Episode 339: Highly Tested Autonomic Blocks with Eric Wang

Autonomic blocks serve as critical tools for managing visceral and sympathetically maintained pain, such as complex regional pain syndrome (CRPS) and cancer-related abdominal pain. Dr. Eric Wang, an Associate Clinical Professor at Johns Hopkins, details the clinical application of these procedures, emphasizing the necessity of understanding specific anatomical landmarks—like the C6 tubercle for stellate ganglion blocks—to mitigate risks such as vertebral artery injury or seizures. The discussion highlights the "rest stop" analogy, where sympathetic ganglia act as relay points for pain signals, and contrasts the use of neurolytic agents like alcohol and phenol. While orthostatic hypotension and diarrhea are expected physiological responses to sympathetic blockade, practitioners must remain vigilant against severe complications like paraplegia or genitofemoral neuralgia. These blocks provide essential, multidisciplinary relief for patients suffering from chronic pain conditions that remain refractory to standard treatments.