For an adult patient with left wrist pain, prior wrist fusion, broken screws, and a distal ulna fracture 10 weeks ago not improving with a cock‑up wrist brace, should the brace be changed to a DonJoy rigid orthosis and should pregabalin (Lyrica) be started for suspected cervical radiculopathy pain?

Orthotic Management and Pregabalin for Complex Wrist Injury with Suspected Cervical Radiculopathy

Yes, transition to a more rigid orthosis like a DonJoy brace for the non-healing distal ulna fracture at 10 weeks, and initiate pregabalin for the cervical radiculopathy component, as pregabalin demonstrates efficacy for neuropathic pain from cervical nerve root compression.

Orthotic Management for Non-Healing Distal Ulna Fracture

Current Clinical Context

At 10 weeks post-fracture with broken hardware from prior fusion, lack of improvement in a cock-up wrist brace signals inadequate immobilization. The cock-up splint primarily addresses wrist flexion/extension but may not provide sufficient stability for a distal ulna fracture with compromised hardware.

Brace Transition Rationale

• More rigid immobilization is appropriate when fractures fail to progress at expected timeframes (typically 6-8 weeks for distal forearm fractures)
• A DonJoy-style rigid orthosis provides:
  • Enhanced ulnar-sided support
  • Better control of forearm rotation (pronation/supination)
  • Improved stabilization of the distal radioulnar joint
  • Reduced micromotion at the fracture site

Important caveat: Recent evidence shows untreated ulnar styloid fractures don't compromise wrist function long-term 1, but your patient has a distal ulna shaft fracture with broken hardware—a different clinical scenario requiring continued immobilization.

Imaging Considerations

Before changing orthotic management, obtain updated imaging:

• Radiographs of the wrist are appropriate for assessing fracture healing, hardware position, and alignment 2
• CT without contrast may be appropriate if radiographs are inconclusive, as CT provides superior bone detail for evaluating union, hardware integrity, and trabecular bridging 2, 3

Pregabalin for Cervical Radiculopathy

Diagnostic Confirmation

The neck-to-wrist pain pattern suggests cervical radiculopathy. Before initiating pregabalin:

Clinical indicators supporting cervical origin:

• Upper limb radiating pain distribution following dermatomal pattern
• Neck pain with arm symptoms
• Positive Spurling test, shoulder abduction test, or upper limb tension test 4
• Diminished deep tendon reflexes (particularly triceps) 4

Imaging pathway 5:

• MRI cervical spine without contrast is usually appropriate as initial imaging for suspected cervical radiculopathy
• MRI provides optimal visualization of nerve root compression from disc herniation or foraminal stenosis
• Important: 75-90% of cervical radiculopathy resolves with conservative treatment 5, so imaging is not urgent unless red flags present

Pregabalin Initiation

Pregabalin is FDA-approved for neuropathic pain and demonstrates efficacy specifically for cervical radiculopathy 6, 7, 8.

Evidence Supporting Use:

• Japanese multicenter study showed pregabalin significantly improved pain-related sleep interference (primary endpoint, P<0.001) and pain scores in chronic cervical radiculopathy at median dose 49.6 mg/day 7
• Asian population study demonstrated significant VAS reduction at 4 weeks (P=0.001) and 8 weeks (P<0.0005) with pregabalin 75-150 mg twice daily 8
• Cochrane systematic review confirms pregabalin efficacy for neuropathic pain with NNT 5-9 for 50% pain reduction 9

Dosing Strategy:

Start low, especially given Asian population data showing efficacy at lower doses 7, 8:

1. Initial: Pregabalin 75 mg twice daily (150 mg/day total)
2. Titration: If <50% pain reduction after 4 weeks, increase to 150 mg twice daily (300 mg/day)
3. Maximum: 600 mg/day if needed, though lower doses often sufficient for cervical radiculopathy

Critical Safety Considerations:

• Somnolence is the most common adverse effect causing discontinuation (44% dropout rate in one study) 8
• Occurs early, even at lowest doses
• Warn patient about dizziness and somnolence—no driving or operating machinery until tolerance established 6
• Dose adjustment required if creatinine clearance <60 mL/min 6
• Monitor for peripheral edema, particularly if patient has cardiac history 6

Common Pitfall to Avoid

Do not attribute all wrist pain to the local fracture when cervical radiculopathy is present. The combination of:

• Prior wrist fusion with hardware failure
• New distal ulna fracture
• Cervical radiculopathy

creates a dual pain generator scenario. Both require simultaneous management—rigid immobilization for the fracture and pregabalin for the neuropathic component.

Integrated Management Algorithm

1. Obtain updated wrist radiographs to assess fracture healing and hardware status
2. Transition to rigid DonJoy-style orthosis for enhanced ulnar-sided immobilization
3. Perform cervical spine clinical examination (Spurling test, reflex testing, dermatomal sensory exam)
4. Initiate pregabalin 75 mg twice daily for suspected cervical radiculopathy
5. Order MRI cervical spine without contrast if symptoms persist beyond 4-6 weeks or if considering epidural steroid injection 5, 4
6. Reassess at 4 weeks: If pain not reduced by 50%, increase pregabalin to 150 mg twice daily and consider physical therapy 4, 10
7. If no improvement at 8-12 weeks: Consider CT wrist without contrast for detailed fracture assessment and potential surgical consultation for hardware revision

The combination approach addresses both mechanical instability (rigid orthosis) and neuropathic pain (pregabalin), which is appropriate given the complex, multi-level pathology in this patient 7, 11.