High Yield Overview

EXTENDED ILIOFEMORAL - SINGLE INCISION TOTAL ACCESS

Both Columns via One Approach | Trochanteric Osteotomy | Extensive Exposure

Critical Extended Iliofemoral Approach Exam Points

Trochanteric Osteotomy

Greater trochanter osteotomy is mandatory for this approach. It must be adequately large (include vastus ridge), rigidly fixed at closure (wires plus screws or cable plate), and protected post-operatively to heal. Nonunion or migration occurs in 5-10% despite best technique.

Heterotopic Ossification

Highest HO risk of any approach - 40-60% incidence without prophylaxis. Extensive soft tissue stripping and muscle trauma cause ectopic bone formation. Prophylaxis with indomethacin AND radiation may be needed. Can severely limit hip motion.

Sciatic Nerve at Risk

Just as in Kocher-Langenbeck, the sciatic nerve is at significant risk. Identify early, protect throughout, repair external rotators. Extended dissection increases nerve injury risk compared to isolated K-L approach.

Single Incision Advantage

The main advantage is 360-degree acetabular access through one incision, avoiding need for patient repositioning. However, this comes at cost of extensive soft tissue trauma, high complication rates, and prolonged surgery. Most surgeons now prefer two separate approaches.

Extended Iliofemoral vs Staged Two-Incision Approach

Mnemonic

EXTENDEDEXTENDED - Key Features of Approach

Memory Hook:EXTENDED approach is exactly that - extended exposure with extended complications and extended recovery

Mnemonic

OSTEOTOMYOSTEOTOMY - Trochanteric Fixation Essentials

Memory Hook:OSTEOTOMY fixation is as important as fracture fixation - nonunion causes major morbidity

Mnemonic

PROPHYLAXISPROPHYLAXIS - HO Prevention Critical

Memory Hook:PROPHYLAXIS for HO is non-negotiable in extended iliofemoral approach - the complication rate is too high without it

Overview and Historical Context

The extended iliofemoral approach was described by Emile Letournel as the most extensile approach to the acetabulum, providing 360-degree access through a single incision. It combines elements of both the ilioinguinal and Kocher-Langenbeck approaches.

Historical development:

Letournel (1960s-1970s): Described for complex both-column fractures
Original indication: Avoid two separate incisions and patient repositioning
Peak use (1980s-1990s): Widely adopted for both-column fractures
Modern trend: Declining use in favor of staged two-incision approaches

Why use has declined:

Very high complication rates: HO 40-60%, nerve injury 15-20%, trochanteric nonunion 5-10%
Steep learning curve: Requires expertise in both anterior and posterior pelvic surgery
Better alternatives: Staged two-incision approaches have lower morbidity
Improved perioperative care: Two separate surgeries no longer as problematic

When Extended Iliofemoral Still Has a Role

The extended iliofemoral approach still has selective indications: (1) Both-column fractures in young patients where anatomic reduction is critical and surgeon has extensive experience with the approach, (2) Complex T-type fractures requiring extensive anterior and posterior exposure, (3) Revision surgery after failed prior fixation where access to both columns needed. Most surgeons now reserve it for specific cases rather than routine use.

Current indications:

Both-column fractures (alternative to two-incision)
Complex T-type fractures
Anterior column + posterior hemitransverse
Revision surgery requiring both column access
Typically reserved for surgeons with extensive pelvic surgery experience

Anatomy

The extended iliofemoral approach combines the ilioinguinal and Kocher-Langenbeck approaches through a single lateral incision with trochanteric osteotomy.

Key anatomical access:

Anterior column: Accessed via lateral window (iliac wing) and anterior reflection
Posterior column: Accessed via posterior reflection after trochanteric osteotomy
Pelvic brim: Visible through middle exposure
Quadrilateral surface: Accessible but limited compared to Stoppa

Critical structures:

Structures at Risk - Extended Iliofemoral

Trochanteric osteotomy anatomy:

Must include vastus ridge laterally for adequate fixation surface
Preserves abductor mechanism attachment
Allows abductors to be reflected proximally, exposing posterior column
Typical thickness 1.5-2.0cm

Internervous Plane

No True Internervous Plane

Unlike the standard ilioinguinal or Kocher-Langenbeck approaches, the extended iliofemoral approach does NOT have a true internervous plane. The exposure requires a trochanteric osteotomy to elevate the abductor muscles (Gluteus Medius and Minimus, innervated by Superior Gluteal Nerve) and extensive soft tissue dissection.

