Ankle - Medial Approach

Modern Study Review (AI-Generated)

High-Yield Summary

The medial approach to the ankle is a time-tested, gold standard technique for direct access to the medial malleolus, deltoid ligament, and medial ankle joint. It is primarily indicated for open reduction and internal fixation (ORIF) of medial malleolar fractures and repair of the deltoid ligament complex. Despite advances in minimally invasive and arthroscopic methods, this approach remains indispensable for cases requiring precise visualization and control of medial ankle anatomy.

Applied Anatomy & Intervals

Internervous Interval

None: There is no true internervous plane; meticulous dissection is essential to avoid injury to neurovascular structures.

Anatomic Landmarks

Tip of the medial malleolus (primary incision landmark)
Anterior border of the medial malleolus
Posterior tibial (TP) tendon immediately posterior to the medial malleolus
Long saphenous vein and saphenous nerve anterior to the medial malleolus

Patient Positioning & Setup

Table Type

Standard operating table capable of accommodating a thigh or calf tourniquet.

Patient Position

Supine position with the foot positioned at the table edge to facilitate manipulation and eversion.

Specialized Equipment

Pneumatic tourniquet for a bloodless surgical field
Limb positioners or sandbags to maintain foot eversion during exposure
C-arm fluoroscopy positioned contralateral to the operative limb for intraoperative imaging

Surgical Technique (The “Vital Steps”)

Incision & Superficial Dissection

Longitudinal incision centered over the tip of the medial malleolus, curving slightly anteriorly onto the medial midfoot.
Careful mobilization of skin flaps, preserving subcutaneous tissues.
Early identification and protection of the long saphenous vein and saphenous nerve located anterior to the medial malleolus.

Deep Dissection & Exposure

Identify the junction of the medial malleolus and tibial shaft.
Longitudinal incision of the anterior joint capsule to access the ankle joint.
Division of the flexor retinaculum to expose the posterior tibial (TP) tendon.
Gentle posterior retraction of the TP tendon to expose the posterior surface of the medial malleolus.
Longitudinal scoring of the medial malleolus if osteotomy is planned.
Drill and tap the medial malleolus for fixation hardware placement.
Osteotomy of the medial malleolus from superior to inferior using an oscillating saw.
Inferior reflection of the medial malleolus with the attached deltoid ligament to expose the talar dome.
Eversion of the foot to enhance visualization of the talar dome and medial joint space.

The “Danger Zone”

Structure	Location Relative to Incision	Risk & Protection Strategy
Saphenous nerve	Anterior to medial malleolus	Identify early; avoid traction or transection
Long saphenous vein	Anterior to medial malleolus	Preserve or ligate carefully to prevent bleeding
Posterior tibial tendon (TP)	Posterior to medial malleolus	Retract gently; avoid excessive traction

Post-Operative Pearl

Early mobilization is limited to protected range of motion to minimize stress on the deltoid ligament and osteotomy site. Weight-bearing is generally deferred until radiographic evidence of healing is confirmed, typically at 6-8 weeks postoperatively.

Classic Clinical Notes