A device for delivering a plug in a vessel of a human or animal body, includes an inserter provided with a guiding channel and elements for urging the plug into the channel, characterized in that the channel is adapted for radially compressing the plug during the displacement thereof towards the distal end of the channel. Also in particular, cholinesterase inhibitors that are active at nicotinic receptors and that are selective for acetylcholinesterase over butylcholinesterase are used in treating sleep disorders. During operation of the plasma accelerator, quazi-nonperiodic pulse discharges are ignited and maintained in the discharge channel.