Prosthetic sockets are devices that join your residual limb to the prosthesis. Each prosthetic socket is unique as it is made for the individual who will be wearing it. As you can imagine, one of the most important parts of a prosthetic socket is ensuring that it fits comfortably so that it helps amputees and allows them to live a functional and full life. At PrimeCare Orthotics & Prosthetics, we excel in the art and science of personalized socket manufacturing, creating bespoke devices tailored to your needs. In this article, we'll provide a comprehensive understanding of how they work.
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A socket is an interface between a residual limb (stump) and a prosthetic device. This custom-made sleeve fits snugly around the end of the residual limb. It creates a suction seal that allows the prosthesis to distribute an amputee's weight and facilitates their movement, making it fluid and comfortable.
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Sockets are custom-made to fit the individual amputee's residual limb and may have various features to provide support, stability, and comfort.
Some of the most common features of prosthetic sockets include:
Today's prosthetic sockets are made of modern plastic and silicone materials as they offer a good mixture of comfort and functionality for the patient. It's also common to see materials such as aluminum, stainless steel, carbon, and titanium in prosthetic connective componentry. The use of these materials is relatively new as more research and technology help to modernize and improve the prosthetic socket design. Some of the first lower-limb sockets were made from wood and leather.
During the fitting process, you'll work directly with a prosthetist to create a check (test) socket. This is a clear socket that helps the prosthetist understand if any areas cause too much pressure or redness. If you try your check socket and you are having issues with its comfortability or wearability, it can easily be modified to better suit the shape of your limb. The prosthetic socket shouldn't just fit properly, but also have adequate load transmission to ensure stability and control for the patient.
While there are different options when it comes to prosthetic socket types, most use the PTB SC (Patellar Tendon Bearing Supracondylar) socket for lower-limb amputations. With this type of design, the weight bearing takes place at the patellar tendon which is located underneath the patella. This is often used across the world as the most basic design for fitting medium and long stumps. One upside to this type of socket is that the design doesn't result in blood circulation problems or atrophy.
Other types of prosthetic sockets used in prosthetic design:
The correct amputee socket fitting is essential for the comfort and function of prosthetic legs and arms. Adjusting the fit of a prosthesis to the correct level of comfort is vital for the following:
If you are an amputee, it is essential to work with a qualified prosthetist to ensure that you have a well-fitted, weight-bearing socket. They will rectify any prosthesis fit issues to achieve the best possible results from your prosthetic device.
We're often asked, "When is a prosthesis fitted after amputation?"
Regardless of whether it's an above-the-knee or below-knee amputation prosthesis fitting, the process for a new amputee only begins after the swelling in the residual limb has subsided, and the suture line has healed, which usually takes four to six weeks after surgery.
General things you can expect during the fitting process:
The fitting process can take several weeks or even months, as your prosthetist will need to adjust the socket and other components as your residual limb changes shape and size. Be patient and work closely with your prosthetist to ensure you have a well-fitting prosthesis that meets your needs.
The next step in the fitting process is creating a temporary socket. New amputees receive a temporary prosthesis for a few months as their residual limb continues to reduce in size and mature.
However, those who have worn a prosthesis before have a much shorter fitting process ' a few days to a few weeks.
Below are some of the things you can expect during this stage of the prosthetic socket fitting process:
Remember that the temporary prosthesis may not be perfect, but it will allow you to start using your prosthesis and regain your independence.
As your residual limb changes shape and size, your prosthetist will adjust the prosthetic design. At PrimeCare, we monitor your progress with an app that provides important data for the final fitting.
Eventually, you will have a permanent prosthesis that meets your needs.
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The final stage of the fitting process is the definitive prosthesis. This is the permanent prosthesis you will use in the long term.
Your prosthetist determines the timing of casting for the definitive prosthesis. For new amputees, it is usually done several months after surgery to allow the residual limb to heal and stabilize in size and shape. However, experienced prosthetic users may undergo casting more quickly as they are accustomed to the process and adjustments.
Here are some of the things you can expect during this stage of the fitting process:
The terms "final" or "definitive" prosthesis are not necessarily absolute, meaning no prosthetic leg or arm will last forever. A prosthesis can last anywhere from two to five years, depending on daily usage and activity level.
In some cases, the prosthesis may need repairs. At other times, only single components may require replacement rather than creating an entirely new prosthesis.
It's normal for your residual limb volume to fluctuate during rehabilitation. To prevent pain and discomfort and improve the fit of your prosthesis, you should:
If your socket is too loose, switch to a thicker liner to create a snug fit and reduce the amount of movement within the socket. You may also need to reduce the number of plies (layers of fabric) in your prosthetic sock.
If your socket is too tight, switch to a thinner liner to reduce the pressure on your residual limb. You may also need to add a thin sock to take up extra volume within the socket.
Some specific recommendations:
It is important to note that these are just general recommendations. The best way to determine which liner thickness is right for you is to consult your prosthetist. They will be able to assess your needs and make a recommendation based on your situation.
Consider using a gel sheath or sock if your prosthetic socket feels loose. You can wear this thin, flexible sleeve over or under your prosthetic liner.
Here's how a gel sheath can improve your prosthetic fit:
Talk to your prosthetist to determine if a gel sheath suits you.
For any further questions regarding prosthetic sockets, or if you're ready to take the next step toward enhancing your mobility, our compassionate team is here to assist you. At PrimeCare Orthotics & Prosthetics, we are dedicated to empowering our patients with mobility and confidence.
We've aided over 30,000 individuals and specialize in lower- and upper-limb prosthetics, other prosthetic components, and customized socket shapes tailored to your needs. Contact us today to learn more about how we can support you on your journey.
Body-powered prostheses are useful tools that can restore the ability to pick up and grasp objects and assist the user's sound hand. Body-powered partial hand devices can help restore function when the finger loss is as the PIP or MCP level. For people with higher amputation levels, movements of the upper arm, shoulder and chest are captured by the harness and cable system, and used to open and close the hook or hand, similar to how a bicycle handbrake system works.
Movements of the upper arm, shoulder and chest are captured by the harness and cable system, and used to open and close the hook or hand, similar to how a bicycle handbrake system works. As users grow accustomed to the feeling of varying tension on the cable, they may experience an improved sense of the position of the limb and the degree of opening on the terminal device. Hooks can be made of aluminum, steel, or titanium and can be rubber lined for better gripping. The grip force of a voluntary opening hook is determined by the number of rubber bands holding the hook closed.
The components of a body-powered prosthesis include:
Many amputees like the durability and basic function of body-powered prostheses and find them particularly useful for working outdoors or in rugged or wet environments. A custom silicone interface can improve user comfort and is available in a wide range of colors.
If you want to learn more, please visit our website Custom Prosthetic Solutions.