Regional Anesthesia

Spinal/Epidural Anesthesia

:::danger Contraindications: Allergy to LA, :arrow_up: ICP :::

Neuraxial anatomy

• Spinal cord extends from skull base → L2
• Dural sac extends from skull base → S2

Midline approach - skin :arrow_right: subQ :arrow_right: supraspinous ligament :arrow_right: ligamentum flavum :arrow_right: epidural space :warning: dura mater :warning: subdural space :warning: arachnoid mater :warning: intrathecal space

:::info T4 = Nipples T10 = Umbilicus T7-8 = Inferior edge of scapula L4-5 = Iliac crest :::

Dermatomes

Thoracic Dermatomes

Lower Extremity