Abstract: A device for inserting a thin measurement probe into brain tissue, the device including a skull screw, a guide hose, and a compressive screw connection. The skull screw defines a longitudinal borehole through which the guide hose and a measurement probe extend. The compressive screw connection radially seals, by compression, the measurement probe and the guide hose relative to the skull screw. The guide hose serves as a protective sleeve enclosing the measurement probe and connecting the skull screw to a probe hookup. The guide hose includes further and separate lumina to receive further measurement probes and associated probe hookups, and the guide hose supports the probe hookups.

Abstract: A measuring device for determining the oxygen partial pressure in human brain tissue has a probe (5) with a tube (7) of tissue-compatible plastic material in a measuring region surrounding an electrolyte-filled volume (8). Immersed in the electrolyte, which contains acetate, is a polaragraphic cathode (11) with a limited exposed surface and an anode (13). The tube is oxygen permeable in the measuring region. The electrodes are electrically connected to a measuring apparatus which applies a DC voltage at a first polarity to the electrodes (11, 13) and determines a measuring current using a measuring amplifier. A regenerating device causes the electrodes to be supplied with a regenerating voltage reversed from the first polarity for times and at current magnitudes based on the measurement current and duration.

Abstract: A device for inserting holding and sealing a brain scan probe in a cranial opening has a screw in the cranial opening, an insertion catheter with a probe therein extending through a bore in the screw and a pinch seal in the screw for hermetically sealing the probe in the catheter when it is in position. A protection tube surrounds the catheter and is attached distally to the screw and proximally to a coupling connector. The insertion catheter has an opening which permits longitudinal adjustment of the insertion catheter along the probe and permits introduction of the probe into the catheter and longitudinal movement of the probe.

Abstract: The probe comprises a support of insulating or dielectric material, such as, for example, a glass tube drawn to a closed point at one end. An indicator electrode is supplied as a thin film of metal on the surface of the support, the metal being, for example, platinum or gold. An insulating sandwich-like multi-layer thin film is applied over the indicator electrode film. Preferably, a shielding electrode film is applied over the insulating sandwich-like film and is covered by another insulating film. A composite reference electrode film, including a layer of silver and a layer of platinum or gold, is applied over the outer insulating layer directly or separated by a film of water-proof material such as "TEFLON" and, for special purposes, the reference electrode film may be covered by another film of water-proof material.

Abstract: Measuring probe for a polarographic determination of gas partial pressures in aqueous, and more particularly in biologic, medium, comprises at least a part made up of a plurality of thin films including a polarographic surface having a diffusion film membrane which applies directly on at least the polarographing surface, and wherein at least the film material contiguous to the polarographing surface comprises a thin film of an inorganic insulating material.

Abstract: A puncture probe, comprises a probe support having an end with a probe surface with a plurality of alternately arranged layers of thermoelectric conductive material and insulation formed around said probe support adjacent the probe surface or covering a portion or all of it. At least two pairs of the conductive material layers are in contact at locations which are distinct from each other and they are made of thermoelectric conductive material and form thermocouples, one of these thermocouples being heated either by electric energy of by light energy. The probe surface may be planar at the end and a central portion may be covered by a layer of the insulation. In addition, a conductor film forming an inside covering layer on the probe support may be arranged to join or contact a separate conductive layer which extends downwardly on the outside of an insulation layer into contact with the probe surface.