Pelvic Fractures

Modern Study Review (AI-Generated)

High-Yield Summary

Pelvic fractures represent a spectrum of injuries ranging from stable avulsion fractures to complex unstable ring disruptions with significant morbidity and mortality. Understanding the biomechanical stability and classification of pelvic fractures is critical for guiding management and predicting outcomes. Modern care emphasizes early hemorrhage control, accurate classification, and tailored operative or non-operative treatment to optimize pain relief and restore function.

Key Diagnostic Findings

Anatomy

The pelvis consists of the sacrum, coccyx, and paired innominate bones (ilium, ischium, pubis) forming a ring structure.
Stability depends on the integrity of the anterior and posterior pelvic rings, including ligaments such as the sacroiliac and pubic symphysis ligaments.

Clinical Presentation

Patients may present with pelvic pain, deformity, hemodynamic instability, and associated injuries (e.g., urogenital, vascular).
Mechanism often involves high-energy trauma (e.g., MVC, falls).
Physical exam includes assessment of pelvic stability, neurovascular status, and signs of hemorrhage.

Imaging

Initial evaluation with AP pelvis radiograph and inlet/outlet views.
CT scan is the gold standard for detailed fracture characterization and surgical planning.
Angiography may be necessary for ongoing hemorrhage.

Classification Systems

Classification	Description	Notes
Tile Classification (1988)	Based on stability: A (stable), B (rotationally unstable, vertically stable), C (rotationally and vertically unstable)	Widely used; guides treatment
Young-Burgess Classification	Based on mechanism: Lateral Compression, Anteroposterior Compression, Vertical Shear, Combined	Complements Tile by mechanism
OTA/AO Classification (Updated)	Comprehensive system incorporating fracture morphology and stability	Increasingly used in research and practice

Current Gold Standard Treatment

Non-operative Indications

Stable fractures (Tile A), minimal displacement, no neurovascular compromise.
Hemodynamically stable patients without posterior ring disruption.
Early mobilization with pain control and physical therapy.

Operative Indications

Unstable fractures (Tile B and C), especially with vertical instability or posterior ring disruption.
Persistent hemodynamic instability despite resuscitation.
Open fractures, associated neurovascular injury, or failed non-operative management.
Surgical options include external fixation, percutaneous screw fixation, and open reduction internal fixation (ORIF) depending on fracture pattern.

Modern Complications & Outcomes

Complications

Hemorrhagic shock and exsanguination (early mortality risk).
Neurovascular injury (sciatic nerve, lumbosacral plexus).
Infection, nonunion, malunion, chronic pain, and pelvic instability.
Urogenital injuries and sexual dysfunction.

Outcomes

Early stabilization improves survival and functional outcomes.
Long-term pain and gait abnormalities correlate with fracture severity and quality of reduction.
Multidisciplinary care including orthopaedics, trauma surgery, and rehabilitation optimizes recovery.

Classic Clinical Notes

Pelvic Fractures (Tile, 1988)

A-Stable
B-Rotationally unstable; vertically and posteriorly stable
C-Rotationally, posteriorly and vertically unstable

A-Stable

A1-Fractures not involving ring, avulsion injuries

A1.1-Anterior superior spine

A1.2-AIIS

A1.3-Ischial Tuberosity

A2-Stable, minimal displacement

A2.1-Iliac wing fractures

A2.2-Isolated anterior ring injuries (four pillar)

A2.3-Stable, undisplaced, or minimally displaced pelvic ring #

A3-Transverse # of sacrum and coccyx

A3.1-Undisplaced transverse sacral #

A3.2-Displaced transverse sacral

A3.3-Coccygeal #

B-Rotationally unstable; vertically and posteriorly stable

B1-External rotation instability; open book injury

B1.1-Unilateral injury

B1.2- [Incomplete in original notes]

Last Updated on January 25, 2026 by orthonet