Quick answer
Diabetic foot ulcer is the commonest cause of non-traumatic amputation. The problem is usually ischaemia plus infection plus neuropathy, and the surgical options have historically been limited: revascularisation if a large vessel is salvageable, debridement, and amputation if not. Tibial transverse bone transport takes a different route, using Ilizarov's tension-stress principle — slowly moving a small bone segment stimulates new vessel formation in the whole limb. Xu Hailin's trauma orthopaedics team at Peking University People's Hospital presented a double-flap modification at the 2025 Singapore Orthopaedic Congress, aimed at improving blood supply, healing and complication control [1][2][5].
Key takeaways
- Technique: two tibial bone flaps rather than one, gradually distracted to stimulate angiogenesis [1].
- Principle: Ilizarov tension-stress, with distraction typically at 1 mm per day in divided increments [5].
- Setting: a diabetic foot multidisciplinary service combining transport with vacuum-assisted closure and wound care [2].
- Presentation: invited lecture at the 2025 Singapore Orthopaedic Congress and Asian Foot and Ankle Meeting [1].
- The same team also works on stem cell approaches to post-traumatic ankle arthritis [1][4].
Why moving bone grows blood vessels
Ilizarov observed that slowly separating bone ends generates not only new bone but new soft tissue, including vasculature. Transverse transport applies this across the tibia rather than along it: a rectangular flap of cortex is cut, reattached to an external fixator, and moved laterally by a millimetre a day. The mechanical stimulus drives angiogenesis in the whole lower leg, and the foot distal to it is reperfused indirectly [3][5].
The double-flap modification is a response to a practical limitation: a single flap produces a finite stimulus, and in severely ischaemic limbs it may be insufficient. Two flaps increase the angiogenic drive and distribute the mechanical effect, at the cost of a more complex osteotomy and fixator configuration [1].
Where it fits, and where it does not
This is not a substitute for revascularisation. A patient with an occluded iliac or femoral artery needs that fixed first; transport works on the microcirculation downstream. It also requires an external fixator worn for weeks, which is a real burden for an elderly patient with neuropathy and poor eyesight [3][5].
The evidence described is a centre's experience presented at a meeting, not a randomised comparison against standard care or against single-flap transport. Diabetic foot ulcers heal at variable rates with offloading, debridement and infection control alone, so uncontrolled series overstate any technique's effect. Pin-site infection is the characteristic complication of external fixation and is more frequent in diabetic patients. The published material reviewed does not give healing or amputation rates for the double-flap technique [1][2].
The condition in context: diabetic foot
It is a late complication with a prognosis worse than many cancers when amputation occurs.
| Region | What the data shows | Source |
|---|---|---|
| Mechanism | Neuropathy, peripheral arterial disease and infection combine; ischaemia prevents healing [5]. | Health science report [5] |
| Amputation risk | Diabetic foot is a leading cause of amputation [2]. | Lu Wang Qingdao [2] |
| Service model | Multidisciplinary clinics combine vascular, orthopaedic, endocrine and wound care [2]. | Lu Wang Qingdao [2] |
Because amputation carries high mortality and loss of independence, limb-salvage techniques with plausible mechanisms are worth pursuing even while evidence matures [3][5].
Why it matters
| Potential | What the report suggests | Source |
|---|---|---|
| Microcirculation | Angiogenesis stimulated by mechanical distraction [3][5]. | [3][5] |
| Limb salvage | Offered when distal vessels are not reconstructable [2]. | [2] |
| Caution | Conference-level evidence; fixator burden [1]. | [1] |
Availability and limits
- This is an editorial summary of conference and hospital reporting, not a treatment recommendation [1][2].
- No randomised data on healing or amputation rates [1].
- Does not replace revascularisation where a large vessel is occluded [3].
- External fixation requires weeks of care and carries pin-site infection risk [5].
- Requires a diabetic foot multidisciplinary team and expert fixator management [2][6].
What to ask before booking
| Question | Why it matters |
|---|---|
| Has my blood supply been assessed, and is revascularisation possible? | Large-vessel disease must be treated first [3]. |
| What are your healing and amputation rates with this technique? | Published comparative data are lacking [1]. |
| Which department handles foreign patients, and in what language? | The hospital is a working hospital we do not book; confirm international-department coordination and language support. |
| Who manages the fixator and pin sites? | Pin-site infection is the main complication [5]. |
Questions patients ask
What is tibial transverse bone transport?
A surgical technique that cuts a small bone flap from the tibia and moves it slowly with an external fixator, using tension-stress to stimulate new blood vessel formation in the limb [3][5].
What is the double-flap modification?
Using two bone flaps rather than one to increase the angiogenic stimulus, presented by Xu Hailin's team at the 2025 Singapore Orthopaedic Congress [1].
Does it replace vascular surgery?
No — it addresses the microcirculation and does not substitute for treating a blocked major artery [3].
Is there proof it works?
The evidence described is single-centre experience presented at a conference, without randomised comparison [1].
Is this relevant to international patients?
It is useful context for China's limb-salvage practice. The hospital is a working hospital we do not book — contact its international department directly [1].