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Segmental Fracture – Causes, Symptoms & Treatment

A segmental fracture is a bone break in which a segment of bone is completely isolated by two separate fracture lines. It is a serious injury that often requires surgical treatment.

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Things worth knowing about "Segmental fracture"

A segmental fracture is a bone break in which a segment of bone is completely isolated by two separate fracture lines. It is a serious injury that often requires surgical treatment.

What is a Segmental Fracture?

A segmental fracture is a specific type of bone fracture in which a section of bone – known as the bone segment – is completely separated from the rest of the bone by two distinct fracture lines. The middle fragment is broken at both ends and has no direct connection to the adjacent parts of the bone. This type of fracture is considered a complex and severe bone injury.

Causes

Segmental fractures typically result from significant direct or indirect forces applied to the bone. Common causes include:

High-energy trauma such as road traffic accidents, falls from height, or sports injuries
Direct impact to the affected bone area
Gunshot wounds, where the shockwave fractures the bone at multiple points
Pathological fractures in weakened bone, for example due to osteoporosis or bone tumors, where less force is required to cause a fracture

Symptoms

The symptoms of a segmental fracture are similar to those of other severe bone fractures but may be more pronounced due to the complexity of the injury:

Severe pain at the site of injury, worsening with movement
Swelling and bruising around the fracture site
Visible deformity or abnormal alignment of the affected limb
Restricted or lost ability to move the affected limb or joint
Crepitation (a grinding sensation) occasionally felt with movement
In open fractures: open wounds and exposed bone fragments
Possible associated injuries to nerves and blood vessels

Diagnosis

Diagnosis of a segmental fracture is made through a combination of clinical examination and imaging studies:

X-ray: The standard method for identifying bone fractures; in a segmental fracture, both fracture lines and the isolated bone segment are visible.
Computed Tomography (CT): Provides detailed three-dimensional images and is particularly useful for assessing the exact position of bone fragments in complex fractures.
Magnetic Resonance Imaging (MRI): Used when additional soft tissue, ligament, or vascular injuries are suspected.
Angiography: Performed when vascular injury in the affected area is suspected.

Treatment

Due to the complexity of a segmental fracture, surgical treatment is required in the majority of cases. The goal is to restore bone alignment and enable stable healing.

Conservative Treatment

In rare cases, particularly for stable and minimally displaced fractures, conservative management with cast immobilization or splinting may be considered. However, this is the exception rather than the rule for segmental fractures.

Surgical Treatment

Surgical intervention is usually necessary and may include:

Intramedullary nailing: A metal nail is inserted into the medullary canal of the bone to stabilize the fragments. This method is commonly used for long bones such as the femur or tibia.
Plate osteosynthesis: Metal plates and screws are used to fix the bone fragments in place.
External fixation: An external frame of metal rods and pins inserted through the skin into the bone, often used as temporary stabilization for open or heavily contaminated fractures.
Bone grafting: In cases where the blood supply to the middle fragment is compromised, a bone graft may be necessary to support healing.

Post-Treatment and Rehabilitation

After surgical treatment, intensive rehabilitation is required. This includes physiotherapy to restore muscle strength and joint mobility, a gradual return to weight-bearing activity, and regular X-ray follow-up examinations. Healing time can range from several months, depending on the severity of the injury and the general health of the patient.

Possible Complications

Segmental fractures can be associated with a range of complications:

Compromised blood supply to the isolated bone segment, with the risk of avascular necrosis (bone tissue death)
Delayed bone healing or non-union (pseudarthrosis)
Infection, particularly in the case of open fractures
Nerve and vascular damage caused by bone fragments or the original trauma
Malunion resulting in permanent deformity or limb length discrepancy

References

Müller, M.E. et al. – The Comprehensive Classification of Fractures of Long Bones. Springer Verlag, 1990.
Rockwood, C.A. & Green, D.P. – Rockwood and Green's Fractures in Adults. 9th edition, Wolters Kluwer, 2020.
Court-Brown, C.M. et al. – Rockwood and Green's Fractures in Adults, Chapter on Segmental Fractures. 9th edition, Wolters Kluwer, 2020.

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