Intravenous cannula

An intravenous cannula, comprising:

• a catheter hub having a proximal end, a distal end and a first chamber;
• an actuator member disposed within the first chamber and having an axial bore, the actuator member configured to be axially displaced towards the distal end of the catheter hub to form a passage for fluid flow from the proximal end of the catheter hub to the distal end of the catheter hub, when a luer lock member removably connected to the proximal end of the catheter hub displaces the actuator member;
• a tubular valve member disposed within the first chamber and adapted to allow a needle member to pass through, the tubular valve member defined with a flat portion at a first end, the flat portion configured with one or more slits defining a plurality of prongs, the slits configured to allow the needle member to pass through for puncturing a vein of a subject,
• wherein the prongs are displaced by the actuator member for fluid flow from the proximal end of the catheter hub to the distal end of the catheter hub, when the luer lock member displaces the actuator member;
• a valve closure member comprising a first surface at a proximal end, a second surface at a distal end and a through-hole, the valve closure member disposed in the catheter hub such that the first surface abuts an undercut portion defined in the catheter hub and the second surface abuts the flat portion of the tubular valve member,
• wherein the valve closure member is adapted to displace the prongs to close the passage for fluid flow and preventing blood flow from the punctured vein of the subject from the distal end of the catheter hub to the proximal end of the catheter hub, when the luer lock member abutting the actuator member is removed;
• and
• a needle guard assembly, comprising:
• a body portion connected to the proximal end of the catheter hub,
• a safety clip biasing outwardly to lock onto at least one interlocking flange defined in the body portion, the safety clip in a biased position allowing the needle member to extend through the body portion and the catheter hub,
• wherein upon withdrawal of the needle member from the proximal end of the catheter hub, the safety pin disengages from the at least one interlocking flange and arrests a tip portion of the needle member within the safety clip, thereby preventing needle prick injury during withdrawal of the needle member from the catheter hub.