A needle shield system includes a needle (28), an inner tube (24), a clip (26) within the inner tube, an outer tube (22), and/or a housing. A method of shielding a needle may include housing a portion of a needle within a clip, housing the clip within an inner tube, housing the inner tube within an outer tube, housing the outer tube within a housing, interlocking the outer tube and the housing, withdrawing the needle from the clip, trapping a tip of the needle between the clip and the inner tube, partially withdrawing the inner tube from the outer tube, and/or releasing the outer tube and the housing from each other.Un sistema protector de aguja que incluye una aguja (28), un tubo interno (24), un clip (26) dentro del tubo interno, un tubo externo (22), y/o un alojamiento. Un método para proteger una aguja la cual puede incluir alojar una porción de la aguja dentro de un clip, alojar el clip dentro de un tubo interno, alojar el tubo interno dentro de un tubo externo, alojar el tubo externo dentro de un alojamiento, bloquear el tubo externo y el alojamiento, retirar la aguja del clip, capturar la punta de la aguja entre el clip y el tubo interno, retirar parcialmente el tubo interno del tubo externo, y/o liberar el tubo externo y el alojamiento entre sí.