Abstract: A medical coupling for a cannula or the like includes a female member (1) with a body providing a hub (4) defining a socket (11), a valve section (5) with a valve actuator (15) slidable on the body, and a finger gripping section, and a male member (2) including a spigot (20) for engagement in the socket (11), a cap (21) with a screw thread for engagement with a flange (9) of the hub (4), an internally splined sleeve (24) and a finger gripping section (22). When the spigot (20) is inserted into the socket (11), the cap (21) is rotated onto the flange (10) to hold them against being pulled apart, and the valve actuator is displaced to open the valve and to bring a splined collar (19) into locking engagement with the sleeve (24). A separate casing (30) is provided to form sealed housing around the coupled parts of the male and female members between their griping sections (6, 22).

Abstract: A medical coupling has male and female members (1, 2) which push fit together, and a screw cap (7) which secures the members against separation. To prevent unintentional release of the cap, locking means, such as a ratchet and pawl mechanism, are provided between the cap and female member. An outer shell (25) can enclose the cap for providing an enclosure around the fluid connection to deter bacterial contamination. Alternatively a separate capsule can enclose the coupling for this purpose. The two members and cap are connectable by holding gripping portions which are located remotely from the parts forming the fluid connection to reduce risk of contamination. A valve system is associated with the female member for closing a flexible tube connected to this member and to displace liquid to fill the space left in this member when the male member is disconnected from it.