Regional anesthesia and pain medicine
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Reg Anesth Pain Med · May 2004
Comparative StudyLocating the target nerve and injectate spread in rabbit sciatic nerve block.
The purpose of this study is to determine how close the needle tip is placed to the target nerve using a nerve stimulator and to determine how far the injectate spreads in percutaneous nerve blocks. ⋯ The target nerve was located within 5 mm from the needle with less than 0.5-mA stimulation current. The injectate spread to more than 20 mm on average even when a small volume (100 microL) of the injectate was injected in rabbit sciatic nerves.
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Reg Anesth Pain Med · May 2004
Case ReportsSynovial cysts and the lithotomy position causing cauda equina syndrome.
We describe a case of cauda equina syndrome caused by synovial cysts and the lithotomy position. A transurethral resection of the prostate was performed under spinal anesthesia in the lithotomy position. ⋯ We believe that positioning the patient in the lithotomy position narrowed the cross-sectional area of the spinal canal in a patient with a coexisting critically stenosed lumbar spinal canal. The resultant mechanical pressure caused an ischemic compression injury to the cauda equina.