It was reported that the thumb ring of the control syringe broke off.To date, no information has been received to indicate that a user or a patient experienced a death, serious injury, medical intervention, follow-up care, or other adverse health impact associated with the reported problem/issue.A sample was returned for evaluation and it was confirmed that the thumb ring had broken off of the syringe plunger.Visual inspection noted that the thumb ring broke due to a shear force being applied rather than an axial force.There was no indication of a short shot and the plunger was able to rotate within the barrel and slide axially with low resistance, indicating that no excessive force was required to operate the syringe.The root cause for the reported problem/issue was determined was determined to be customer misuse as a shear force was applied rather than an axial force.In an abundance of caution, and in response to an fda 483 issued for cfn 1417592 on 22-jan-2024, this medwatch is being filed.If additional relevant information becomes available a supplemental medwatch will be filed.
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