No lot number was provided; therefore, device history record review could not be completed.A product sample was received for evaluation.Visual and functional testing were performed.As a result of the investigation, it was confirmed that the retention edge of the collar attachment part was crushed and flattened.It is possible that the crushing of the retention edge caused this event, but there is also the possibility of crushing when the collar comes off, the time of occurrence could not be identified, and the root cause of occurrence could not be identified.Udi is unknown.No product information has been provided to date.This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).
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