The primary surgery was performed on an unknown date via tha.It was reported that the revision surgery was performed on (b)(6) 2020 due to armd.The armd was caused by trunnions at the point of head neck junction.The surgeon planned to remove all implants and to replace them as preoperative planning, however, during the surgery, the surgeon could not remove the stem.The stem was pulled about 8mm but was not pulled any more.The surgeon tried to remove the stem about 1 hour, and he abandoned to remove the stem.The stem was remained in the body.It was inferred that the difficulty in removing the stem was caused by bone¿s penetration into the slot of distal stem.The surgeon replaced the liner, the head and the hole-eliminator.The inside of explanted head was blackening.The black ring was seemed at the neck.The surgeon replaced the head with a delta head.The pseudotumor was occurred due to armd.The difficulty removing the stem caused extension of surgical duration and increase of bleeding.The surgery was completed with over 30 minutes delay.There was suspicion of infection, the surgeon might perform another surgery again depending on pathology exam of tissue inside the joint.No further information is available.
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Product complaint # (b)(4).Investigation summary: no device associated with this report was received for examination.Review of the attached photographs could not confirm the reported allegations.The root cause could not be determined.The information received will be retained for potential series investigations if triggered by trend analysis, post market surveillance, or other events within the quality system.Depuy considers the investigation closed.Should additional information be received, the information will be reviewed, and the investigation will be re-opened as necessary.
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