Prosthetic Sockets

Serving Charlotte, Rock Hill, & Lancaster Areas

POI’s PROSTHETIC SOCKETS are tailored to maximize comfort and functionality for each patient.

At POI, we are dedicated to revolutionizing the world of prosthetic care. We understand the profound impact that a well-fitted socket can have on a patient’s comfort, mobility, and overall quality of life. Our team is committed to providing advanced socket prosthetic solutions that are precisely tailored to meet the unique needs of each individual. Through our innovative approach and unwavering dedication to patient satisfaction, we strive to empower our clients to live life to the fullest, unrestricted by physical limitations. Join us on this journey as we redefine possibilities in prosthetic technology and care.

CUSTOM-MADE PROSTHETIC SOCKETS FOR THE CHARLOTTE, ROCK HILL & LANCASTER COMMUNITIES

The prosthetic socket is the foundational aspect of your prosthesis. When designing and developing your prosthesis, it is critical that your prosthetic socket provides comfort, stability, and appropriate sensory feedback for the residual limb. An ill-fitting prosthetic socket will lead to potential skin breakdown and other deteriorating conditions on the residual limb.

TYPES OF PROSTHETIC SOCKETS

Below are the different types of prosthetic sockets and important features to their design

Transtibial

PATELLA TENDON BEARING (PTB)

This socket is one of the most commonly used prosthetic sockets for persons with amputations below the knee. The design of this socket distributes the weight and pressure primarily through the tendon, just distal to the kneecap and the soft tissues surrounding it. PTB sockets are indicated for patients with normal tissue make-up around the patella tendon area as this is where most of the bodyweight is dispersed during weight-bearing in the prosthetic socket.

TOTAL SURFACE BEARING SOCKET

Total surface bearing (TSB) sockets are commonly used to provide hydrostatic loading over the entire residual limb. The socket is designed to distribute weight-bearing pressures evenly on the residual limb during weight-bearing activities.

Transfemoral

QUADRILATERAL SOCKET

A quadrilateral socket is rectangular in shape when viewed from the side. It typically extends above the ischial tuberosity. The quadrilateral brim supports the patient’s bodyweight through the ischial tuberosity and the surrounding soft tissues on the transfemoral residual limb.

ISCHIAL CONTAINMENT SOCKET

This secures the artificial limb onto your residual limb. There are different types of suspension. Neoprene or textile-type sleeves utilize friction to grab onto the thigh and top of the prosthesis. Occasionally, a belt or strap might be utilized to hold up the socket.

SEMI QUAD SOCKET WITH ISCHIAL CONTAINMENT

This type of socket combines both quadrilateral and ischial tuberosity modifications, including compression of soft tissues, while incorporating a mild ischial containment approach. The socket design is not as aggressive as a true ischial containment socket, but it does provide good mediolateral stability during weight-bearing for the above the knee amputee.

SUSPENSION METHODS

Pin Locking System
The pin locking system is the most common suspension method. This design incorporates a pin attached directly to gel liner placed on the residual limb. Once inside of the prosthetic socket, the patient can audibly hear the pin as it engages a lock that is placed in the very bottom of the prosthetic socket to ensure that suspension occurs. This system is more commonly used for below the knee amputations.

Suction System
Suction systems are another common suspension method. Once a prosthetic liner is properly placed on the residual limb, the patient engages into the prosthetic socket, expelling any air that is trapped inside of the socket through a one-way expulsion valve. Suspension occurs once the prosthetic liner has sealed against the inside of the prosthetic socket either via a prosthetic sleeve for the below the knee amputation or through a ceiling membrane that is incorporated on the prosthetic liner, which is most commonly used for above the knee amputations.

Vacuum Suspension
Vacuum sockets rely on an active vacuum pump instead of a passive fit to suspend the residual limb in the prosthetic socket. The vacuum assisted suspension system releases air from the prosthetic socket, creating negative pressure that pulls the prosthesis to the residual limb. This results in better proprioception, stability, and security during ambulation and activities. Vacuum systems can be incorporated with the below the knee amputee and the above knee amputee.

THE FITTING PROCESS

Initially, after your amputation, the residual limb goes through several changes, including anatomical changes due to fluid fluctuations in the residual limb. The first 12 to 18 months post-amputation is typically when the residual limb goes through the most anatomical changes. During this time, the residual matures and continues to atrophy. Taking precise measurements and 3-D imaging of the residual limb will allow your clinician to make necessary changes to your prosthetic socket.

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3D Scan

Once the limb has fully healed, a cast impression or 3-D scan will capture the shape of your residual limb.

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Second Appointment

Your second visit will incorporate the fitting of a diagnostic prosthetic socket, along with the components that you will use for ambulation, such as the prosthetic foot and endoskeletal components for angular changes.

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Follow-Up

Sometimes a second diagnostic prosthesis will need to be fabricated to ensure any adjustments required after the first visit are addressed. During this visit, you will be able to ambulate and discuss finalized adjustments with your clinician.

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Prosthesis Delivery

The next visit typically allows delivery of your preparatory or permanent prosthesis, depending on discussions you and your clinician have had.

PROSTHETIC DESIGNS EXPECTATIONS

All prosthetic designs can have fitting issues due to limb changes, potentially causing discomfort and skin problems. Therefore, it is important to maintain regular maintenance periods and visits with your clinician to ensure that your prosthesis is functioning at full capacity, and to ensure that your residual limb is healthy and there are no areas of concern.

BEGIN YOUR PROSTHETIC JOURNEY WITH POI

A well-fitting prosthetic socket is a key factor in helping individuals with limb loss improve their quality of life. Your choice of socket type should be made in consultation with your prosthetist and is one of the critical steps in having a positive outcome.

You need a supportive team to assist you in choosing the right prosthetic socket and to address other prosthetic needs. POI is here to help. Contact us today to begin your prosthetic journey with us!

QUESTIONS?
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