Pain medicine : the official journal of the American Academy of Pain Medicine
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The purpose of this experimentation was to investigate the safety of a novel cooled bipolar radiofrequency system by examining histology and monitoring temperature distribution in the disc, epidural space, and adjacent to the nerve roots. In our study we used two human cadaver lumbar spines, one moderately to severely degenerated and the other mildly degenerated. ⋯ Temperatures reached in the posterior annulus during transdiscal biacuplasty were greater than required (45 degrees C) for neuroablation. Temperatures reached at the neural foramina and epidural were low enough to avoid neural damage.
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Little research substantiates long-term gains in the treatment of phantom limb pain. This report describes and evaluates an eye movement desensitization and reprocessing (EMDR) treatment with extensive follow-up. ⋯ The overview and long-term follow-up indicate that EMDR was successful in the treatment of both the phantom limb pain and the psychological consequences of amputation. The latter include issues of personal loss, grief, self-image, and social adjustment. These results suggest that (1) a significant aspect of phantom limb pain is the physiological memory storage of the nociceptive pain sensations experienced at the time of the event and (2) these memories can be successfully reprocessed. Further research is needed to explore the theoretical and treatment implications of this information-processing approach.
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Case Reports
Adriamycin injection into the medial cord of the brachial plexus: computed tomography-guided targeted pain therapy.
Recent advances in radiographic imaging technology allow for therapeutic agents to be placed within the subepineurium of peripheral nerve tissue. Adriamycin, a chemotherapeutic agent, is retrogradely transported by nerves to their cell bodies residing in the dorsal root ganglia. The combined process of radiological approach, an understanding of the anatomy of the brachial nerve plexus, and the use of agents that are retrogradely transported by nerves allows for targeted neuroablation of nerves. ⋯ Here, we report on the transcutaneous computed tomography (CT)-guided injection of adriamycin into specific branches of the brachial plexus in a patient with metastatic cervical cancer involving the lower plexus whose pain was untreatable by aggressive medical therapy that included epidural trials of opioids. Identification of the medial brachial cord was achieved using CT-guided techniques that included accurate localization with intra-neural dye injection, followed by injection of 0.5 mg of adriamycin. The patient reported complete pain relief within 12 h of the injection.
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Thermal treatment of the lumbar intervertebral disc has been suggested for the treatment of chronic discogenic pain. Disc biacuplasty (D-BAC) is a novel procedure that uses two water-cooled radiofrequency electrodes in a bipolar configuration to heat a large volume of the posterior annulus fibrosus. ⋯ Disc biacuplasty, in a porcine model, achieves suitable temperatures to induce thermal transition of collagen and thermoneurolysis while showing no evidence of damage to neural tissue in safety zones surrounding the disc.