The ischial containment socket has lower edges than typical transfemoral sockets and is as flexible as possible allowing muscles to move comfortably within the socket as they contract during activity and to improve comfort during sitting. The socket is held securely to the leg by suction from a vacuum pump, which makes for a firmer connection between the residual limb and prosthesis. Increased comfort, hip range of motion, and connectivity between the residual limb and prosthesis results in better functional performance for individual.
With total-contact sockets, the end of the residual limb is surrounded by a vacuum which keeps the
prosthesis in position without a pelvic joint and belt. The total-contact socket is kept in place by its
intimate fit around the limb. There is a moderate vacuum during swing phase. The intimate fit of the total-contact socket, which is made of plastic, has been designed with a view toward imitating the mechanism of the physiological pumping action performed by the muscles while walking. The pumping effect is accomplished by the amputee as he walks. In fact, a principal advantage of the total-contact socket is the mild, gentle counterpressure on the distal end of the stump during the stance phase. This positive pressure, alternating with the negative during the swing phase, improves circulation and reduces edema in the residual limb.
It starts with adjustable panels placed around the soft tissue areas of the limb. These panels are lined with padding and connected to a RevoFit™ dial that is easily turned to increase or decrease compression around the limb. Changes in activities, weight fluctuations, limb volume changes — all of these can be accommodated
for with an adjustable socket. Adjustable Sockets solve these problems by giving amputees the ability to adjust the fit of their socket with a simple twist of a dial.
The High-Fidelity Interface was developed in response to patients’ challenges that their socket is not fitting snugly or comfortably, resulting in poor positional, operational, and functional control. It was designed with the understanding that a person can have the most technologically advanced prosthetic foot, knee, hand, or arm, but if doesn’t connect to the body properly, it won’t deliver the proper results, and the individual is less likely to wear it and enjoy the benefits it is intended to deliver. This level of acceptance of a prosthetic device is what we strive for.
Because traditional sockets can be uncomfortable with their stiff, encapsulated design, Human Technology offers the Socket-less Socket manufactured by Martin Bionics. Patients report a significant improvement in comfort and quality of life with the product’s unique open socket design to dissipate heat, keep the limb cool, and eliminate sweating. Instead of having a static shape and rigid brim, the Socket-less Socket is made from ultra-conforming materials and is adjustable and customizable for even the most challenging fits. Its flexibility means it will move with you and won’t restrict range of motion like other sockets.
The Socket-less Socket is available for above knee, below knee, above elbow, below elbow, hip disarticulation, and shoulder disarticulation. Contact the Human Technology office nearest you to make an appointment with a prosthetist and explore your options for more comfortable and active living.
Human Technology understands every lower limb patient and every residual limb is different. Patients are evaluated to identify the most appropriate and comfortable prosthetic devices for them. Successful outcomes are key, but we know one size does not fit all. In addition to traditional socket systems, we offer vacuum suspension systems that focus on comfort and stability. These vacuum suspension systems consist of a sleeve creating a seal around the top edge of the socket, then a pump and exhaust valve for improved fit.
Consult with your Human Technology prosthetist to see if a vacuum suspension system is right for you.
Harmony P3 by Ottobock is a vacuum system that creates an optimal limb environment with an elevated vacuum between the liner and socket wall. It promotes natural fluid exchange and a secure fit, plus internal and external rotation for easier maneuvering and shock absorption.
Unity Vacuum System by Össur offers the security and freedom of vacuum suspension without the sensation and restrictions of a sleeve. It effectively addresses volume fluctuations and is totally compatible with Flex-Foot technology. The Seal-In liner technology is designed to conform to the residual limb, helping to distribute pressure evenly at the distal end, where volume fluctuations typically occur. The Unity is for above- and below-knee amputees, low or high active, and mechanical or microprocessor knee users.
LimbLogic by WillowWood is an electronic elevated vacuum system that features inductive charging and allows amputee to manage vacuum levels within a pre-set clinically determined range with a handheld fob. Clinicians can set the stiffness and amount of shock absorption for the patient through the pump, resulting in better patient comfort via the secure elevated vacuum.
Every person is unique as are all residual limbs. Custom liners are used for less than optimally shaped residual limbs. They are suitable for patients with a sensitive, bony, or scarred residual limb and all activity levels. They provide greater durability and help ensure a correct fit and optimal functionality.
Iceross Seal-In® X TF Liner was designed specifically to address the challenges faced by many people with transfemoral amputations. For many users, varying pressure points and the shape of their residual limb can cause problems with a suction suspension liner.
Iceross Seal-In X5 features Seal-In Technology, a sleeveless design with five integrated seals that adapt to the shape of the residual limb and the internal socket wall, providing an airtight seal. The liner offers security and freedom of movement for the amputee.
Caleo: Adaptable and nourishing, suitable for sensitive skin, the Caleo lower leg liner is made of an elastic and moldable material that can be adapted to the individual residual limb shape. Prosthesis wearers appreciate the way these characteristics reduce friction to a minimum. All liners in the Caleo product range contain nourishing mineral oil and feel soft and supple during wear.
Suspension: For some patients, suction suspension occurs either by total contact with the socket wall or with a roll-on suspension liner. The prosthetic limb fits snugly onto the residual limb, and an airtight seal is maintained. The socket has a one-way valve to expel the air out of the socket, which creates negative pressure in the socket.
Locking suspension utilizes a pin at the end of a liner. The pin connects to a shuttle lock built into the bottom of the socket. An above-knee prosthesis may use a lanyard system, which consists of a strap or braided string to pull the liner into the socket.
Older suspension methods include Straps and Belts, sometimes useful when suction is not an option. Strap suspension used with a waist belt, can be quite easy for the wearer to adjust and therefore are often a good choice for individuals likely to encounter substantial changes in residual limb volume, as in the weeks following amputation surgery.
For transfemoral amputees who cannot use suction, a Silesian belt, total elastic suspension (TES) belt, or hip joint and pelvic belt may be used for suspending the prosthesis.
