MAUDE Adverse Event Report: STRYKER SPINE-US FIXED ANGLE BONE SCREW DIAM 4.0 X 14MM; APPLIANCE, FIXATION, SPINAL INTERVERTEBRAL BODY

Model Number	48674014
Medical Device Problem Code	Migration (4003)
Health Effect - Clinical Codes	Injury (2348); No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/01/2020
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Status and location of the device is currently unknown.
Event or Problem Description
A physician reported that the securing mechanism of a reflex hybrid two-level plate failed and two reflex hybrid fixed angle bone screws placed at c7 backed-out; the order of events is not known at this time.The patient has been revised.This report represents one of the two screws.
Event or Problem Description
A physician reported that the securing mechanism of a reflex hybrid two-level plate failed and two reflex hybrid fixed angle bone screws placed at c7 backed-out; the order of events is not known at this time.The patient has been revised.This report represents one of the two screws.
Additional Manufacturer Narrative
Dimensional, functional and material analysis could not be performed as the device was not returned.However, pictures of the devices were shared.The construct spanned from c5 to c7.It was reported that c6 vertebra was sub totally removed, and iliac bone was transplanted.The 2 level plate was supported with 5 screws.No screw was placed in left screw hole at the center.Top and bottom sides of the plate are unknown, however, sales rep indicated the probable side of the plate that was likely implanted at c7.Both locking rings at c7 look intact in the pictures.The right locking ring at the center is damaged and there are wear marks on the plate.These may have occurred during removal of the screws.Wear marks are visible on 3 fixed angle screws.It is unknown which 2 of the 3 fixed angle screw backed out from c7.Wear marks may have been a result of implantation and/ or explantation of the screws.Very slight marks are visible on the 2 variable angle screws.Both variable angle screws and 1 of the 3 fixed angle screws are concomitant as no issue was reported with these screws.Device and complaint history records were reviewed and no relevant manufacturing issues or similar complaints were identified.An exact root cause of the reported event could not be determined.Potential causes from the risk table include- - fatigue of construct prior to or beyond the expected life may result in screw back out - drill guide/aiog was not used to correct screw trajectory - user error.Inadequate plate bending/notching, resulting in screw hole plate deformation - user error, locking ring was damaged on screw installation, not noticed or ignored - user error, inadequate screw hole preparation/hard bone, resulting in high screw purchase - locking ring closing over the bone screw head was not verified - user error, final tightening screwdriver was not used to prevent stripping - poor bone quality, patient pathology (i.E smoker, diabetic) - too much instantaneous loading/fatigue on construct resulting in screw backing out.

• Brand Name: FIXED ANGLE BONE SCREW DIAM 4.0 X 14MM
• Common Device Name: APPLIANCE, FIXATION, SPINAL INTERVERTEBRAL BODY
• Manufacturer (Section D): STRYKER SPINE-US; 2 pearl court; allendale NJ 07401
• MDR Report Key: 10367187
• Report Number: 0009617544-2020-00129
• Device Sequence Number: 2888372
• Product Code: KWQ
• UDI-Device Identifier: 04546540392954
• UDI-Public: 04546540392954
• Combination Product (Y/N): N
• PMA/510(K) Number: K040261
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: health professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 10/27/2020

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: 48674014
• Device Catalogue Number: 48674014
• Device Lot Number: ZPW
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 07/07/2020
• Supplement Date Received by Manufacturer: 09/29/2020
• Initial Report FDA Received Date: 08/05/2020
• Supplement Report FDA Received Date: 10/27/2020
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention