Features of the Complex Regional Pain Syndrome:
(1) Allodynia, hyperalgesia or spontaneous pain is present.
(2) The experienced discomfort is regional but not limited to the distribution of a single nerve.
(3) The experienced symptom is out of proportion with the inciting event.
(4) There is evidence of edema, skin blood flow abnormality, or abnormal sudomotor (sweating) activity in the region of pain. The onset follows the inciting event or onset of pain and there is a distal predominance to the abnormal findings.
(5) The disorder may show a variable progression over time and can result in motor impairment.
(6) There is no other condition that would otherwise account for the degree of pain and dysfunction.
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CRPS Types
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Type I
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Type II
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old name:
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reflex sympathetic dystrophy (RSD)
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causalgia
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distinguishing features
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no definable injury to nerve; may follow a noxious stimulus
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definable nerve injury present
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where:
• hyperalgesia = excessive sensitivity to pain
• allodynia = a painful response to a stimulus that would normally be non-noxious.
