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JOURNAL ARTICLE
REVIEW
Neurosurgical approaches to pain treatment.
Acta Anaesthesiologica Scandinavica 2001 October
In a multidisciplinary approach to the management of chronic pain, neurosurgical methods are an indispensable part of the therapeutic armamentarium. With the exception of percutaneous interventions for trigeminal neuralgia and facet joint syndromes, most ablative pain surgery procedures (neurotomy, rhizotomy, sympathectomy, etc.) have been replaced by neuromodulatory approaches such as electrical stimulation of the central nervous system (CNS). However, cordotomy is still a valuable operation for certain forms of cancer related pains (Pancoast's syndrome, breakthrough pain) which are relatively resistant to pharmacotherapy. Another example of ablative surgery is the dorsal root entry zone (DREZ) operation, which is generally the only treatment option for pain due to root avulsion and segmental pain in spinal cord injury. Spinal cord stimulation (SCS) has proven to be most useful for the management of pain following peripheral nerve injury (including complex regional pain syndromes) and rhizopathy. For these conditions which are otherwise often therapy resistant, SCS may produce substantial and long-lasting pain relief in 60-70% of the patients. Considering that such pains are common and the fact that SCS has been shown to be cost-effective, this treatment is no doubt at present underused. Complications and side-effects are very rare. SCS has also been found to be useful for pain in peripheral vascular disorders and angina pectoris. In the latter condition the overall results are favorable in about 80% of patients with a significant reduction of the frequency and severity of angina attacks and the need for nitrates. Stimulation of the motor cortex is a novel and promising treatment of central, post-stroke pain and painful trigeminal neuropathy.
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