Patent ID: 8545475

Claim:
An infusion arrangement comprising an infusion bag provided with a coupling for transmitting a medical fluid from an injection component to the infusion bag and for transmitting a medical fluid from the infusion bag to a receiving unit connected to the coupling, wherein said coupling comprises: a first coupling component having two channels for conveyance of medical fluids in two opposite directions; a second coupling component having a third channel with a lumen; and a means for releasable connection of the first and the second coupling components to each other for creating the coupling, wherein the releasable connection means is a thread joint and said third channel is provided with a breakable fluid barrier that is arranged to remain intact during connection and upon complete engagement of the first coupling component to the second coupling component, wherein the breakable fluid barrier is contained within the lumen of the third channel, whereby the breakable fluid barrier is arranged to be irreparably broken after said connection has been made when it is desired to transmit medical fluid through the coupling.