Smiths Medical is issuing this letter to notify customers not to use Cardinal Health branded Monoject syringes with Medfusion 3500 and 4000 Syringe Pumps. On September 20, 2023, Cardinal Health issued a medical device product correction for the Cardinal Health branded Monoject Luer-Lock Tip Syringes due to demonstrated recognition and compatibility issues with syringe infusion pumps due to changes made to the dimensions of the syringes. As a result, Cardinal Health recommends that these syringes not be used on syringe infusion pumps. Recall Start Date: February 29, 2024