Medical fluid coupling and a latching connector for establishing a fluid communication between two systems

1. A medical fluid coupling configured to be connected to a connection section of a blood treatment apparatus or of a connecting adapter, the fluid coupling comprising:

a main body comprising:

a receiving section configured for connecting to a fluid conduit of the connection section; and

a first latching element having a first section that is elastically bendable or elastically tiltable, the first latching element comprising at least one of: (i) a recess for receiving a protrusion of the connection section and (ii) a protrusion to reach into a recess of the blood treatment apparatus or of the connecting adapter,

wherein the recess or the protrusion either faces the receiving section, or is arranged at an inner side of the first latching element, or both;

wherein the main body defines a fluid guiding section as a main canal with a lumen for guiding a first fluid through the fluid coupling and defines a secondary canal with a secondary canal outlet for adding a second fluid into the main canal,

wherein the fluid coupling comprises an actuating element arranged relative to the main body to be movable between a first position and a second position, and

wherein the fluid coupling comprises a multiway valve which is operable, by movements of the actuating element, between: (i) a first position of the multiway valve in which the multiway valve does not close or cover the secondary canal outlet and (ii) a second position of the multiway valve in which the multiway valve closes or covers the secondary canal outlet.

2. The fluid coupling of claim 1 , wherein the main body further comprises a second latching element having a second section that is elastically bendable or elastically tiltable.

3. The fluid coupling of claim 2 , wherein the first section of the first latching element and the second section of the second latching element are, in a non-connected state, arranged having a first distance between each other, and wherein, during the process of connecting the fluid coupling to the connection section, the first distance space becomes a second distance which is larger than the first distance.

4. The fluid coupling of claim 2 , wherein at least one of the first section of the first latching element and the second section of the second latching element is designed as a tiltable section or is arranged at a further section of the first and second latching elements in a tiltable manner.

5. The fluid coupling of claim 1 , wherein the main body defines a fluid guiding section therethrough, and wherein an inner diameter of the fluid guiding section remains constant and is between 4.0 and 4.5 mm.

6. The fluid coupling of claim 1 , wherein the main body is made of or comprises a first material, and wherein the fluid coupling comprises at least one sealing element made of a second material which is different from the first material.

7. The fluid coupling of claim 6 , wherein the main body defines a fluid guiding section, and wherein the sealing element comprises a through opening having at least one inner diameter which corresponds to an inner diameter of the fluid guiding section.

8. The fluid coupling of claim 1 , wherein the main body defines a fluid guiding section therethrough having a first end area, a second end area, and at least one further opening which is closed by a septum.