Pain is defined as an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage1. Chronic pain is difficult to treat and often the interventions fail. This failure is, in part due to the fact that chronic pains usually result as a manifestation of some chronic degenerative, inflammatory or neoplastic process. As far as the choice of interventions is concerned, the indication for its use may not be well justified, and the choice itself may be determined by the type of specialist and not by the actual clinical picture. The various treatment interventions usually fail due to non- compliance of patients towards the untoward side effect of the systemically used drugs. The patient may not receive the treatment for appropriate time and dosage due to the side effects. Furthermore, indication of specific treatment modality depends upon the evidence of positive effects of the modality, as indicated in various control trials or the related literature2.
Key words: Pain, nerve block, anesthetics
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