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Complex regional pain syndrome — Clinical Guidelines

Overview

Complex regional pain syndrome (CRPS) is a chronic pain condition characterized by severe pain, sensory abnormalities, and motor dysfunction, often following trauma or surgery, disproportionately affecting the extremities. 2 3

Diagnosis

Clinical Criteria: Based on signs and symptoms including pain disproportionate to injury, sensory abnormalities, edema, skin color changes, and motor impairments. 2 3 14

Recommended Tests: Quantitative sensory testing (QST) can help characterize sensory phenotypes but is not diagnostic on its own. 4

Grading: No universally accepted grading system; clinical assessment guides severity. 7

Management

First-Line Treatments:

- Physical Therapy: Including pain exposure physical therapy to address motor control and fear avoidance. 18 3 - Sympathetic Blocks: Such as guanethidine for early-phase CRPS to reduce sympathetic overactivity. 21

Adjunctive Treatments:

- Pharmacotherapy: Antidepressants (e.g., duloxetine), anticonvulsants (e.g., gabapentin), and NMDA receptor antagonists (e.g., ketamine). 19 3 - Spinal Cord Stimulation: For refractory cases, particularly with paddle leads under conscious sedation to minimize complications. 15 - Remote Ischemic Conditioning (RIC): Emerging evidence suggests potential benefits in improving tissue perfusion. 13

Special Populations

Pediatrics: CRPS increasingly recognized; early aggressive rehabilitation is crucial. 14

Elderly: Management focuses on minimizing complications and integrating conservative therapies effectively. 5

Comorbidities: Specific considerations for comorbidities like neurofibromatosis type 1 may necessitate tailored approaches, including novel treatments like oral ketamine. 19

Key Recommendations

Early Aggressive Rehabilitation: Including physical therapy and reactivation exercises to prevent disability progression. (Evidence: Strong 3 18)

Multidisciplinary Approach: Combining pharmacotherapy, physical therapy, and interventional procedures for comprehensive management. (Evidence: Moderate 3 5)

Consider Sympathetic Modulation Early: Utilize sympathetic blocks in the early stages of CRPS to potentially alter disease progression. (Evidence: Moderate 21)

Evaluate Psychological Factors: Address pain-related fears and psychological distress as mediators in treatment outcomes. (Evidence: Weak 18)

Individualized Treatment Plans: Tailor interventions based on patient response and specific clinical presentations, recognizing variability in CRPS presentations. (Evidence: Expert opinion 7)

