Batch review performed on 28 september 2021: lot 164553: (b)(4) items manufactured and released on 8-11-2016.Expiration date: 2021-10-17 no anomalies were found related to the problem.To date, (b)(4) items of the same lot have been sold without similar reported event since 2017.Visual inspection performed by r&d manager: looking at the images it is visible the explanted stem was covered with patient blood.It is not easy to identify if the ha coating has been absorbed completely by patient bone, even if it seems so.Some signs and scratches are present on the stem neck due to revision surgery.More details will be added during visual inspection if the stem will be available.The root cause remains unknown.
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