Medical devices, namely, medical connectors, intravenous connectors, vascular access connectors, arterial connectors, dialysis connectors, vial access connectors and fluid bag access connectors, and component parts thereof; Medical devices, namely, valves, intravenous infusion valves, check valves, back check valves, stopcocks, enteral valves, anti-siphon valves, y-sites, pump cassettes, fluid conduits, catheters, clamps, burettes, burrette chambers for use with medical devices, medical tubing for the transfer of fluids, medical tubing caps, caps for medical connectors, medical filters, intravenous (IV) bag spikes, drip chambers for use with infusion sets, luers, luer slips, luer locks, luer caps, medical connectors, needleless connectors for the transfer of fluids, adapters for the exchange of fluids and gases, syringes, surgical equipment in the nature of roller clamps, male spin locks, manifolds for the infusion of fluids, and intravenous (IV) start and dressing change kits comprised of combinations of the above elements, administration sets comprised of combinations of the above elements, and extension sets comprised of combinations of the above elements; Medical devices, namely, protective shields or covers for medical connectors, intravenous connectors, vascular access connectors, arterial connectors, dialysis connectors, vial access connectors, fluid bag access connectors and catheters; Medical devices, namely, diabetes infusion sets, insulin injection sets sold empty, protective covers for preventing accidental needle sticks, vial access devices and devices for accessing containers for medical fluids, spikes for accessing fluid containers and fluid conduits, contrast counters, gastric lavage system and component parts thereof, and locking cannula housing