Transmetatarsal Amputation
Pronunciation: trans-met-ah-TAR-sal
Also written as: TMA — Transmetatarsal Amputation
A partial-foot amputation in which the transection is made through the metatarsal shafts, preserving the hindfoot and a portion of the midfoot.
Full Definition
A transmetatarsal amputation (TMA) involves surgical removal of the forefoot by transecting through the metatarsal bones, leaving the hindfoot and ankle intact. It is commonly performed in patients with diabetic foot complications, peripheral vascular disease, or localised trauma. The residual limb retains functional ankle motion, which substantially influences prosthetic and orthotic management. Editors must distinguish TMA from transtarsal amputations such as the Chopart, which are more proximal, and from toe amputations, which are more distal.
Usage
Usage note: The abbreviation TMA is widely used in diabetic and vascular surgical documentation; expand on first use in formal reports.
In Context
- "The diabetic patient required a transmetatarsal amputation following non-healing forefoot ulcers resistant to conservative management." — Surgical referral letter
- "The TMA (transmetatarsal amputation) was documented at the metatarsal shaft level, ruling out the more proximal Chopart classification." — Prosthetic evaluation form