MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH LFIT MORSE TAPER HEAD; PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, UNCEMENTED

Model Number 01-2200

Device Problem Device Dislodged or Dislocated (2923)

Patient Problems Injury (2348); Joint Dislocation (2374); Blood Loss (2597)

Event Date 05/21/2020

Event Type  Injury  

Manufacturer Narrative

It was noted that the device is not available for evaluation.If additional information is received, it will be provided in a supplemental report upon completion of the investigation.

Event Description

On (b)(6) 1998 the female patient was initially inserted tha cup, which was revised on (b)(6) 2020.It was planned to replace from the liner of 22 mm diameter to the liner of 32 mm diameter after removing the neck.But the neck could not be removed, and it remained as it was, and closed at that time.After that, she began to dislocate more frequently, and on (b)(6) 2020, the stem side was also prepared in consideration of the possibility that the neck won¿t be come out.The condition of the femur bone was also good, and the surgeon wanted to remove the neck as much as possible and only replace the neck and liner because the stem is firmly fixed.But despite the fact that the surgeon was carefully preparing for the removal of the neck, after all, the femur could not be pulled out, and the femur was vertically split and the stem was removed, and a new stem, neck 32 mm, and liner were replaced.Initially, it was planned to be less than 1-hour op if the neck got out, but finally it took 5 hours.The surgeon requested to investigate the reason; why he could not remove the product.He had never experienced a case where the neck could not come out so difficult and took so long.Originally, the surgery was planning to remove the neck, replace it with a larger diameter head, and change the liner to match it, but it could not remove it.So, the surgeon had to remove the stem, and op time and bleeding volume increased.

Event Description

On (b)(6) 1998 the female patient was initially inserted tha cup, which was revised on (b)(6) 2020.It was planned to replace from the liner of 22 mm diameter to the liner of 32 mm diameter after removing the neck.But the neck could not be removed, and it remained as it was, and closed at that time.After that, she began to dislocate more frequently, and on (b)(6) 2020, the stem side was also prepared in consideration of the possibility that the neck will not be come out.The condition of the femur bone was also good, and the surgeon wanted to remove the neck as much as possible and only replace the neck and liner because the stem is firmly fixed.But despite the fact that the surgeon was carefully preparing for the removal of the neck, after all, the femur could not be pulled out, and the femur was vertically split and the stem was removed, and a new stem, neck 32 mm, and liner were replaced.Initially, it was planned to be less than 1-hour op if the neck got out, but finally it took 5 hours.The surgeon requested to investigate the reason; why he could not remove the product.He had never experienced a case where the neck could not come out so difficult and took so long.Originally, the surgery was planning to remove the neck, replace it with a larger diameter head, and change the liner to match it, but it could not remove it.So, the surgeon had to remove the stem, and op time and bleeding volume increased.

Manufacturer Narrative

Reported event: an event regarding dislocation & disassembly issue is reported involving metal head.The event was confirmed for disassembly issue only via images.Method & results: product evaluation and results: visual inspection - visual inspection of images performed and stated that scratches can be observed on the surface of explanted device.Ma - material analysis is not performed as dislocation is not related to material integrity issue.Functional and dimensional inspection not performed as device was received in damage condition.Clinician review: no medical records were received for review with a clinical consultant.Product 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 event was reported about dislocation involving metal head, it was also reported that there was surgical delay because surgeon experienced that the femoral head didn't come out through stem.The event was confirmed for disassembly issue.The exact cause of the event could not be determined because lack of information further information such as pre- and post-operative x-rays and the primary operative report as well as patient history and follow-up notes are needed to complete the investigation for determining root cause.No further investigation for this event is possible at this time as insufficient information was received by stryker orthopaedics.If additional information become available to indicate further evaluation is warranted, this record will be reopened.

• Brand Name: LFIT MORSE TAPER HEAD
• Type of Device: PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/POLYMER, UNCEMENTED
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 10170740
• MDR Text Key: 195909704
• Report Number: 0002249697-2020-01232
• Device Sequence Number: 1
• Product Code: LWJ
• UDI-Device Identifier: 07613327016086
• UDI-Public: 07613327016086
• Combination Product (y/n): N
• PMA/PMN Number: K993601
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional
• Type of Report: Initial,Followup
• Report Date: 12/08/2020

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 06/18/2020
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Expiration Date: 12/31/2002
• Device Model Number: 01-2200
• Device Catalogue Number: 01-2200
• Device Lot Number: 30596303
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 11/11/2020
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Hospitalization; Required Intervention