Hip - Lateral Approach

Modern Study Review (AI-Generated)

High-Yield Summary

The Lateral (Hardinge) Approach to the hip is a time-tested, widely adopted technique primarily used for total hip arthroplasty and acetabular exposure. It offers excellent visualization of the proximal femur and acetabulum but requires splitting the gluteus medius muscle, which may compromise abductor function postoperatively. While still considered a gold standard in many centers, this approach is increasingly supplemented or replaced by minimally invasive or muscle-sparing techniques to reduce soft tissue trauma and improve early functional recovery.

Applied Anatomy & Intervals

Internervous Interval

None: This approach does not follow a true internervous plane; it involves a longitudinal split of the gluteus medius muscle fibers.

Anatomic Landmarks

Greater Trochanter (GT): Central reference point for the incision.
Tensor Fascia Lata (TFL): Retracted anteriorly.
Gluteus Maximus (GMax): Retracted posteriorly.
Gluteus Medius (GMed): Split longitudinally in line with fibers.
Vastus Lateralis: Split to create an anterior flap with the anterior portion of GMed.

Patient Positioning & Setup

Table Type: Standard orthopedic or radiolucent table.
Patient Position: Supine or lateral decubitus, depending on surgeon preference and case specifics.
Specialized Equipment:
Limb positioners or traction devices as needed.
C-arm fluoroscopy positioned for intraoperative imaging of the acetabulum and proximal femur.

Surgical Technique (The “Vital Steps”)

Incision & Superficial Dissection

Make a 15 cm longitudinal incision centered over the greater trochanter.
Incise subcutaneous fat and deep fascia in line with the skin incision.
Retract the TFL anteriorly and GMax posteriorly to expose the gluteus medius.

Deep Dissection & Exposure

Split the gluteus medius fibers longitudinally at the mid-portion of the greater trochanter.
Split vastus lateralis fibers to develop an anterior flap with the anterior gluteus medius.
Detach muscles subperiosteally from the greater trochanter, optionally with a bone flap for secure reattachment.
Detach the gluteus minimus with a flap to expose the hip capsule.
Perform a T-shaped capsulotomy to expose the femoral neck.
Osteotomize the femoral neck and extend the capsulotomy as needed.
Remove the femoral head and complete acetabular exposure.

The “Danger Zone”

Structure	Location & Risk	Protection Strategy
Superior Gluteal Nerve (SGN)	Runs between GMed and GMin 3-5 cm proximal to GT; risk during proximal dissection	Avoid dissection above GT; use gentle retraction
Femoral Nerve	Vulnerable to retractors placed too medially or deeply	Place retractors carefully; avoid deep medial placement
Transverse Branch of Lateral Femoral Circumflex Artery	May be transected during vastus lateralis mobilization	Identify early; ligate or cauterize vessel

Post-Operative Pearl

Limit active hip abduction and weight-bearing initially to protect the split gluteus medius repair and minimize the risk of abductor weakness or Trendelenburg gait.

Classic Clinical Notes