References

1 Umeh UO, Kalsi MS, Tailor M, Zhong H, Mehta S, Jain N et al.. A cross-sectional study of diversity in regional anesthesia and acute pain medicine fellowships. Canadian journal of anaesthesia = Journal canadien d'anesthesie 2025. link 2 Kanika, Goyal M, Goyal K. Effectiveness of the physiotherapy interventions on complex regional pain syndrome in patients with stroke: A systematic review and meta-analysis. Journal of bodywork and movement therapies 2023. link 3 Shafiee E, MacDermid J, Packham T, Walton D, Grewal R, Farzad M. The Effectiveness of Rehabilitation Interventions on Pain and Disability for Complex Regional Pain Syndrome: A Systematic Review and Meta-analysis. The Clinical journal of pain 2023. link 4 Sobeeh MG, Hassan KA, da Silva AG, Youssef EF, Fayaz NA, Mohammed MM. Pain mechanisms in complex regional pain syndrome: a systematic review and meta-analysis of quantitative sensory testing outcomes. Journal of orthopaedic surgery and research 2023. link 5 Saed A, Neal-Smith G, Fernquest S, Bourget-Murray J, Wood A. Management of complex regional pain syndrome in trauma and orthopaedic surgery-a systematic review. British medical bulletin 2023. link 6 Wang AT, Wang EJ, Smith TJ, Razzak R, Christo PJ. Scrambler Therapy for Patients With Complex Regional Pain Syndrome: A Case Series. Journal of palliative medicine 2023. link 7 Harden RN, McCabe CS, Goebel A, Massey M, Suvar T, Grieve S et al.. Complex Regional Pain Syndrome: Practical Diagnostic and Treatment Guidelines, 5th Edition. Pain medicine (Malden, Mass.) 2022. link 8 Wood E, Ohlsen S, Fenton SJ, Connell J, Weich S. Social prescribing for people with complex needs: a realist evaluation. BMC family practice 2021. link 9 Russo M, Georgius P, Volschenk W, Santarelli D. Commentary on: Outcomes of amputation due to long-standing therapy-resistant complex regional pain syndrome type I. Journal of rehabilitation medicine 2020. link 10 Grieve S, Llewellyn A, Jones L, Manns S, Glanville V, McCabe CS. Complex regional pain syndrome: An international survey of clinical practice. European journal of pain (London, England) 2019. link 11 Schrier E, Dijkstra PU, Zeebregts CJ, Wolff AP, Geertzen JHB. Decision making process for amputation in case of therapy resistant complex regional pain syndrome type-I in a Dutch specialist centre. Medical hypotheses 2018. link 12 Osumi M, Sumitani M, Otake Y, Morioka S. Fear of movement modulates the feedforward motor control of the affected limb in complex regional pain syndrome (CRPS): A single-case study. Medical hypotheses 2018. link 13 Hegelmaier T, Kumowski N, Mainka T, Vollert J, Goertz O, Lehnhardt M et al.. Remote ischaemic conditioning decreases blood flow and improves oxygen extraction in patients with early complex regional pain syndrome. European journal of pain (London, England) 2017. link 14 Barrett MJ, Barnett PL. Complex Regional Pain Type 1. Pediatric emergency care 2016. link 15 Pahapill PA. A Novel Nonanchoring Technique for Implantation of Paddle Leads in the Cervical Spine Under Conscious Sedation. Neuromodulation : journal of the International Neuromodulation Society 2015. link 16 Lazaro RP. Complex regional pain syndrome and acute carpal tunnel syndrome following radial artery cannulation: a neurological perspective and review of the literature. Medicine 2015. link 17 Friedman A. Work-Related Complex Regional Pain Syndrome: Diagnosis and Treatment. Physical medicine and rehabilitation clinics of North America 2015. link 18 Barnhoorn KJ, Staal JB, van Dongen RT, Frölke JP, Klomp FP, van de Meent H et al.. Are pain-related fears mediators for reducing disability and pain in patients with complex regional pain syndrome type 1? An explorative analysis on pain exposure physical therapy. PloS one 2014. link 19 Soto E, Stewart DR, Mannes AJ, Ruppert SL, Baker K, Zlott D et al.. Oral ketamine in the palliative care setting: a review of the literature and case report of a patient with neurofibromatosis type 1 and glomus tumor-associated complex regional pain syndrome. The American journal of hospice & palliative care 2012. link 20 Gann C. Reflex sympathetic dystrophy/complex regional pain syndrome. AAOHN journal : official journal of the American Association of Occupational Health Nurses 2008. link 21 Kumar S, Mackay C, O'Callaghan J, De'Ambrosis B. Complex regional pain syndrome after dermatological surgery. The Australasian journal of dermatology 2008. link 22 Fishman SM. Biofeedback in pain management: Bier blocks for complex regional pain syndrome. Journal of pain & palliative care pharmacotherapy 2008. link 23 Doro C, Hayden RJ, Louis DS. Complex regional pain syndrome type I in the upper extremity. Clinics in occupational and environmental medicine 2006. link 24 Manicourt DH, Brasseur JP, Boutsen Y, Depreseux G, Devogelaer JP. Role of alendronate in therapy for posttraumatic complex regional pain syndrome type I of the lower extremity. Arthritis and rheumatism 2004. link 25 Perez RS, Burm PE, Zuurmond WW, Giezeman MJ, van Dasselaar NT, Vranken J et al.. Interrater reliability of diagnosing complex regional pain syndrome type I. Acta anaesthesiologica Scandinavica 2002. link 26 Stanton-Hicks M, Baron R, Boas R, Gordh T, Harden N, Hendler N et al.. Complex Regional Pain Syndromes: guidelines for therapy. The Clinical journal of pain 1998. link 27 Doury PC. Algodystrophy. A spectrum of disease, historical perspectives, criteria of diagnosis, and principles of treatment. Hand clinics 1997. link 28 Field J, Gardner FV. Psychological distress associated with algodystrophy. Journal of hand surgery (Edinburgh, Scotland) 1997. link80030-7) 29 Simon D. Pain syndromes: case studies. Iowa medicine : journal of the Iowa Medical Society 1991. link

Complex regional pain syndrome