[Topographical and anatomic substantiation of sheath block of the brachial plexus].

The authors have studied the anatomic peculiarities of the fascial case of the plexus in an experiment on 60 preparations of the brachial plexus as well as the ways of diffusion of the solution along the case making use of various methods of block. It has been shown that the fascial case forms a closed space determining the diffusion of the solution on a considerable way along the plexus. The main way of diffusion of the anaesthetic solution are the paravasal loose connective tissue structures. On the basis of the clinical application of this method in 85 patients the authors believe that the punction of the plexus case provides for a reliable and effective block and is characterized by safety and technical simplicity, which allows to recommend the case method for wide clinical use.