Erector spinae plane infiltration and anterior rami of spinal nerve: a cadaveric study
Authors' conclusion
The infiltration of injectate into the ESP does not contact the ventral rami of segmental spinal nerves.
Study context
- Population
- Unembalmed cadavers, ESP infiltration at T9 transverse process level (20 mL ropivacaine 0.2% and methylene blue 0.01%)20 ESP infiltrations
- Participants
- 10 participants
- Outcome
- Distribution of ESP infiltration (dye) to the ventral rami
Methodological detailsobservational, bilateral injections, unembalmed cadavers
- Observational
- Bilateral injections
- Unembalmed cadavers
Main finding
As reported in the abstract
Dye distribution after ESP infiltration
Longitudinal spread across paravertebral musculature, median vertebral spaces (T5-L2)
10
Range of longitudinal spread, spaces
3 to 18
IQR of longitudinal spread, levels (T4-L2)
11
Observational data: associations, not effects.
Further findings
| Outcome | Values |
|---|---|
| Longitudinal dye spread across paravertebral musculature | ESP infiltration median 10 (range 3–18) vertebral spaces · median extent T5-L2 · IQR 11 levels (T4-L2) |
Longitudinal dye spread across paravertebral musculature
- Predominantly affecting longissimus and iliocostalis muscles
Original publication
Erector spinae plane infiltration and anterior rami of spinal nerve: a cadaveric study. Reg Anesth Pain Med. Published 30 June 2024. doi:10.
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