Clinical Trial – Autonomic Modulation After Spinal Anesthesia With Depth of Anesthesia and Vital Signs.

Spinal anaesthesia has the advantage that produced nerve block by the injection of local
anaesthetic into cerebrospinal fluid (CSF). However, the greatest challenge in spinal
anaesthesia is to control the spread of local anaesthetic through the CSF to provide a block
which is adequate for the proposed surgery without unnecessary extensive spread, and
increased risk of complications.