Prosthesis Quotes

“Cybernetics”

“Q: Do the clients always know what they want?”

“Prothesis”

“Prosthesis”

“Q: Being so focused on other people’s limbs all the time, I wonder, what’s your relationship with your own limbs like?”

“[H]uge number of casualties in the American Civil War caused demand for artificial limbs to skyrocket. Many veterans turned to designing their own prosthetics as a response to the limiting capabilities of the limbs on offer.”

“In 1919, a German book titled Ersatzglieder und Arbeitshilfen (Limb Substitutes and Work Aids) contained conceptual designs for the first externally powered prostheses, using pneumatic and electric power sources. Unfortunately, these revolutionary designs were too complex to be feasible with contemporary technology.”

““If you wear a prosthesis you are disabled for about ten minutes in the morning while you have a shower, then you put your leg on and go to work. If you do not have one, then your hands are out of use with crutches so you can’t even take drinks to the table,” said Carson Harte, a 59-year-old prosthetist and chief executive of Exceed. “Without a prosthesis there are no expectations. You just go back and rely on the goodwill of your family.””

“An effective prosthesis delivers renewed functionality and is cosmetically pleasing, but it also serves to complete the wearer’s sense of wholeness. A prosthesis then, is as much medical device as it is an emotional comfort, and so the history of prosthetics is not only a scientific history, but the story of human beings since the dawn of civilization who by birth, wound, or accident were left with something missing.”

“In 1948, Reinhold Reiter, a physics student at Munich University (Munich, Germany), created the first myoelectric prosthesis, a device that amplifies surface electromyography (EMG) potentials to power motorized parts. Although Reiter published his work, it was not widely appreciated, and this potentially ground-breaking invention did not gain commercial or clinical acceptance.”

“The earliest example of a prosthesis ever discovered is not a leg, arm, or even a fake eye, it’s a toe. A big toe, belonging to a noblewoman, was found in Egypt and dated to between 950-710 B.C.E. We all know that toes are important, but it’s interesting that our earliest physical example of the history of prosthetics is a toe and not something that might seem more important, like a leg or an arm.”

“People have used all sorts of artificial devices probably from the beginnings of human history to help them compensate for the loss of a limb. Thus in very ancient times, the first and simplest prosthesis may have been a forked tree that was used as a crutch to help someone walk whose leg may have been badly damaged or lost in an accident or to a disease. What began as a modified crutch with a wooden or leather cup and progressed through many metamorphoses has now developed into a highly sophisticated prosthetic limb made of space-age materials.”

“Yet for all the agonies and difficulties associated with arm loss, the bigger problem in low-income countries is when lower limb disability leads to loss of mobility. Wheelchairs are expensive and can be difficult to use when roads are pot-holed, streets are muddy and pavements are non-existent. Without a prosthetic limb, people struggle to fetch water, to prepare food and, above all, to work. This throws them back on their families and communities, intensifying any hardship and poverty.”

““There’s a dream that in the future, we’ll be sitting in our home and hit a button to print our prosthetics from scratch,” Sadler says. “That might be a further out vision.”
But some people think we’re already there.
Sadler agrees with Kuniholn about the difficulty of attaching printed prosthetics, saying, “The fitting is a whole other black art. 3-D printing only gets you part of the way.” Of course, that’s for high-end prosthetics, the kind you hope to have. In some parts of the world, the choice is between having a mediocrely-fitting prosthetic and not having one at all. This is the situation that spurred Summit to action, as well as Patrice Johnson, who, according to Sadler, is, “the only person to have successfully designed and sold [a] functional upper limb prosthesis that used 3-D printing.””

“For Wright, the prosthetic had to have a purpose. She wasn’t interested in something that made her look “normal” if it wasn’t going to help her actually do anything better. And she isn’t alone. More and more amputees, engineers, and prospective cyborgs are rejecting the idea that the “average” human body is a necessary blueprint for their devices. “We have this strong picture of us as human beings with two legs, two hands, and one head in the middle,” says Stefan Greiner, the founder of Cyborgs eV, a Berlin-based group of body hackers. “But there’s actually no reason that the human body has to look like as it has looked like for thousands of years.” Greiner himself has magnetic implants in his fingers and an RFID chip in his skin. “We actually already live in a cyborg society,” he said.”

