Abstract: A heart-lung machine comprises flexible tubing 2, 4, 6, 8 and 10 integrated in an extracorporeal blood circuit of the heart-lung machine. A pump 5 pumps the blood of a patient through at least portions of the extracorporeal circuit. Furthermore, compressed fluid actuated control members 20, 21 are provided acting on one flexible tube 6, 10 of the tubing from without. A control means 11 controls the supply of compressed fluid to the control members. In accordance with the invention the compressed fluid supplied to the compressed fluid actuated control members has an operating pressure in the range 2 to 10 bar.

Abstract: A heart-lung machine comprises flexible tubing 2, 4, 6, 8 and 10 integrated in an extracorporeal blood circuit of the heart-lung machine. A pump 5 pumps the blood of a patient through at least portions of the extracorporeal circuit. Furthermore, compressed fluid actuated control members 20, 21 are provided acting on one flexible tube 6, 10 of the tubing from without. A control means 11 controls the supply of compressed fluid to the control members. In accordance with the invention the compressed fluid supplied to the compressed fluid actuated control members has an operating pressure in the range 2 to 10 bar.

Abstract: The invention relates to an apparatus for measuring physiological parameters of blood conveyed within an extracorporeal circulatory system. Two light sources (1a, 1b) emit light of varying wavelength into a spherical cavity (3) that comprises a reflective inner surface (3a). Light sensor means (2) receives part of the light propagating within the cavity (3). A tube portion of the extracorporeal circulation can be inserted into a second cavity (4) such that the light (La, Lb) emitted by the light sources encounters the boundary surface between the blood and an inner wall of the tube. The light returns to the cavity (3) at least to an extent by means of reflection and/or transmission.

Abstract: A hose fastening arrangement for roller pumps, especially for a heart-lung machine, which possesses a head constituted of a pump stator and pump rotor, including fastening devices for fastening of the pump piece which is inserted into the pump head of the roller pump. The hose fastening arrangement for roller pumps of the above-mentioned type is detachable from the pump head of the roller pump.

Abstract: A roller pump for heart-lung machines with a pump head, consisting of a pump stator which possesses a pump bed serving as a support for a hose piece or length, and a pump rotor which is arranged in the pump stator so as to be rotatable about its central longitudinal axis and which possesses rollers rotatably supported on a roller carrier, which during a rotation of the pump rotor travel along the hose piece which is inserted into the pump head, and including a drive unit for producing the rotational movement of the pump rotor and with a pump housing for the support of the pump head and for receiving the drive unit which is inventively configured in such a manner that the drive unit is connected with the pump head whereby the pump head is moveable relative to the pump housing.

Abstract: A roller pump for medical technology, in particular for pumping blood in extracorporeal circulations. The roller pump has a stator (1) with a cylindrical hollow space (2), the wall structure of which is formed as a support wall (3) for a pump tube (5) led along this wall about the central longitudinal axis of the hollow space. A pump rotor is rotatably arranged about its central longitudinal axis (4) in the pump stator, the rotor having rollers (8) which are rotatably supported on roller supports (7) and roll along the tube upon rotation of the rotor and compress the tube. The support wall (3) of the pump stator has an opening (6) with an inlet region (10) and an outlet region (12) for the tube (5) and, in these regions, this support wall deviates from the circular path of motion of the pump rollers (8) at a differing curvature along the direction as this path of motion.

Abstract: A vascular catheter for cannulating arterial or venous vessels, for example in the fermoral region, or the vena cava and/or the right auricle of the heart, comprises a flexible tube having blood passage orifices in the nature of holes at its anterior and insertion end to be inserted in the vessel or the auricle, which tube is directly or indirectly connectable at its other open end to a conduit or appliance. A piston-like closure member is movable to and fro in the tube in lengthwise direction thereof, such that it covers and thereby closes at least same of the blood passsage orifices in one position in the tube and clears these orifices in other positions. Preferably, the closure member is so fashioned that in its closure position, it covers all blood passage orifices in the insertion end of the cathether tube.