Abstract: The invention relates to a device (1) for enriching fluids (F) with an enrichment gas in a high pressure region (2) within the device (1) when flowing through the device (1), wherein the high pressure region (2) extends between an inlet side (11) and an outlet side (12) and has a predefined length in the flow direction (D) of the fluid, comprising a pressure boosting unit (3), preferably a first peristaltic pump, at the beginning (21) of the high pressure region (2) for increasing a pressure of the fluid (F) relative to the ambient pressure (UD), a gas supply unit (4) in the high pressure region (2) for supplying the enrichment gas (AG) under increased pressure (HD2) relative to the ambient pressure (UD) to the fluid already under increased pressure (HD1), and a pressure reduction unit (5), preferably a second peristaltic pump, at the end (22) of the high pressure region (2) for reducing the pressure of the fluid (F) at least to an effective pressure (ND) and preferably for conveying the fluid (F) out of the

Abstract: An exchanger device for transferring mass and/or energy between a first medium and a second medium includes a chamber having a first inlet and first outlet of the first medium and through which the first medium can flow. The chamber is equipped with at least one, preferably a plurality, of one mass- and/or energy-permeable exchanger hollow fibers connected at one end to a second inlet and at the other end to a second outlet of the second medium. The second medium can flow through the fiber(s) and the first medium can flow around the fiber(s). The chamber is equipped with at least one pump element for displacing the first medium in and out of the chamber in a pulsing manner. The pump element has an elastically deformable element, is connected to a third inlet of a third medium used as a driving medium, and is expandable by the third medium.