Adductor canal block techniques do not lead to involvement of sciatic nerve branches: a radiological cadaveric study
Authors' conclusion
Adductor canal block techniques are unlikely, even when using larger volumes, to block the sciatic nerve, or its main branches.
Study context
- Population
- Fresh, unfrozen and unembalmed human cadavers36 blocks
- Participants
- 18 participants
- Comparison
- Distal femoral triangle vs Distal adductor canal
- Outcome
- Incidence of coverage of sciatic nerve divisions (injectate spread on whole-body CT)
Methodological detailsradiological, randomized, Injectate 1:10 dilution of contrast medium in local anesthetic; spread assessed by whole-body CT
- Radiological
- Randomized
- Injectate 1:10 dilution of contrast medium in local anesthetic; spread assessed by whole-body CT
Main finding
As reported in the abstract
Coverage of sciatic nerve or its main divisions
- No coverage of the sciatic nerve or its main divisions
Further findings
Spread to the popliteal fossa
- Contrast spread to popliteal fossa, of 36 blocks
- 3
Saphenous and femoral nerve involvement
- Contrast reached the saphenous nerve after all injections; femoral nerve always spared
Original publication
Adductor canal block techniques do not lead to involvement of sciatic nerve branches: a radiological cadaveric study. Reg Anesth Pain Med. Published 29 June 2023. doi:10.
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