Definition Most important factors: Baricity of anesthetic solution (relative to CSF) Hyperbaric (glucose added) – follows gravity, greater cephalad spread, normal dependent portion of spine in supine position is T4-T8 Hypobaric (dilute with sterile water) – spreads in nondependent fashion Isobaric- behave clinically as slightly hyperbaric Patient positioning (during and immediately after injection) Drug dosage […]