Abstract
The broad changes that have occurred in the treatment of intractable pain are considered. There is a new understanding of the anatomy and physiology of pain pathways and pain appreciation. Thus gate control theory, the spinal laminae, and the descending inhibitory pain pathway through the raphe nuclei are discussed in relation to the recent discovery of the opioid (enkephalin) systems. Out of this arises the stimulation methods of pain relief--transcutaneous neural stimulation, periaqueductal stimulation, and acupuncture. These are valuable in patients with a normal expectation of life. For patients with a shortened expectation of life other methods, especially destructive ones, are valuable (though in all types of chronic pain drug therapy is still the most used method). Basic changes in techniques and the equipment used to bring this about are detailed broadly. In particular, the use of the image intensifier X-ray machine and the stimulation and destruction available from the modern lesion generator when used in combination provide accuracy and safety. Techniques and methods are constantly altering and examples of this are given. All this costs money in time, personnel, and equipment; the costings of the Liverpool Centre for Pain Relief are given. Finally, the Pain Relief Foundation is in being in Liverpool in the grounds of Walton Hospital. This has been made possible by a large 'seed' donation by the Wolfson Foundation.
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