MAUDE Adverse Event Report: STRYKER SPINE-US XIA LP POLYAXIAL SCREW 6.5 X 40MM; THORACOLUMBOSACRAL PEDICLE SCREW SYSTEM22

Catalog Number 03821640

Device Problems Break (1069); Crack (1135); Fracture (1260)

Patient Problem Pain (1994)

Event Date 03/01/2018

Event Type  malfunction  

Event Description

It was reported that the patient notified the surgeon of sudden onset of axial back pain.Surgeon took x-rays, and noticed screws at sr1 were broken and the cage looked cracked.Revision surgery has not been planned.

Event Description

It was reported that the patient notified the surgeon of sudden onset of axial back pain.Surgeon took x-rays, and noticed screws at sr1 were broken and the cage looked cracked.Revision surgery has not been planned.

Manufacturer Narrative

Method: risk assessment.Result: the customer reported event was confirmed via x ray review.The x rays show both screws fractured at the screw shank.As the device is still implanted, inspection and material analysis could not be performed.The lot number is unknown, so a manufacturing record review could not be completed.The screws were implanted for about 6 months.According to the xia ifu, "the surgeon must discuss all physical and psychological limitations inherent to the use of these devices with the patient.This includes the rehabilitation regimen, physical therapy, and wearing an appropriate orthosis as prescribed by the physician.Particular discussion should be directed to the issues of premature weight bearing, activity levels, and the necessity for periodic medical follow-up.The surgeon must warn the patient of the surgical risks and make aware of possible adverse effects.The surgeon must warn the patient that the devices cannot and do not replicate the flexibility, strength, reliability or durability of normal healthy bone, that the implants can break or become damaged as a result of strenuous activity or trauma, and that the devices may need to be replaced in the future.If the patient is involved in an occupation or activity which applies inordinate stress upon the implant (e.G., substantial walking, running, lifting, or muscle strain) the surgeon must advise the patient that resultant forces can cause failure of the devices.Patients who smoke have been shown to have an increased incidence of non-unions.Surgeons must advise patients of this fact and warn of the potential consequences.Conclusion: as the device was not returned, a definite root cause cannot be determined.Possible root causes as defined in the risk table include excessive patient post op activity, patient non fusion, poor bone quality, surgeon applying too much torque to the blockers, poor fixation construct, improper screw hole prep, and improper screw insertion.

• Brand Name: XIA LP POLYAXIAL SCREW 6.5 X 40MM
• Type of Device: THORACOLUMBOSACRAL PEDICLE SCREW SYSTEM22
• Manufacturer (Section D): STRYKER SPINE-US; 2 pearl court; -; allendale NJ 07401
• MDR Report Key: 7390573
• MDR Text Key: 104278554
• Report Number: 3005525032-2018-00019
• Device Sequence Number: 1
• Product Code: NKB
• Combination Product (y/n): N
• PMA/PMN Number: K060361
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional
• Type of Report: Initial,Followup
• Report Date: 08/20/2018

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 04/02/2018
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Catalogue Number: 03821640
• Device Lot Number: UNKNOWN
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 07/30/2018
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Age: 44 YR
• Patient Weight: 185