Abstract: Intravenous cannula devices configured to prevent blood backflow and needle prick injuries include a catheter assembly and a needle guard assembly. The catheter assembly includes a hub having a coaxial recess and a valve member positioned therein. The valve member is cylindrical and includes a distal surface having slits collectively defining prongs configured to open and close upon passage of a needle therethrough. Cannula devices configured to prevent needle stick injuries include a safety release component at a distal end of the needle guard assembly. The safety release component includes moveable locking elements configured to fit within an annular groove defined by a proximal portion of the hub upon movement of a needle through the safety release component. Proximal retraction of the needle through the safety release component causes the moveable locking elements to be displaced from the annular groove, thereby decoupling the catheter assembly from the needle guard assembly.

Abstract: A handle mounted light hub for a laryngoscope, the light hub comprising a depressible switch, a light source, and an electrical contact, wherein the switch moves the electrical contact into contact with a power source causing current to flow to power the light source and wherein when depressed, the switch exposes the illuminated light source.

Abstract: The intravenous catheter device (100) includes a catheter hub (102), a valve member (158), an actuator member (176) and a valve closure member (192). The valve member (158) includes a convex portion (162) provided with slits (170) defining prongs (172). The slits (170) are configured to open when a needle (116) is pierced through the slit (170) to puncture a vein of a patient. The valve closure member (192) is disposed inside the catheter hub (102) such that the first surface (194) of the valve closure member (192) abuts the convex portion (162) of the valve member (158). When the luer lock member (206) abutting the actuator member (176) inside the catheter hub (102) is disengaged, the valve closure member (192) is adapted to push the prongs (172), closing the passage (204) for the fluid flow and preventing blood flow from the punctured vein of the patient.

Abstract: A laryngoscope assembly having a handle for connection with a laryngoscope blade and wherein the handle includes an additional mechanism for securing the blade to the handle. A locking mechanism is a spring provided for holding the blade in position on the handle and preventing side to side movement of the blade with respect to the handle.