A needle inserter, comprising: a needle having a sharpened end and an opposing end, the needle being insertable through a base; and a needle shield device, comprising: an inner shield; and an outer shield fixedly connected to the opposing end of the needle and displaceable relative to the inner shield between a first position, in which the sharpened end of the needle is exposed outside the inner shield, and a second position, in which the sharpened end of the needle is shielded by the inner shield; wherein interaction between portions of the inner and outer shields (162, 164) during or after proximal displacement of the outer shield from the first position to the second position automatically releases or permits release of the inner shield from connection to the at least one of the base and the fluid connector, characterized in that, the inner shield comprises a cantilevered latch beam connected to the inner shield by a shield latch, wherein the inner shield is connectable via the cantilevered latch beam to at least one of the base and a fluid connector connectable to the base; and the outer shield comprises a hub latch that engages the cantilevered latch beam and prevents radially outward displacement of the cantilevered latch beam to maintain connection between the inner shield and the base when the outer shield is disposed in the first position; and when the outer shield is disposed in the second position, the hub latch engages the shield latch, thereby permitting radially outward displacement of the cantilevered latch beam and preventing further proximal displacement of the outer shield relative to the inner shield. a needle having a sharpened end and an opposing end, the needle being insertable through a base; and a needle shield device, comprising: an inner shield; and an outer shield fixedly connected to the opposing end of the needle and displaceable relative to the inner shield between a first position, in which the sharpened end of the needle is exposed outside the inner shield, and a second position, in which the sharpened end of the needle is shielded by the inner shield; an inner shield; and an outer shield fixedly connected to the opposing end of the needle and displaceable relative to the inner shield between a first position, in which the sharpened end of the needle is exposed outside the inner shield, and a second position, in which the sharpened end of the needle is shielded by the inner shield; wherein interaction between portions of the inner and outer shields (162, 164) during or after proximal displacement of the outer shield from the first position to the second position automatically releases or permits release of the inner shield from connection to the at least one of the base and the fluid connector, characterized in that, the inner shield comprises a cantilevered latch beam connected to the inner shield by a shield latch, wherein the inner shield is connectable via the cantilevered latch beam to at least one of the base and a fluid connector connectable to the base; and the outer shield comprises a hub latch that engages the cantilevered latch beam and prevents radially outward displacement of the cantilevered latch beam to maintain connection between the inner shield and the base when the outer shield is disposed in the first position; and when the outer shield is disposed in the second position, the hub latch engages the shield latch, thereby permitting radially outward displacement of the cantilevered latch beam and preventing further proximal displacement of the outer shield relative to the inner shield.