Abstract: A biopsy needle arrangement (20) comprises a needle sheath (22) constituting an elongated tube having a sheath opening (203) at a distal end (202). The biopsy needle arrangement (20) also comprises a needle (21) having a length that is greater than the length of the needle sheath (22). The needle (21) comprises an elongated shaft portion configured to fit inside and slide relative to the needle sheath (22), and a tip (23) located at a distal end (212) of the needle (21). The biopsy needle arrangement (20) further comprises an intermediary (25) having a length that is greater than the length of the needle sheath (22). The intermediary (25) comprises an elongated shaft portion parallel with the needle (21) and configured to fit inside the needle sheath (22) and configured to slide relative to the needle sheath (22) and slide relative to the needle (21).

Abstract: A medical needle arrangement (100, 1000, 1400) is disclosed. The needle arrangement (100, 1000, 1400) comprises: a needle sheath (104, 002, 1402), and a needle (202, 1102, 1406) comprising: an elongated portion and a sealing member (204, 1003, 1403) being arranged to a front end of the elongated portion. The needle arrangement is adapted to bet set in: a closed position, in which the sealing member (204, 1003, 1403) is arranged to abut at least a portion of a front end surface of the needle sheath (104, 1002, 1402) thereby restricting intrusion of foreign matter in an area between the needle sheath and the needle, and an open position, in which a gap (1204, 1506) is formed between the sealing member (204, 1003, 1403) and the front end surface of the needle sheath (104, 1002, 1402). Embodiments include needle arrangement for injection, for aspiration, and for biopsy purposes.