MAUDE Adverse Event Report: INTEGRA LIFESCIENCES CORPORATION OH/USA MAYFIELD COMPOSITE SERIES SKULL CLAMP

Catalog Number	A3059
Medical Device Problem Code	Unstable (1667)
Health Effect - Clinical Code	Unspecified Tissue Injury (4559)
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
The mayfield composite series skull clamp (a3059) was returned for evaluation: device history record (dhr) - the dhr was reviewed and shows no abnormalities related to the reported failure.Failure analysis - the investigation of the returned unit shows a stiff rocker arm assembly; however, this would not cause the skull clamp to slip.The unit was serviced over a year ago, and it is recommended that preventive maintenance (pm) be performed.Further, since a patient injury was involved, the unit was sent to quality engineering (qe) for further investigation.Qe confirmed the initial findings of the service team with the observation that the unit had a stiff rocker arm assembly with no other issues observed.To resolve the observed issues, all worn components will be replaced with new parts along with general maintenance and cleaning.Root cause - the complaint is not confirmed for slippage.When the clamp is properly positioned and put under pressure, it did not move.Additionally, the unit was serviced over a year ago and is recommended for pm servicing.The probable root cause of the reported complaint is improper or suboptimal placement of the skull clamp on the patient.No further corrective action is required based on the acceptability of risk and no adverse trends were identified.This will be monitored and trended going forward.At present, we consider this complaint to be closed.
Event or Problem Description
A facility reported that the two pin rocker arm of the mayfield composite series skull clamp (a3059) moved while in locked position resulting in patient injury.

• Brand Name: MAYFIELD COMPOSITE SERIES SKULL CLAMP
• Common Device Name: MAYFIELD
• Manufacturer (Section D): INTEGRA LIFESCIENCES CORPORATION OH/USA; 4900 charlemar drive; 4900 charlemar drive; cincinnati OH 45227
• Manufacturer (Section G): INTEGRA LIFESCIENCES CORPORATION OH/USA; 4900 charlemar drive; cincinnati OH 45227
• Manufacturer Contact: vivian nelson ; 1100 campus drive; princeton, NJ 08540 ; 6099362319
• MDR Report Key: 25553863
• Report Number: 3004608878-2026-00070
• Device Sequence Number: 5560432
• Product Code: HBL
• UDI-Device Identifier: 10381780253792
• UDI-Public: 10381780253792
• Combination Product (Y/N): N
• PMA/510(K) Number: K142238
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: User Facility,Company Representative
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 06/18/2026

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?: No
• Operator of Device: Health Professional
• Device Catalogue Number: A3059
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 06/03/2026
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 06/01/2026
• Initial Report FDA Received Date: 06/18/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 11/06/2023
• Is the Device Labeled for Single Use? (Y/N): No
• 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
• Outcome Attributed to Adverse Event: Other
• Patient Sex: Unknown