Hand clinics
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A new classification system, termed complex regional pain syndromes types I and II, has been devised to replace the nomenclature of pain disorders previously termed reflex sympathetic dystrophy and causalgia. CRPS type I does not have identifiable major nerve injury, whereas CRPS type II has an identifiable major nerve injury. The classification is based on clinical symptoms and signs without incorporating any mechanistic connotations. These CRPS disorders may have SMP, SIP, or both.
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The weight of available evidence suggests that reflex sympathetic dystrophy (RSD) is a complex clinical entity that (1) occurs predominantly in young adult women; (2) has five clinical types but presents most frequently as minor traumatic dystrophy; (3) has primary signs and symptoms (e.g., pain, edema, stiffness, and discoloration) that are expressed highly in each clinical type, whereas secondary signs and symptoms are variable; (4) responds well to treatment, regardless of its clinical type; and (5) is managed best when treatment is started early. It can be concluded that RSD is a multifaceted disease that responds well when managed with a multimodal treatment program aimed at the various interacting components of the disorder. The recognition and documentation of the variation of the clinical features of RSD may allow for its earlier diagnosis and treatment and thus significantly improve the chances for a successful outcome.
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RSD is a symptom complex, representing an exaggerated response to injury or tissue damage. The amplification of the normal responses probably occurs both in the periphery and in the central nervous system. ⋯ Treatment modalities must be directed toward optimizing both comfort and function of the affected extremity. Such treatment programs might occur in a multidisciplinary setting.
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It has been helpful in our practice to separate somatic from sympathetic-mediated peripheral nerve pain. We would recommend application of the new nomenclature of type I complex regional pain (sympathetic dystrophy) and type II complex regional pain (causalgia) (see Table 1). We believe it is essential that both of these conditions be separated into their early and late phases and that the treatment alternatives be customized for the individual patient and the peripheral nerve involved. ⋯ The surgeon occasionally may be involved in the manipulation and pinning of contracted joints, as well as release of muscle or joint contractures, followed by a supervised program of early range of motion. Finally, it is important that both physician and surgeon serve as patient advocates when questions of workers' compensation intervene that could deter proper treatment programs or when the patient needs the encouragement and guidance to continue with treatments that don't always initially appear to have immediate results. Finally, requests to the surgeon to find an operative cure must be resisted while continued psychological encouragement is provided.
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Patients with reflex sympathetic dystrophy (complex regional pain syndromes) are often referred to pain medicine physicians for assistance in providing pain control during rehabilitation of their painful upper extremity. When deciding which pain control technique to use in an individual patient, physicians must consider both somatic and sympathetic blocks. Each of these nerve blocks has advantages and disadvantages that may be tailored to an individual patient's pain state and rehabilitation program to optimize recovery.