Complex Regional Pain Syndrome (CRPS) Management

Diagnosis

The American College of Radiology supports the use of MRI, with a reported specificity of 91% but sensitivity of only 35% for CRPS type I, and three-phase bone scan, with higher sensitivity (78%) and specificity (88%) compared to MRI for CRPS type I, as diagnostic tools for CRPS type I 1
Ultrasound may show increased power Doppler flow in affected limbs, with a sensitivity of 73% and specificity of 92%, as a supportive diagnostic tool for CRPS type I 1

Physical counterpressure maneuvers, including isometric exercises of the affected limb, have shown effectiveness in clinical trials and should be started immediately upon diagnosis to improve circulation and reduce sympathetic overactivity 2
The American Diabetes Association supports the use of duloxetine as an effective treatment for neuropathic pain, with high-quality studies backing its use 3
Capsaicin, an FDA-approved 8% patch for neuropathic pain, is supported by high-quality studies as an alternative treatment option for CRPS patients 3
Gabapentin is a first-choice treatment, starting at low doses and titrating up as needed, and has shown effectiveness in reducing hyperpathia, allodynia, and hyperalgesia, with a potential contribution to early reversal of skin and soft tissue manifestations 4
Alpha-2-delta ligands, such as pregabalin, may be considered as an alternative to gabapentin, with a similar mechanism of action 4

Early recognition and prompt treatment provide the greatest opportunity for successful outcomes, with delayed diagnosis or treatment resulting in severe physical and psychological problems 3
Combined pharmacological and physical interventions are more effective than either alone, with a multidisciplinary approach recommended for optimal patient outcomes 3
Patient education should include explaining the condition and its mechanisms, and discussing the importance of early intervention to prevent progression, as recommended by the European Heart Journal 2
A comprehensive approach that begins with physical interventions and education, followed by pharmacological treatments for refractory cases, is strongly supported by the evidence, with gabapentin showing particular promise for pain control and potential disease modification, and the importance of early intervention to prevent progression 4
Limited placebo effect is observed in CRPS, except at very early time points, emphasizing the need for effective interventions 4