Key Nervous Consideration: The approach combines elements of both anterior (ilioinguinal) and posterior (Kocher-Langenbeck) dissections. The internervous plane of the anterior component (between Femoral and Obturator nerve territories) is exploited, but the posterior component works through muscle rather than between nerve territories.

Indications and Patient Selection

Both-column fractures:

Complete articular dissociation from ilium
Spur sign present
Significant displacement of both columns requiring reduction
Young patients where anatomic reduction is critical

Complex T-type fractures:

Transverse component plus anterior stem
Significant displacement requiring anterior and posterior fixation

Anterior column + posterior hemitransverse:

High anterior column component
Posterior column extension

The extended iliofemoral provides complete access but at cost of high complications.

Positioning

Patient Position:

Lateral decubitus with affected side up
Secure with beanbag or pegboard
Entire limb prepped and draped free for manipulation

Setup Checklist:

C-arm: Position to allow inlet, outlet, and Judet views from below.
Surgeon: Stands facing the patient's back (like K-L approach).
Assistant: Opposite side for retraction.
Arm: Free or on arm board, away from surgical field.

Surgical Technique

Skin incision:

Extensive T-shaped or curved incision
Anterior limb along iliac crest from PSIS to ASIS
Posterior limb from greater trochanter distally along femur
Total length 25-35cm

Trochanteric osteotomy:

Osteotomy Technique

Step 1Mark Osteotomy

Include vastus ridge laterally for fixation surface Thickness 1.5-2.0cm Preserve soft tissue attachments to fragment

Step 2Perform Osteotomy

Use oscillating saw Oblique cut from proximal-lateral to distal-medial Protect abductor soft tissues attached to fragment

Step 3Reflect Abductors

Elevate trochanter with attached abductors proximally This exposes posterior hip capsule and column Tag osteotomy fragment for later repair

The trochanteric osteotomy is the key maneuver that allows complete posterior column access.

Complications

Complications - Extended Iliofemoral vs Other Approaches

Heterotopic Ossification Prophylaxis is Mandatory

The extended iliofemoral approach has the highest HO risk of any orthopaedic procedure at 40-60% without prophylaxis. Dual prophylaxis should be strongly considered: indomethacin 75mg daily for 6 weeks PLUS single-dose radiation 7-8 Gy within 72 hours. Some surgeons use both for extended iliofemoral given the catastrophic impact of severe HO on hip function. Even with prophylaxis, 10-20% develop some HO.

Postoperative Care

Recovery Protocol

Trochanteric ProtectionWeek 0-8

Toe-touch weight bearing only (protect osteotomy) Hip abduction exercises only (no active abduction) Passive ROM as tolerated Indomethacin 75mg daily for HO prophylaxis

Progressive LoadingWeek 8-12

X-rays to assess trochanteric healing Progress to partial weight bearing if healing Begin active abduction exercises Continue ROM

Advanced RehabilitationMonth 3-6

Full weight bearing when fracture and osteotomy healed Strengthening program Gait normalization Return to activities as tolerated

SurveillanceLong-term

Monitor for HO development (up to 18 months) Assess for trochanteric complications Hip arthroplasty consideration if severe arthritis develops

Extended recovery timeline:

Longer than other acetabular approaches
Trochanteric healing adds 8-12 weeks
Full recovery may take 12-18 months
Some patients never regain normal gait

Evidence Base

Letournel - Extended Iliofemoral Approach Description

Letournel E • Clin Orthop Relat Res (1993)

Clinical Implication: The extended iliofemoral remains an option for complex both-column fractures, but high complications limit modern use.

Limitation: Expert technique; outcomes highly dependent on surgeon experience and patient selection.

Helfet et al - Complications of Extended Iliofemoral

Helfet DL, et al • J Orthop Trauma (2006)

Clinical Implication: Given similar fracture outcomes but higher complication rates, staged two-incision approaches are preferred by most surgeons for both-column fractures.

Limitation: Retrospective comparison; selection bias toward complex fractures for extended approach.

Borrelli et al - Heterotopic Ossification After Acetabular Fracture

Borrelli J, et al • Clin Orthop Relat Res (2012)

Clinical Implication: Dual HO prophylaxis should be considered for extended iliofemoral approach given very high baseline risk. Approach selection should factor in HO burden.

Limitation: Multi-center retrospective study; prophylaxis protocols varied.

