MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIDENT HEMISPHERICAL CLUSTER HOLE SHELL; PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, POROUS UNCEMENTED

Model Number	502-11-56F
Medical Device Problem Code	Device Dislodged or Dislocated (2923)
Health Effect - Clinical Codes	Inflammation (1932); Injury (2348); Joint Dislocation (2374); Reaction (2414)
Date of Event	03/18/2020
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Review of the device history records indicate that devices were manufactured and accepted into final stock with no reported discrepancies.There have been no other events for the lot referenced.If additional information is received, it will be provided in a supplemental report upon completion of the investigation.Device not returned.
Event or Problem Description
Patient presented with dislocated left total hip replacement (exeter, trident with mdm) following fall down stairs.Hip could not be reduced as a closed reduction.When hip joint was opened, surrounding tissues was a grey/black colour consistent with metalosis.28mm lfit head had disassociated from mdm head.When mdm liner was removed a small metal fragment was present in the joint.This fragment had numbers on it consistent with the lot number for implanted trident hemispherical shell.Trident shell was explanted which revealed where metal fragment had come from.Acetabulum was reamed.A tritanium multihole cup was implanted with mdm liner and head.
Additional Manufacturer Narrative
Corrected data - d4 541956c1 to 54195601.Additional manufacturer narrative- reported event: an event regarding crack/fracture involving a trident shell was reported.The event was confirmed by inspection of the received images.Method & results: -device evaluation and results: the device was not returned.Visual inspection of the received image of the explant noted that shell was covered with blood.The shell is observed to be fractured at the rim, a metal strip with numbers etched on it is also observed.Dimensional, functional and material analysis could not be performed as the device was not returned.- clinician review: the available medical records were provided to the consulting clinician for a review which noted that, " the undated x-rays showed pelvis/lateral hip with a stable hybrid hip and screws, an ap hip showing the same hip dislocated but the adm/mdm ball not clearly visualized.It could be attached to the 28 mm lfit ball or retained in the shell or dislodged.The pi report states that it was disassociated.The undated photos showed a shard of metal etched with #.95602 and the rim of multihole cup explant that is missing a piece of its metal rim etched with #54.The pi report notes that the lot numbers match.Adverse event identified traumatic irreducible hip dislocation, fracture of the trident shell liner and metallosis leading to revision surgery.Hazards: fracture of the trident acetabular rim, mdm/head dissociation, revision tha conclusion of assessment: review of the records confirm an irreducible exeter-mdm hip dislocation.Review of the records confirm fracture of the rim of a trident acetabular shell.Review of implant stickers could define if this was a recalled head lot.Obtaining the implant may provide additional insight into the mechanism dislocation, etiology of the rim fracture and etiology of the metallosis." -device history review: review of the product history records indicate all devices were manufactured and accepted into final stock with no reported relevant discrepancies.-complaint history review: there have been no other events for the lot referenced.Conclusions: the patient had presented with a dislocated total hip following a fall down stairs.During the revision the shell appeared to be fractured.The available medical records were provided to the consulting clinician for a review which concluded that the undated x-rays showed pelvis/lateral hip with a stable hybrid hip and screws, an ap hip showing the same hip dislocated but the adm/mdm ball not clearly visualized.It could be attached to the 28 mm lfit ball or retained in the shell or dislodged.The pi report states that it was disassociated.The undated photos showed a shard of metal etched with #.95602 and the rim of multihole cup explant that is missing a piece of its metal rim etched with #54.The pi report notes that the lot numbers match.Review of the records confirm an irreducible exeter-mdm hip dislocation.Review of the records confirm fracture of the rim of a trident acetabular shell.Review of implant stickers could define if this was a recalled head lot.The root cause can not be determined as insufficient information was provided.No further investigation for this event is possible at this time.If additional information become available, this investigation will be reopened.Product surveillance will continue to monitor for trends.
Event or Problem Description
Patient presented with dislocated left total hip replacement (exeter, trident with mdm) following fall down stairs.Hip could not be reduced as a closed reduction.When hip joint was opened, surrounding tissues was a grey/black colour consistent with metalosis.28mm lfit head had disassociated from mdm head.When mdm liner was removed a small metal fragment was present in the joint.This fragment had numbers on it consistent with the lot number for implanted trident hemispherical shell.Trident shell was explanted which revealed where metal fragment had come from.Acetabulum was reamed.A tritanium multihole cup was implanted with mdm liner and head.

• Brand Name: TRIDENT HEMISPHERICAL CLUSTER HOLE SHELL
• Common Device Name: PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, POROUS UNCEMENTED
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 9964295
• Report Number: 0002249697-2020-00752
• Device Sequence Number: 2857674
• Product Code: LPH
• UDI-Device Identifier: 04546540432056
• UDI-Public: 04546540432056
• Combination Product (Y/N): N
• Initial Reporter Country: AU
• PMA/510(K) Number: K143085
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2016
• Device Explanted Year: 2020
• Reporter Type: Manufacturer
• Report Source: health professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 06/22/2020

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?: No
• Operator of Device: Health Professional
• Device Expiration Date: 01/31/2021
• Device Model Number: 502-11-56F
• Device Catalogue Number: 502-11-56F
• Device Lot Number: 54195601
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 03/18/2020
• Supplement Date Received by Manufacturer: 05/26/2020
• Initial Report FDA Received Date: 04/15/2020
• Supplement Report FDA Received Date: 06/22/2020
• 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: Hospitalization; Required Intervention
• Patient Age: 60 YR
• Patient Weight: 82