A needle assembly, 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 connectable to at least one of the base and a fluid connector connectable to the base; 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; characterized in that interaction between the inner shield and the needle 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; the outer shield has a cavity therein for housing the inner shield when the outer shield is in the first position; and the inner shield comprises a spring element disposed about the needle, the spring element having a shield tip, wherein upon proximal displacement of the sharpened end of the needle past the shield tip when the outer shield displaces to the second position, the shield tip automatically displaces laterally to cover the sharpened end of the needle; the spring element comprises a spring clip with latch tabs that connect with hub latches on the fluid connector; as the outer shield displaces to the second position, the sharpened end of the needle displaces proximally past the shield tip, thereby unbiasing the spring clip to laterally displace the shield tip to cover the sharpened end of the needle, and disengage the latch tabs from the hub latches of the fluid connector. 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 connectable to at least one of the base and a fluid connector connectable to the base; 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; characterized in that interaction between the inner shield and the needle 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; an inner shield connectable to at least one of the base and a fluid connector connectable to the base; 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; characterized in that interaction between the inner shield and the needle 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; the outer shield has a cavity therein for housing the inner shield when the outer shield is in the first position; and the inner shield comprises a spring element disposed about the needle, the spring element having a shield tip, wherein upon proximal displacement of the sharpened end of the needle past the shield tip when the outer shield displaces to the second position, the shield tip automatically displaces laterally to cover the sharpened end of the needle; the spring element comprises a spring clip with latch tabs that connect with hub latches on the fluid connector; as the outer shield displaces to the second position, the sharpened end of the needle displaces proximally past the shield tip, thereby unbiasing the spring clip to laterally displace the shield tip to cover the sharpened end of the needle, and disengage the latch tabs from the hub latches of the fluid connector.