Exam Viva Scenarios

Practice these scenarios to excel in your viva examination

VIVA SCENARIOStandard

Scenario 1: Approach Selection for Both-Column Fracture

EXAMINER

"A 30-year-old male has a both-column acetabular fracture with significant displacement of both anterior and posterior columns. Your consultant asks whether you would use extended iliofemoral or staged two-incision approach. What factors guide your decision?"

EXCEPTIONAL ANSWER

For a both-column fracture, I have two main surgical options: extended iliofemoral (single incision) or staged two-incision approach (Kocher-Langenbeck plus ilioinguinal or Stoppa). My decision would be guided by several factors: First, **patient factors** - age (younger patients tolerate complications better), functional demands (high-functioning patients benefit from anatomic reduction), medical fitness (prolonged surgery with extended approach), and ability to comply with prolonged rehabilitation. Second, **fracture factors** - complexity of reduction needed (extremely complex patterns may benefit from 360-degree access), chronicity (delayed fractures may need extensive exposure), and previous surgery (revision may require extensile approach). Third, **surgeon factors** - my experience level (extended iliofemoral has very steep learning curve), availability of experienced assistant for two-team simultaneous approach, and institutional support (radiation for HO prophylaxis). Fourth, **complication considerations** - extended iliofemoral has 40-60% HO risk vs 20-30% for two-incision, requires trochanteric osteotomy with 5-10% nonunion risk, and has 10-15% superior gluteal nerve injury vs 2-5% for K-L alone. **For this patient**, I would likely recommend **staged two-incision approach**: Kocher-Langenbeck for posterior column first (patient lateral), then 3-5 days later ilioinguinal or Stoppa for anterior component (patient supine). This has lower overall morbidity, avoids trochanteric osteotomy, and is within my expertise level. I would only consider extended iliofemoral if I had extensive experience with the approach or if there were specific fracture features requiring 360-degree access that I couldn't achieve with two separate approaches.

VIVA SCENARIOChallenging

Scenario 2: Trochanteric Osteotomy Nonunion

EXAMINER

"Six months after an extended iliofemoral approach, the patient returns with lateral hip pain and a limp. X-rays show the acetabular fracture has healed well, but the trochanteric osteotomy has not united and has migrated proximally 2cm. How do you manage this?"

EXCEPTIONAL ANSWER

This patient has developed **trochanteric nonunion with proximal migration** - a known complication occurring in 5-10% of trochanteric osteotomies. This causes abductor weakness (Trendelenburg gait), lateral hip pain from nonunion, and functional impairment. My assessment would include: history of pain severity and functional limitation, examination for Trendelenburg sign and abductor strength, imaging with AP pelvis and Judet views to assess migration distance and acetabular fracture healing. Management options depend on symptoms and migration: **Option 1 - Non-operative** (if minimally symptomatic): Accept the nonunion, focus on physiotherapy to strengthen residual abductors and compensatory mechanisms, use walking aids if needed, patient education about permanent limp. This is reasonable for elderly or low-demand patients. **Option 2 - Surgical revision** (if significantly symptomatic): Indications include severe pain, marked functional impairment, young active patient. Technique: lateral approach to trochanter, identify migrated fragment, mobilize and reduce to anatomic position, rigid refixation with cable plate system or multiple screws, bone graft nonunion site if needed. Post-op: protected weight-bearing 8-12 weeks until union. **For this 30-year-old patient** at 6 months post-op, I would recommend **surgical revision** because: young age and likely high functional demands, 2cm migration represents significant abductor dysfunction, fracture is healed so safe to proceed, and quality of life impact is likely substantial. I would counsel about: second surgery risks, prolonged recovery (another 3-6 months), some patients never regain normal gait even after successful revision, and this is a known risk of the extended iliofemoral approach that contributes to why many surgeons now prefer two-incision techniques.

VIVA SCENARIOCritical

Scenario 3: Severe Heterotopic Ossification

EXAMINER

"Eighteen months after extended iliofemoral approach for a both-column fracture, the patient has developed severe heterotopic ossification (Brooker Grade IV) with complete ankylosis of the hip. The acetabular fracture healed anatomically. What are the management options?"

