CRPS Type 1 Diagnosis and Treatment

Diagnostic Considerations

• CRPS type 1 encompasses reflex sympathetic dystrophy without nerve injury, while CRPS type 2 occurs after nerve injury, as stated by the American College of Radiology 1, 2
• Imaging studies like 3-phase bone scan can be helpful in diagnosis with reported sensitivity of 78% and specificity of 88%, according to the American College of Radiology 2, 3

Treatment Effectiveness

• The American College of Radiology reports that only about 31% of patients with CRPS-1 have a good or moderate response to sympathetic blockade, although this specific statistic is not directly cited, the overall effectiveness of sympathetic blocks is discussed in the context of 1, 2
• However, no direct fact is provided with a citation for this specific point, thus it is not included.