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By Prof. Dr. med. J. Lang (auth.), Professor Bernhard Ludwig Bauer M.D., Dieter Hellwig M.D. (eds.)

Endoscopic neurosurgical interventions achieve in value. This e-book offers adetailed description of the new indi- cations of endoscopic methods inmodern neurosurgery. They contain endoscopic stereotaxy, endoscopic evacuations of intracerebral hematomas, cysts and abscesses in addition to endoscopic interventions on mind tumors. a longer over- view concerning the usable endoscopes and the operative gear is mentioned

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Extra info for Minimally Invasive Neurosurgery I

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In other cases, a contraction of the vessels and the development of a thrombus fixed to the vessel is induced by heat. Hot Gas Probe with the help of a so-called active electrode and "leaves" the tissue at a large-sized neutral electrode. In order to perform haemostasis a temperature, which dehydrates the tissue in accordance with the values given in Table 2 is necessary. At higher heat development there is a progressive vaporisation of tissue fluids, which leads by a glue-like process with increased adherence tending to scurfing and finally to carbonization.

7. Vessel occlusion produced with a bipolar EHT-probe Besides this cylindrically-shaped bipolar probe bipolar forceps have been produced at an experimental stage. They have already been used to coagulate vessels of the oesophagus at endoscopic microsurgical dissection of this organ (Fig. 8). Discussion The methods applied are dependent on the particular indications since haemorrhages belong to different conditions. When a spontaneous haemorrhage occurs during an endoscopically performed operation there is a need for a very quick improvement in visibility.

D. Reidenbach Table 2. 250 Several hundred to some extent on the different tissues but to an important extent on the length of time of action. For successful haemostasis a process of denaturation has to be induced, which is accompanied by dehydration. This leads to a desiccation and shrinkage of the cells. The coagulation is to some degree a volume process, where the denatured protein substances melt together thus delivering a sealed tissue surface. In other cases, a contraction of the vessels and the development of a thrombus fixed to the vessel is induced by heat.

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