EXCEPTIONAL ANSWER

This patient has developed **Brooker Grade IV heterotopic ossification** - complete bony ankylosis of the hip - the most severe form of HO. This is a devastating complication that unfortunately occurs in 5-10% of extended iliofemoral cases even with prophylaxis (40-60% without prophylaxis). The irony is that the fracture healed well, but HO has eliminated hip function. My assessment would include: full history of HO prophylaxis (was it given?), pain level (some ankylosed hips are painless), functional limitation (wheelchair vs ambulatory with aids), patient's age and demands, imaging with CT to assess extent of HO and location, and bone scan to confirm HO is mature (cold scan indicates maturation complete). Management options: **Option 1 - Observation**: If painless and patient has adapted, observation is reasonable. Some patients with hip ankylosis can function surprisingly well, especially if younger with good lumbar spine. However, lumbar strain and degeneration accelerate. **Option 2 - HO excision + prophylaxis**: Indications: painful ankylosis, significant functional limitation, patient motivated for surgery. Timing: must wait until HO fully mature (12-18 months, bone scan cold). Technique: excise ectopic bone through original approach, may need to re-osteotomize trochanter, aggressive excision to restore motion, CRITICAL - dual prophylaxis essential (indomethacin 75mg x 6 weeks PLUS radiation 7-8 Gy immediately post-op). Post-op: aggressive physiotherapy to maintain motion. Results: 60-70% achieve functional ROM, but 30-40% re-form HO. **Option 3 - Total hip arthroplasty**: If excision fails or HO recurs, THA may be needed. Technically challenging due to scarring and anatomy distortion, but can restore function. **For this patient**, I would offer **HO excision with dual prophylaxis** if: motivated for surgery, physically able to undergo procedure and intensive rehab, understands 30-40% recurrence risk despite best efforts. I would counsel that this is a **preventable complication** - extended iliofemoral approach has the highest HO risk in orthopaedics, prophylaxis was either not given or insufficient, and this outcome illustrates why most surgeons now prefer two-incision approaches for both-column fractures.

MCQ Practice Points

Trochanteric Osteotomy Requirement

Q: Why is trochanteric osteotomy mandatory in the extended iliofemoral approach? A: The osteotomy allows the abductor muscles to be reflected proximally with the trochanter, providing access to the posterior column and posterior acetabulum. Without this, the approach cannot achieve 360-degree acetabular exposure. The osteotomy must include the vastus ridge for adequate fixation.

Heterotopic Ossification Risk

Q: What is the incidence of heterotopic ossification with extended iliofemoral approach and how is it prevented? A: Extended iliofemoral has the highest HO risk of any orthopaedic procedure at 40-60% without prophylaxis. Prevention requires dual prophylaxis: indomethacin 75mg daily for 6 weeks PLUS single-dose radiation 7-8 Gy within 72 hours. Even with prophylaxis, 10-20% develop some HO.

Approach Selection

Q: What is the primary indication for extended iliofemoral approach vs staged two-incision approach for both-column fractures? A: Extended iliofemoral provides 360-degree acetabular access through single incision avoiding patient repositioning. However, most surgeons now prefer staged two-incision approaches due to lower complications (20-30% HO vs 40-60%, no trochanteric osteotomy, lower nerve injury). Extended iliofemoral reserved for complex cases by experienced surgeons.

Trochanteric Fixation

Q: What are the fixation options for trochanteric osteotomy and why is rigid fixation important? A: Options include: (1) tension band wiring, (2) wires plus lag screws, (3) cable plate system. Rigid fixation is critical because nonunion occurs in 5-10% despite best technique, causing abductor weakness, Trendelenburg gait, and pain. Cable plate systems provide most rigid fixation with lowest failure rate.

Modern Trend

Q: Why has the use of extended iliofemoral approach declined in recent decades? A: The approach has very high complication rates (40-60% HO, trochanteric nonunion 5-10%, superior gluteal nerve injury 10-15%) with no improvement in fracture outcomes compared to staged two-incision approaches. Modern surgeons prefer lower-morbidity alternatives that achieve similar reduction quality. Extended iliofemoral now reserved for select cases.

Australian Context

Trauma Centre Referral: Complex acetabular fractures requiring the extended iliofemoral approach are typically managed at Level 1 trauma centres with subspecialty pelvic trauma expertise. The Australian Trauma Quality Improvement Program (AusTQIP) promotes centralisation of such cases.

HO Prophylaxis Guidelines: Indomethacin 75mg daily for 6 weeks or single-dose radiation (7-8 Gy) is standard practice. PBS subsidisation of indomethacin makes pharmacological prophylaxis accessible.

Transfusion Considerations: Australian Red Cross Blood Service guidelines apply. Cell salvage is routinely used for major pelvic surgery. Massive transfusion protocols are available at trauma centres.

Rehabilitation Pathway: Extended recovery requiring 6-8 weeks protected weight bearing, with rehabilitation coordinated through hospital-based physiotherapy and transition to community services.