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Lower Extremity Reconstruction: Core Principles
Lower extremity reconstruction is the most unforgiving testing ground in plastic surgery — every decision is graded by whether the patient can bear weight, walk, and protect a sensate foot for the rest of their life.
In this episode of Plastics in Practice, we walk through the core principles of lower extremity salvage: the zone-of-injury concept, when to fix vs. amputate, fracture management, soft-tissue coverage by leg third, and the trade-offs between limb salvage and a well-fit below-knee amputation.
Key takeaways
- Salvage is judged against amputation, not “normal.” The goal is a limb more functional than a prosthesis — loss of the tibial nerve and plantar sensibility is a relative contraindication.
- Stabilize the skeleton first. Vascular and nerve repairs done before fixation are routinely disrupted during fracture reduction; external fixation is the workhorse for grade IIIB / IIIC injuries.
- Early soft-tissue coverage wins. Closure within 72 hours of injury carries the lowest complication rate; delayed closure (1–6 weeks) climbs to ~50%.
- Match the flap to the leg third: gastrocnemius proximal, soleus middle, free tissue distal.
- Bone gaps have a tiered answer: cancellous graft for short defects, Ilizarov distraction for 4–8 cm gaps, vascularized fibula up to ~24 cm.
- VAC therapy buys time, not closure. It improves the bed and reduces flap size, but use beyond 7 days is associated with higher infection and amputation rates in IIIB tibias.
- BKA is a reconstructive choice, not a failure. It adds ~25% to the energy cost of ambulation vs. ~65% for AKA; preserve the knee whenever possible, including with a foot-fillet free flap from the amputated part.
This content is for educational purposes only and is not medical advice.
🎧 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
#PlasticSurgery #Residency #LowerExtremityReconstruction #LimbSalvage #PlasticsInPractice #Microsurgery #FreeFlap
View all episodes
By Plastics in PracticeLower extremity reconstruction is the most unforgiving testing ground in plastic surgery — every decision is graded by whether the patient can bear weight, walk, and protect a sensate foot for the rest of their life.
In this episode of Plastics in Practice, we walk through the core principles of lower extremity salvage: the zone-of-injury concept, when to fix vs. amputate, fracture management, soft-tissue coverage by leg third, and the trade-offs between limb salvage and a well-fit below-knee amputation.
Key takeaways
- Salvage is judged against amputation, not “normal.” The goal is a limb more functional than a prosthesis — loss of the tibial nerve and plantar sensibility is a relative contraindication.
- Stabilize the skeleton first. Vascular and nerve repairs done before fixation are routinely disrupted during fracture reduction; external fixation is the workhorse for grade IIIB / IIIC injuries.
- Early soft-tissue coverage wins. Closure within 72 hours of injury carries the lowest complication rate; delayed closure (1–6 weeks) climbs to ~50%.
- Match the flap to the leg third: gastrocnemius proximal, soleus middle, free tissue distal.
- Bone gaps have a tiered answer: cancellous graft for short defects, Ilizarov distraction for 4–8 cm gaps, vascularized fibula up to ~24 cm.
- VAC therapy buys time, not closure. It improves the bed and reduces flap size, but use beyond 7 days is associated with higher infection and amputation rates in IIIB tibias.
- BKA is a reconstructive choice, not a failure. It adds ~25% to the energy cost of ambulation vs. ~65% for AKA; preserve the knee whenever possible, including with a foot-fillet free flap from the amputated part.
This content is for educational purposes only and is not medical advice.
🎧 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
#PlasticSurgery #Residency #LowerExtremityReconstruction #LimbSalvage #PlasticsInPractice #Microsurgery #FreeFlap