MAUDE Adverse Event Report: ZIMMER SWITZERLAND MANUFACTURING GMBH WAGNER SL REVISION, SCREW FOR TRIAL STEM, L 190

Model Number N/A

Device Problem Fracture (1260)

Patient Problems Foreign Body In Patient (2687); Limb Fracture (4518)

Event Date 01/11/2021

Event Type  Injury  

Manufacturer Narrative

The manufacturer did receive per and images for review.As no lot number was provided, the device history records could not be reviewed.A cause for this specific event cannot be ascertained from the information provided.As soon as supplemental information becomes available an updated report will be submitted.(b)(4).

Event Description

During revision surgery, the distal trial fractured and the distal portion of the stem was stuck in the femur.The surgery was delayed by an hour.The implantation and explantation dates are left empty as the device involved in this complaint is an instrument.Hence, no expiration date is captured, for the same reason.

Event Description

No change to previously reported event.

Manufacturer Narrative

This follow-up report is being submitted to relay corrected and additional information.Event description: it was reported that during revision surgery on (b)(6) 2021, the screw connecting the proximal and distal wagner trial stems fractured while the trial stems were in the patient.The broken off screw end remained in the distal trial stem.Due to the remaining fracture part, the distal wagner trial stem could no longer be retrieved from the femoral canal.After multiple unsuccessful removal attempts an extended trochanteric osteotomy was performed to retrieve the trial stem.These intraoperative complications led a surgical delay of around one hour.Review of received data: due diligence: no further due diligence required as all required information to support the conclusion is available or was already requested.Images: two undated images have been received from the operating room.One image shows three wagner trial components consisting of a proximal (225) trial stem with a screw in it, a distal wagner trial stem and a broken off screw head.Additionally, it was reported by the sales representative that the broken screw was not used with the 225 distal trial stem.The second image shows the drill hole of the distal trial stem which appears asymmetric.Patient data: (b)(6), male.Product evaluation: visual examination: the distal wagner trial stem and the broken off screw head have been received.There are severe deformations, indentations and scratch marks on the outer surface of the distal trial stem.In addition, some flanks were deformed or torn off.The proximal surface with the bore hole also has indentations and deformations.The bore hole is asymmetrical and only a small portion of the original thread structure is still visible.The rest of the thread was filled with the broken off screw and has a smooth surface structure with some drill marks.On the received screw head, the size mark 190 is visible.The screw has broken off just above the distal thread, which remained in the distal trial stem.The lot number was inscribed on the missing screw part and is therefore no longer present.The fracture surface of the screw head indicates a forced fracture.Review of product documentation: device purpose: this device is intended for treatment.Product compatibility: the compatibility check could not be performed, even though it was reported that the 190 screw has not been used with the 225 proximal trial stem, a mismatch cannot be completely excluded.Conclusion: it was reported that during revision surgery on (b)(6) 2021, the screw connecting the proximal and distal wagner trial stems fractured while the trial components were in the patient.The broken off screw end remained in the distal trial stem.Due to the remaining fracture part, the distal wagner trial stem could no longer be retrieved from the femoral canal.After multiple unsuccessful removal attempts an extended trochanteric osteotomy was performed to retrieve the trial stem.These intraoperative complications led a surgical delay of around one hour.The asymmetry and the smooth surface characteristics of the bore hole of the distal trial stem indicate that it was drilled into the bore hole and the remaining screw part, which was thereby pushed to the side and into the thread.This most likely occurred during one of the removal attempts of the distal trial stem.Therefore, the original thread surface can no longer be examined.The characteristics of the fracture surface of the received screw head indicate a forced fracture.Possible causes of screw fracture include, but are not limited to, fracture due to introduction of defects due to wear from repeated use, cleaning and sterilization, cold welding, wrong combination of the trial screw and the proximal wagner trial stem, and jamming of the thread due to tissue remnants.Based on the visual examination and since the received distal trial stem was manufactured in 2007, the most likely cause is wear of the screw and the thread of the distal trial stem leading to fracture.Nevertheless, since the original thread structure is no longer visible, an exact cause could not be identified.Based on the available manufacturing records and the given information, the investigation did not identify a nonconformance or a complaint out of box (coob).The need for corrective measures is not indicated and zimmer gmbh considers this case as closed.Zimmer biomet¿s reference number of this file is (b)(4).

• Brand Name: WAGNER SL REVISION, SCREW FOR TRIAL STEM, L 190
• Type of Device: WAGNER SL REVISION, SCREW FOR TRIAL STEM, L 190
• Manufacturer (Section D): ZIMMER SWITZERLAND MANUFACTURING GMBH; sulzer allee 8; sulzer industrie park; winterthur 8404 ; SZ 8404
• MDR Report Key: 11242714
• MDR Text Key: 229084191
• Report Number: 0009613350-2021-00037
• Device Sequence Number: 1
• Product Code: LXH
• UDI-Device Identifier: 00889024278004
• UDI-Public: 00889024278004
• Combination Product (y/n): N
• PMA/PMN Number: N/A
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional
• Type of Report: Initial,Followup
• Report Date: 04/15/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 01/28/2021
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: N/A
• Device Catalogue Number: 01.00109.809
• Device Lot Number: UNKNOWN
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 01/19/2021
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 04/14/2021
• Is This a Reprocessed and Reused Single-Use Device?: No
• Removal/Correction Number: N/A
• Patient Sequence Number: 1
• Patient Outcome(s): Hospitalization