---
tags: PGY1, pps, anes
---

# 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**