“World War I (1914 to 1918) resulted in casualties in numbers previously unimagined. In the United States (US), amputee rehabilitation programs were created to help the >4400 amputees, of which the majority (54%) were upper limb, to regain some ability to work on farms or in factories. The distribution of prosthetics with sockets and a universal terminal device allowed the attachment of various work tools. In 1917, the Surgeon General of the US Army is-sued a landmark invitation for limb makers to meet in Washington, DC. The result was the creation of the Association of Limb Manufacturers of America, today the American Orthotic & Prosthetic Association. In Canada, a national charter in 1920 recognized the need to provide support to amputees, leading to the creation of the Amputations Association of The Great War, today known as the War Amps.”

“Traditionally, a prosthetist would wrap a stump with plaster of Paris bandages to make a reverse mold and let it dry, then fill it with more plaster that must harden. From this a socket can be forged that fits, with more modifications for precision, to the bone on the stump. Great care must be taken to avoid nerves and tender areas that are not tolerant of pressure. The key for the technician is to understand the pathology of a stump, which differs for each person. This is a cumbersome process that can take a week, especially with gait training for new patients that lasts three days. It can also be messy work, mixing up and molding the plaster, while a prosthetist visiting a rural area must cart around 20-kilo packs of plaster. But with a 3-D scanner, a digital image can be made in half an hour and sent by email, and there is no mess.”

“At a lab at Johns Hopkins University, researchers are building a prosthetic hand unlike any other: It can sense pain.
It’s easy to understand why you might want a prosthesis that can feel the squishiness of a grape or the warmth of another person’s hand. But pain? Well, pain could be useful, too. “If you think about how we humans use pain, it’s to protect our bodies, to prevent damage,” says Luke Osborn, a graduate student in Nitish Thakor’s lab at Hopkins, who co-authored a new paper on the pain-sensitive hand.
People born without the ability to feel pain stumble through life with dangerous freedom. Babies who do not feel pain are known to chew their fingers raw; children without pain will plunge their hands into boiling water. Pain is a signal that says, Hey, watch out. “People do damage their prosthetic limbs a lot. They use them as tools they weren’t designed to be used as,” says Levi Hargrove, a bioengineer at the Shirley Ryan AbilityLab, who was not involved in the study. It’s easy, for example, to bang an unfeeling piece of plastic and metal against a table. Pain could make a prosthesis feel more real, more lifelike—less a tool and more like a natural part of the body.”

“There is a moment when each ultra-realistic prosthetic limb crafted by Sophie de Oliveira Barata transitions from a hunk of silicon into something more. “It happens around this point,” the artist explained, gesturing to a half-finished leg jutting mid-kick from her work bench. “I’ll know it’s happened when I handle a limb a bit roughly, and I find myself apologizing to it: ‘Oh, sorry!’”
It’s an easy mistake to make. With precision molding, hand-painted veins, and real human hairs, the limbs scattered around Sophie’s studio look uncannily real: legs on the verge of dancing and hands ready to burst into applause. With these prostheses, Sophie enables her customers to conceal their absences and blend in. But the artist also caters to another kind of clientele: amputees wanting to stand out. She works with these clients to imagine the missing parts of their bodies as fantastical works of art: an arm housing a motorized coiling snake, a jewel-studded leg with embedded stereo, a bird-wing arm with a metal hook for a talon. “Instead of seeing what’s missing,” she remarked, “you see what’s there.””

“In France and Switzerland, from the late fifteenth through the nineteenth centuries, a variety of custom-designed limbs were built. Made of combinations of wood, metal, Leather|leather, and other materials, some of these designs were truly fantastic. Controlled by cables, gears, cranks, and springs, these limbs could be rotated and bent. There were prosthetic fingers made to grip objects. The limbs were not completely practical, as they had to be operated by a different hand, but they had their uses. For example, a hand could be cranked shut around a pen or fork. Flexing, spring-loaded legs were also available. These fantastic objects were ahead of their time: cable control was a precursor to the standard post-World War II design.
Following those early designs, prosthetic limbs improved by leaps and bounds. World Wars I and II, as well as other large-scale conflicts, such as Vietnam, unfortunately increased demand for prosthetics, leading to improvements.”