The Clinical journal of pain
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The rationale for improving analgesic therapy is presented. After reviewing the role of drug pharmacokinetic and pharmacodynamic variability in determining the quality of pain relief, newer developments in acute pain management are described: newer opioid and nonopioid analgesic drugs; alternative drug delivery systems; nonpharmacologic approaches, use of combination analgesic therapy. Finally, several possible future research trends in acute pain management are discussed.
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Review Case Reports
Pharmacologic management of bone pain in the cancer patient.
Cancer patients may experience acute or chronic pain caused by tumor infiltration of pain-sensitive structures or related to surgery, radiation, and chemotherapy. Acute bone pain, with or without associated neurologic deficits resulting from tumor metastasis to bone and contiguous neural structures (e.g., large peripheral nerve trunks or the spinal cord), is a common cause of intractable pain in cancer patients. ⋯ Less commonly, invasive therapies, such as resection of vertebral body tumor with spinal reconstruction or pituitary ablation and intraventricular opioid administration (for diffuse bone pain), are offered. In this article I discuss current approaches to the management of pain in cancer patients, emphasizing current hypotheses on the pathogenesis of bone pain and the rationale for its pharmacologic treatment.
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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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Healing or successful intervention usually leads to the resolution of pain. However, in some patients biologic or psychologic symptoms associated with pain persist despite treatment or apparent healing. In cases in which the etiology is not known, persistent pain is categorized as a clinical syndrome known as "chronic pain." Organic, psychologic, and socioenvironmental factors contribute to the development of chronic pain. ⋯ Before successful management can begin, the major etiologic factors and sequelae of the chronic pain syndrome must be understood. Antidepressants, neuroleptics, anticonvulsants, nonsteroidal anti-inflammatory drugs, and hydroxyzine have been proven effective in the treatment of pain syndromes. The treatment of patients who present with chronic pain must be individualized based on a comprehensive understanding of the factors underlying the chronic pain syndrome of each patient.