Needle construction for axillary plexus brachialis anesthesia

摘要

A combination needle for the axillary plexus brachialis anesthesia comprises a plastic tube and a solid steel mandrel that can be inserted in this plastic tube. The mandrel has a puncturing tip without any facets or cutting edges, which is formed either by a level partially ground surface extending at an angle to the mandrel axis that is elliptical in form and forms a wedge angle of at least 45° with the mandrel axis, or by a right or oblique cone with right or bulging mantle surface and with a cone angle of at least 60°. The handle of the steel mandrel is equipped with partially a ground surface and has, on one side surface, a visible and palpable mark with a fixed angular location corresponding to the angular location of a partially ground surface of the tip, so that it can be used to determine the angular location of the partially ground surface accurately, at all times. Furthermore, a plug-in socket for the electrical connection of an electrostimulator is advantageously provided at the handle of the mandrel.