Case 03 2026: Emergency limb salvage with combined free vastus lateralis and anterolateral thigh flap after post-traumatic brachial artery graft thrombosis in a 16-year-old patient (Copy for review /MBAV)

On examination by the plastic surgery team, the left upper extremity showed extensive soft-tissue loss around the elbow and proximal forearm, with the humerus stabilized in an external fixator. Despite the thrombosis of the brachial artery interposition graft, the hand was still warm with delayed but present capillary refill, indicating residual distal perfusion through collateral arterial flow.

After early thrombosis of the saphenous vein interposition graft, the limb fulfilled the criteria of a mangled extremity with major vascular injury, open fracture, and extensive soft-tissue destruction. According to institutional trauma algorithms and established trauma scoring systems used in severely injured patients, the extremity was considered to carry a very high risk of limb loss and systemic morbidity, and above-elbow amputation was therefore proposed by the trauma and vascular surgery teams [3,4].
However, in view of the preserved distal perfusion, the patient’s young age, absence of comorbidities, and the presence of viable tissue, a limb-salvage strategy was considered technically feasible by the plastic surgery team. An emergency microsurgical reconstruction using a combined free vastus lateralis and anterolateral thigh flap was therefore selected to preserve the extremity and its function.

All necrotic tissue was excised until viable bleeding muscle and soft tissue were reached. The wound was converted into a clean, reconstructable defect measuring approximately 19 x 12 cm.

The thrombosed saphenous interposition graft was confirmed. Recipient arteries and veins suitable for microvascular anastomosis were identified proximally in the arm.

A free anterolateral thigh (ALT) flap incorporating a segment of the vastus lateralis (VL) muscle was harvested to provide sufficient tissue volume for reconstruction of the deep soft-tissue defect. After completion of flap harvest, the flap was transferred to the left upper extremity. The thrombosed saphenous vein graft was removed and the recipient vessels were irrigated with heparinized solution, after which a flow-through arterial anastomosis was created between the proximal and distal segments of the brachial artery, with two concomitant veins anastomosed for venous outflow. This was followed by insetting of the vastus lateralis muscle to fill the deep defect and positioning of the ALT skin paddle for definitive surface coverage. The remaining skin defect was covered with split-thickness skin graft harvested from the thigh region.

Despite the severity of the trauma, the flap demonstrated stable perfusion and progressive wound healing.

The limb was preserved with stable soft-tissue coverage and improving function.

These images demonstrate progressive thinning of the flap and restoration of a more natural forearm contour, including the ability to hold a pen and perform fine motor tasks.

These images demonstrate progressive thinning of the flap and restoration of a more natural forearm contour, including the ability to hold a pen and perform fine motor tasks.

These images demonstrate progressive thinning of the flap and restoration of a more natural forearm contour, including the ability to hold a pen and perform fine motor tasks.

These images demonstrate progressive thinning of the flap and restoration of a more natural forearm contour, including the ability to hold a pen and perform fine motor tasks.

Ten-year postoperative photographs demonstrate durable soft-tissue coverage, stable contour, and preserved function of the salvaged upper extremity. The transferred flap has maintained a proportional relationship to the surrounding tissues and adapted harmoniously to the patient’s somatic development over time, resulting in a balanced and natural overall silhouette.

Ten-year postoperative photographs demonstrate durable soft-tissue coverage, stable contour, and preserved function of the salvaged upper extremity. The transferred flap has maintained a proportional relationship to the surrounding tissues and adapted harmoniously to the patient’s somatic development over time, resulting in a balanced and natural overall silhouette.

u0026#8226; Successful limb salvage in complex trauma depends not only on surgical technique, but on close interdisciplinary coordination between trauma surgery, vascular surgery, plastic surgery, and anesthesia. In this case, standard trauma and vascular algorithms would have led to amputation, whereas a reconstructive perspective allowed a different, limb-preserving solution.
u0026#8226; Anesthetic stabilization is a critical enabler of complex emergency reconstruction. Without rapid hemodynamic control and intraoperative support, microsurgical limb salvage in critically injured patients is often not feasible [5].
u0026#8226; The combination of an anterolateral thigh flap with a vastus lateralis muscle component provides both surface coverage and deep tissue volume, which is particularly valuable in young, thin patients where an ALT flap alone may be insufficient to reconstruct extensive three-dimensional soft-tissue defects.
u0026#8226; In emergency limb-salvage situations, a pragmatic reconstructive strategy focused on the patient and on reasonable operative time is essential. Although highly sophisticated designs such as chimeric ALT–vastus lateralis flaps offer maximal intraoperative flexibility, their preparatory complexity may not be justified in critically injured patients. In our case, a myocutaneous ALT flap incorporating the vastus lateralis muscle, combined with staged secondary debulking, achieved a comparable long-term functional and contour outcome with a substantially shorter initial operative time [6-8].
u0026#8226; In young patients, a more aggressive and reconstructive-first strategy can yield a disproportionally large long-term benefit, transforming an otherwise life-long disability into a functional extremity.

u0026#8226; Relying exclusively on emergency and trauma algorithms can result in amputation in cases where residual perfusion and tissue viability still permit salvage. Multidisciplinary reassessment is essential in borderline situations.
u0026#8226; Venous interposition grafts carry a substantial risk of early thrombosis and therefore require close postoperative surveillance. Graft failure should prompt immediate reassessment of limb viability rather than automatic abandonment of reconstruction.

u0026#8226; Following emergency reconstruction, the patient underwent intensive clinical flap monitoring and general condition stabilization. Early referral to hand therapy and occupational therapy was initiated to preserve joint mobility and hand function.
u0026#8226; Given the initial volume of the transferred tissues, staged secondary debulking procedures were planned and performed at appropriate intervals to refine contour, improve range of motion, and optimize the silhouette of the reconstructed forearm. Secondary contour refinement is an integral part of successful limb reconstruction, not a complication.
u0026#8226; Long-term follow-up focused on functional recovery, scar management, and progressive rehabilitation, ultimately allowing the patient to return to daily activities and professional life with preserved use of her left hand.

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[7] Lee YJ, Kim J, Lee CR, et al. Anterolateral Thigh Chimeric Flap: An Alternative Reconstructive Option to Free Flaps for Large Soft Tissue Defects. J Clin Med. 2023;12(21):6723. Published 2023 Oct 24. doi:10.3390/jcm12216723
[8] Abdelrahman M, McGarry K, Alsharkawy K, Wu JC, Cheong DC. A constant harvest technique for chimeric anterolateral thigh flaps and patient outcomes following their use in reconstructive head and neck surgery. J Plast Reconstr Aesthet Surg. 2021;74(5):1013-1021. doi:10.1016/j.bjps.2020.10.111