MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH PRIMARY TRITANIUM HEMI CLUSTER HOLE CUP 46MM; PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, POROUS UNCEMENTED

Catalog Number 502-03-46B

Device Problems Malposition of Device (2616); Osseointegration Problem (3003)

Patient Problems Congenital Defect/Deformity (1782); Injury (2348); Inadequate Osseointegration (2646)

Event Date 12/03/2018

Event Type  Injury  

Manufacturer Narrative

Review of the product history records indicate devices were manufactured and accepted into final stock with no relevant reported discrepancies.There have been no other events for the lot referenced.It was noted that the device is not available for evaluation.Should additional information become available, it will be provided in a supplemental report upon completion of the investigation.Device not returned.

Event Description

It was reported that the patient's right hip was revised.As reported by rep: "preoperative diagnosis: right failed total hip arthroplasty, complication of prosthetic hip implant¿[surgeon] commented no bony ingrowth to cup, only fibrous¿".A shell, screw, insert, and head were revised.

Manufacturer Narrative

Reported event: an event regarding loosening and malposition involving a trident shell was reported.The event was confirmed based on the clinician review of the medical records provided.Method & results: device evaluation and results: not performed as product was not returned however photographs were provided for review.A review of the photos by a clinician states: explant photographs during revision surgery confirm a trident shell with some fibrous tissue attached on the outside as evidence for the loosening.Medical records received and evaluation: a review of the provided medical records and/or x-rays by a clinical consultant indicated: conclusion of assessment acetabular component malposition with regard to a congenital dysplasia of the hip (cdh) deformity of the right hip has contributed to bony impingement between acetabulum and femoral stem causing an overload condition in the arthroplasty with excessive micromotion at the cup-bone interface leading to cup loosening thereby requiring revision surgery after 4-years.Suboptimal component choice for the type of problem adds further risk of failure.Does the review identify any procedural related factors that contributed to the event? acetabular component malposition with regard to a congenital hip dysplasia deformity suboptimal component choice for the type of cdh problem.Does the review identify any patient related factors that contributed to the event? cdh may be considered a secondary risk factor although there are adequate surgical solutions available for the problem, if recognised.Does the review identify any device related factors that caused or contributed to the adverse event? no device-related factors are associated with any of the implanted devices.Device history review: all devices were manufactured and accepted into final stock with no relevant reported discrepancies.Complaint history review: there have been no other similar events for the reported lot.Conclusions: the investigation concluded that the event was caused by acetabular component malposition with regard to a congenital hip dysplasia deformity.No further investigation is required at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.

Event Description

It was reported that the patient's right hip was revised.As reported by rep: "preoperative diagnosis: right failed total hip arthroplasty, complication of prosthetic hip "implant" [surgeon] commented no bony ingrowth to cup, only fibrous".A shell, screw, insert, and head were revised.

• Brand Name: PRIMARY TRITANIUM HEMI CLUSTER HOLE CUP 46MM
• Type of Device: PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, POROUS UNCEMENTED
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 8204499
• MDR Text Key: 131696016
• Report Number: 0002249697-2018-04179
• Device Sequence Number: 1
• Product Code: LPH
• UDI-Device Identifier: 07613327040104
• UDI-Public: 07613327040104
• Combination Product (y/n): N
• PMA/PMN Number: K143085
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional,other
• Type of Report: Initial,Followup
• Report Date: 03/27/2019

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
• Device Operator: Health Professional
• Device Expiration Date: 12/31/2019
• Device Catalogue Number: 502-03-46B
• Device Lot Number: 9W6JTV
• Was Device Available for Evaluation?: No
• Initial Date Manufacturer Received: 12/03/2018
• Initial Date FDA Received: 12/28/2018
• Supplement Dates Manufacturer Received: 02/27/2019
• Supplement Dates FDA Received: 03/27/2019
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Hospitalization; Required Intervention
• Patient Age: 45 YR
• Patient Weight: 58