this situation, this could be a factor of instability, leading to a degraded registration for the procedure.Based on these findings, the investigation therefore concludes on user error to be the cause of this reported mispositions.Upon procedure log review, there were no defects found with the device.The user indicated that there was no negative impact to the patient outcome and no patient harm.Implant misplacement is under monitoring and additional monitoring for any potential safety signals will be conducted through complaint trending and other post-market safety surveillance activities.Root cause: based on the review, the most probable cause of screw misplacement is a use error of validating a registration without anatomy check while instructed by the device to do so.The use of a patient array clamp not approved by depuy synthes may lead to increased instability, thus a degraded registration accuracy.No manufacturing record evaluation required as no manufacturer or service-related issue found.If information is obtained that was not available for the initial medwatch, a follow-up medwatch will be filed as appropriate.

• Brand Name: VELYS NAVIGATION STATION
• Common Device Name: ORTHOPEDIC STEREOTAXIC INSTRUMENT
• Manufacturer (Section D): MEDOS INTERNATIONAL SÃ RL CH; chemin-blanc 38; le locle 02400 ; SZ 02400
• Manufacturer (Section G): DEPUY SYNTHES PRODUCTS LLC; 4500 riverside drive; palm beach gardens FL 33410
• Manufacturer Contact: elba bello ; 325 paramount drive; raynham, MA 02767 ; 9083863534
• MDR Report Key: 24292112
• Report Number: 1526439-2026-00127
• Device Sequence Number: 18493725
• Product Code: OLO
• UDI-Device Identifier: 10705034645995
• UDI-Public: (01)10705034645995
• Combination Product (Y/N): N
• Initial Reporter State: DE
• Initial Reporter Country: US
• PMA/510(K) Number: K233228
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial

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: Health Professional
• Device Catalogue Number: 451611000
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 02/06/2026
• Initial Report FDA Received Date: 02/09/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 06/04/2025
• 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: Unknown
• Patient Sequence Number: 1
• Patient Sex: Unknown