What is the recommended evaluation and management of a calcaneal fracture?

Management of Calcaneal Fractures

Initial Evaluation

Obtain three-view radiographs (AP, lateral, and axial views) as the first-line imaging study for any suspected calcaneal fracture. 1

Clinical Assessment

• Evaluate for traumatic mechanism (typically fall from height or high-energy axial load) 2
• Assess ability to bear weight, which is a significant clinical finding 3
• Examine for plantar ecchymosis, midfoot swelling, and heel deformity 1
• Check for compartment syndrome, which requires emergency fasciotomy 4
• Document neurovascular status of the foot 4

Advanced Imaging

• CT scan without contrast is mandatory for all displaced intra-articular fractures to guide treatment planning and classify fracture patterns. 2
• CT allows visualization of subtalar joint involvement, fragment displacement, and calcaneocuboid joint extension 2
• MRI is reserved for persistent pain with negative radiographs to evaluate occult fractures 1

Fracture Classification

Intra-articular vs Extra-articular

• Intra-articular fractures involve the subtalar joint (75% of calcaneal fractures) 2
• Extra-articular fractures spare the subtalar joint and include anterior, middle, and posterior calcaneal body fractures 2

Sanders Classification (for intra-articular fractures)

• Use CT-based Sanders classification as it correlates with clinical outcomes and guides surgical decision-making 2
• Type II and III fractures comprise the majority of operative cases 5

Management Algorithm

Non-Displaced or Minimally Displaced Fractures

• Immobilize in a below-knee splint or boot with strict non-weight bearing for 8-12 weeks. 3, 6
• Provide crutches or assistive devices 3
• Prescribe adequate analgesia with opioids as primary agent, adding scheduled acetaminophen 3
• Elevate the extremity to minimize swelling 3

Displaced Intra-articular Fractures

Surgical treatment with open reduction and internal fixation (ORIF) may improve functional outcomes, reduce chronic pain, and enhance physical quality of life compared to non-operative management, though it increases the risk of wound complications. 7

Evidence for Surgical Management

• Surgery improves AOFAS scores by 6.58 points at 6-24 months (clinically meaningful improvement) 7
• Surgery reduces chronic pain by 295 per 1000 patients compared to conservative treatment 7
• Physical quality of life scores improve by 6.49 points with surgery 7
• Anatomic reconstruction of calcaneal shape and joint surfaces is mandatory for good functional results 8, 9, 4

Surgical Approach Selection

• Use the sinus tarsi approach for most displaced intra-articular fractures as it achieves anatomic reduction with lower wound complication rates than extensile lateral approaches. 8, 5
• Extend along the "lateral utility" line for calcaneocuboid joint involvement or fracture-dislocations 8
• Fixation with 3.5mm cortical screws achieves 72% of reductions with <2mm step-off 5
• Reserve extended lateral approach for complex fracture patterns requiring extensive exposure 4

Surgical Timing

• Perform surgery within 14 days of injury; delayed reduction beyond this period adversely affects outcomes 4
• Treat open fractures and compartment syndrome as surgical emergencies 4
• Wait for soft tissue swelling to resolve before elective ORIF 4

Intraoperative Quality Control

• Verify anatomic reduction with high-resolution fluoroscopy, Brodén views, or subtalar arthroscopy 4
• Ensure posterior facet step-off is <2mm 5
• Restore Böhler's angle and Gissane angle to normal values 5

Displaced Extra-articular Fractures

• Treat with percutaneous screw fixation for adequate fracture control. 8
• Simple extra-articular fractures may be managed non-operatively with immobilization 8

Postoperative Management

Weight-Bearing Protocol

• Maintain strict non-weight bearing for 8-12 weeks postoperatively, though 96% of surgeons interpret this guideline flexibly based on patient factors. 6
• 87% of surgeons report no relation between early weight-bearing and complications including hardware loosening 6
• Initiate weight-bearing based on patient complaints, fracture healing on imaging, and patient compliance 6

Rehabilitation

• Provide elevation and ice to minimize swelling 1
• Prescribe adequate analgesia for home use 3
• Arrange orthopedic follow-up within 3-5 days of discharge 3

Complications and Their Management

Surgical Complications (Low-certainty Evidence)

• Superficial site infection occurs in 14% of surgical patients 7
• Deep infection requiring debridement occurs in 5.3% 7
• Implant removal needed in 3.4% 7
• Amputation required in 2.4% 7

Late Complications

• Subtalar arthrodesis rates show no significant difference between surgical and non-surgical treatment (RR 0.38,95% CI 0.09-1.53). 7
• Malunited fractures result in painful arthritis and three-dimensional foot deformities requiring corrective procedures 9, 4
• Primary anatomic reconstruction facilitates easier in situ fusion if subtalar arthritis develops 9

Prognostic Factors

Favorable Outcomes

• Anatomic reduction of joint congruity and overall calcaneal shape 4
• Surgery within 14 days of injury 4
• Closed fractures 4

Adverse Outcomes

• Open fractures 4
• High body mass index 4
• Smoking 3, 4
• Failed anatomic reconstruction combining disadvantages of both operative and non-operative treatment 9

Return to Work

• No significant difference in return to work rates between surgical and non-surgical treatment (RR 1.26,95% CI 0.94-1.68) 7