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

A system, comprising:

• a fluid coupling;
• and
• a connection section of a blood treatment apparatus or of a connecting adapter, wherein the fluid coupling comprises:
• a sealing element comprising a first section, a second section, and a through opening through the first section and the second section;
• and
• a main body comprising:
• a receiving section configured for connecting to a fluid conduit of the connection section;
• a connecting section configured for connecting the fluid coupling to a fluid system;
• 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 or (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 fluid coupling and the connection section are designed and provided to be latched together in a latching connection:
• the main body is made of or comprises a first material;
• the sealing element is made of a second material that is different from the first material;
• the main body defines a fluid guiding section therethrough for guiding a fluid through the fluid coupling in a longitudinal direction;
• a first inner diameter of the through opening through the first section of the sealing element is smaller than a second inner diameter of the through opening through the second section of the sealing element;
• and
• the first inner diameter of the through opening through the first section of the sealing element is equal to an inner diameter of the fluid guiding section, wherein the inner diameter of the fluid guiding section remains constant along a length of the fluid guiding section extending between a first end area of the fluid guiding section proximate the connecting section and a second end area of the fluid guiding section proximate the sealing element.