Sites of Sensory Blockade During Segmental Spinal and Segmental Peridural Anesthesia in Man

Anaesthetic management during labour of a manifesting carrier of Duchenne muscular dystrophy

“…In the past, however, the phenomenon was well recognised during thoracic spinal anaesthesia using intrathecal catheters. 13 The alternative possibility is that this was a subdural extra-arachnoid block. This is characterised by extensive spread of sensory block from small doses of local anaesthetic, with minimal hypotension and motor block.…”

Immediate Pain Response to Interlaminar Lumbar Epidural Steroid Administration: Response Characteristics and Effects of Anesthetic Concentration

“…Smallvolume, locally delivered epidural anesthetic injection has been shown to retain a local regional block effect. 55 Cortical somatosensory evoked responses are retained with lumbar epidural blockades, with neural pathways remaining intact, even in the setting of adequate surgical anesthesia. 56 No significant difference in cortical evoked response is noted between control and 10 mL of 0.25% bupivacaine, but a concentrationrelated effect on evoked potential amplitude is found with 10 mL of 0.5% and 10 mL of 0.75% bupivacaine.…”

Some Interesting Observations in Neurological Urology

“…Finally, one must not forget that detrimental effects, such as para plegia, may result from long lasting anesthetics (efocaine) injected into peripheral nerves (16,28) or after epidural anesthesia (14,18). Agents injected extrathecally will eventually reach the subthecal space in concentrations high enough to cause subthecal spinal anesthesia (20). Exclusion of pre-existing neurologic disease is a prerequisite prior to spinal anesthesia if deleterious sequelae are to be prevented (33).…”