Prosthetic Leg Wearing Schedule

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Before taking home the prosthetic leg, you will learn how to put it on and take it off, and you will also practice walking with it.

Once you take it home, your prosthetist will provide you with a wearing schedule that is important to follow, as it helps acclimate your residual limb to the prosthesis. Similar to how, when exercising, you work your way up to more difficult workouts, you also need to train your residual limb to the prosthesis.

While you may wish to go right to wearing your prosthetic leg all the time, it is crucial to follow the wearing schedule and not overdo it, as that may result in pain and potential injury. It takes a lot of time, strength, effort, and patience to learn to use a prosthesis, which is why the wearing schedule is important to avoid overdoing it.

Some individuals find it easier to use a cane or crutch as they learn to walk with a prosthesis because it&#;s a significant learning curve as you learn how to use the device and practice your balance, coordination, and gait. The cane or crutch can help provide stability as you learn to properly use your prosthesis and avoid placing unnecessary stress on the body due to an improper gait.

Once the wearing schedule is complete and your residual limb becomes fully acclimated to the prosthetic leg, you may wear your prosthesis all day. However, it is important to never wear it while sleeping.

Video: Finding &#; and keeping &#; the perfect fit for a prosthetic leg

The muscles and tissues in arms and legs change throughout the day. They warm up, cool off, stiffen, swell or constrict based on things like activity level, environment and age.

But a prosthetic leg does not change. People who rely on them must make manual adjustments throughout the day &#; usually by adding or removing padding within the socket of the prosthesis. This can be a cumbersome process in public, or when wearing certain clothing. Skipping adjustments can lead to pain or limit mobility.

University of Washington Professor Joan Sanders and her team are creating a new type of prosthetic leg: one that automatically adjusts its fit throughout the day. Her group, housed within the Department of Bioengineering, designs, builds and tests prosthetics for people with below-the-knee amputations &#; also known as trans-tibial amputations. Their latest prototype alters its fit without the need for adjustments to padding or user action. It detects in real time how well the prosthesis socket and amputation site are fitting and responds by automatically changing the size of the socket.

Test results with volunteers are so promising that the researchers hope to eliminate the need to add or remove padding throughout the day.

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&#;We don&#;t want people to have to think about how well their prosthesis is fitting, because that is a barrier to living your life,&#; said Sanders, who is also a UW alum.

At first glance, the prototype resembles a typical prosthetic limb for people with a below-the-knee amputation. But it contains several key features to make auto adjustment possible:

• A gel interface material &#; shaped like a sock that users typically wear over the amputation site &#; that contains a small amount of iron.
• Three ultrathin sensors embedded within the wall of the prosthetic limb&#;s socket detect the distance to the iron in the gel and send that data to the socket&#;s microcontroller.
• The microcontroller calculates whether adjustments are needed. If so, it transmits instructions to three motorized &#;panels&#; within the socket wall &#; two in the front, one in the back. The panels can move in to make the socket smaller, or out to make it bigger.

The adjustments that the panels make, which can also be controlled manually via an app on the user&#;s smartphone, are usually tiny &#; less than a millimeter.

&#;But they have a big impact because they maintain a fit between residual limb and socket that is not too tight and not too loose &#; but &#;just right,&#;&#; said Kate Allyn, the prosthetist on Sanders&#; team.

Through trials with volunteers, the team has found that these automatic adjustments take the place of switching out padded &#;socks&#; that prosthesis users normally wear and change throughout the day.

&#;When I&#;m wearing this prototype, I don&#;t have to think about my prosthesis. The fit is always perfect,&#; said Daniel Lumley, a UW alum and volunteer who has helped to test the auto-adjusting prototype.

Through user trials with volunteers like Lumley, Sanders&#; team is collecting more detailed data on the device&#;s performance and is working to make the prototype&#;s motors smaller and lighter.

&#;We are making an auto-adjusting socket that really works,&#; said Sanders. &#;I truly believe that.&#;

This research is funded by the U.S. Department of Defense and the National Institutes of Health.

For more information, contact Sanders at .

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