MAUDE Adverse Event Report: STRYKER LEIBINGER FREIBURG UNKNOWN_FRO_PRODUCT; IMPLANT

Catalog Number UNK_FRO

Device Problem Contamination (1120)

Patient Problem Unspecified Infection (1930)

Event Date 05/25/2017

Event Type  Injury  

Manufacturer Narrative

Device is not available for evaluation.If additional information is received it will be reported on a supplemental report.Device was discarded at the user facility.

Event Description

It has been reported by the customer that the patient had an infection postoperatively.Potentialy, due the infection the surgeon may have to explant the plate and screws.

Manufacturer Narrative

The reported event could not be confirmed, because the complained devices were not returned for investigation and not enough information was provided.For this specific event no lot numbers were provided and a review of the associated manufacturing batch record and related quality documents (manufacturing documents, inspection plan, inspection drawing and release report) can not be performed.Therefore it is also not possible to determine the total quantity released for distribution within the affected lots.For the 7 infection complaints that were raised in total from the same customer, lot numbers were reported for 3 plates.The dhrs for those plates were checked and it was determined that the products were manufactured to specification and accepted into final stock without any reported discrepancies.To gain a detailed insight in the event and the conditions the product had been exposed to, a telephone conference was organized with the customer.Furthermore the customer completed the checklist ¿infection complaints ¿ checklist customer¿ (cmfqf 13-003) and provided detailed information about his applied surgical technique and his sterilization method.Within the ¿infection complaints ¿ checklist customer¿ it was stated that no anomalies regarding the undamaged status of the sterile packaging and / or the sterility of the product have been observed.Furthermore it was indicated that an intraoral approach was performed.Infections in combination with other stryker instruments and implants occur rarely at the customer site.A lack of implant torque was proposed by the customer as the most probable root cause for the occurred infection.Another possible complaint root cause discussed during the call with the surgeon was the applied sterilization technique.As part of the provided information about the applied surgical technique it was stated that 6 screws were placed in combination with one plate and for 1 ¿ 2 screws the insertion torque was not sufficient.The exact article number and lot number of each screw was not provided by the customer.It seems very unlikely that a wrong screw / drill combination is the reason for the lack of insertion torque, because only 1-2 out of 6 implanted screws were affected by the failure mode.Also the screw loading technique does not seem to have contributed to the lack of torque, because only low pressure was required and the pick-up was performed with the standard straight blade 62- 20130 and not with the angulated screw driver, which requires a slightly different pick-up technique.During drilling an rpm of 40.000 max.Was applied with the stryker core motor unit, while the corresponding instructions for use recommend an rpm of 1000 max.After a discussion with the stryker r&d department a concern was raised that if the drill speed is too high, the diameter of the generated drill hole will be too large due to an unbalance of the drill.As a result of the larger drill hole the implant insertion torque is decreased.The stryker global medical director assessed the provided x-ray images and confirmed that the generated drill holes do not match with the applied screw (see fig.1-3 of the image documentation).As part of the information about the sterilization technique it was observed that the customer does not follow the validated stryker sterilization proposal, but does apply different parameters for sterilization.Especially the drying time for one specific autoclave (autoclave 2 / sc501 e-2) inside the clinic is with 10 minutes significantly below the 35 mins.Recommended by the stryker ifu.According to the corresponding ifu it ¿is the responsibility of the user facility to make sure that appropriate sterilization methods are used where stryker recommendations are not followed to account for potential differences in sterilization chambers, wrapping methods and load configurations¿.Finally the ¿infection complaints ¿ checklist investigator¿ (cmfqf 13-002) has been completed for the affected product: for infection complaints expanded investigations are performed to assure that neither the complained device nor all related manufacturing process steps could have caused the event.Sterilization validations do exist and cover the affected, unsterile product.The sterilization parameters within the ifu match with the validated parameters from the test reports.The routine monitoring of organic and anorganic residues as well as the routine monitoring of bioburden, endotoxine and cytotoxicity was checked and the results of all performed tests are conform to specification.Additionally the process fmea (pfmea) was checked, possible root causes were identified and evaluated.Indications for any device or manufacturing related problem were not found.Based on the provided information about the surgical technique and the sterilization method, as well as based on the assessment of the stryker global medical director the root cause for this complaint is most likely user-related.There is no indication for a not correctly working product or any systematic design, material or manufacturing related issue.Therefore no corrective and/or preventive actions are deemed necessary at that time.The complaint is added to the complaint trend.

Event Description

It has been reported by the customer that the patient had an infection postoperatively.Potentialy, due the infection the surgeon may have to explant the plate and screws.

• Brand Name: UNKNOWN_FRO_PRODUCT
• Type of Device: IMPLANT
• Manufacturer (Section D): STRYKER LEIBINGER FREIBURG; boetzingerstr. 41; freiburg D-791 11
• MDR Report Key: 7647875
• MDR Text Key: 112700611
• Report Number: 0008010177-2018-00066
• Device Sequence Number: 1
• Product Code: JEY
• UDI-Device Identifier: 04546540366245
• UDI-Public: 04546540366245
• Combination Product (y/n): N
• PMA/PMN Number: K022185
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: consumer
• Type of Report: Initial,Followup
• Report Date: 03/28/2019

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 06/28/2018
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Catalogue Number: UNK_FRO
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 05/30/2018
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1