An epidural device comprising: an elongate body with a longitudinal axis; an inlet; an outlet being removably attachable to a needle having a passage therethrough; a sleeve slidably disposed about an outer surface of the body; a first chamber defined in the body, the first chamber being configured to receive a fluid; characterised in that the epidural device further comprises: a second chamber defined in the body, the second chamber being configured to convey the fluid to the outlet; a flow restrictor between the first and second chambers for providing fluid communication therebetween, wherein the flow restrictor has a smaller diameter than a diameter of the outlet; the first chamber having a first biasing mechanism positioned therein for pressurizing the first chamber; the second chamber having a piston provided therein, the piston being movable between: a primed position, where the piston is moved away from the flow restrictor, and the fluid can pass between first and second chambers; and a triggered position, where the piston covers the flow restrictor, and the fluid can exit the second chamber via the outlet; wherein: in the primed position, the sleeve is engageable by an extension of the piston to inhibit the sleeve from moving axially toward the outlet; and in the triggered position, the sleeve is not engageable by the extension of the piston and the sleeve is movable axially toward the outlet. an elongate body with a longitudinal axis; an inlet; an outlet being removably attachable to a needle having a passage therethrough; a sleeve slidably disposed about an outer surface of the body; a first chamber defined in the body, the first chamber being configured to receive a fluid; characterised in that the epidural device further comprises: a second chamber defined in the body, the second chamber being configured to convey the fluid to the outlet; a flow restrictor between the first and second chambers for providing fluid communication therebetween, wherein the flow restrictor has a smaller diameter than a diameter of the outlet; the first chamber having a first biasing mechanism positioned therein for pressurizing the first chamber; the second chamber having a piston provided therein, the piston being movable between: a primed position, where the piston is moved away from the flow restrictor, and the fluid can pass between first and second chambers; and a triggered position, where the piston covers the flow restrictor, and the fluid can exit the second chamber via the outlet; wherein: in the primed position, the sleeve is engageable by an extension of the piston to inhibit the sleeve from moving axially toward the outlet; and in the triggered position, the sleeve is not engageable by the extension of the piston and the sleeve is movable axially toward the outlet. a second chamber defined in the body, the second chamber being configured to convey the fluid to the outlet; a flow restrictor between the first and second chambers for providing fluid communication therebetween, wherein the flow restrictor has a smaller diameter than a diameter of the outlet; the first chamber having a first biasing mechanism positioned therein for pressurizing the first chamber; the second chamber having a piston provided therein, the piston being movable between: a primed position, where the piston is moved away from the flow restrictor, and the fluid can pass between first and second chambers; and a triggered position, where the piston covers the flow restrictor, and the fluid can exit the second chamber via the outlet; a primed position, where the piston is moved away from the flow restrictor, and the fluid can pass between first and second chambers; and a triggered position, where the piston covers the flow restrictor, and the fluid can exit the second chamber via the outlet; wherein: in the primed position, the sleeve is engageable by an extension of the piston to inhibit the sleeve from moving axially toward the outlet; and in the triggered position, the sleeve is not engageable by the extension of the piston and the sleeve is movable axially toward the outlet. in the primed position, the sleeve is engageable by an extension of the piston to inhibit the sleeve from moving axially toward the outlet; and in the triggered position, the sleeve is not engageable by the extension of the piston and the sleeve is movable axially toward the outlet.