Foot & Ankle Reconstruction: Applying the Subunit Principle

06/10/2025 10 min

Listen "Foot & Ankle Reconstruction: Applying the Subunit Principle"

Episode Synopsis

Foot and ankle reconstruction is a battlefield of function and form. Every subunit has its own demands — the dorsum needs thin, pliable coverage; the heel demands durable, glabrous-like skin. In this landmark PRS 2010 paper, Hollenbeck et al. applied the subunit principle to 165 free flaps, giving surgeons a blueprint for tailored, long-term reconstruction success.Summary:This episode breaks down the seven distinct subunits of the foot and ankle, each with unique reconstructive goals. We discuss the data behind flap outcomes, limb salvage (89% at 5 years), and complication rates, including the common pitfalls like flap debulking and late ulceration — especially in the heel subunit.We’ll explore how subunit-based flap planning improves durability, shoe-fit, and overall limb function — plus, how specific flaps like the radial forearm, ALT, and latissimus dorsi perform across zones.Key Takeaways:7 subunits = 7 reconstructive goals.Heel (Subunit 5) = highest instability risk.Mean ambulation: 3.1 months.Limb salvage: 89% at 5 years.Subunit mapping improves both form and function.Citation:Hollenbeck ST, Woo S, Komatsu I, et al. Longitudinal Outcomes and Application of the Subunit Principle to 165 Foot and Ankle Free Tissue Transfers. Plast Reconstr Surg. 2010;125(3):924–934. DOI: 10.1097/PRS.0b013e3181cc9630🎧 Full episodes available now:Instagram: https://www.instagram.com/plasticsinpractice/  Spotify: https://open.spotify.com/show/4Ct8jOgYXP9QJin7QOuG3Z?si=JNcBxQmwT2mfz1LSJZEFKA Apple: https://podcasts.apple.com/us/podcast/plastics-in-practice-resident-review/id1835564216 YouTube: https://youtube.com/@plasticsinpractice?si=tqLInp5vvsJFKlRO Amazon: https://music.amazon.com/podcasts/8bef056e-7c87-4224-978e-7e691b04554a/ 📘 Free Study Guides: → https://drive.google.com/drive/u/0/folders/12BUldPbCmihG-ndZh6992WqhRYyxw8ZZ