| abstract |
A medical instrument, comprising a female connector (11) member incorporating a female taper portion (13) capable of being joined to a medical instrument member (X) having a male connector member (12) incorporating a male taper portion (15) and a ring member (17) provided to said male connector member (12) so as to encircle said male taper portion (15) and having at least one threaded ridge (23) formed on the inner circumferential surface thereof, which medical instrument is characterized by having formed on the outer periphery of said female connector member (11) at least one threaded groove (21) capable of being helically fitted on said threaded ridge (23) of said ring member (17) and having formed at a desired position in said threaded groove (21) a rib (22) adapted to engage with said threaded ridge (23) when said threaded groove (21) is being helically fitted on said threaded ridge (23). The first medical instrument member (XI is, for example, a three-way faucet, and the second medical instrument member (Y) is, for example, an artificial organ such as a Ruer port connector and an artificial lung, catheters, blood circuits for the artificial organs. |