Poly(2-hydroxyethyl methacrylate) particles for preoperative endovascular occlusion of extensive angiodysplasias.

The application of superselective endovascular occlusion in vascular radiology has broadened the scope of possible radical surgery of giant angiodysplasias by reducing considerably the risk of severe haemorrhage during the surgery. Occlusion was performed on 229 patients using spherical and cylindrical particles of porous poly(2-hydroxyethyl methacrylate). The treatment of a patient suffering from angiodysplasia of the pelvis is described as an example. The first day following endovascular occlusion a hypercoagulation reaction developed, with a decrease of both the level of fibrinolysis and of anticoagulant factors. This was mainly due to a decrease of the level of antithrombin III and activation of the factor XIII indicating a strong tendency of intravascular thrombosis. During the third day, the hypercoagulation reaction increased. However, on the fifteenth day, parameters of the haemostasis system were close to normal values. Only the activity of the factor XIII remained high suggesting the stabilization and the organization of fibrin clot in the embolized blood vessel territory.     

Chromatographie der Lipide auf Glasfaserpapier

Zusammenfassung In der vorliegenden Arbeit wird die Anwendung der Chromatographie auf Filterpapier aus Glasfasern zur Trennung von Lipiden der Hautoberfläche und einiger anderer natürlicher Fettgemische (inneres und subcutanes menschliches Fett, Lipide des Blutserums und des Herzmuskels) beschrieben. Mit dieser Methode können die Fettgemische in ihre einzelnen Komponenten zerlegt werden. Die grundlegende Bedingung für eine gute Trennung ist die gründliche Sättigung der Kammeratmosphäre und des Glasfaserpapiers mit dem Lösungsmittel. Die mit dieser Methode erhaltenen Ergebnisse zeigen, daß sich das Hautoberflächenfett in seiner Zusammensetzung wesentlich von den übrigen Organfetten unterscheidet.Mit 3 Textabbildungen     

Comparison of absorbed doses from cobalt irradiation sources

A comparison of absorbed doses from medical cobalt beams was performed by means of thermoluminescent dosimeters at all radiotherapeutic workplaces in Czechoslovakia. At most workplaces (58%) the deviation from the reference primary etalon placed at the Institute of Radiation Dosimetry of the Czechoslovak Academy of Sciences was below 3%. Neither of the workplaces exhibited deviation higher than 5%, indicating a good level of clinical dosimetry.