 
         
         
         Abstract
         
         Experience with more than 200 neuroendoscopic procedures taught us the advantages
            and disadvantages of the different endoscope designs. Using an endoscope with a sheath
            with separate channels for the endoscope, the instruments as well as for rinsing and
            suction we found advantages in rinsing properties, handling, and preciseness of instrument
            steering. On the other hand an endoscope with a sheath with a singular channel for
            the endoscope itself, the instruments, rinsing, and suction the advantages were better
            in visualization of the instruments, more available instruments, and easier extraction
            of larger specimen. The knowledge of these advantages makes it possible to select
            the adequate endoscope regarding its design, especially in more complicated cases.
         
         
         
            
Key words
         
         
            Neuroendoscopy - complications - hydrocephalus - third ventriculostomy
          
      
    
   
      
         References
         
         
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Priv.-Doz. Dr. Uwe Kehler
            Klinik für Neurochirurgie · Universitätsklinikum Eppendorf
            
            Martinistr. 52
            
            20246 Hamburg
            
            Germany
            
            Phone: +49-40/42803-2751
            
            Fax: +49-40/42803-8121
            
            Email: kehler@uke.uni-hamburg.de