Anteromedial Approach to the Tibial Shaft

What it exposes. The anteromedial approach gives direct access to the subcutaneous anteromedial surface of the tibial shaft — the broadest and flattest face of the bone, and an ideal plate-bearing surface. It is the workhorse exposure for plate fixation of tibial shaft fractures, bone grafting of nonunions and defects, medial opening-wedge high tibial osteotomy, and debridement for osteomyelitis. Why this approach is chosen. The medial surface of the tibia is subcutaneous along its whole length from the tibial tuberosity to the medial malleolus, so the approach is technically straightforward. It allows direct visualisation and reduction of medial fragments and plate application on a flat surface, and is particularly useful when the fracture pattern or soft-tissue injury precludes intramedullary nailing (medial comminution, bone loss, or a narrow canal). Because the medial compartment is subcutaneous, it demands meticulous soft-tissue technique. Primary indications. - Tibial shaft fractures requiring plate fixation (medial comminution, bone loss, or narrow canal)

• Open tibial fractures with a medial wound requiring direct access
• Nonunion or malunion surgery requiring bone grafting and plate revision
• High tibial osteotomy (medial opening wedge)
• Proximal or distal third fractures needing plate augmentation
• Bone grafting for cystic lesions or osteomyelitis Contraindications. - Severe anteromedial soft-tissue compromise, or an open wound directly over the planned incision
• Active infection
• When posterior column access is required (use a posteromedial or posterolateral approach) Alternative approaches. A lateral approach for the lateral compartment or when medial skin is compromised; a posteromedial approach for posterior column fractures or posteromedial tibial plateau; an anterolateral approach for the lateral plateau or when combining with fibular fixation. Position & landmarks. Supine on a radiolucent table with the C-arm brought in from the contralateral side for AP and lateral views. Slight knee flexion (10 to 15 degrees) relaxes the gastrocnemius; a small bump under the ipsilateral hip helps maintain neutral rotation and the foot is kept accessible for traction. A thigh tourniquet may be applied but, if used, is inflated only after the skin incision and nerve identification. Palpable landmarks are the tibial crest (subcutaneous anterior border, from tuberosity to medial malleolus), the tibial tuberosity (proximal limit), the medial malleolus (distal limit) and the pes anserinus insertion on the proximal medial tibia. The incision runs longitudinally, 1 cm lateral to the palpable tibial crest, centred over the pathology and typically 10 to 15 cm long; mark the course of the long saphenous vein pre-operatively if it is visible.

Work down through skin and subcutaneous tissue 1 cm lateral to the crest, identify and protect the saphenous nerve and vein medially, then elevate the thin periosteum directly off the flat anteromedial surface. There is no true internervous plane — the safety of the approach rests on precise incision placement and early identification of the saphenous structures.

View larger

Structures at risk, by layer. The saphenous nerve and vein are vulnerable throughout; the nerve lies immediately medial to the incision and becomes more superficial (and so more at risk) with distal extension.

Saphenous nerve injury management. If the nerve is transected intra-operatively, perform a primary repair; otherwise document and observe. Post-operative medial-foot sensory loss is usually well tolerated and most patients adapt. A painful neuroma that is refractory to desensitisation may require later exploration and neurectomy.

Extensile options. Extend proximally along the medial border of the patellar tendon to reach the anteromedial tibial plateau for proximal-third or combined plateau–shaft injuries (the pes anserinus may be partially elevated; the saphenous nerve is more superficial here). Extend distally along the same line toward the medial malleolus for distal-third or pilon-variant fractures — the highest-risk zone, as the saphenous nerve crosses more superficially; consider a separate incision if extensive distal exposure is needed. For complex multi-column injuries, combine with a posteromedial approach (bicondylar plateau with medial involvement) or a lateral/anterolateral approach (lateral comminution), staged or simultaneous according to the soft-tissue condition. Closure principles. Irrigate copiously and secure haemostasis. Close the fascia loosely or not at all — tight closure in this limited-volume compartment risks a compartment syndrome and compromises skin perfusion. Skin closure must be tension-free with interrupted sutures or staples (a continuous suture can strangulate the edges); plan relaxing incisions or delayed primary closure when the envelope is swollen. Confirm reduction and plate position on AP and lateral fluoroscopy and obtain full-length films if length or alignment is in doubt.

• Open reduction and internal fixation of tibial shaft fractures with a medial plate — the principal use, especially for medial comminution, bone loss, or a narrow canal where nailing is contraindicated.
• Bone grafting of nonunions, bone defects and cystic lesions.
• Medial opening-wedge high tibial osteotomy for medial-compartment knee osteoarthritis with varus malalignment.
• Debridement and sequestrectomy for osteomyelitis.
• Plate augmentation of intramedullary-nail constructs when additional medial stability is needed. Recovery & aftercare. Check and document saphenous nerve sensation on the medial foot and inspect the wound for tension or haematoma, with the limb elevated above heart level. Weight bearing is non- or touch-weight-bearing for 6 to 12 weeks depending on stability, progressing on radiographic healing; aim for full knee and ankle range of motion by 6 to 8 weeks. Follow-up is typically at 2 weeks (wound check, suture removal), 6 weeks and 12 weeks (radiographs and weight-bearing progression), 6 months and 1 year. DVT prophylaxis (LMWH or aspirin per protocol) continues until the patient is mobile — a minimum of 2 weeks, often 4 to 6 weeks.