Can a patient with a month of leg pain and a mid‑shaft fibular partial non‑union from an old fracture safely walk or bear weight while awaiting orthopaedic evaluation?

Can Your Patient Walk on This Fibular Non-Union?

Yes, your patient can walk with protected weight-bearing using assistive devices (crutches or walker) until she sees orthopaedics, but she should not bear full unrestricted weight.

Immediate Management Recommendation

Your patient has a chronic fibular non-union from an old fracture that is now symptomatic. While the fibula is not the primary weight-bearing bone of the leg (the tibia bears ~85% of load), the persistent pain after one month indicates instability or mechanical irritation that warrants protection.

Specific walking instructions:

• Allow partial weight-bearing (approximately 50% body weight or "touch-down" weight-bearing)
• Provide bilateral crutches or a walker to offload the affected limb
• Consider a walking boot for additional stability and comfort
• Advise against prolonged standing or walking distances

Rationale Based on Evidence

Why Partial Weight-Bearing is Appropriate

The fibula typically heals well with conservative management when the tibia is intact 1, 2. However, your patient's situation differs because:

1. Symptomatic non-union after one month suggests mechanical instability requiring protection
2. Partial weight-bearing reduces risk of further displacement, pain exacerbation, and potential complications 3
3. Complete non-weight-bearing is unnecessary since the tibia remains intact and can support load 2

Research on isolated fibular fractures demonstrates that immediate weight-bearing protocols can be safe when ankle stability is confirmed 2. However, this applies to acute fractures with intact medial structures—not established non-unions with persistent pain.

Evidence on Fibular Non-Union

Recent systematic reviews reveal that fibular non-union occurs in approximately 21% of tibial shaft fractures 4, with distal third fractures showing higher rates (25%) 4. Most symptomatic non-unions ultimately require surgical intervention 5, with surgical treatment showing favorable healing rates 1, 5.

Key point: Your patient's persistent pain after one month strongly suggests she will likely need surgical fixation. The non-union won't heal with continued unrestricted walking 1.

Clinical Pitfalls to Avoid

1. Don't allow unrestricted weight-bearing despite the fibula being "non-essential"—the persistent pain indicates mechanical problems that will worsen with full loading
2. Don't delay orthopaedic referral—symptomatic fibular non-unions rarely resolve conservatively and early surgical intervention (when indicated) improves outcomes 1, 5
3. Don't assume the tibia is unaffected—obtain weight-bearing radiographs of the entire leg to rule out tibial pathology or ankle instability 3

What to Tell Your Patient

"You can walk using crutches or a walker to take some weight off your leg, but you shouldn't put your full weight on it. The old fracture in your fibula hasn't healed properly, and the pain you're experiencing means it needs protection until the orthopaedic surgeon evaluates whether you need surgery. Most people with this problem end up needing a procedure to help the bone heal, but the surgeon will make that determination."

Before Orthopaedic Consultation

• Ensure bilateral weight-bearing ankle radiographs are available (if not already done) to assess for ankle instability 3
• Document pain severity, location, and functional limitations
• Note any neurovascular symptoms or skin changes
• Expedite the orthopaedic appointment—symptomatic non-unions benefit from earlier intervention 1

The evidence consistently shows that while complete immobilization isn't necessary for fibular issues when the tibia is intact, protected partial weight-bearing with assistive devices represents the safest middle ground 3, 6, 7 until definitive treatment planning occurs.