Single use caps and covers for vascular access devices, and kits and methods for using the same

A vascular access assembly, comprising:

• a. a needlefree connector that comprises a vascular access port that comprises a valve region that comprises a valve surface, exterior threads, and a collar disposed below the exterior threads;
• and
• b. a single use cap removably attached to the valve region of the vascular access port, the cap being configured to (i) be snap fit to the collar of the valve region without threading onto the exterior threads and (ii) be destroyed upon removal so as to prevent reuse of the cap, the cap comprising:
• i. a cap body comprised of a plastic, wherein the cap body comprises a sidewall integrated with a closed end wall, wherein the sidewall and the closed end wall form a cavity, wherein the sidewall and the closed end wall are configured to cover the valve surface, the exterior threads, and the collar of the valve region of the vascular access port upon snap fitting the cap to the collar;
• ii. an opening defined by a first edge of the sidewall and opposite the closed end wall, wherein the opening is sized to allow the cap to be placed over the valve region such that at least the valve surface, the exterior threads, and the collar of the valve region are disposed inside the cavity when the cap is removably attached via the snap fit to the valve region;
• iii. a circumferential channel formed into an interior surface of the sidewall of the cap, wherein the channel is configured to matingly snap fit to the collar on the valve region so as to allow the cap to be retained on the vascular access port;
• iv. at least one separating region in the cap body configured to allow the sidewall to be separated so as to allow the cap to be removed from the valve region of the vascular access port to which the cap has been attached and to prevent functional reattachment of the cap to the same valve region or a valve region of a vascular access port of a different needlefree connector;
• and
• v. a pull tab connected to a portion of the sidewall proximate to the first edge of the sidewall and the at least one separating region, wherein the pull tab is configured for grasping by a user, and when pulled, to cause the sidewall to separate in at least a portion of the at least one separating region so as to allow the user to then remove the cap from the valve region of the vascular access port to which the cap is removably attached.