Recommended Splint for Calcaneal Fracture
For calcaneal fractures, immobilization with a cast or fixed-ankle walker-type device is recommended, with specific attention to tongue-type fractures which require immediate plantarflexion splinting to prevent posterior skin compromise. 1
Initial Management Approach
The splinting strategy depends critically on the fracture pattern and soft tissue status:
For Simple, Non-Displaced Fractures
- Use an immobilization cast or fixed-ankle walker device 1
- This applies when fracture fragments are small, non-articular, or minimally displaced
- The goal is protecting and immobilizing the foot to facilitate healing
For Tongue-Type Fractures (Critical)
Tongue-type calcaneal fractures require immediate plantarflexion splinting to prevent posterior skin breakdown 2, 3. This is a time-sensitive emergency:
- 21% of tongue-type fractures develop posterior skin compromise 3
- Threatened skin that receives emergent percutaneous reduction does not progress to breakdown 3
- Failure to recognize this within hours can convert a closed fracture to an open one 2
Red flags requiring immediate plantarflexion splinting:
- Posterior tuberosity displacement
- Visible skin tenting posteriorly
- Smoking history (increases risk)
- High-energy mechanism (motor vehicle crash vs. fall)
- Delayed presentation 3
For Displaced Intra-Articular Fractures
- Initial immobilization with cast or walker device 1
- Definitive treatment decision (surgical vs. non-surgical) should be made promptly
- If surgical treatment planned, splinting serves as temporary stabilization until swelling resolves
Critical Pitfalls to Avoid
Do not use a neutral ankle position splint for tongue-type fractures - this allows continued posterior displacement and skin compromise. The plantarflexion position is essential to reduce pressure on posterior soft tissues 2, 3.
Monitor all calcaneal fractures closely for:
- Blue, purple, or pale extremity (indicates vascular compromise requiring immediate emergency activation) 4
- Progressive swelling within the splint
- Development of skin breakdown, particularly posteriorly in tongue-type patterns
Splinting Technique Considerations
When applying any splint for calcaneal fractures:
- Splint in the position found unless straightening is necessary for safe transport 4, 5, 4
- Cover any open wounds with clean dressing before splinting 4
- Ensure adequate padding to prevent pressure sores
- The splint should immobilize the ankle joint and foot
The American College of Foot and Ankle Surgeons guidelines emphasize that simple immobilization is appropriate for non-displaced fractures, while more complex patterns require subspecialist evaluation 1. However, initial splinting should never be delayed while awaiting definitive surgical planning, as proper immobilization prevents further soft tissue injury and facilitates subsequent treatment.