US Patent 11911588 Syringe

Described herein are syringe caps including a plug portion and a protruding member extending from one end of the plug portion. The protruding member can extend a length greater than a depth of an accumulated component in the syringe. Also described herein, are systems including a syringe containing a composition and a syringe cap. The syringe cap can include a luer-lock with a projecting member that projects into the syringe. The projecting member can assist in creating a tunnel through the accumulated material thereby allowing degassing of the composition. The projecting member can also help to prevent accumulation of a radiopaque visualization agent or contrast agent that may accumulate along one end of the syringe.