In a patient with a trimalleolar ankle fracture treated with an external fixator, should standard ankle radiographs be obtained at the 2‑week postoperative visit while awaiting healing of fracture blisters before definitive open reduction internal fixation (ORIF)?

Radiographs at 2-Week Follow-Up After External Fixation for Trimalleolar Ankle Fracture

Yes, obtain standard three-view ankle radiographs (AP, lateral, and mortise) at the 2-week postoperative visit to assess fracture alignment and external fixator position before proceeding to definitive ORIF.

Rationale for Imaging

While the provided ACR guidelines 1 focus primarily on initial trauma imaging rather than postoperative follow-up protocols, the clinical context of your scenario demands imaging for several critical reasons:

Key Clinical Considerations

External fixation is a temporary stabilization measure, not definitive treatment. During the 2-week interval waiting for fracture blisters to heal:

• Fracture displacement can occur through the external fixator, particularly in trimalleolar fractures which are inherently unstable 1
• Pin loosening or migration may compromise fracture stability
• Assessment of fracture position is essential for surgical planning before definitive ORIF

Evidence on Postoperative Imaging Timing

The research evidence addresses a different clinical scenario than yours—specifically questioning the utility of routine radiographs after definitive internal fixation 2, 3, 4, 5. These studies found:

• Immediate post-ORIF radiographs add minimal value when good intraoperative fluoroscopy is obtained 2, 3
• Routine 3-week radiographs after definitive fixation rarely change management 4
• Early postoperative films (7-21 days) after ORIF don't reduce complications compared to delayed imaging 5

However, these findings do NOT apply to your situation because:

1. Your patient has temporary external fixation, not definitive internal fixation
2. The 2-week visit is a critical decision point for timing definitive surgery
3. You need to confirm the fracture remains reducible and hasn't displaced significantly

Recommended Imaging Protocol

Obtain standard three-view ankle radiographs (anteroposterior, lateral, and mortise views) 1:

• Assess fracture alignment through the external fixator
• Evaluate for any displacement that occurred during the temporizing period
• Confirm external fixator pin position and rule out loosening
• Document baseline alignment before definitive ORIF planning

Important Caveats

• Image quality will be suboptimal due to overlying external fixator hardware—this is expected and acceptable
• The goal is not perfect visualization but rather confirmation that gross alignment is maintained
• Clinical examination remains paramount: assess soft tissue condition, fracture blister healing, and neurovascular status

Surgical Planning Considerations

At this 2-week visit, you're determining:

• Readiness for definitive ORIF based on soft tissue healing
• Surgical approach planning based on current fracture position
• Whether additional temporizing measures are needed if blisters haven't adequately healed

Trimalleolar fractures have increased instability with higher complication rates 1, making interval assessment particularly important before committing to definitive fixation timing.

Clinical Algorithm

1. Obtain three-view radiographs at 2-week follow-up
2. Assess soft tissue condition (fracture blisters, swelling, skin integrity)
3. If blisters healed AND alignment maintained: proceed to ORIF
4. If blisters not healed BUT alignment maintained: continue external fixation, recheck in 3-7 days
5. If significant displacement occurred: consider earlier ORIF if soft tissues permit, or adjust external fixator

The cost of radiographs (~$200) 2 is negligible compared to the risk of proceeding to definitive surgery with unrecognized displacement or planning inadequately for a fracture that has shifted position.