Tibia Shaft Fractures — Compartment Risk

Tibial shaft fractures are among the most common long bone fractures encountered in orthopaedic practice. The tibia is particularly vulnerable to injury because of its subcutaneous location along the anterior aspect of the leg. These fractures commonly occur following high-energy trauma such as road traffic accidents but may also occur due to sports injuries or low-energy falls.

One of the most important complications associated with tibial shaft fractures is acute compartment syndrome of the leg. Due to the tight fascial compartments of the leg, swelling following trauma can rapidly increase intracompartmental pressure and compromise tissue perfusion. If not recognized early, compartment syndrome may result in irreversible muscle necrosis, nerve injury, and permanent disability.

Prompt recognition and management of compartment syndrome are therefore essential components of tibial shaft fracture care. Orthopaedic surgeons must maintain a high index of suspicion, especially in high-energy injuries.

The tibia is the primary weight-bearing bone of the leg. It extends from the knee joint proximally to the ankle joint distally and provides structural support for the lower limb.

• Triangular cross-sectional shape
• Anterior border is subcutaneous
• Medial surface lacks significant soft tissue coverage
• Blood supply from nutrient artery and periosteal vessels

Because of limited soft tissue coverage, tibial fractures are frequently associated with open injuries.

The leg contains four fascial compartments that may develop increased pressure following trauma.

Compartment syndrome occurs when increased pressure within these compartments compromises blood flow to muscles and nerves.

• Road traffic accidents
• Sports injuries
• Falls from height
• Direct blow to leg
• Twisting injuries

High-energy injuries often result in comminuted fractures and extensive soft tissue damage.

Tibial shaft fractures are commonly classified using the AO/OTA system.

• Pain and swelling in leg
• Deformity of the limb
• Inability to bear weight
• Possible open wound
• Tenderness over fracture site

Acute compartment syndrome is a surgical emergency. It occurs when intracompartmental pressure rises to a level that compromises tissue perfusion.

• Most common after tibial shaft fractures
• Can occur after crush injuries
• May develop following reperfusion injury

• Severe pain out of proportion to injury
• Pain on passive stretch
• Paresthesia
• Paralysis (late sign)
• Pulselessness (very late sign)

Pain on passive stretching of muscles within the affected compartment is one of the earliest and most reliable clinical signs.

• Primarily clinical diagnosis
• Measurement of compartment pressures if uncertain
• Delta pressure less than 30 mmHg indicates compartment syndrome

Immediate fasciotomy is required to relieve compartment pressure.

• Emergency surgical decompression
• Two-incision four-compartment fasciotomy
• Wound left open initially
• Delayed closure or skin grafting

• Compartment syndrome
• Nonunion
• Malunion
• Infection
• Chronic pain

• Tibia is the most common long bone fracture associated with compartment syndrome
• Pain on passive stretch is an early sign
• Emergency fasciotomy is the definitive treatment
• AO classification type 42