Management of Severe Unilateral Arm Pain

Diagnostic Considerations

The American Geriatrics Society recommends determining if the severe arm pain represents a fracture, compartment syndrome, septic joint or osteomyelitis, or malignancy with pathologic fracture, with fracture being the most likely given the patient's age and pain characteristics 1
Assess for tense swelling, severe pain out of proportion, and neurovascular compromise to diagnose compartment syndrome 4
Check for fever, erythema, and warmth to diagnose septic joint or osteomyelitis 1
Consider malignancy with pathologic fracture if the trauma mechanism is minimal 1

The American College of Emergency Physicians recommends administering 1000 mg of intravenous acetaminophen every 6 hours on a scheduled basis, providing superior pain control compared to PRN dosing in elderly patients 1, 2, 3
Do not exceed maximum daily safe limits of acetaminophen, especially in elderly patients 5, 6
Apply topical lidocaine patches to the affected arm for localized pain relief, as recommended by the Journal of the American Geriatrics Society 5, 6, 3

The World Journal of Emergency Surgery recommends placing a brachial plexus block at presentation to reduce both immediate and subsequent opioid requirements, providing superior analgesia compared to systemic medications alone for upper extremity injuries 1, 2, 3, 7
Carefully evaluate anticoagulation status before performing any nerve block to avoid bleeding complications, as recommended by the World Journal of Emergency Surgery 1, 2

Consider adding NSAIDs only if severe pain persists despite first-line measures, but use cautiously due to potential contraindications such as renal dysfunction, heart failure, hypertension, GI bleeding risk, and drug interactions, as recommended by the Journal of the American Geriatrics Society 1, 2, 5, 6
Add gabapentin or pregabalin if a neuropathic pain component is suspected, starting at low doses and titrating slowly in elderly patients, as recommended by the World Journal of Emergency Surgery and the Journal of the American Geriatrics Society 1, 2, 3, 4
Consider ketamine 0.3 mg/kg IV over 15 minutes as an alternative to opioids, providing comparable analgesia with fewer cardiovascular side effects, as recommended by Praxis Medical Insights 3, 7

Reserve opioids strictly for breakthrough pain when non-opioid strategies fail, using the shortest duration and lowest effective dose possible, as recommended by the World Journal of Emergency Surgery and Praxis Medical Insights 1, 2, 3, 7
Implement progressive dose reduction due to high accumulation risk, over-sedation, respiratory depression, and delirium in elderly patients, as recommended by the World Journal of Emergency Surgery and Praxis Medical Insights 2, 3, 7

Immobilize the affected arm with appropriate splinting or sling, and apply ice packs to the painful area, as recommended by the World Journal of Emergency Surgery and Praxis Medical Insights 1, 2, 3, 7
Ensure proper positioning to minimize movement-related pain, as recommended by Praxis Medical Insights 3, 7

Systematic pain evaluation using validated scales is mandatory before and during treatment to avoid inadequate pain assessment, as recommended by the World Journal of Emergency Surgery and Praxis Medical Insights 2, 3
Both inadequate analgesia and excessive opioid use increase delirium risk, creating a narrow therapeutic window requiring careful titration, as recommended by Praxis Medical Insights and the Journal of the American Geriatrics Society 3, 4
Never exceed maximum acetaminophen doses when using opioid/acetaminophen combinations, and track total daily acetaminophen from all sources, as recommended by the Journal of the American Geriatrics Society and Praxis Medical Insights 5, 6, 3
Always verify anticoagulation status before nerve blocks to prevent catastrophic bleeding complications, as recommended by the World Journal of Emergency Surgery 1, 2