Active vacuum below-knee prostheses are prosthetic applications that work on the principle of a controlled vacuum (suction) created between the socket and the limb. The system aims to keep the connection between the residual limb and the socket consistent by expelling the air inside the socket. This article has been prepared to provide general information on the subject.
Working Principle
In an active vacuum system, negative pressure is created inside the socket with the help of a mechanical or electronic pump. This approach matches the general working logic of active vacuum socket systems; in this respect it differs from passive vacuum methods, which do not use an external power source. The aim is to support balanced positioning of the residual limb inside the socket and to maintain the connection throughout the day. This approach is regarded as a solution aimed at reducing volume changes inside the socket.
Possible Benefits
Depending on the person's condition, active vacuum applications may contribute in the following ways:
- They may help the connection between the socket and the residual limb remain more stable during the day.
- By reducing movement inside the socket, they may help limit skin friction.
- They may support the regulation of blood and fluid circulation in the residual limb.
The degree of these contributions varies from person to person and may not produce the same result for every user.
Suitability and Follow-up
Active vacuum below-knee prostheses are planned in line with the physician's prescription and specialist assessment. Factors such as the structure of the residual limb, skin condition and daily activity level determine suitability. Periodic check-ups, monitoring of socket fit and regular maintenance are important for the prosthesis to work correctly. Adapting to a new prosthesis may take time; it is recommended that this process be carried out under specialist supervision.
This content is for informational purposes; for diagnosis and treatment, you should consult your physician.
