The injection of ten ml of air into the retroperitoneal space outlines the anterior margin of the psoas muscle. This been found to be useful, using an Image Intensifier, for the accurate location of needle tips in the performance of neurolytic lumbar sympathectomy.
References
1.
LöfstromB., and ZetterqvistS. (1969): “Lumbar sympathetic blocks in the treatment of patients with obliterative arterial disease of the lower limb”, International Anaesthesiology Clinics, 7, 423.
