The Clinical journal of pain
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Review Case Reports
The assessment and treatment of pain in the emergency room.
A broad spectrum of painful conditions presents to the modern emergency center (EC). The three most common categories are acute, self-limited disorders; chronic medical or surgical syndromes with acute exacerbation; and psychic pain syndromes in which the etiology cannot be easily ascertained. Many factors may differentiate pain from suffering, and physicians should educate patients not only about the nature of their condition and its prognosis, but also about anticipated discomfort. ⋯ Two special groups of patients, those with psychic pain syndromes and those with drug-seeking behavior, can create problems for the physician. Patients with chronic pain syndromes need special follow-up but do not benefit from additional analgesic drug therapy. Patients who seek and abuse drugs can be difficult to identify, may have true underlying medical pathology, and should not be given narcotic prescriptions.
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Recent research advances indicate that specialized neural pathways are involved in the encoding of pain sensations and that these pathways are sensitive to changes in stimulus features, such as intensity, quality, duration, and location. It has also been established that there are three major families of opioid peptides in the brain: the enkephalins, the dynorphins, and the endorphins. In addition to these opioid peptides, other neurochemicals such as serotonin and norepinephrine play a role in the modulation of signals related to tissue damage. ⋯ Opioid drugs are administered into the membranes surrounding the spinal cord to provide long-lasting pain relief. Peripherally acting opioid drugs may represent a new functional class of analgesics devoid of the undesirable side effects of centrally acting opioids. Tricyclic antidepressant drugs are used in the treatment of neuropathic pain, based on their effects on noradrenergic and serotoninergic pathways in the central nervous system.
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In some forms of cerebrovascular disease, such as intracranial hemorrhage, headaches are well known as a prominent symptom and often are a valuable clue to diagnosis. There are difficulties, sometimes, in distinguishing between a small subarachnoid hemorrhage and a severe migraine headache, but these can be resolved using clinical observations, CT scan, and lumbar puncture. It seems less well known that headaches may accompany or precede cerebral thrombosis and embolism. When these headaches are recognized as a forerunner to stroke, they may allow an opportunity for preventive treatment.
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Review Case Reports
Common painful sports injuries: assessment and treatment.
The increasing participation in organized sports has been paralleled by an increasing number of sports injuries. An exact diagnosis of the injury and an understanding of the mechanisms of injury are essential for proper management, relief of pain, and restoration of function. The two mechanisms of injury are single-impact macrotrauma and repetitive microtrauma. ⋯ The roles of non-narcotic analgesics, muscle relaxants, and nonsteroidal anti-inflammatory drugs (NSAIDs) in aiding recovery and restoration of function in sports injuries have been extensively studied. NSAIDs, in particular, have been demonstrated in clinical and laboratory studies to speed recovery from overuse sports injury. Their place in acute sports injuries due to single-impact macrotrauma, however, is more controversial.
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A significant percentage of chronic headache sufferers use excessive quantities of substances for relief. Drug dependency is frequent in these patients. Patients have an impaired lifestyle, sustain organ system damage, may suffer a withdrawal syndrome, and continue to have headaches. ⋯ The mechanism of substance abuse may be related to repeated use of substances that reinforce behavior and stimulate brain reward systems. Treatment includes comprehensive diagnostic workup, withdrawal of the agent, and use of headache preventives. beta-Adrenergic blockers, tricyclic antidepressants, monoamine oxidase (MAO) inhibitors, and nonsteroidal anti-inflammatory agents may be of value. Behavior modification and dietary counseling are also helpful.