The anesthesiologist of today performs a great variety of functions in addition to clinical anesthesia. Among these, perhaps his most important single function and the one that is most gratifying, is the relief of pain.
Pain, in its severer forms, as for example trigeminal neuralgia, migraine, or the various colics, is one of the heaviest crosses the human race has to bear. Usually pain is a danger signal or warning of some beginning disease process, trauma, or physiological upset. It also may be the hang-over effect of past disease processes. It can arise from purely psychic origin, which is perhaps the most difficult to alleviate.
Transient painful processes usually are no problem, but persistent pain, whether mild or severe, over weeks, months, or years can produce serious and far-reaching sequelae, which affect the patients' work, play, and sleep, alter their personalities, and produce changes in every phase of their daily
Adams RC. DIAGNOSTIC AND THERAPEUTIC NERVE BLOCK: GENERAL CONSIDERATIONS. JAMA. 1951;146(9):801–803. doi:10.1001/jama.1951.03670090033010
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