Abstract: A winding system for winding up concatenated hollow fibers onto a winding core includes a winding core of a device for the mass transfer and/or heat exchange between two media and which winding core is to be inserted together with the hollow fibers wound thereon, into the housing of the device and to remain therein, and at least one coupling element, preferably two coupling elements, wherein the at least one coupling element has two axially opposing connecting regions and is temporarily connectable, by means of the first connecting region, to the winding core for conjoint rotation therewith, and is temporarily connectable, by means of the second connecting region, with a drive for conjoint rotation therewith, the drive being provided for the rotation of the winding core about a winding axis.

Abstract: The invention relates to a method for producing a device for a mass transfer between two fluids, wherein at least one hollow-fiber mat (9) is wound on an at least partly hollow core assembly (1, 1a, 1b, 2), and the formed coil is inserted into a housing (10). The assembly of the housing (10) and the coil is then sealed (10), in particular potted, with a sealant at the opposing axial ends in the regions between the hollow-fiber ends and the housing. The core assembly (1, 2) is made of at least two axially adjacent core parts (1, 1a, 1b, 2) arranged one behind the other, at least one (1, 1a, 1b) of which has a hollow design, and the core parts (1, 1a, 1b, 2) are kept in specified axial positions relative to each other, in particular at a distance to each other, by means of at least one aid element (7) at least over the period of the sealing process and preferably over the period of the winding process as well.

Abstract: A device for mass transfer between blood and a transfer medium, in particular a gas/gas mixture, includes a chamber through which blood can flow and in which a plurality of mass-permeable hollow fibers of at least one hollow fiber mat, in which the hollow fibers are held at a spacing by way of warp threads, are disposed in the form of a wound or folded hollow fiber package, wherein a transfer medium is able to flow through, and blood is able to flow around, the hollow fibers, and wherein the density of hollow fibers varies locally in the hollow fiber package in the cross-section perpendicular to length of the hollow fibers. Hollow fiber packages and methods of manufacturing thereof are provided in which the hollow fibers are held at a spacing by warp threads, in which the spacing between adjoining hollow fibers is locally increased, in particular compared to a predominantly equidistant spacing between the hollow fibers.

Abstract: The invention relates to an apparatus for exchanging material between blood and a gas/gas mixture, comprising a chamber (1) through which blood can flow and in which a plurality of material-permeable fiber tubes is provided, the gas/gas mixture being flowable through the fiber tubes, blood being flowable around the fiber tubes. At least one deformable element (9) is provided in the chamber (1) in addition to the fiber tubes, through which the gas/gas mixture can flow, this deformable element being deformable and restorable, in particular compressible out of a relaxed shape and restorable to a relaxed shape by pressure fluctuations acting on the at least one element (9) externally, in particular pressure fluctuations transmitted by the blood in the chamber (1).

Abstract: The invention relates to a blood cannula for discharging blood into a vessel, in particular aortic cannula for discharging blood into an aortic arch during heart-bypass surgery, comprising a tubular body (1), the tubular body having a straight part at the proximal end (2) and a bent part at the distal end (3) leading into an outlet opening (5), wherein the distal end (3), in particular the bent part has an increasing cross section in the direction of blood flow (B).