Review Article
Transversus Abdominis Plane Block: An Updated Review of Anatomy and Techniques
Table 1
The classification of ultrasound-guided TAP blocks and the corresponding supplied areas.
| Approach | The main segmental thoracolumbar nerves [15] | Supplied area [15] |
| Subcostal [39ā41] | T6-9 | Anterior cutaneous branches | Upper abdomen just below the xiphoid and parallel to the costal margin |
| Lateral [10, 26] | T10-12 | Anterior cutaneous branches | Anterior abdominal wall at the infraumbilical area, from midline to midclavicular line |
| Posterior [10, 42] | T9-12 | Anterior cutaneous branches (possibly lateral cutaneous branches) | Anterior abdominal wall at the infraumbilical area and possibly lateral abdominal wall between costal margin and iliac crest |
| Oblique subcostal [11, 13, 15, 17, 43] | T6-L1 | Anterior cutaneous branches | Upper and lower abdomen |
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TAP: transversus abdominis plane.
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