Abstract: The invention relates to a tube pump including an at least partly flexible tube and a pump element inserted in the tube, where the pump element comprises no more than one non-return valve member and a flow blocking member positioned a distance apart on a rod element. The non-return valve member is oriented on the rod element so as to allow for a fluid flow in the tube through the valve member along the rod element in the direction towards the flow blocking member. The flow blocking member is in a closed configuration placed to block the tube by engaging with the tube walls, and is in an open configuration configured to deform by a deformation of the tube such as to allow for fluid passage. The flow blocking member further is configured to attain its closed configuration when not opened by the tube deformation.

Abstract: A disposable cassette (1) is disclosed having an inlet port (4), an outlet port (5), and a heat exchanger element (3) with a fluid flow channel (9, 10, 15, 29) defined therein, the element being configured for conductive heat transfer between an exterior source and liquid in the fluid flow channel through at least one wall member of the heat exchanger element. The average cross sectional area of the outlet part of the fluid flow channel is substantially smaller than the average cross sectional area of the inlet part of the fluid flow channel. Furthermore is disclosed an assembly for connecting a source of intravenous fluid to a patient, the assembly comprising a sealed sterile packaging enclosing the disposable cassette, a first tube for connecting said source of intravenous fluid to the inlet port of the disposable cassette, and a second tube for connecting the outlet port of the disposable cassette to an intravenous catheter.

Abstract: The invention relates to a tube pump comprising a tube and a pump element inserted in the tube, where the pump element comprises a rod element and a first and a second non-return valve member positioned a distance apart on the rod element. The valve members are oriented in the same direction relative to the rod element so as to allow for a fluid flow in the tube through the first valve member, along the rod element, and through the second valve member. The tube comprises an at least partly flexible tube portion between the valve members such that a repeated deformation of the flexible tube portion acts to alternately close and open the valve members thereby generating a fluid flow through the tube.