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  • I was born and raised in Sierra Leone,

  • a small and very beautiful country

  • in West Africa,

  • a country rich both in physical resources

  • and creative talent.

  • However, Sierra Leone is infamous

  • for a decade-long rebel war in the '90s

  • when entire villages were burnt down.

  • An estimated 8,000 men, women and children

  • had their arms and legs amputated during this time.

  • As my family and I ran for safety

  • when I was about 12 from one of those attacks,

  • I resolved that I would do everything I could

  • to ensure that my own children

  • would not go through the same experiences we had.

  • They would, in fact, be part of a Sierra Leone

  • where war and amputation

  • were no longer a strategy for gaining power.

  • As I watched people who I knew, loved ones,

  • recover from this devastation,

  • one thing that deeply troubled me

  • was that many of the amputees in the country

  • would not use their prostheses.

  • The reason, I would come to find out,

  • was that their prosthetic sockets

  • were painful because they did not fit well.

  • The prosthetic socket is the part

  • in which the amputee inserts their residual limb,

  • and which connects to the prosthetic ankle.

  • Even in the developed world,

  • it takes a period of three weeks to often years

  • for a patient to get a comfortable socket, if ever.

  • Prosthetists still use conventional processes

  • like molding and casting

  • to create single-material prosthetic sockets.

  • Such sockets often leave intolerable amounts

  • of pressure on the limbs of the patient,

  • leaving them with pressure sores and blisters.

  • It does not matter

  • how powerful your prosthetic ankle is.

  • If your prosthetic socket is uncomfortable,

  • you will not use your leg,

  • and that is just simply unacceptable in our age.

  • So one day, when I met professor Hugh Herr

  • about two and a half years ago,

  • and he asked me if I knew how to solve this problem,

  • I said, "No, not yet,

  • but I would love to figure it out."

  • And so, for my Ph.D. at the MIT Media Lab,

  • I designed custom prosthetic sockets

  • quickly and cheaply

  • that are more comfortable

  • than conventional prostheses.

  • I used magnetic resonance imaging

  • to capture the actual shape of the patient's anatomy,

  • then use finite element modeling to better predict

  • the internal stresses and strains

  • on the normal forces,

  • and then create a prosthetic socket for manufacture.

  • We use a 3D printer to create

  • a multi-material prosthetic socket

  • which relieves pressure where needed

  • on the anatomy of the patient.

  • In short, we're using data

  • to make novel sockets quickly and cheaply.

  • In a recent trial we just wrapped up

  • at the Media Lab,

  • one of our patients, a U.S. veteran

  • who has been an amputee for about 20 years

  • and worn dozens of legs,

  • said of one of our printed parts,

  • "It's so soft, it's like walking on pillows,

  • and it's effing sexy."

  • (Laughter)

  • Disability in our age

  • should not prevent anyone

  • from living meaningful lives.

  • My hope and desire is that the tools and processes

  • we develop in our research group

  • can be used to bring highly functional prostheses

  • to those who need them.

  • For me, a place to begin healing the souls

  • of those affected by war and disease

  • is by creating comfortable and affordable interfaces

  • for their bodies.

  • Whether it's in Sierra Leone or in Boston,

  • I hope this not only restores

  • but indeed transforms their sense of human potential.

  • Thank you very much.

  • (Applause)

I was born and raised in Sierra Leone,

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B2 TED prosthetic socket leone sierra leone sierra

【TED】David Sengeh: The sore problem of prosthetic limbs (David Sengeh: The sore problem of prosthetic limbs)

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    CUChou posted on 2015/07/02
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