Hyperbaric 0.5% bupivacaine because of the amount of the block may be adequate for all operational procedures that are made in the spinal anesthesia, but sometimes gives unnecessary high block that can give significant changes in the pressure and in the pulse.
Results with high statistic significancy show that the baricity have an essential effect on the behavior of the basic hemodynamic parameters in the sense of reduction of the arterial blood pressure and slowing down of the pulse.
The device has been created as result of interaction of modern scientific knowledge of electrophysiology of peripheral nervous system and practical solutions in the field of digital technique and presents contemporary tool in practicing peripheral nerve blocks.
It would be very interesting to consider the possible effect of tricyclic antidepressants on the block of the vegetative (sympathetic) fibers and the possible hemodynamic changes that can occur, by studying the above- mentioned block modes.